URL:

http://dolohen.com/apu.php?zoneid=2516744

Full analysis: https://app.any.run/tasks/c1b38ad0-c2a1-48c3-885e-bc5cd53222dd
Verdict: Malicious activity
Analysis date: December 06, 2022, 06:04:42
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Indicators:
MD5:

94D4A8F367BC9EE862A4C4026D4E2532

SHA1:

9B72C22E09213B4648E9C62385AD24B18AC9ADC6

SHA256:

30D6609E9DFA98FF0E14F5E1F0E718FE766B2EA5F5FD1BF0BB4A3AEA8EA93ABC

SSDEEP:

3:N1KaKkEGK0gV6i12Tyn:CaTvTgVzayn

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

    No malicious indicators.
  • SUSPICIOUS

    No suspicious indicators.
  • INFO

    • Application launched itself

      • chrome.exe (PID: 1864)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.
No data.
screenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
50
Monitored processes
16
Malicious processes
0
Suspicious processes
0

Behavior graph

Click at the process to see the details
start chrome.exe 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

Process information

PID
CMD
Path
Indicators
Parent process
1864"C:\Program Files\Google\Chrome\Application\chrome.exe" --disk-cache-dir=null --disk-cache-size=1 --media-cache-size=1 --disable-gpu-shader-disk-cache --disable-background-networking "http://dolohen.com/apu.php?zoneid=2516744"C:\Program Files\Google\Chrome\Application\chrome.exe
Explorer.EXE
User:
admin
Company:
Google LLC
Integrity Level:
MEDIUM
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\kernel32.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\winmm.dll
c:\windows\system32\user32.dll
1848"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win32 --annotation=prod=Chrome --annotation=ver=86.0.4240.198 --initial-client-data=0xc8,0xcc,0xd0,0x9c,0xd4,0x6e95d988,0x6e95d998,0x6e95d9a4C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
MEDIUM
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\windows\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\kernel32.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\shlwapi.dll
708"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --gpu-preferences=MAAAAAAAAADgACAwAAAAAAAAAAAAAAAAAABgAAAAAAAQAAAAAAAAAAAAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAA= --mojo-platform-channel-handle=1036 /prefetch:2C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Exit code:
0
Version:
86.0.4240.198
Modules
Images
c:\windows\system32\kernel32.dll
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\version.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\shell32.dll
2140"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=network --mojo-platform-channel-handle=1260 /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exe
chrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
MEDIUM
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\gdi32.dll
3752"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=1848 /prefetch:1C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\user32.dll
3252"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=1864 /prefetch:1C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\ntdll.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\version.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\shell32.dll
3980"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --lang=en-US --extension-process --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=4 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2188 /prefetch:1C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\shell32.dll
880"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --gpu-preferences=MAAAAAAAAADgACAwAAAAAAAAAAAAAAAAAABgAAAAAAAQAAAAAAAAAAAAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAA= --use-gl=swiftshader-webgl --mojo-platform-channel-handle=1132 /prefetch:2C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
LOW
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\shell32.dll
3024"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3132 /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:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\shell32.dll
3384"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=1024,4633032178302777781,11643593335657702455,131072 --enable-features=PasswordImport --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3180 /prefetch:8C:\Program Files\Google\Chrome\Application\chrome.exechrome.exe
User:
admin
Company:
Google LLC
Integrity Level:
MEDIUM
Description:
Google Chrome
Version:
86.0.4240.198
Modules
Images
c:\program files\google\chrome\application\chrome.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\kernel32.dll
c:\program files\google\chrome\application\86.0.4240.198\chrome_elf.dll
c:\windows\system32\version.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\api-ms-win-downlevel-shell32-l1-1-0.dll
c:\windows\system32\api-ms-win-core-synch-l1-2-0.dll
c:\windows\system32\shell32.dll
Total events
5 885
Read events
5 813
Write events
66
Delete events
6

Modification events

(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BLBeacon
Operation:writeName:failed_count
Value:
0
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BLBeacon
Operation:writeName:state
Value:
2
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\ThirdParty
Operation:writeName:StatusCodes
Value:
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\ThirdParty
Operation:writeName:StatusCodes
Value:
01000000
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome\BLBeacon
Operation:writeName:state
Value:
1
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Update\ClientState\{8A69D345-D564-463c-AFF1-A69D9E530F96}
Operation:writeName:dr
Value:
1
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Chrome
Operation:writeName:UsageStatsInSample
Value:
0
(PID) Process:(1864) chrome.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Google\Update\ClientStateMedium\{8A69D345-D564-463C-AFF1-A69D9E530F96}
Operation:writeName:usagestats
Value:
0
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Update\ClientState\{8A69D345-D564-463c-AFF1-A69D9E530F96}
Operation:writeName:metricsid
Value:
(PID) Process:(1864) chrome.exeKey:HKEY_CURRENT_USER\Software\Google\Update\ClientState\{8A69D345-D564-463c-AFF1-A69D9E530F96}
Operation:writeName:metricsid_installdate
Value:
0
Executable files
1
Suspicious files
21
Text files
118
Unknown types
2

Dropped files

PID
Process
Filename
Type
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\BrowserMetrics\BrowserMetrics-638EDB80-748.pma
MD5:
SHA256:
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Platform Notifications\LOG.oldtext
MD5:EF1D5606A483BB6C72C81A3F649BEB18
SHA256:BA083E7585ADA9936944FE56BC0141A544F18A01C3424E5C9F02375B34FE3D45
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\pkedcjkdefgpdelpbcmbmeomcjbeemfm\LOG.oldtext
MD5:5202CA4D6AF0C37DAEC0D528CC7F2986
SHA256:8F5B8FF94B14C36EA0CBE8FA0A4D165A632B45F834BBB7239E1A6CF6685F256C
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\LOG.old~RF107039a.TMPtext
MD5:64AD8ED3E666540337BA541C549F72F7
SHA256:BECBDB08B5B37D203A85F2E974407334053BB1D2270F0B3C9A4DB963896F2206
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Session Storage\LOG.oldtext
MD5:995C92837E4775CAFFE387D51ADBA520
SHA256:51247C3464FD988B72670002D01A57FBFF1348704D325DC8FF8817ED2459D0D9
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\LOG.oldtext
MD5:5BD3C311F2136A7A88D3E197E55CF902
SHA256:FA331915E1797E59979A3E4BCC2BD0D3DEAA039B94D4DB992BE251FD02A224B9
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\pkedcjkdefgpdelpbcmbmeomcjbeemfm\LOG.old~RF107084d.TMPtext
MD5:D0BA19096D6C8F8DE58312E8D938E893
SHA256:AADE90A7B0984F3C719D528E4E6FAE3854E28B30363BDD4DF65037E69784A078
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Session Storage\LOG.old~RF1070511.TMPtext
MD5:B628564B8042F6E2CC2F53710AAECDC0
SHA256:1D3B022BDEE9F48D79E3EC1E93F519036003642D3D72D10B05CFD47F43EFBF13
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Local Storage\leveldb\LOG.old~RF107039a.TMPtext
MD5:81F483F77EE490F35306A4F94DB2286B
SHA256:82434CE3C9D13F509EBEEBE3A7A1A1DE9AB4557629D9FC855761E0CFA45E8BCE
1864chrome.exeC:\Users\admin\AppData\Local\Google\Chrome\User Data\Default\Site Characteristics Database\LOG.oldtext
MD5:8FF312A95D60ED89857FEB720D80D4E1
SHA256:946A57FAFDD28C3164D5AB8AB4971B21BD5EC5BFFF7554DBF832CB58CC37700B
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
33
TCP/UDP connections
20
DNS requests
8
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
2140
chrome.exe
GET
204
139.45.197.236:80
http://dolohen.com/apu.php?zoneid=2516744
US
malicious
2140
chrome.exe
GET
204
139.45.197.236:80
http://dolohen.com/favicon.ico
US
text
7 b
malicious
868
svchost.exe
HEAD
200
34.104.35.123:80
http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/ac5q25btpqhkjhcekqoslcldvuya_1.3.36.141/ihnlcenocehgdaegdmhbidjhnhdchfmm_1.3.36.141_win_ehzjmd5kjmert7jdgsrj4xqxj4.crx3
US
whitelisted
2140
chrome.exe
GET
404
139.45.197.236:80
http://dolohen.com/apu.php
US
text
7 b
malicious
2140
chrome.exe
GET
204
139.45.197.236:80
http://dolohen.com/apu.php?zoneid=2516744
US
malicious
868
svchost.exe
GET
206
34.104.35.123:80
http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/ac5q25btpqhkjhcekqoslcldvuya_1.3.36.141/ihnlcenocehgdaegdmhbidjhnhdchfmm_1.3.36.141_win_ehzjmd5kjmert7jdgsrj4xqxj4.crx3
US
binary
6.50 Kb
whitelisted
868
svchost.exe
GET
206
34.104.35.123:80
http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/ac5q25btpqhkjhcekqoslcldvuya_1.3.36.141/ihnlcenocehgdaegdmhbidjhnhdchfmm_1.3.36.141_win_ehzjmd5kjmert7jdgsrj4xqxj4.crx3
US
binary
10.2 Kb
whitelisted
868
svchost.exe
GET
206
34.104.35.123:80
http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/ac5q25btpqhkjhcekqoslcldvuya_1.3.36.141/ihnlcenocehgdaegdmhbidjhnhdchfmm_1.3.36.141_win_ehzjmd5kjmert7jdgsrj4xqxj4.crx3
US
binary
10.0 Kb
whitelisted
868
svchost.exe
GET
206
34.104.35.123:80
http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/ac5q25btpqhkjhcekqoslcldvuya_1.3.36.141/ihnlcenocehgdaegdmhbidjhnhdchfmm_1.3.36.141_win_ehzjmd5kjmert7jdgsrj4xqxj4.crx3
US
binary
10.2 Kb
whitelisted
868
svchost.exe
GET
206
34.104.35.123:80
http://edgedl.me.gvt1.com/edgedl/release2/chrome_component/ac5q25btpqhkjhcekqoslcldvuya_1.3.36.141/ihnlcenocehgdaegdmhbidjhnhdchfmm_1.3.36.141_win_ehzjmd5kjmert7jdgsrj4xqxj4.crx3
US
binary
22.5 Kb
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
2140
chrome.exe
142.250.186.164:443
www.google.com
GOOGLE
US
whitelisted
2140
chrome.exe
142.250.184.227:443
ssl.gstatic.com
GOOGLE
US
whitelisted
2140
chrome.exe
139.45.197.236:80
dolohen.com
RETN Limited
GB
malicious
2140
chrome.exe
172.217.169.173:443
accounts.google.com
GOOGLE
US
suspicious
2140
chrome.exe
142.250.187.142:443
clients2.google.com
GOOGLE
US
whitelisted
172.217.169.173:443
accounts.google.com
GOOGLE
US
suspicious
2140
chrome.exe
142.250.185.99:443
update.googleapis.com
GOOGLE
US
whitelisted
868
svchost.exe
34.104.35.123:80
edgedl.me.gvt1.com
GOOGLE
US
whitelisted
2140
chrome.exe
142.250.185.206:443
clients1.google.com
GOOGLE
US
whitelisted

DNS requests

Domain
IP
Reputation
dolohen.com
  • 139.45.197.236
malicious
clients2.google.com
  • 142.250.187.142
whitelisted
accounts.google.com
  • 172.217.169.173
shared
ssl.gstatic.com
  • 142.250.184.227
whitelisted
www.google.com
  • 142.250.186.164
whitelisted
update.googleapis.com
  • 142.250.185.99
whitelisted
edgedl.me.gvt1.com
  • 34.104.35.123
whitelisted
clients1.google.com
  • 142.250.185.206
whitelisted

Threats

No threats detected
No debug info