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
1032	vbc.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1032-58-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-60-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-61-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-65-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-67-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-68-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-69-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-70-0x0000000000400000-0x00000000004B5000-memory.dmp	upx
behavioral1/memory/1032-71-0x0000000000400000-0x00000000004B5000-memory.dmp	upx

Loads dropped DLL 1 IoCs

pid	Process
884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe

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-1-5-21-2292972927-2705560509-2768824231-1000\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 884 set thread context of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27

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 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	1032	vbc.exe
Token: SeSecurityPrivilege	1032	vbc.exe
Token: SeTakeOwnershipPrivilege	1032	vbc.exe
Token: SeLoadDriverPrivilege	1032	vbc.exe
Token: SeSystemProfilePrivilege	1032	vbc.exe
Token: SeSystemtimePrivilege	1032	vbc.exe
Token: SeProfSingleProcessPrivilege	1032	vbc.exe
Token: SeIncBasePriorityPrivilege	1032	vbc.exe
Token: SeCreatePagefilePrivilege	1032	vbc.exe
Token: SeBackupPrivilege	1032	vbc.exe
Token: SeRestorePrivilege	1032	vbc.exe
Token: SeShutdownPrivilege	1032	vbc.exe
Token: SeDebugPrivilege	1032	vbc.exe
Token: SeSystemEnvironmentPrivilege	1032	vbc.exe
Token: SeChangeNotifyPrivilege	1032	vbc.exe
Token: SeRemoteShutdownPrivilege	1032	vbc.exe
Token: SeUndockPrivilege	1032	vbc.exe
Token: SeManageVolumePrivilege	1032	vbc.exe
Token: SeImpersonatePrivilege	1032	vbc.exe
Token: SeCreateGlobalPrivilege	1032	vbc.exe
Token: 33	1032	vbc.exe
Token: 34	1032	vbc.exe
Token: 35	1032	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1032	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27
PID 884 wrote to memory of 1032	884	c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe	27

C:\Users\Admin\AppData\Local\Temp\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe
"C:\Users\Admin\AppData\Local\Temp\c8235cf09120c1bf9a5c6caf885c1784178e4c30e9eef2d274902b32e0fc265a.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:884
- 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:1032

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
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

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

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/884-55-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/884-64-0x0000000074460000-0x0000000074A0B000-memory.dmp

Filesize
5.7MB

Download
memory/884-54-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download
memory/1032-58-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-61-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-60-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-65-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-57-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-67-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-68-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-69-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-70-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download
memory/1032-71-0x0000000000400000-0x00000000004B5000-memory.dmp

Filesize
724KB

Download

Analysis

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