darkcomet | a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2

General

Target

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe
Size

452KB
MD5

95338d4bf0749e280fb3dd156c173e65
SHA1

18e760995c269c6f052c476cda1e981df13828ec
SHA256

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2
SHA512

a4cccd475eebba68bb2a36d819435bf83fabd7d6741dd51a794879dad88594e676a7d5542e7be0c04ee4476d1bb2743fd3238c1227b207e1dcd3dcf09c442533
SSDEEP

6144:fcV+uhsCuKQ+FD+TG1hPApaKYoCG9+ExwPIGFGZgH/Rgy/eQq3EK42Nlw3Zp/7US:fyTuKQyD+TKSBwA2ZgbQqAH4G2htZm

Score

10^/10

darkcomet persistence rat trojan upx

Malware Config

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

Processes:

vbc.exe

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"	vbc.exe

Executes dropped EXE 2 IoCs

Processes:

vbc.exemsdcsc.exe

pid process

1664 vbc.exe
620 msdcsc.exe

pid	process
1664	vbc.exe
620	msdcsc.exe

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1664-61-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral1/memory/1664-59-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral1/memory/1664-63-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral1/memory/1664-66-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral1/memory/1664-69-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral1/memory/1664-70-0x0000000000400000-0x00000000004F9000-memory.dmp	upx
behavioral1/memory/1664-72-0x0000000000400000-0x00000000004F9000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exevbc.exe

pid process

1864 a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe
1664 vbc.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

pid	process
1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe
1664	vbc.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\msdcsc.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe

description	pid	process	target process
PID 1864 set thread context of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.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

Processes:

vbc.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1664	vbc.exe
Token: SeSecurityPrivilege	1664	vbc.exe
Token: SeTakeOwnershipPrivilege	1664	vbc.exe
Token: SeLoadDriverPrivilege	1664	vbc.exe
Token: SeSystemProfilePrivilege	1664	vbc.exe
Token: SeSystemtimePrivilege	1664	vbc.exe
Token: SeProfSingleProcessPrivilege	1664	vbc.exe
Token: SeIncBasePriorityPrivilege	1664	vbc.exe
Token: SeCreatePagefilePrivilege	1664	vbc.exe
Token: SeBackupPrivilege	1664	vbc.exe
Token: SeRestorePrivilege	1664	vbc.exe
Token: SeShutdownPrivilege	1664	vbc.exe
Token: SeDebugPrivilege	1664	vbc.exe
Token: SeSystemEnvironmentPrivilege	1664	vbc.exe
Token: SeChangeNotifyPrivilege	1664	vbc.exe
Token: SeRemoteShutdownPrivilege	1664	vbc.exe
Token: SeUndockPrivilege	1664	vbc.exe
Token: SeManageVolumePrivilege	1664	vbc.exe
Token: SeImpersonatePrivilege	1664	vbc.exe
Token: SeCreateGlobalPrivilege	1664	vbc.exe
Token: 33	1664	vbc.exe
Token: 34	1664	vbc.exe
Token: 35	1664	vbc.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exevbc.exe

description	pid	process	target process
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1864 wrote to memory of 1664	1864	a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe	vbc.exe
PID 1664 wrote to memory of 620	1664	vbc.exe	msdcsc.exe
PID 1664 wrote to memory of 620	1664	vbc.exe	msdcsc.exe
PID 1664 wrote to memory of 620	1664	vbc.exe	msdcsc.exe
PID 1664 wrote to memory of 620	1664	vbc.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe
"C:\Users\Admin\AppData\Local\Temp\a975c97d72bbaf38dd2500653721ec7a6d85153ddb6cba2a33cd6a009dad1ab2.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1864

C:\Users\Admin\AppData\Local\Temp\vbc.exe
C:\Users\Admin\AppData\Local\Temp\vbc.exe
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1664

C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
"C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
3⤵
- Executes dropped EXE
PID:620

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Scripting

1

T1064

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\vbc.exe
Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
C:\Users\Admin\AppData\Local\Temp\vbc.exe
Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
\Users\Admin\AppData\Local\Temp\vbc.exe
Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
\Users\Admin\Documents\MSDCSC\msdcsc.exe
Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/620-74-0x0000000000000000-mapping.dmp

Download
memory/1664-64-0x00000000004DE9F0-mapping.dmp

Download
memory/1664-66-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-63-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-69-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-70-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-59-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-72-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-61-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1664-58-0x0000000000400000-0x00000000004F9000-memory.dmp

Filesize
996KB

Download
memory/1864-54-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1864-68-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/1864-56-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/1864-55-0x0000000075911000-0x0000000075913000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads