darkcomet | 864e6ddd9c09a95df11b80abbaa0b1a9a4fb890cb27ad21883f44853094bb0cd

General

Target

Purchase Order 781.exe
Size

2.0MB
MD5

701fbddfd06ee81cbdd5ef856389aca8
SHA1

f69315ab7caf73bd0d7ced899fdf2e619d3c474e
SHA256

864e6ddd9c09a95df11b80abbaa0b1a9a4fb890cb27ad21883f44853094bb0cd
SHA512

cdcadf2dcf3ba2fb640a00e8f9751d3c6f08c34a70c0ca441795ba9e59de3c323549b0180d7b940395f1d2800cda06672e2cb040257f0101eb521a2b43e7b0eb

Score

10^/10

darkcomet may 2021 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

May 2021

C2

bonding79.ddns.net:3316

goodgt79.ddns.net:3316

whatis79.ddns.net:3316

smath79.ddns.net:3316

jacknop79.ddns.net:3316

chrisle79.ddns.net:3316

Mutex

DC_MUTEX-PPMNGQA

Attributes

gencode
AUQYBsRj2TWk
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:

Purchase Order 781.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\k6l50Mr8Exu7gS7Z\\274Y8qipB5Sg.exe\",explorer.exe"	Purchase Order 781.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:

Purchase Order 781.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Purchase Order 781.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase Order 781.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:

Purchase Order 781.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Wine Purchase Order 781.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

Purchase Order 781.exe

description pid process target process

PID 488 set thread context of 412 488 Purchase Order 781.exe vbc.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Purchase Order 781.exe

pid process

488 Purchase Order 781.exe
488 Purchase Order 781.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Wine	Purchase Order 781.exe

description	pid	process	target process
PID 488 set thread context of 412	488	Purchase Order 781.exe	vbc.exe

pid	process
488	Purchase Order 781.exe
488	Purchase Order 781.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

Processes:

Purchase Order 781.exevbc.exe

description	pid	process
Token: SeDebugPrivilege	488	Purchase Order 781.exe
Token: SeDebugPrivilege	488	Purchase Order 781.exe
Token: SeIncreaseQuotaPrivilege	412	vbc.exe
Token: SeSecurityPrivilege	412	vbc.exe
Token: SeTakeOwnershipPrivilege	412	vbc.exe
Token: SeLoadDriverPrivilege	412	vbc.exe
Token: SeSystemProfilePrivilege	412	vbc.exe
Token: SeSystemtimePrivilege	412	vbc.exe
Token: SeProfSingleProcessPrivilege	412	vbc.exe
Token: SeIncBasePriorityPrivilege	412	vbc.exe
Token: SeCreatePagefilePrivilege	412	vbc.exe
Token: SeBackupPrivilege	412	vbc.exe
Token: SeRestorePrivilege	412	vbc.exe
Token: SeShutdownPrivilege	412	vbc.exe
Token: SeDebugPrivilege	412	vbc.exe
Token: SeSystemEnvironmentPrivilege	412	vbc.exe
Token: SeChangeNotifyPrivilege	412	vbc.exe
Token: SeRemoteShutdownPrivilege	412	vbc.exe
Token: SeUndockPrivilege	412	vbc.exe
Token: SeManageVolumePrivilege	412	vbc.exe
Token: SeImpersonatePrivilege	412	vbc.exe
Token: SeCreateGlobalPrivilege	412	vbc.exe
Token: 33	412	vbc.exe
Token: 34	412	vbc.exe
Token: 35	412	vbc.exe
Token: 36	412	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

412 vbc.exe

pid	process
412	vbc.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Purchase Order 781.exe

description	pid	process	target process
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe
PID 488 wrote to memory of 412	488	Purchase Order 781.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Order 781.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order 781.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:488

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:412

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

1

T1064

Persistence

Winlogon Helper DLL

1

T1004

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

1

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/412-116-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/412-117-0x000000000048F888-mapping.dmp

Download
memory/412-119-0x0000000002230000-0x0000000002231000-memory.dmp

Filesize
4KB

Download
memory/412-118-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/488-114-0x0000000000EA0000-0x0000000001300000-memory.dmp

Filesize
4.4MB

Download
memory/488-115-0x0000000004F00000-0x0000000004F01000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads