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download:

regasm.exe

Full analysis: https://app.any.run/tasks/7a314a4f-c42d-433d-9cb1-2862d833c742
Verdict: Malicious activity
Threats:

FormBook is a data stealer that is being distributed as a MaaS. FormBook differs from a lot of competing malware by its extreme ease of use that allows even the unexperienced threat actors to use FormBook virus.

Analysis date: March 31, 2020, 08:42:39
OS: Windows 7 Professional Service Pack 1 (build: 7601, 32 bit)
Tags:
trojan
formbook
stealer
opendir
Indicators:
MIME: application/x-dosexec
File info: PE32 executable (GUI) Intel 80386, for MS Windows
MD5:

CA785E620B0DFCBA635F6D62B5DCA78C

SHA1:

18250502088E32BA1D81083365ED031F843792D3

SHA256:

7C57328D48ECD4AC542B551A7477EDB4893BE98C9B39467B97C283A50FF70BF9

SSDEEP:

24576:4Cdxte/80jYLT3U1jfsWacS4GqNWyzt2ID281y7A29J61GhMus2VfiQ:Rw80cTsjkWacmwD2h7LhMu5N

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

    • Connects to CnC server

      • explorer.exe (PID: 372)
    • FORMBOOK was detected

      • explorer.exe (PID: 372)
      • chkdsk.exe (PID: 3292)
      • Firefox.exe (PID: 4092)
    • Application was dropped or rewritten from another process

      • DllHost.exe (PID: 3736)
      • idzxwhlhbxl.exe (PID: 3440)
      • DllHost.exe (PID: 2816)
      • dllhost.exe (PID: 3516)
    • Changes the autorun value in the registry

      • chkdsk.exe (PID: 3292)
    • Actions looks like stealing of personal data

      • chkdsk.exe (PID: 3292)
    • Stealing of credential data

      • chkdsk.exe (PID: 3292)
  • SUSPICIOUS

    • Starts CMD.EXE for commands execution

      • chkdsk.exe (PID: 3292)
    • Executable content was dropped or overwritten

      • explorer.exe (PID: 372)
      • DllHost.exe (PID: 3736)
    • Executed via COM

      • DllHost.exe (PID: 3736)
    • Creates files in the program directory

      • DllHost.exe (PID: 3736)
    • Loads DLL from Mozilla Firefox

      • chkdsk.exe (PID: 3292)
    • Creates files in the user directory

      • chkdsk.exe (PID: 3292)
  • INFO

    • Reads the hosts file

      • chkdsk.exe (PID: 3292)
    • Manual execution by user

      • chkdsk.exe (PID: 3292)
    • Creates files in the user directory

      • Firefox.exe (PID: 4092)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win64 Executable (generic) (64.6)
.dll | Win32 Dynamic Link Library (generic) (15.4)
.exe | Win32 Executable (generic) (10.5)
.exe | Generic Win/DOS Executable (4.6)
.exe | DOS Executable Generic (4.6)

EXIF

EXE

CharacterSet: Unicode
LanguageCode: English (British)
FileSubtype: -
ObjectFileType: Executable application
FileOS: Win32
FileFlags: (none)
FileFlagsMask: 0x0000
ProductVersionNumber: 0.0.0.0
FileVersionNumber: 0.0.0.0
Subsystem: Windows GUI
SubsystemVersion: 5.1
ImageVersion: -
OSVersion: 5.1
EntryPoint: 0x27f4a
UninitializedDataSize: -
InitializedDataSize: 1047040
CodeSize: 581120
LinkerVersion: 12
PEType: PE32
TimeStamp: 2020:03:31 04:31:25+02:00
MachineType: Intel 386 or later, and compatibles

Summary

Architecture: IMAGE_FILE_MACHINE_I386
Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI
Compilation Date: 31-Mar-2020 02:31:25
Detected languages:
  • English - United Kingdom

DOS Header

Magic number: MZ
Bytes on last page of file: 0x0090
Pages in file: 0x0003
Relocations: 0x0000
Size of header: 0x0004
Min extra paragraphs: 0x0000
Max extra paragraphs: 0xFFFF
Initial SS value: 0x0000
Initial SP value: 0x00B8
Checksum: 0x0000
Initial IP value: 0x0000
Initial CS value: 0x0000
Overlay number: 0x0000
OEM identifier: 0x0000
OEM information: 0x0000
Address of NE header: 0x00000110

PE Headers

Signature: PE
Machine: IMAGE_FILE_MACHINE_I386
Number of sections: 5
Time date stamp: 31-Mar-2020 02:31:25
Pointer to Symbol Table: 0x00000000
Number of symbols: 0
Size of Optional Header: 0x00E0
Characteristics:
  • IMAGE_FILE_32BIT_MACHINE
  • IMAGE_FILE_EXECUTABLE_IMAGE
  • IMAGE_FILE_LARGE_ADDRESS_AWARE

Sections

Name
Virtual Address
Virtual Size
Raw Size
Charateristics
Entropy
.text
0x00001000
0x0008DD2E
0x0008DE00
IMAGE_SCN_CNT_CODE, IMAGE_SCN_MEM_EXECUTE, IMAGE_SCN_MEM_READ
6.67588
.rdata
0x0008F000
0x0002E10E
0x0002E200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
5.76073
.data
0x000BE000
0x00008F74
0x00005200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ, IMAGE_SCN_MEM_WRITE
1.19881
.rsrc
0x000C7000
0x000C53C8
0x000C5400
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_READ
7.96837
.reloc
0x0018D000
0x00007130
0x00007200
IMAGE_SCN_CNT_INITIALIZED_DATA, IMAGE_SCN_MEM_DISCARDABLE, IMAGE_SCN_MEM_READ
6.78238

Resources

Title
Entropy
Size
Codepage
Language
Type
1
5.40026
1007
Latin 1 / Western European
English - United Kingdom
RT_MANIFEST
2
2.05883
296
Latin 1 / Western European
English - United Kingdom
RT_ICON
3
2.25499
296
Latin 1 / Western European
English - United Kingdom
RT_ICON
4
3.65355
744
Latin 1 / Western European
English - United Kingdom
RT_ICON
5
3.43704
296
Latin 1 / Western European
English - United Kingdom
RT_ICON
6
4.16139
3752
Latin 1 / Western European
English - United Kingdom
RT_ICON
7
3.34702
1428
Latin 1 / Western European
English - United Kingdom
RT_STRING
8
3.2817
1674
Latin 1 / Western European
English - United Kingdom
RT_STRING
9
3.28849
1168
Latin 1 / Western European
English - United Kingdom
RT_STRING
10
3.28373
1532
Latin 1 / Western European
English - United Kingdom
RT_STRING

Imports

ADVAPI32.dll
COMCTL32.dll
COMDLG32.dll
GDI32.dll
IPHLPAPI.DLL
KERNEL32.dll
MPR.dll
OLEAUT32.dll
PSAPI.DLL
SHELL32.dll
No data.
screenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
43
Monitored processes
9
Malicious processes
3
Suspicious processes
1

Behavior graph

Click at the process to see the details
start drop and start regasm.exe no specs dllhost.exe no specs #FORMBOOK chkdsk.exe cmd.exe no specs #FORMBOOK explorer.exe Profile Notification Host no specs Copy/Move/Rename/Delete/Link Object idzxwhlhbxl.exe no specs #FORMBOOK firefox.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
1748"C:\Users\admin\AppData\Local\Temp\regasm.exe" C:\Users\admin\AppData\Local\Temp\regasm.exeexplorer.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
0
3516"C:\Windows\system32\dllhost.exe"C:\Windows\system32\dllhost.exeregasm.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
COM Surrogate
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
3292"C:\Windows\System32\chkdsk.exe"C:\Windows\System32\chkdsk.exe
explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Check Disk Utility
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
2128/c del "C:\Windows\system32\dllhost.exe"C:\Windows\System32\cmd.exechkdsk.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Command Processor
Exit code:
0
Version:
6.1.7601.17514 (win7sp1_rtm.101119-1850)
372C:\Windows\Explorer.EXEC:\Windows\explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Explorer
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
2816C:\Windows\system32\DllHost.exe /Processid:{E10F6C3A-F1AE-4ADC-AA9D-2FE65525666E}C:\Windows\system32\DllHost.exesvchost.exe
User:
SYSTEM
Company:
Microsoft Corporation
Integrity Level:
SYSTEM
Description:
COM Surrogate
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
3736C:\Windows\system32\DllHost.exe /Processid:{3AD05575-8857-4850-9277-11B85BDB8E09}C:\Windows\system32\DllHost.exe
svchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
COM Surrogate
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
3440"C:\Program Files\Y7njtohb\idzxwhlhbxl.exe"C:\Program Files\Y7njtohb\idzxwhlhbxl.exeexplorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
COM Surrogate
Exit code:
0
Version:
6.1.7600.16385 (win7_rtm.090713-1255)
4092"C:\Program Files\Mozilla Firefox\Firefox.exe"C:\Program Files\Mozilla Firefox\Firefox.exe
chkdsk.exe
User:
admin
Company:
Mozilla Corporation
Integrity Level:
MEDIUM
Description:
Firefox
Exit code:
0
Version:
68.0.1
Total events
75
Read events
63
Write events
12
Delete events
0

Modification events

(PID) Process:(372) explorer.exeKey:HKEY_CLASSES_ROOT\Local Settings\MuiCache\12B\52C64B7E
Operation:writeName:LanguageList
Value:
en-US
(PID) Process:(3292) chkdsk.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Operation:writeName:YNM0YT2XAPX
Value:
C:\Program Files\Y7njtohb\idzxwhlhbxl.exe
(PID) Process:(3292) chkdsk.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content
Operation:writeName:CachePrefix
Value:
(PID) Process:(3292) chkdsk.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies
Operation:writeName:CachePrefix
Value:
Cookie:
(PID) Process:(3292) chkdsk.exeKey:HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History
Operation:writeName:CachePrefix
Value:
Visited:
Executable files
2
Suspicious files
73
Text files
1
Unknown types
0

Dropped files

PID
Process
Filename
Type
3292chkdsk.exeC:\Users\admin\AppData\Roaming\-8A29TEF\-8Alogrc.inibinary
MD5:2855A82ECDD565B4D957EC2EE05AED26
SHA256:88E38DA5B12DD96AFD9DC90C79929EC31D8604B1AFDEBDD5A02B19249C08C939
3736DllHost.exeC:\Program Files\Y7njtohb\idzxwhlhbxl.exeexecutable
MD5:A63DC5C2EA944E6657203E0C8EDEAF61
SHA256:F7AD4B09AFB301CE46DF695B22114331A57D52E6D4163FF74787BF68CCF44C78
372explorer.exeC:\Users\admin\AppData\Local\Temp\Y7njtohb\idzxwhlhbxl.exeexecutable
MD5:A63DC5C2EA944E6657203E0C8EDEAF61
SHA256:F7AD4B09AFB301CE46DF695B22114331A57D52E6D4163FF74787BF68CCF44C78
3292chkdsk.exeC:\Users\admin\AppData\Roaming\-8A29TEF\-8Alogim.jpegimage
MD5:CD4FAD309B635E935AA512E7AF8F8417
SHA256:746D89C98FC0D6E570B6A22C443B082C3911BD3DF4936AC86931C4BF8C4D3BDE
4092Firefox.exeC:\Users\admin\AppData\Roaming\-8A29TEF\-8Alogrf.inibinary
MD5:53028481B5B5795F1501241CCC7ABFF6
SHA256:75B5F3045E20C80F264568707E2D444DC7498DB119D9661AE51A91575960FC5A
3292chkdsk.exeC:\Users\admin\AppData\Roaming\-8A29TEF\-8Alogri.inibinary
MD5:D63A82E5D81E02E399090AF26DB0B9CB
SHA256:EAECE2EBA6310253249603033C744DD5914089B0BB26BDE6685EC9813611BAAE
3292chkdsk.exeC:\Users\admin\AppData\Roaming\-8A29TEF\-8Alogrv.inibinary
MD5:BA3B6BC807D4F76794C4B81B09BB9BA5
SHA256:6EEBF968962745B2E9DE2CA969AF7C424916D4E3FE3CC0BB9B3D414ABFCE9507
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
23
TCP/UDP connections
25
DNS requests
23
Threats
0

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
372
explorer.exe
GET
50.63.202.95:80
http://www.theblackveganexperience.com/j2y/?mz7xU=ddIXaGppSuc/g+yEHnOj4aMQbXSxSkx5rHse0VEiNTFBtxSdzHd9V64nR4Gyb16aWOT3vg==&Un0=9rj8zR5hUB7LxJ00&sql=1
US
malicious
372
explorer.exe
GET
31.170.160.61:80
http://www.antoniolopezbisuteria.com/j2y/?mz7xU=7IxBLkGTcsEDUYR4Kv7mji2/Hn20we3o9yJP5+0IQq9wlk4kSJMTZzsMDMWpBmbXVJ5tLg==&Un0=9rj8zR5hUB7LxJ00
US
malicious
372
explorer.exe
POST
50.63.202.95:80
http://www.theblackveganexperience.com/j2y/
US
malicious
372
explorer.exe
POST
208.88.76.35:80
http://www.allnaturalcbdsanchorage.com/j2y/
US
malicious
372
explorer.exe
GET
205.144.171.56:80
http://www.cavilocperu.com/j2y/?mz7xU=tEUTbxHsCiQx5UkbauasSsHsnAzhVU790HvNO8rxgHz6YmU4cOjPTGWAhHzEONwVBPk0cQ==&Un0=9rj8zR5hUB7LxJ00
US
malicious
372
explorer.exe
POST
208.88.76.35:80
http://www.allnaturalcbdsanchorage.com/j2y/
US
malicious
372
explorer.exe
POST
50.63.202.95:80
http://www.theblackveganexperience.com/j2y/
US
malicious
372
explorer.exe
POST
199.192.26.97:80
http://www.doverax.com/j2y/
US
malicious
372
explorer.exe
POST
199.192.26.97:80
http://www.doverax.com/j2y/
US
malicious
372
explorer.exe
POST
404
199.192.26.97:80
http://www.doverax.com/j2y/
US
html
292 b
malicious
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
372
explorer.exe
192.0.78.25:80
www.paulmaneuvrierhervieu.com
Automattic, Inc
US
malicious
372
explorer.exe
208.88.76.35:80
www.allnaturalcbdsanchorage.com
Managed.com
US
malicious
372
explorer.exe
50.63.202.95:80
www.theblackveganexperience.com
GoDaddy.com, LLC
US
malicious
372
explorer.exe
199.192.26.97:80
www.doverax.com
US
malicious
372
explorer.exe
205.144.171.56:80
www.cavilocperu.com
Sharktech
US
malicious
372
explorer.exe
31.170.160.61:80
www.antoniolopezbisuteria.com
Hostinger International Limited
US
malicious
372
explorer.exe
74.208.236.116:80
www.homersanara.net
1&1 Internet SE
US
malicious

DNS requests

Domain
IP
Reputation
www.keloke.info
unknown
www.paulmaneuvrierhervieu.com
  • 192.0.78.25
  • 192.0.78.24
malicious
www.0k9fourhot.men
unknown
www.theblackveganexperience.com
  • 50.63.202.95
malicious
www.allnaturalcbdsanchorage.com
  • 208.88.76.35
malicious
www.bitchinkitchengifts.com
unknown
www.doverax.com
  • 199.192.26.97
malicious
www.antoniolopezbisuteria.com
  • 31.170.160.61
malicious
www.homersanara.net
  • 74.208.236.116
malicious
www.cavilocperu.com
  • 205.144.171.56
malicious

Threats

PID
Process
Class
Message
372
explorer.exe
Generic Protocol Command Decode
SURICATA HTTP Unexpected Request body
372
explorer.exe
A Network Trojan was detected
SPYWARE [PTsecurity] FormBook
372
explorer.exe
Generic Protocol Command Decode
SURICATA HTTP Unexpected Request body
372
explorer.exe
A Network Trojan was detected
SPYWARE [PTsecurity] FormBook
372
explorer.exe
Generic Protocol Command Decode
SURICATA HTTP Unexpected Request body
372
explorer.exe
A Network Trojan was detected
SPYWARE [PTsecurity] FormBook
372
explorer.exe
A Network Trojan was detected
SPYWARE [PTsecurity] FormBook
372
explorer.exe
A Network Trojan was detected
SPYWARE [PTsecurity] FormBook
372
explorer.exe
Generic Protocol Command Decode
SURICATA HTTP Unexpected Request body
372
explorer.exe
A Network Trojan was detected
SPYWARE [PTsecurity] FormBook
19 ETPRO signatures available at the full report
No debug info