darkcomet | b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa

Analysis

max time kernel
160s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2022 14:12

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General

Target

b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Size

756KB
MD5

37141672382ebb732e0af9461252bde5
SHA1

ccd769601b655295b89990c3076557460fbd3a9a
SHA256

b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa
SHA512

66b6c60014aaf35942a9a88868b04b7d3ed801231c957d18e73f1eb2cf54b9a8f5322cf54395c5b223f52f1cd85f5bfc404e1863222ac7b10c72de3934945e20
SSDEEP

12288:P9HFJ9rJxRX1uVVjoaWSoynxdO1FVBaOiRZTERfIhNkNCCLo9Ek5C/hjsvv0:5Z1xuVVjfFoynPaVBUR8f+kN10EB2vv0

Score

10^/10

darkcomet guest16 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

217.25.124.180:3460

Mutex

DC_MUTEX-K532PWX

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
EWKohsMFvhv8
install
true
offline_keylogger
true
persistence
false
reg_key
MicroUpdate

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe

Executes dropped EXE 1 IoCs

pid	Process
2356	msdcsc.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1158

pid	Process
5032	attrib.exe
4928	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2356 set thread context of 2160	2356	msdcsc.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2160	iexplore.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSecurityPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeTakeOwnershipPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeLoadDriverPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSystemProfilePrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSystemtimePrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeProfSingleProcessPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeIncBasePriorityPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeCreatePagefilePrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeBackupPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeRestorePrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeShutdownPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeDebugPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSystemEnvironmentPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeChangeNotifyPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeRemoteShutdownPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeUndockPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeManageVolumePrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeImpersonatePrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeCreateGlobalPrivilege	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 33	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 34	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 35	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 36	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeIncreaseQuotaPrivilege	2356	msdcsc.exe
Token: SeSecurityPrivilege	2356	msdcsc.exe
Token: SeTakeOwnershipPrivilege	2356	msdcsc.exe
Token: SeLoadDriverPrivilege	2356	msdcsc.exe
Token: SeSystemProfilePrivilege	2356	msdcsc.exe
Token: SeSystemtimePrivilege	2356	msdcsc.exe
Token: SeProfSingleProcessPrivilege	2356	msdcsc.exe
Token: SeIncBasePriorityPrivilege	2356	msdcsc.exe
Token: SeCreatePagefilePrivilege	2356	msdcsc.exe
Token: SeBackupPrivilege	2356	msdcsc.exe
Token: SeRestorePrivilege	2356	msdcsc.exe
Token: SeShutdownPrivilege	2356	msdcsc.exe
Token: SeDebugPrivilege	2356	msdcsc.exe
Token: SeSystemEnvironmentPrivilege	2356	msdcsc.exe
Token: SeChangeNotifyPrivilege	2356	msdcsc.exe
Token: SeRemoteShutdownPrivilege	2356	msdcsc.exe
Token: SeUndockPrivilege	2356	msdcsc.exe
Token: SeManageVolumePrivilege	2356	msdcsc.exe
Token: SeImpersonatePrivilege	2356	msdcsc.exe
Token: SeCreateGlobalPrivilege	2356	msdcsc.exe
Token: 33	2356	msdcsc.exe
Token: 34	2356	msdcsc.exe
Token: 35	2356	msdcsc.exe
Token: 36	2356	msdcsc.exe
Token: SeIncreaseQuotaPrivilege	2160	iexplore.exe
Token: SeSecurityPrivilege	2160	iexplore.exe
Token: SeTakeOwnershipPrivilege	2160	iexplore.exe
Token: SeLoadDriverPrivilege	2160	iexplore.exe
Token: SeSystemProfilePrivilege	2160	iexplore.exe
Token: SeSystemtimePrivilege	2160	iexplore.exe
Token: SeProfSingleProcessPrivilege	2160	iexplore.exe
Token: SeIncBasePriorityPrivilege	2160	iexplore.exe
Token: SeCreatePagefilePrivilege	2160	iexplore.exe
Token: SeBackupPrivilege	2160	iexplore.exe
Token: SeRestorePrivilege	2160	iexplore.exe
Token: SeShutdownPrivilege	2160	iexplore.exe
Token: SeDebugPrivilege	2160	iexplore.exe
Token: SeSystemEnvironmentPrivilege	2160	iexplore.exe
Token: SeChangeNotifyPrivilege	2160	iexplore.exe
Token: SeRemoteShutdownPrivilege	2160	iexplore.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2160	iexplore.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 1052 wrote to memory of 4452	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	78
PID 1052 wrote to memory of 4452	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	78
PID 1052 wrote to memory of 4452	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	78
PID 1052 wrote to memory of 4312	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	79
PID 1052 wrote to memory of 4312	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	79
PID 1052 wrote to memory of 4312	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	79
PID 1052 wrote to memory of 2356	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	82
PID 1052 wrote to memory of 2356	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	82
PID 1052 wrote to memory of 2356	1052	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	82
PID 4312 wrote to memory of 5032	4312	cmd.exe	83
PID 4312 wrote to memory of 5032	4312	cmd.exe	83
PID 4312 wrote to memory of 5032	4312	cmd.exe	83
PID 2356 wrote to memory of 2160	2356	msdcsc.exe	84
PID 2356 wrote to memory of 2160	2356	msdcsc.exe	84
PID 2356 wrote to memory of 2160	2356	msdcsc.exe	84
PID 4452 wrote to memory of 4928	4452	cmd.exe	85
PID 4452 wrote to memory of 4928	4452	cmd.exe	85
PID 4452 wrote to memory of 4928	4452	cmd.exe	85
PID 2356 wrote to memory of 2160	2356	msdcsc.exe	84
PID 2356 wrote to memory of 2160	2356	msdcsc.exe	84
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86
PID 2160 wrote to memory of 4992	2160	iexplore.exe	86

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
5032	attrib.exe
4928	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
"C:\Users\Admin\AppData\Local\Temp\b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1052
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4452
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp\b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:4928
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4312
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:5032
- C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
  "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2356
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2160
  - - C:\Windows\SysWOW64\notepad.exe
      notepad
      4⤵
      PID:4992

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
756KB

MD5
37141672382ebb732e0af9461252bde5

SHA1
ccd769601b655295b89990c3076557460fbd3a9a

SHA256
b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa

SHA512
66b6c60014aaf35942a9a88868b04b7d3ed801231c957d18e73f1eb2cf54b9a8f5322cf54395c5b223f52f1cd85f5bfc404e1863222ac7b10c72de3934945e20

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C:\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
756KB

MD5
37141672382ebb732e0af9461252bde5

SHA1
ccd769601b655295b89990c3076557460fbd3a9a

SHA256
b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa

SHA512
66b6c60014aaf35942a9a88868b04b7d3ed801231c957d18e73f1eb2cf54b9a8f5322cf54395c5b223f52f1cd85f5bfc404e1863222ac7b10c72de3934945e20

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads