darkcomet | c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a

General

Target

c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe
Size

389KB
MD5

eae6b37b6242cdeba60fd04f4d09dc8b
SHA1

2a487a88a9a8f3663ed0f2a5d562af424b7bff21
SHA256

c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a
SHA512

76a69134b147535e88a7b58f59cd19efa0711f64181b0b0feff657ba993a2e33c4084ed6cd4728646403f4c7762afe47b4b031ddd0fb47085c27f859393e7c3d
SSDEEP

6144:XEk6v38qdv4A9sE2bLutpL9v++JQegpbtKHWIhQFLfjWUkgd2d2NTAreVRcNoO:XEJ8qdgAIuwY/mcQxfjWUPFNcr0J

Score

10^/10

darkcomet guest16 persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

nicksrat.no-ip.biz:1604

Mutex

DC_MUTEX-H7FLLF9

Attributes

gencode
t4wBhiJiyE7T
install
false
offline_keylogger
true
persistence
false

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet

Executes dropped EXE 1 IoCs

pid	Process
4708	vbc.exe

UPX packed file 7 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4708-134-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4708-137-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4708-138-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4708-140-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4708-142-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4708-143-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral2/memory/4708-144-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WinUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\WinUpdtr\\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe"	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4448 set thread context of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79

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 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4708	vbc.exe
Token: SeSecurityPrivilege	4708	vbc.exe
Token: SeTakeOwnershipPrivilege	4708	vbc.exe
Token: SeLoadDriverPrivilege	4708	vbc.exe
Token: SeSystemProfilePrivilege	4708	vbc.exe
Token: SeSystemtimePrivilege	4708	vbc.exe
Token: SeProfSingleProcessPrivilege	4708	vbc.exe
Token: SeIncBasePriorityPrivilege	4708	vbc.exe
Token: SeCreatePagefilePrivilege	4708	vbc.exe
Token: SeBackupPrivilege	4708	vbc.exe
Token: SeRestorePrivilege	4708	vbc.exe
Token: SeShutdownPrivilege	4708	vbc.exe
Token: SeDebugPrivilege	4708	vbc.exe
Token: SeSystemEnvironmentPrivilege	4708	vbc.exe
Token: SeChangeNotifyPrivilege	4708	vbc.exe
Token: SeRemoteShutdownPrivilege	4708	vbc.exe
Token: SeUndockPrivilege	4708	vbc.exe
Token: SeManageVolumePrivilege	4708	vbc.exe
Token: SeImpersonatePrivilege	4708	vbc.exe
Token: SeCreateGlobalPrivilege	4708	vbc.exe
Token: 33	4708	vbc.exe
Token: 34	4708	vbc.exe
Token: 35	4708	vbc.exe
Token: 36	4708	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4708	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79
PID 4448 wrote to memory of 4708	4448	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	79

C:\Users\Admin\AppData\Local\Temp\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe
"C:\Users\Admin\AppData\Local\Temp\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4448
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4708

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\vbc.exe

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/4448-132-0x0000000074D20000-0x00000000752D1000-memory.dmp

Filesize
5.7MB

Download
memory/4448-141-0x0000000074D20000-0x00000000752D1000-memory.dmp

Filesize
5.7MB

Download
memory/4708-134-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4708-137-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4708-138-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4708-140-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4708-142-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4708-143-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/4708-144-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download

Analysis

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