darkcomet | 3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d

General

Target

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
Size

557KB
MD5

316ced1fc09909dff0b75efbd0da2ae0
SHA1

2d5cb13b6c956f8a7b6307d7f629a56117d2d9ee
SHA256

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d
SHA512

fca713a6489bf4d87be23d9fbc6e9aa6fccf8a6329d1abed6e2e28bf2286f2fd78486cd77111eabed293f29fac81bfa1fbd9c8f9ebdb1452cd5af9eb41bdd5ad

Score

10^/10

darkcomet 2020okt999+++4 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

2020okt999+++4

C2

sandyclark255.hopto.org:1605

Mutex

DC_MUTEX-D50H81E

Attributes

InstallPath
word64l.exe
gencode
0zgSCfjSH24W
install
true
offline_keylogger
true
password
hhhhhh
persistence
true
reg_key
winworde

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:

rwewqr.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\\word64l.exe"	rwewqr.exe

Drops file in Drivers directory 1 IoCs

Processes:

rwewqr.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts rwewqr.exe
Executes dropped EXE 2 IoCs

Processes:

rwewqr.exeword64l.exe

pid process

600 rwewqr.exe
2836 word64l.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

Processes:

rwewqr.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation rwewqr.exe

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	rwewqr.exe

pid	process
600	rwewqr.exe
2836	word64l.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Control Panel\International\Geo\Nation	rwewqr.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

rwewqr.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\winworde = "C:\\Users\\Admin\\Documents\\word64l.exe"	rwewqr.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe

description	ioc	process
File created	C:\Windows\assembly\Desktop.ini	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe

description	pid	process	target process
PID 688 set thread context of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe

Drops file in Windows directory 3 IoCs

Processes:

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe

description	ioc	process
File opened for modification	C:\Windows\assembly\Desktop.ini	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
File opened for modification	C:\Windows\assembly	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
File created	C:\Windows\assembly\Desktop.ini	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe

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

System Information Discovery
T1082

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	process	target process
1336	688	WerFault.exe	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
3384	2836	WerFault.exe	word64l.exe

Modifies registry class 1 IoCs

Processes:

rwewqr.exe

description ioc process

Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance rwewqr.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance	rwewqr.exe

Suspicious behavior: EnumeratesProcesses 34 IoCs

Processes:

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exeword64l.exeWerFault.exeWerFault.exe

pid	process
688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
2836	word64l.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
3384	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe
1336	WerFault.exe

Suspicious use of AdjustPrivilegeToken 31 IoCs

Processes:

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exerwewqr.exeWerFault.exeword64l.exeWerFault.exe

description	pid	process
Token: SeDebugPrivilege	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
Token: SeDebugPrivilege	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
Token: SeIncreaseQuotaPrivilege	600	rwewqr.exe
Token: SeSecurityPrivilege	600	rwewqr.exe
Token: SeTakeOwnershipPrivilege	600	rwewqr.exe
Token: SeLoadDriverPrivilege	600	rwewqr.exe
Token: SeSystemProfilePrivilege	600	rwewqr.exe
Token: SeSystemtimePrivilege	600	rwewqr.exe
Token: SeProfSingleProcessPrivilege	600	rwewqr.exe
Token: SeIncBasePriorityPrivilege	600	rwewqr.exe
Token: SeCreatePagefilePrivilege	600	rwewqr.exe
Token: SeBackupPrivilege	600	rwewqr.exe
Token: SeRestorePrivilege	600	rwewqr.exe
Token: SeShutdownPrivilege	600	rwewqr.exe
Token: SeDebugPrivilege	600	rwewqr.exe
Token: SeSystemEnvironmentPrivilege	600	rwewqr.exe
Token: SeChangeNotifyPrivilege	600	rwewqr.exe
Token: SeRemoteShutdownPrivilege	600	rwewqr.exe
Token: SeUndockPrivilege	600	rwewqr.exe
Token: SeManageVolumePrivilege	600	rwewqr.exe
Token: SeImpersonatePrivilege	600	rwewqr.exe
Token: SeCreateGlobalPrivilege	600	rwewqr.exe
Token: 33	600	rwewqr.exe
Token: 34	600	rwewqr.exe
Token: 35	600	rwewqr.exe
Token: 36	600	rwewqr.exe
Token: SeRestorePrivilege	1336	WerFault.exe
Token: SeBackupPrivilege	1336	WerFault.exe
Token: SeDebugPrivilege	2836	word64l.exe
Token: SeDebugPrivilege	3384	WerFault.exe
Token: SeDebugPrivilege	1336	WerFault.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exerwewqr.exe

description	pid	process	target process
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 688 wrote to memory of 600	688	3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe	rwewqr.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 204	600	rwewqr.exe	notepad.exe
PID 600 wrote to memory of 2836	600	rwewqr.exe	word64l.exe
PID 600 wrote to memory of 2836	600	rwewqr.exe	word64l.exe
PID 600 wrote to memory of 2836	600	rwewqr.exe	word64l.exe

C:\Users\Admin\AppData\Local\Temp\3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe
"C:\Users\Admin\AppData\Local\Temp\3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:688

C:\Users\Admin\AppData\Local\Temp\0ed94wxm0ij5U6Fj\rwewqr.exe
"C:\Users\Admin\AppData\Local\Temp\0ed94wxm0ij5U6Fj\rwewqr.exe"
2⤵
- Modifies WinLogon for persistence
- Drops file in Drivers directory
- Executes dropped EXE
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:600

C:\Windows\SysWOW64\notepad.exe
notepad
3⤵
PID:204

C:\Users\Admin\Documents\word64l.exe
"C:\Users\Admin\Documents\word64l.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2836

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2836 -s 1036
4⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 688 -s 1172
2⤵
- Program crash
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1336

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\0ed94wxm0ij5U6Fj\rwewqr.exe
MD5
316ced1fc09909dff0b75efbd0da2ae0

SHA1
2d5cb13b6c956f8a7b6307d7f629a56117d2d9ee

SHA256
3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d

SHA512
fca713a6489bf4d87be23d9fbc6e9aa6fccf8a6329d1abed6e2e28bf2286f2fd78486cd77111eabed293f29fac81bfa1fbd9c8f9ebdb1452cd5af9eb41bdd5ad

Download Submit
C:\Users\Admin\AppData\Local\Temp\0ed94wxm0ij5U6Fj\rwewqr.exe
MD5
316ced1fc09909dff0b75efbd0da2ae0

SHA1
2d5cb13b6c956f8a7b6307d7f629a56117d2d9ee

SHA256
3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d

SHA512
fca713a6489bf4d87be23d9fbc6e9aa6fccf8a6329d1abed6e2e28bf2286f2fd78486cd77111eabed293f29fac81bfa1fbd9c8f9ebdb1452cd5af9eb41bdd5ad

Download Submit
C:\Users\Admin\Documents\word64l.exe
MD5
316ced1fc09909dff0b75efbd0da2ae0

SHA1
2d5cb13b6c956f8a7b6307d7f629a56117d2d9ee

SHA256
3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d

SHA512
fca713a6489bf4d87be23d9fbc6e9aa6fccf8a6329d1abed6e2e28bf2286f2fd78486cd77111eabed293f29fac81bfa1fbd9c8f9ebdb1452cd5af9eb41bdd5ad

Download Submit
C:\Users\Admin\Documents\word64l.exe
MD5
316ced1fc09909dff0b75efbd0da2ae0

SHA1
2d5cb13b6c956f8a7b6307d7f629a56117d2d9ee

SHA256
3b93bbc5e1fe38dd279812cc19777eea51faf580c97d1713e8c54448f949647d

SHA512
fca713a6489bf4d87be23d9fbc6e9aa6fccf8a6329d1abed6e2e28bf2286f2fd78486cd77111eabed293f29fac81bfa1fbd9c8f9ebdb1452cd5af9eb41bdd5ad

Download Submit
memory/204-5-0x0000000000000000-mapping.dmp

Download
memory/204-6-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/204-7-0x0000000000000000-mapping.dmp

Download
memory/600-0-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/600-1-0x000000000048F888-mapping.dmp

Download
memory/600-4-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1336-20-0x00000000059C0000-0x00000000059C1000-memory.dmp

Filesize
4KB

Download
memory/1336-11-0x0000000004EA0000-0x0000000004EA1000-memory.dmp

Filesize
4KB

Download
memory/2836-18-0x0000000000000000-mapping.dmp

Download
memory/2836-8-0x0000000000000000-mapping.dmp

Download
memory/2836-14-0x0000000000000000-mapping.dmp

Download
memory/2836-15-0x0000000000000000-mapping.dmp

Download
memory/2836-16-0x0000000000000000-mapping.dmp

Download
memory/2836-17-0x0000000000000000-mapping.dmp

Download
memory/2836-44-0x0000000000000000-mapping.dmp

Download
memory/2836-13-0x0000000000000000-mapping.dmp

Download
memory/2836-42-0x0000000000000000-mapping.dmp

Download
memory/2836-36-0x0000000000000000-mapping.dmp

Download
memory/2836-37-0x0000000000000000-mapping.dmp

Download
memory/2836-40-0x0000000000000000-mapping.dmp

Download
memory/3384-22-0x0000000005370000-0x0000000005371000-memory.dmp

Filesize
4KB

Download
memory/3384-12-0x0000000004910000-0x0000000004911000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads