darkcomet | f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569

General

Target

f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe
Size

724KB
MD5

f517871829e8cbab778a5015d7b14afe
SHA1

056164b8b5ca5c2eaaca8fdbaccc13216232682e
SHA256

f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569
SHA512

b8502bb184b61ed098d3da5806f54405e9e542ccf8317bdef477ba538371f6acb58df03d155c282be5c417d0dd977614ad1befad3813505a82464fb71628c608
SSDEEP

12288:MBdaKTua5Jw4CZo+HLqY9fl0OLTyi9wG1D6avNfBaCRZqD02QcQXKcDq6Rgi//Kg:wrigKfnHLLXfGGMy4YcQXKcDq6Rg6/Kg

Score

10^/10

darkcomet slave evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Slave

C2

127.0.0.1:1604

Mutex

DC_MUTEX-94LKTR2

Attributes

gencode
PUyr7vQgVqSS
install
false
offline_keylogger
true
persistence
false

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Windows security bypass 2 TTPs 1 IoCs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112

Processes:

cvtres.exe

description ioc process

Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" cvtres.exe
Executes dropped EXE 1 IoCs

Processes:

explorer.exe

pid process

4532 explorer.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	cvtres.exe

pid	process
4532	explorer.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:

f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\18.exe = "C:\\Users\\Admin\\AppData\\RoamingMicrosoft\\System\\Services\\18.exe"	explorer.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

explorer.exe

description pid process target process

PID 4532 set thread context of 1032 4532 explorer.exe cvtres.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4532 set thread context of 1032	4532	explorer.exe	cvtres.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

Processes:

cvtres.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1032	cvtres.exe
Token: SeSecurityPrivilege	1032	cvtres.exe
Token: SeTakeOwnershipPrivilege	1032	cvtres.exe
Token: SeLoadDriverPrivilege	1032	cvtres.exe
Token: SeSystemProfilePrivilege	1032	cvtres.exe
Token: SeSystemtimePrivilege	1032	cvtres.exe
Token: SeProfSingleProcessPrivilege	1032	cvtres.exe
Token: SeIncBasePriorityPrivilege	1032	cvtres.exe
Token: SeCreatePagefilePrivilege	1032	cvtres.exe
Token: SeBackupPrivilege	1032	cvtres.exe
Token: SeRestorePrivilege	1032	cvtres.exe
Token: SeShutdownPrivilege	1032	cvtres.exe
Token: SeDebugPrivilege	1032	cvtres.exe
Token: SeSystemEnvironmentPrivilege	1032	cvtres.exe
Token: SeChangeNotifyPrivilege	1032	cvtres.exe
Token: SeRemoteShutdownPrivilege	1032	cvtres.exe
Token: SeUndockPrivilege	1032	cvtres.exe
Token: SeManageVolumePrivilege	1032	cvtres.exe
Token: SeImpersonatePrivilege	1032	cvtres.exe
Token: SeCreateGlobalPrivilege	1032	cvtres.exe
Token: 33	1032	cvtres.exe
Token: 34	1032	cvtres.exe
Token: 35	1032	cvtres.exe
Token: 36	1032	cvtres.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

cvtres.exe

pid process

1032 cvtres.exe

pid	process
1032	cvtres.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exeexplorer.exe

description	pid	process	target process
PID 4360 wrote to memory of 4532	4360	f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe	explorer.exe
PID 4360 wrote to memory of 4532	4360	f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe	explorer.exe
PID 4360 wrote to memory of 4532	4360	f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe	explorer.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe
PID 4532 wrote to memory of 1032	4532	explorer.exe	cvtres.exe

C:\Users\Admin\AppData\Local\Temp\f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe
"C:\Users\Admin\AppData\Local\Temp\f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4360

C:\Users\Admin\AppData\Roaming\explorer.exe
"C:\Users\Admin\AppData\Roaming\explorer.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4532

C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\cvtres.exe
3⤵
- Windows security bypass
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1032

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\explorer.exe
Filesize
724KB

MD5
f517871829e8cbab778a5015d7b14afe

SHA1
056164b8b5ca5c2eaaca8fdbaccc13216232682e

SHA256
f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569

SHA512
b8502bb184b61ed098d3da5806f54405e9e542ccf8317bdef477ba538371f6acb58df03d155c282be5c417d0dd977614ad1befad3813505a82464fb71628c608

Download Submit
C:\Users\Admin\AppData\Roaming\explorer.exe
Filesize
724KB

MD5
f517871829e8cbab778a5015d7b14afe

SHA1
056164b8b5ca5c2eaaca8fdbaccc13216232682e

SHA256
f33357da6977b1dad53c52c18710f84b58d48a1225848bcba3148e4a4f67b569

SHA512
b8502bb184b61ed098d3da5806f54405e9e542ccf8317bdef477ba538371f6acb58df03d155c282be5c417d0dd977614ad1befad3813505a82464fb71628c608

Download Submit
memory/1032-137-0x0000000000000000-mapping.dmp

Download
memory/1032-138-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1032-139-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1032-141-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1032-142-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1032-143-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/4360-132-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download
memory/4360-136-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download
memory/4532-133-0x0000000000000000-mapping.dmp

Download
memory/4532-140-0x00000000751A0000-0x0000000075751000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads