darkcomet | b81dece72c020fa2cb5f5df57f71de84142574d54ef1a165aff47ec171b618d0

General

Target

Payment 901.exe
Size

3.0MB
MD5

33d9370ab0c06bea92774b43d138f5b3
SHA1

cba894efb96a1ae3982a10363814366b478c39d7
SHA256

b81dece72c020fa2cb5f5df57f71de84142574d54ef1a165aff47ec171b618d0
SHA512

573b5a9331b28ef6aaeaef616a89a05c70d478510141e636614f1dabfae290710cf620811dec90c8bcae3fc78ed26a6c4b317bbc08256cc4626ce7675ec3f7be

Score

10^/10

darkcomet january 2021 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

JANuary 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-X1VW1F7

Attributes

gencode
U35l73tWGu8y
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 901.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\Uhj6qmCFUPxUc9qJ\\5tbiU0l1xwLC.exe\",explorer.exe"	Payment 901.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 901.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Payment 901.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Payment 901.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 901.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Wine Payment 901.exe
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

Payment 901.exe

description pid process target process

PID 1036 set thread context of 3400 1036 Payment 901.exe vbc.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

Payment 901.exe

pid process

1036 Payment 901.exe
1036 Payment 901.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Wine	Payment 901.exe

description	pid	process	target process
PID 1036 set thread context of 3400	1036	Payment 901.exe	vbc.exe

pid	process
1036	Payment 901.exe
1036	Payment 901.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

Processes:

Payment 901.exevbc.exe

description	pid	process
Token: SeDebugPrivilege	1036	Payment 901.exe
Token: SeDebugPrivilege	1036	Payment 901.exe
Token: SeIncreaseQuotaPrivilege	3400	vbc.exe
Token: SeSecurityPrivilege	3400	vbc.exe
Token: SeTakeOwnershipPrivilege	3400	vbc.exe
Token: SeLoadDriverPrivilege	3400	vbc.exe
Token: SeSystemProfilePrivilege	3400	vbc.exe
Token: SeSystemtimePrivilege	3400	vbc.exe
Token: SeProfSingleProcessPrivilege	3400	vbc.exe
Token: SeIncBasePriorityPrivilege	3400	vbc.exe
Token: SeCreatePagefilePrivilege	3400	vbc.exe
Token: SeBackupPrivilege	3400	vbc.exe
Token: SeRestorePrivilege	3400	vbc.exe
Token: SeShutdownPrivilege	3400	vbc.exe
Token: SeDebugPrivilege	3400	vbc.exe
Token: SeSystemEnvironmentPrivilege	3400	vbc.exe
Token: SeChangeNotifyPrivilege	3400	vbc.exe
Token: SeRemoteShutdownPrivilege	3400	vbc.exe
Token: SeUndockPrivilege	3400	vbc.exe
Token: SeManageVolumePrivilege	3400	vbc.exe
Token: SeImpersonatePrivilege	3400	vbc.exe
Token: SeCreateGlobalPrivilege	3400	vbc.exe
Token: 33	3400	vbc.exe
Token: 34	3400	vbc.exe
Token: 35	3400	vbc.exe
Token: 36	3400	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

3400 vbc.exe

pid	process
3400	vbc.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

Payment 901.exe

description	pid	process	target process
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe
PID 1036 wrote to memory of 3400	1036	Payment 901.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\Payment 901.exe
"C:\Users\Admin\AppData\Local\Temp\Payment 901.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:1036

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:3400

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/3400-2-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download
memory/3400-3-0x000000000048F888-mapping.dmp

Download
memory/3400-4-0x0000000000400000-0x00000000004B2000-memory.dmp

Filesize
712KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads