URL:

https://ctac.malwat.ch/

Full analysis: https://app.any.run/tasks/23a26d92-25b6-4b2f-af59-c93721193964
Verdict: Malicious activity
Analysis date: June 03, 2020, 12:13:05
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MD5:

83C86FA60F64C4258DE362C59F50792A

SHA1:

4C76B41DEB358BEBDA09960F71A2746D2CE96F91

SHA256:

2AB6D95ED950C643B1C2F33C33D817D6EFE69CB45F9064F04DB51300F3E8A107

SSDEEP:

3:N8MtbyYn:2Mt5

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.
  • MALICIOUS

    • Application was dropped or rewritten from another process

      • UninstallTool3.exe (PID: 3816)
      • UninstallTool3.exe (PID: 2772)
      • UninstallTool.exe (PID: 2416)
      • UninstallTool.exe (PID: 988)
      • UninstallTool.exe (PID: 1248)
      • UninstallToolHelper.exe (PID: 3276)
    • Registers / Runs the DLL via REGSVR32.EXE

      • UninstallTool3.tmp (PID: 3448)
    • Loads dropped or rewritten executable

      • regsvr32.exe (PID: 2596)
    • Loads the Task Scheduler COM API

      • UninstallTool.exe (PID: 1248)
      • UninstallTool.exe (PID: 988)
    • Changes the autorun value in the registry

      • rundll32.exe (PID: 2684)
    • Actions looks like stealing of personal data

      • UninstallTool.exe (PID: 988)
  • SUSPICIOUS

    • Executable content was dropped or overwritten

      • WinRAR.exe (PID: 3828)
      • UninstallTool3.exe (PID: 2772)
      • UninstallTool3.tmp (PID: 3448)
      • rundll32.exe (PID: 2684)
    • Modifies files in Chrome extension folder

      • chrome.exe (PID: 2632)
    • Creates files in the user directory

      • UninstallTool3.tmp (PID: 3448)
      • UninstallTool.exe (PID: 988)
    • Uses RUNDLL32.EXE to load library

      • UninstallTool.exe (PID: 2416)
    • Removes files from Windows directory

      • rundll32.exe (PID: 2684)
    • Creates COM task schedule object

      • regsvr32.exe (PID: 2596)
    • Creates files in the driver directory

      • rundll32.exe (PID: 2684)
    • Creates files in the Windows directory

      • rundll32.exe (PID: 2684)
    • Application launched itself

      • UninstallTool.exe (PID: 1248)
  • INFO

    • Reads the hosts file

      • chrome.exe (PID: 2632)
      • chrome.exe (PID: 340)
    • Reads Internet Cache Settings

      • chrome.exe (PID: 2632)
    • Creates files in the program directory

      • UninstallTool3.tmp (PID: 3448)
    • Loads dropped or rewritten executable

      • UninstallTool3.tmp (PID: 3448)
    • Application was dropped or rewritten from another process

      • UninstallTool3.tmp (PID: 3448)
    • Creates a software uninstall entry

      • UninstallTool3.tmp (PID: 3448)
    • Application launched itself

      • chrome.exe (PID: 2632)
    • Manual execution by user

      • UninstallTool.exe (PID: 1248)
    • Reads settings of System Certificates

      • chrome.exe (PID: 340)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
86
Monitored processes
43
Malicious processes
6
Suspicious processes
2

Behavior graph

Click at the process to see the details
start drop and start drop and start drop and start drop and start chrome.exe chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs chrome.exe no specs winrar.exe uninstalltool3.exe no specs uninstalltool3.exe uninstalltool3.tmp regsvr32.exe no specs uninstalltool.exe no specs rundll32.exe runonce.exe no specs grpconv.exe no specs uninstalltool.exe no specs uninstalltool.exe uninstalltoolhelper.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
340"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=network --service-request-channel-token=909188515025312651 --mojo-platform-channel-handle=1556 /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exe
chrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
MEDIUM
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
524"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --lang=en-US --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --service-request-channel-token=2302618218594840005 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2268 /prefetch:1C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
988"C:\Program Files\Uninstall Tool\UninstallTool.exe" /restartC:\Program Files\Uninstall Tool\UninstallTool.exe
UninstallTool.exe
User:
admin
Company:
CrystalIDEA Software
Integrity Level:
HIGH
Description:
Uninstall Tool
Exit code:
0
Version:
3.5.9.5654
Modules
Images
c:\program files\uninstall tool\uninstalltool.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\msimg32.dll
1248"C:\Program Files\Uninstall Tool\UninstallTool.exe" C:\Program Files\Uninstall Tool\UninstallTool.exeexplorer.exe
User:
admin
Company:
CrystalIDEA Software
Integrity Level:
MEDIUM
Description:
Uninstall Tool
Exit code:
0
Version:
3.5.9.5654
Modules
Images
c:\program files\uninstall tool\uninstalltool.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\user32.dll
c:\windows\system32\gdi32.dll
c:\windows\system32\lpk.dll
c:\windows\system32\usp10.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\msimg32.dll
1672"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --disable-gpu-compositing --lang=en-US --extension-process --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --service-request-channel-token=5623977889992920614 --renderer-client-id=22 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2892 /prefetch:1C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
1680"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=utility --service-request-channel-token=15757158745443219385 --mojo-platform-channel-handle=4352 --ignored=" --type=renderer " /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
1712"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --disable-gpu-compositing --lang=en-US --enable-offline-auto-reload --enable-offline-auto-reload-visible-only --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --service-request-channel-token=8836313370452308052 --renderer-client-id=24 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2440 /prefetch:1C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
1820"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --lang=en-US --no-sandbox --service-request-channel-token=15342450363916958418 --mojo-platform-channel-handle=2968 /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
MEDIUM
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
1876"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=utility --service-request-channel-token=11809525705339929564 --mojo-platform-channel-handle=3496 --ignored=" --type=renderer " /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
1904"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --field-trial-handle=956,12587377165793950456,9253579300008284935,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=utility --service-request-channel-token=13354163007531585153 --mojo-platform-channel-handle=3528 --ignored=" --type=renderer " /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
75.0.3770.100
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\systemroot\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\75.0.3770.100\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\shell32.dll
c:\windows\system32\shlwapi.dll
c:\windows\system32\gdi32.dll
Total events
2 195
Read events
1 953
Write events
230
Delete events
12

Modification events

(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BLBeacon
Operation:writeName:failed_count
Value:
0
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BLBeacon
Operation:writeName:state
Value:
2
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\ThirdParty
Operation:writeName:StatusCodes
Value:
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\ThirdParty
Operation:writeName:StatusCodes
Value:
01000000
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BLBeacon
Operation:writeName:state
Value:
1
(PID) Process:(2564) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BrowserExitCodes
Operation:writeName:2632-13235659999691750
Value:
259
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Update\ClientState\{8A69D345-D564-463c-AFF1-A69D9E530F96}
Operation:writeName:dr
Value:
1
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome
Operation:writeName:UsageStatsInSample
Value:
0
(PID) Process:(2632) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BrowserExitCodes
Operation:delete valueName:3120-13213713943555664
Value:
0
(PID) Process:(2632) chrome.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Google\Update\ClientStateMedium\{8A69D345-D564-463C-AFF1-A69D9E530F96}
Operation:writeName:usagestats
Value:
0
Executable files
16
Suspicious files
49
Text files
329
Unknown types
19

Dropped files

PID
Process
Filename
Type
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\BrowserMetrics\BrowserMetrics-5ED793E0-A48.pma
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\31d5691c-5c34-43d7-9f89-5f24303b9a01.tmp
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\data_reduction_proxy_leveldb\000028.dbtmp
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\LOG.oldtext
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Feature Engagement Tracker\AvailabilityDB\LOG.old~RF20a2ac.TMPtext
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\data_reduction_proxy_leveldb\LOG.oldtext
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\BudgetDatabase\LOG.oldtext
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\LOG.oldtext
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\shared_proto_db\LOG.old
MD5:
SHA256:
2632chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\shared_proto_db\LOG.old~RF20a3b6.TMP
MD5:
SHA256:
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
6
TCP/UDP connections
30
DNS requests
20
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
340
chrome.exe
GET
301
172.67.176.252:80
http://dl.malwat.ch/software/useful/VMWareWorkstation12.zip
US
malicious
340
chrome.exe
GET
301
104.18.47.185:80
http://malwat.ch/
US
whitelisted
340
chrome.exe
GET
173.194.129.201:80
http://r4---sn-aigzrn7s.gvt1.com/edgedl/chromewebstore/L2Nocm9tZV9leHRlbnNpb24vYmxvYnMvOTRmQUFXVHlhaGJaUTdMLWtCSkNJUl9ZQQ/1.0.0.5_nmmhkkegccagdldgiimedpiccmgmieda.crx?cms_redirect=yes&mh=QJ&mip=185.217.117.55&mm=28&mn=sn-aigzrn7s&ms=nvh&mt=1591186157&mv=m&mvi=3&pl=25&shardbypass=yes
US
whitelisted
340
chrome.exe
GET
302
216.58.205.238:80
http://redirector.gvt1.com/edgedl/chromewebstore/L2Nocm9tZV9leHRlbnNpb24vYmxvYnMvY2Y1QUFXUjZlVjI5UldyLVpDTFJFcEx6QQ/7719.805.0.2_pkedcjkdefgpdelpbcmbmeomcjbeemfm.crx
US
html
525 b
whitelisted
340
chrome.exe
GET
200
173.194.129.201:80
http://r4---sn-aigzrn7s.gvt1.com/edgedl/chromewebstore/L2Nocm9tZV9leHRlbnNpb24vYmxvYnMvY2Y1QUFXUjZlVjI5UldyLVpDTFJFcEx6QQ/7719.805.0.2_pkedcjkdefgpdelpbcmbmeomcjbeemfm.crx?cms_redirect=yes&mh=Nf&mip=185.217.117.55&mm=28&mn=sn-aigzrn7s&ms=nvh&mt=1591186157&mv=m&mvi=3&pl=25&shardbypass=yes
US
crx
823 Kb
whitelisted
340
chrome.exe
GET
302
216.58.205.238:80
http://redirector.gvt1.com/edgedl/chromewebstore/L2Nocm9tZV9leHRlbnNpb24vYmxvYnMvOTRmQUFXVHlhaGJaUTdMLWtCSkNJUl9ZQQ/1.0.0.5_nmmhkkegccagdldgiimedpiccmgmieda.crx
US
html
520 b
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
340
chrome.exe
172.217.23.131:443
clientservices.googleapis.com
Google Inc.
US
whitelisted
340
chrome.exe
172.67.176.252:443
ctac.malwat.ch
US
malicious
340
chrome.exe
216.58.208.45:443
accounts.google.com
Google Inc.
US
whitelisted
340
chrome.exe
172.217.21.206:443
clients2.google.com
Google Inc.
US
whitelisted
340
chrome.exe
216.58.205.238:80
redirector.gvt1.com
Google Inc.
US
whitelisted
340
chrome.exe
173.194.129.201:80
r4---sn-aigzrn7s.gvt1.com
Google Inc.
US
whitelisted
172.217.23.97:443
clients2.googleusercontent.com
Google Inc.
US
whitelisted
216.58.212.164:443
www.google.com
Google Inc.
US
whitelisted
340
chrome.exe
104.18.46.185:443
ctac.malwat.ch
Cloudflare Inc
US
unknown
340
chrome.exe
104.18.47.185:80
ctac.malwat.ch
Cloudflare Inc
US
suspicious

DNS requests

Domain
IP
Reputation
ctac.malwat.ch
  • 172.67.176.252
  • 104.18.46.185
  • 104.18.47.185
malicious
clientservices.googleapis.com
  • 172.217.23.131
whitelisted
accounts.google.com
  • 216.58.208.45
shared
clients2.google.com
  • 172.217.21.206
whitelisted
redirector.gvt1.com
  • 216.58.205.238
whitelisted
r4---sn-aigzrn7s.gvt1.com
  • 173.194.129.201
whitelisted
clients2.googleusercontent.com
  • 172.217.23.97
whitelisted
www.google.com
  • 216.58.212.164
malicious
ssl.gstatic.com
  • 216.58.212.131
whitelisted
www.google.co.uk
  • 216.58.212.131
whitelisted

Threats

No threats detected
No debug info