darkcomet | 6609f8a3eb1784fe12d91be389de594b5b9a0ccea15cd0de4ecbd5fe52638f20

General

Target

3e30c9cbfed6311e5ebe149203bc4839.exe
Size

1.1MB
MD5

3e30c9cbfed6311e5ebe149203bc4839
SHA1

fcca7dc34ad5b01e45b3d834a43c59fac8cf527c
SHA256

6609f8a3eb1784fe12d91be389de594b5b9a0ccea15cd0de4ecbd5fe52638f20
SHA512

1993e43d2bfbe9c4f39db163d21b81b4fc40026fdbbfab0a568047c43b64347dd234f21d5f3026b810caab4de4c5b7f446ad0682e1f0c43dc6978c7faf8c4a6b
SSDEEP

12288:m1Eu4AZ+EOJTSNT8JpclOVgvcWS2LgHtJpXMKI1jdT5yRVhJUzIwX5+9NB8GYbnt:Y0GMG15eisLl74ZYS+/VRZN9

Score

10^/10

darkcomet 01 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

01

C2

hostme.no-ip.org:1604

Mutex

DC_MUTEX-MJWC85T

Attributes

InstallPath
MSDCSC\msdcsc.exe
gencode
kCB568SQFn2i
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

T1547.004

Modify Registry

T1112

Processes:

svchost.exe

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

svchost.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	svchost.exe

Executes dropped EXE 2 IoCs

Processes:

svchost.exemsdcsc.exe

pid process

4544 svchost.exe
3748 msdcsc.exe

pid	process
4544	svchost.exe
3748	msdcsc.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

3e30c9cbfed6311e5ebe149203bc4839.exesvchost.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\1 = "C:\\Users\\Admin\\AppData\\Roaming\\3e30c9cbfed6311e5ebe149203bc4839.exe"	3e30c9cbfed6311e5ebe149203bc4839.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Windows\\system32\\MSDCSC\\msdcsc.exe"	svchost.exe

Drops file in System32 directory 3 IoCs

Processes:

svchost.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	svchost.exe
File created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

3e30c9cbfed6311e5ebe149203bc4839.exe

description pid process target process

PID 1544 set thread context of 4544 1544 3e30c9cbfed6311e5ebe149203bc4839.exe svchost.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	pid	process	target process
PID 1544 set thread context of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

svchost.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	4544	svchost.exe
Token: SeSecurityPrivilege	4544	svchost.exe
Token: SeTakeOwnershipPrivilege	4544	svchost.exe
Token: SeLoadDriverPrivilege	4544	svchost.exe
Token: SeSystemProfilePrivilege	4544	svchost.exe
Token: SeSystemtimePrivilege	4544	svchost.exe
Token: SeProfSingleProcessPrivilege	4544	svchost.exe
Token: SeIncBasePriorityPrivilege	4544	svchost.exe
Token: SeCreatePagefilePrivilege	4544	svchost.exe
Token: SeBackupPrivilege	4544	svchost.exe
Token: SeRestorePrivilege	4544	svchost.exe
Token: SeShutdownPrivilege	4544	svchost.exe
Token: SeDebugPrivilege	4544	svchost.exe
Token: SeSystemEnvironmentPrivilege	4544	svchost.exe
Token: SeChangeNotifyPrivilege	4544	svchost.exe
Token: SeRemoteShutdownPrivilege	4544	svchost.exe
Token: SeUndockPrivilege	4544	svchost.exe
Token: SeManageVolumePrivilege	4544	svchost.exe
Token: SeImpersonatePrivilege	4544	svchost.exe
Token: SeCreateGlobalPrivilege	4544	svchost.exe
Token: 33	4544	svchost.exe
Token: 34	4544	svchost.exe
Token: 35	4544	svchost.exe
Token: 36	4544	svchost.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

3e30c9cbfed6311e5ebe149203bc4839.exesvchost.exe

description	pid	process	target process
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1544 wrote to memory of 4544	1544	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 4544 wrote to memory of 3748	4544	svchost.exe	msdcsc.exe
PID 4544 wrote to memory of 3748	4544	svchost.exe	msdcsc.exe
PID 4544 wrote to memory of 3748	4544	svchost.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\3e30c9cbfed6311e5ebe149203bc4839.exe
"C:\Users\Admin\AppData\Local\Temp\3e30c9cbfed6311e5ebe149203bc4839.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1544

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
2⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4544

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
"C:\Windows\system32\MSDCSC\msdcsc.exe"
1⤵
- Executes dropped EXE
PID:3748

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

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

Resource Development

Reconnaissance

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Downloads

memory/1544-1-0x00000000013D0000-0x00000000013E0000-memory.dmp

Filesize
64KB

Download
memory/1544-0-0x00000000747B0000-0x0000000074D61000-memory.dmp

Filesize
5.7MB

Download
memory/1544-13-0x00000000747B0000-0x0000000074D61000-memory.dmp

Filesize
5.7MB

Download
memory/4544-11-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/4544-14-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/4544-15-0x00000000025D0000-0x00000000025D1000-memory.dmp

Filesize
4KB

Download
memory/4544-27-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/4544-9-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/4544-6-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads