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

Executes dropped EXE 2 IoCs

Processes:

svchost.exemsdcsc.exe

pid process

2360 svchost.exe
2852 msdcsc.exe
Loads dropped DLL 2 IoCs

Processes:

3e30c9cbfed6311e5ebe149203bc4839.exesvchost.exe

pid process

1696 3e30c9cbfed6311e5ebe149203bc4839.exe
2360 svchost.exe

pid	process
2360	svchost.exe
2852	msdcsc.exe

pid	process
1696	3e30c9cbfed6311e5ebe149203bc4839.exe
2360	svchost.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-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Windows\CurrentVersion\Run\1 = "C:\\Users\\Admin\\AppData\\Roaming\\3e30c9cbfed6311e5ebe149203bc4839.exe"	3e30c9cbfed6311e5ebe149203bc4839.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\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 created	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\msdcsc.exe	svchost.exe
File opened for modification	C:\Windows\SysWOW64\MSDCSC\	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

3e30c9cbfed6311e5ebe149203bc4839.exe

description pid process target process

PID 1696 set thread context of 2360 1696 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 1696 set thread context of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

Processes:

svchost.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2360	svchost.exe
Token: SeSecurityPrivilege	2360	svchost.exe
Token: SeTakeOwnershipPrivilege	2360	svchost.exe
Token: SeLoadDriverPrivilege	2360	svchost.exe
Token: SeSystemProfilePrivilege	2360	svchost.exe
Token: SeSystemtimePrivilege	2360	svchost.exe
Token: SeProfSingleProcessPrivilege	2360	svchost.exe
Token: SeIncBasePriorityPrivilege	2360	svchost.exe
Token: SeCreatePagefilePrivilege	2360	svchost.exe
Token: SeBackupPrivilege	2360	svchost.exe
Token: SeRestorePrivilege	2360	svchost.exe
Token: SeShutdownPrivilege	2360	svchost.exe
Token: SeDebugPrivilege	2360	svchost.exe
Token: SeSystemEnvironmentPrivilege	2360	svchost.exe
Token: SeChangeNotifyPrivilege	2360	svchost.exe
Token: SeRemoteShutdownPrivilege	2360	svchost.exe
Token: SeUndockPrivilege	2360	svchost.exe
Token: SeManageVolumePrivilege	2360	svchost.exe
Token: SeImpersonatePrivilege	2360	svchost.exe
Token: SeCreateGlobalPrivilege	2360	svchost.exe
Token: 33	2360	svchost.exe
Token: 34	2360	svchost.exe
Token: 35	2360	svchost.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

3e30c9cbfed6311e5ebe149203bc4839.exesvchost.exe

description	pid	process	target process
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 1696 wrote to memory of 2360	1696	3e30c9cbfed6311e5ebe149203bc4839.exe	svchost.exe
PID 2360 wrote to memory of 2852	2360	svchost.exe	msdcsc.exe
PID 2360 wrote to memory of 2852	2360	svchost.exe	msdcsc.exe
PID 2360 wrote to memory of 2852	2360	svchost.exe	msdcsc.exe
PID 2360 wrote to memory of 2852	2360	svchost.exe	msdcsc.exe

C:\Users\Admin\AppData\Local\Temp\3e30c9cbfed6311e5ebe149203bc4839.exe
"C:\Users\Admin\AppData\Local\Temp\3e30c9cbfed6311e5ebe149203bc4839.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1696

C:\Users\Admin\AppData\Local\Temp\svchost.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
2⤵
- Modifies WinLogon for persistence
- Executes dropped EXE
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2360

C:\Windows\SysWOW64\MSDCSC\msdcsc.exe
"C:\Windows\system32\MSDCSC\msdcsc.exe"
1⤵
- Executes dropped EXE
PID:2852

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1696-30-0x0000000074950000-0x0000000074EFB000-memory.dmp

Filesize
5.7MB

Download
memory/1696-2-0x0000000074950000-0x0000000074EFB000-memory.dmp

Filesize
5.7MB

Download
memory/1696-0-0x0000000074950000-0x0000000074EFB000-memory.dmp

Filesize
5.7MB

Download
memory/1696-1-0x0000000002330000-0x0000000002370000-memory.dmp

Filesize
256KB

Download
memory/2360-29-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-22-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-31-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-41-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2360-28-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-26-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-32-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/2360-20-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-18-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-16-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-14-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-12-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-9-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download
memory/2360-11-0x0000000000400000-0x00000000004CD000-memory.dmp

Filesize
820KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads