darkcomet | b6191c6a038f6d49e6941f00ded6a45cf3050ff0a2ecea3a3b3b462dc580f352

General

Target

Purchase Order 461.exe
Size

2.0MB
MD5

f88cdbcb740a75972cfef27692239991
SHA1

fcdaed8c771069c111afb78bd1d2ebaeb28a6688
SHA256

b6191c6a038f6d49e6941f00ded6a45cf3050ff0a2ecea3a3b3b462dc580f352
SHA512

44265899cd6915a0c637496598b1110f81a3a1a42d5c2c77137bb7745663335f0dc48fa184632226d18294da23a354780009386d6dd6613ad605b5021ff1d8b3

Score

10^/10

darkcomet september 2021 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

SeptemBER 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-6JQTXC0

Attributes

gencode
cVaduGzs7zFu
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 461.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\\yISM0wdU8nvQZS6R\\CqJusqyiQLsJ.exe\",explorer.exe"	Purchase Order 461.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 461.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Purchase Order 461.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase Order 461.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 461.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Wine Purchase Order 461.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

Purchase Order 461.exe

description pid process target process

PID 632 set thread context of 1296 632 Purchase Order 461.exe vbc.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Purchase Order 461.exe

pid process

632 Purchase Order 461.exe
632 Purchase Order 461.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Wine	Purchase Order 461.exe

description	pid	process	target process
PID 632 set thread context of 1296	632	Purchase Order 461.exe	vbc.exe

pid	process
632	Purchase Order 461.exe
632	Purchase Order 461.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

Processes:

Purchase Order 461.exevbc.exe

description	pid	process
Token: SeDebugPrivilege	632	Purchase Order 461.exe
Token: SeDebugPrivilege	632	Purchase Order 461.exe
Token: SeIncreaseQuotaPrivilege	1296	vbc.exe
Token: SeSecurityPrivilege	1296	vbc.exe
Token: SeTakeOwnershipPrivilege	1296	vbc.exe
Token: SeLoadDriverPrivilege	1296	vbc.exe
Token: SeSystemProfilePrivilege	1296	vbc.exe
Token: SeSystemtimePrivilege	1296	vbc.exe
Token: SeProfSingleProcessPrivilege	1296	vbc.exe
Token: SeIncBasePriorityPrivilege	1296	vbc.exe
Token: SeCreatePagefilePrivilege	1296	vbc.exe
Token: SeBackupPrivilege	1296	vbc.exe
Token: SeRestorePrivilege	1296	vbc.exe
Token: SeShutdownPrivilege	1296	vbc.exe
Token: SeDebugPrivilege	1296	vbc.exe
Token: SeSystemEnvironmentPrivilege	1296	vbc.exe
Token: SeChangeNotifyPrivilege	1296	vbc.exe
Token: SeRemoteShutdownPrivilege	1296	vbc.exe
Token: SeUndockPrivilege	1296	vbc.exe
Token: SeManageVolumePrivilege	1296	vbc.exe
Token: SeImpersonatePrivilege	1296	vbc.exe
Token: SeCreateGlobalPrivilege	1296	vbc.exe
Token: 33	1296	vbc.exe
Token: 34	1296	vbc.exe
Token: 35	1296	vbc.exe
Token: 36	1296	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

1296 vbc.exe

pid	process
1296	vbc.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Purchase Order 461.exe

description	pid	process	target process
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe
PID 632 wrote to memory of 1296	632	Purchase Order 461.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Order 461.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order 461.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:632

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:1296

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

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Downloads

memory/632-114-0x0000000000990000-0x0000000000DE0000-memory.dmp

Filesize
4.3MB

Download
memory/632-115-0x00000000051E0000-0x00000000051E1000-memory.dmp

Filesize
4KB

Download
memory/1296-116-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1296-117-0x000000000048F888-mapping.dmp

Download
memory/1296-118-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/1296-119-0x0000000000790000-0x0000000000791000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads