darkcomet | f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e

General

Target

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
Size

1.5MB
MD5

28ab0f56fe107f1ccd4454b5aaee9f44
SHA1

bf97582c24e7617d370ba436e7a7f5f49bedf9e4
SHA256

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e
SHA512

7fa9d93e12c98fa741ac4545cc92054745e7445df2262a58ec8765fccc9d0ebb359023022f67a9c66e4a3c46b5978f25795e00e4103aa2960a91e18e2579343f
SSDEEP

24576:rbCj2sObHtqQ4Qr99spUp0spxp6yzNl4q3mvNQM3YKp:rbCjPKNqQApUprpxp6yzNRa

Score

10^/10

darkcomet bot persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Bot

C2

thankforthisfdp.crabdance.com:1604

Mutex

DCMIN_MUTEX-MELURR9

Attributes

gencode
yRLcrSwVsvEJ
install
false
offline_keylogger
true
persistence
false

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:

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\SysWOW64\\Userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\Microsoft Maintenance\\WinData.exe"	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

UPX packed file 6 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3436-133-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3436-134-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3436-135-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3436-136-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3436-137-0x0000000000400000-0x00000000004B7000-memory.dmp	upx
behavioral2/memory/3436-138-0x0000000000400000-0x00000000004B7000-memory.dmp	upx

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Microsoft Corporation = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ind\\boot.lnk,explorer.exe"	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Microsoft Corporation = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Ind\\boot.lnk"	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
Key created	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

description	pid	process	target process
PID 4968 set thread context of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

pid	process
4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

dllhost.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	3436	dllhost.exe
Token: SeSecurityPrivilege	3436	dllhost.exe
Token: SeTakeOwnershipPrivilege	3436	dllhost.exe
Token: SeLoadDriverPrivilege	3436	dllhost.exe
Token: SeSystemProfilePrivilege	3436	dllhost.exe
Token: SeSystemtimePrivilege	3436	dllhost.exe
Token: SeProfSingleProcessPrivilege	3436	dllhost.exe
Token: SeIncBasePriorityPrivilege	3436	dllhost.exe
Token: SeCreatePagefilePrivilege	3436	dllhost.exe
Token: SeBackupPrivilege	3436	dllhost.exe
Token: SeRestorePrivilege	3436	dllhost.exe
Token: SeShutdownPrivilege	3436	dllhost.exe
Token: SeDebugPrivilege	3436	dllhost.exe
Token: SeSystemEnvironmentPrivilege	3436	dllhost.exe
Token: SeChangeNotifyPrivilege	3436	dllhost.exe
Token: SeRemoteShutdownPrivilege	3436	dllhost.exe
Token: SeUndockPrivilege	3436	dllhost.exe
Token: SeManageVolumePrivilege	3436	dllhost.exe
Token: SeImpersonatePrivilege	3436	dllhost.exe
Token: SeCreateGlobalPrivilege	3436	dllhost.exe
Token: 33	3436	dllhost.exe
Token: 34	3436	dllhost.exe
Token: 35	3436	dllhost.exe
Token: 36	3436	dllhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

dllhost.exe

pid process

3436 dllhost.exe

pid	process
3436	dllhost.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe

description	pid	process	target process
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe
PID 4968 wrote to memory of 3436	4968	f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe	dllhost.exe

C:\Users\Admin\AppData\Local\Temp\f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe
"C:\Users\Admin\AppData\Local\Temp\f16146b2813264d6839db18045588636224d0c54680e22a2d3922a66c2707b0e.exe"
1⤵
- Modifies WinLogon for persistence
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4968

C:\Windows\SysWOW64\dllhost.exe
"C:\Windows\System32\dllhost.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3436

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

1

T1004

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/3436-132-0x0000000000000000-mapping.dmp

Download
memory/3436-133-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3436-134-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3436-135-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3436-136-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3436-137-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download
memory/3436-138-0x0000000000400000-0x00000000004B7000-memory.dmp

Filesize
732KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads