darkcomet | c4b097bc656b3b9448265965f30e52ef65a52e7f80b103c8c341e20c421b0393

Analysis

max time kernel
150s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
02/04/2024, 13:53

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General

Target
2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe
Size 3.1MB
Sample240402-q699jscc2s
SHA256 2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117
MD5 82b07527bc6f9a9adbe2430797584797
SHA1 7e89854829579b0b537f68690a36bb80f629da0d
SHA512 56294fef78dd1120b47d3a3535f63ea50fafd07cf2d1769712adfdb644e6ad91439b51b6ee758f78e9f1c1d5475065d867a17824086934e298f125292eeae085
SSDEEP 49152:eeI6HeXz8zQvQvNx5RaWBYCH+reXtHNYWatoGNqfQzZJ1oDpOzRx:eeIseD85x5RaWBfH+re9HNYJewz
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet september 2023 evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

September 2023

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-UZKN5K0

Attributes

gencode
wEEnKBEF7keh
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

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "\"C:\\Users\\Admin\\AppData\\Roaming\\7TUCh0fpSXo11BA1\\GoAxgzJeqfNY.exe\",explorer.exe"	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe

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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\Software\Wine	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4788 set thread context of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe
4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe

Suspicious use of AdjustPrivilegeToken 26 IoCs

description	pid	Process
Token: SeDebugPrivilege	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe
Token: SeDebugPrivilege	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe
Token: SeIncreaseQuotaPrivilege	4832	vbc.exe
Token: SeSecurityPrivilege	4832	vbc.exe
Token: SeTakeOwnershipPrivilege	4832	vbc.exe
Token: SeLoadDriverPrivilege	4832	vbc.exe
Token: SeSystemProfilePrivilege	4832	vbc.exe
Token: SeSystemtimePrivilege	4832	vbc.exe
Token: SeProfSingleProcessPrivilege	4832	vbc.exe
Token: SeIncBasePriorityPrivilege	4832	vbc.exe
Token: SeCreatePagefilePrivilege	4832	vbc.exe
Token: SeBackupPrivilege	4832	vbc.exe
Token: SeRestorePrivilege	4832	vbc.exe
Token: SeShutdownPrivilege	4832	vbc.exe
Token: SeDebugPrivilege	4832	vbc.exe
Token: SeSystemEnvironmentPrivilege	4832	vbc.exe
Token: SeChangeNotifyPrivilege	4832	vbc.exe
Token: SeRemoteShutdownPrivilege	4832	vbc.exe
Token: SeUndockPrivilege	4832	vbc.exe
Token: SeManageVolumePrivilege	4832	vbc.exe
Token: SeImpersonatePrivilege	4832	vbc.exe
Token: SeCreateGlobalPrivilege	4832	vbc.exe
Token: 33	4832	vbc.exe
Token: 34	4832	vbc.exe
Token: 35	4832	vbc.exe
Token: 36	4832	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4832	vbc.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105
PID 4788 wrote to memory of 4832	4788	2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe	105

C:\Users\Admin\AppData\Local\Temp\2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe
"C:\Users\Admin\AppData\Local\Temp\2b0a7d21e0a19d275e1b9a6b357b38e610040e5597753beac81caddc7a262117.exe"
1⤵
- Modifies WinLogon for persistence
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- 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:4788
- 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:4832

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4104 --field-trial-handle=2228,i,8155065313278028490,17854605419281052753,262144 --variations-seed-version /prefetch:8
1⤵
PID:2368

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4788-17-0x0000000000A60000-0x0000000000D8C000-memory.dmp

Download

memory/4788-1-0x0000000000A60000-0x0000000000D8C000-memory.dmp

Download

memory/4788-2-0x0000000074410000-0x00000000749C1000-memory.dmp

Download

memory/4788-3-0x0000000005280000-0x0000000005290000-memory.dmp

Download

memory/4788-4-0x0000000074410000-0x00000000749C1000-memory.dmp

Download

memory/4788-5-0x0000000074410000-0x00000000749C1000-memory.dmp

Download

memory/4788-0-0x0000000000A60000-0x0000000000D8C000-memory.dmp

Download

memory/4788-23-0x0000000074410000-0x00000000749C1000-memory.dmp

Download

memory/4788-22-0x0000000005280000-0x0000000005290000-memory.dmp

Download

memory/4788-20-0x0000000074410000-0x00000000749C1000-memory.dmp

Download

memory/4788-19-0x0000000000A60000-0x0000000000D8C000-memory.dmp

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memory/4832-8-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-9-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-14-0x0000000000400000-0x00000000004B2000-memory.dmp

Download

memory/4832-18-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-13-0x0000000002260000-0x0000000002261000-memory.dmp

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memory/4832-12-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-11-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-15-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-26-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-30-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-34-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-40-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-44-0x0000000000400000-0x00000000004B2000-memory.dmp

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memory/4832-48-0x0000000000400000-0x00000000004B2000-memory.dmp

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