darkcomet | b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa

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

C2

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
844	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
1112	attrib.exe
1616	attrib.exe

Loads dropped DLL 2 IoCs

pid	Process
1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
1856	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-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSecurityPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeTakeOwnershipPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeLoadDriverPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSystemProfilePrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSystemtimePrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeProfSingleProcessPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeIncBasePriorityPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeCreatePagefilePrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeBackupPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeRestorePrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeShutdownPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeDebugPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeSystemEnvironmentPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeChangeNotifyPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeRemoteShutdownPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeUndockPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeManageVolumePrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeImpersonatePrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: SeCreateGlobalPrivilege	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 33	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 34	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
Token: 35	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1856 wrote to memory of 828	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	30
PID 1856 wrote to memory of 828	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	30
PID 1856 wrote to memory of 828	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	30
PID 1856 wrote to memory of 828	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	30
PID 1856 wrote to memory of 1552	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	29
PID 1856 wrote to memory of 1552	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	29
PID 1856 wrote to memory of 1552	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	29
PID 1856 wrote to memory of 1552	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	29
PID 1856 wrote to memory of 844	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	32
PID 1856 wrote to memory of 844	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	32
PID 1856 wrote to memory of 844	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	32
PID 1856 wrote to memory of 844	1856	b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe	32
PID 828 wrote to memory of 1112	828	cmd.exe	33
PID 828 wrote to memory of 1112	828	cmd.exe	33
PID 828 wrote to memory of 1112	828	cmd.exe	33
PID 828 wrote to memory of 1112	828	cmd.exe	33
PID 1552 wrote to memory of 1616	1552	cmd.exe	34
PID 1552 wrote to memory of 1616	1552	cmd.exe	34
PID 1552 wrote to memory of 1616	1552	cmd.exe	34
PID 1552 wrote to memory of 1616	1552	cmd.exe	34

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1112	attrib.exe
1616	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe
"C:\Users\Admin\AppData\Local\Temp\b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa.exe"
1⤵
- Modifies WinLogon for persistence
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1856
- 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:1552
- - C:\Windows\SysWOW64\attrib.exe
    attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - Sets file to hidden
    - Views/modifies file attributes
    PID:1616
- 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:828
- - 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:1112
- C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
  "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
  2⤵
  - Executes dropped EXE
  PID:844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
756KB

MD5
37141672382ebb732e0af9461252bde5

SHA1
ccd769601b655295b89990c3076557460fbd3a9a

SHA256
b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa

SHA512
66b6c60014aaf35942a9a88868b04b7d3ed801231c957d18e73f1eb2cf54b9a8f5322cf54395c5b223f52f1cd85f5bfc404e1863222ac7b10c72de3934945e20

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe

Filesize
756KB

MD5
37141672382ebb732e0af9461252bde5

SHA1
ccd769601b655295b89990c3076557460fbd3a9a

SHA256
b35f9aa46491e8f55c615b9a62bd031050d278ec70cc45a7326efd6f9d9739aa

SHA512
66b6c60014aaf35942a9a88868b04b7d3ed801231c957d18e73f1eb2cf54b9a8f5322cf54395c5b223f52f1cd85f5bfc404e1863222ac7b10c72de3934945e20

Download Submit
memory/828-55-0x0000000000000000-mapping.dmp

Download
memory/844-59-0x0000000000000000-mapping.dmp

Download
memory/1112-62-0x0000000000000000-mapping.dmp

Download
memory/1552-56-0x0000000000000000-mapping.dmp

Download
memory/1616-63-0x0000000000000000-mapping.dmp

Download
memory/1856-54-0x0000000075D11000-0x0000000075D13000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads