darkcomet | 0988c85492437167f5cef3d98c7313ac4c15ca9c765b89261fad0622bf61622f

General

Target

Payment 761.exe
Size

3.0MB
MD5

62a68863c4cc45f3044a82468175e2d8
SHA1

1872815154485c5f9af9cc93678bfa0da049d057
SHA256

0988c85492437167f5cef3d98c7313ac4c15ca9c765b89261fad0622bf61622f
SHA512

6328700abc7f907e4a56866698ff3249351ac07d0175a17ed6810a2a1b029aa7902b34b966518983830d7d2b193a5f950b634945d2588d18cafe26b1b5044508

Score

10^/10

darkcomet february 2021 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

FEBruary 2021

C2

chrisle79.ddns.net:3317

jacknop79.ddns.net:3317

smath79.ddns.net:3317

whatis79.ddns.net:3317

goodgt79.ddns.net:3317

bonding79.ddns.net:3317

Mutex

DC_MUTEX-X4WFYA8

Attributes

gencode
vYNzRAlAVaCD
install
false
offline_keylogger
true
password
Password20$
persistence
false

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

T1004

Modify Registry

T1112

Processes:

Payment 761.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\2WA5iVqHdZ35azk2\\eUN6xVlPHiNF.exe\",explorer.exe"	Payment 761.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Payment 761.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Payment 761.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Payment 761.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs
Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

Payment 761.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Wine Payment 761.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

Payment 761.exe

description pid process target process

PID 1888 set thread context of 324 1888 Payment 761.exe vbc.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Payment 761.exe

pid process

1888 Payment 761.exe
1888 Payment 761.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Wine	Payment 761.exe

description	pid	process	target process
PID 1888 set thread context of 324	1888	Payment 761.exe	vbc.exe

pid	process
1888	Payment 761.exe
1888	Payment 761.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

Processes:

Payment 761.exevbc.exe

description	pid	process
Token: SeDebugPrivilege	1888	Payment 761.exe
Token: SeDebugPrivilege	1888	Payment 761.exe
Token: SeIncreaseQuotaPrivilege	324	vbc.exe
Token: SeSecurityPrivilege	324	vbc.exe
Token: SeTakeOwnershipPrivilege	324	vbc.exe
Token: SeLoadDriverPrivilege	324	vbc.exe
Token: SeSystemProfilePrivilege	324	vbc.exe
Token: SeSystemtimePrivilege	324	vbc.exe
Token: SeProfSingleProcessPrivilege	324	vbc.exe
Token: SeIncBasePriorityPrivilege	324	vbc.exe
Token: SeCreatePagefilePrivilege	324	vbc.exe
Token: SeBackupPrivilege	324	vbc.exe
Token: SeRestorePrivilege	324	vbc.exe
Token: SeShutdownPrivilege	324	vbc.exe
Token: SeDebugPrivilege	324	vbc.exe
Token: SeSystemEnvironmentPrivilege	324	vbc.exe
Token: SeChangeNotifyPrivilege	324	vbc.exe
Token: SeRemoteShutdownPrivilege	324	vbc.exe
Token: SeUndockPrivilege	324	vbc.exe
Token: SeManageVolumePrivilege	324	vbc.exe
Token: SeImpersonatePrivilege	324	vbc.exe
Token: SeCreateGlobalPrivilege	324	vbc.exe
Token: 33	324	vbc.exe
Token: 34	324	vbc.exe
Token: 35	324	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

324 vbc.exe

pid	process
324	vbc.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Payment 761.exe

description	pid	process	target process
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe
PID 1888 wrote to memory of 324	1888	Payment 761.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\Payment 761.exe
"C:\Users\Admin\AppData\Local\Temp\Payment 761.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1888

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:324

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Virtualization/Sandbox Evasion

2

T1497

Scripting

1

T1064

Credential Access

Discovery

Query Registry

3

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/324-5-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/324-6-0x000000000048F888-mapping.dmp

Download
memory/324-8-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/324-9-0x0000000000250000-0x0000000000251000-memory.dmp

Filesize
4KB

Download
memory/1888-2-0x0000000075781000-0x0000000075783000-memory.dmp

Filesize
8KB

Download
memory/1888-4-0x0000000004A20000-0x0000000004A21000-memory.dmp

Filesize
4KB

Download
memory/1888-3-0x0000000000082000-0x000000000010E000-memory.dmp

Filesize
560KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads