darkcomet | 7559e6ca8b77400f88bf4e67208a1c32570a670068eccae9e3d226cc5471bd47

Analysis

max time kernel
150s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 06:30

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General

Target

bazaar.2020.02/Backdoor.Win32.Delf.exe
Size

253KB
MD5

94d715c76354182482dcc8fb446a1be7
SHA1

3d6497669c371e33c2e4055f9eb8c00dc5104387
SHA256

a2f4d3da25e52d88eafb7a7da242e9bb507fe4626af58ca3b8c1a13e391c2000
SHA512

e85e1ae231318c403a3aea0af312f587abbf55392fb8677543e363d9245054a939ad635a0094c0884b01f2e0171eb2919b43c556b472724bb103637cee206965
SSDEEP

6144:nD7cY2fgssM7Wirg9KXylmRiL+QMeC/i6isqX7UovnONztByipwxZbNW:nl8E4w5huat7UovONzbXwg

Score

10^/10

darkcomet mikel_04 discovery evasion persistence rat trojan upx

Malware Config

Extracted

Family

darkcomet

Botnet

Mikel_04

ventoclima.hopto.org:8678

Mutex

DC_MUTEX-J9C4X34

Attributes

InstallPath
Temp\Taskmgrk.exe
gencode
mn82vWE9luVq
install
true
offline_keylogger
true
password
Mikel2019
persistence
true
reg_key
taskmgrk

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

Processes:

Backdoor.Win32.Delf.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Local\\Temp\\Temp\\Taskmgrk.exe"	Backdoor.Win32.Delf.exe

Modifies security service 2 TTPs 1 IoCs
evasion

Modify Registry
T1112

Windows Service
T1543.003

Processes:

Taskmgrk.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" Taskmgrk.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4"	Taskmgrk.exe

Windows security bypass 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

Taskmgrk.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	Taskmgrk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	Taskmgrk.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Backdoor.Win32.Delf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	Backdoor.Win32.Delf.exe

Executes dropped EXE 1 IoCs

Processes:

Taskmgrk.exe

pid process

1196 Taskmgrk.exe

pid	process
1196	Taskmgrk.exe

UPX packed file 16 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral10/memory/2856-0-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\Temp\Taskmgrk.exe	upx
behavioral10/memory/2856-64-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-63-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-66-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-67-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-68-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-69-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-70-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-71-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-72-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-74-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-76-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-77-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-78-0x0000000000400000-0x00000000004BA000-memory.dmp	upx
behavioral10/memory/1196-79-0x0000000000400000-0x00000000004BA000-memory.dmp	upx

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

Taskmgrk.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1"	Taskmgrk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1"	Taskmgrk.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Backdoor.Win32.Delf.exeTaskmgrk.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskmgrk = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Temp\\Taskmgrk.exe"	Backdoor.Win32.Delf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskmgrk = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Temp\\Taskmgrk.exe"	Taskmgrk.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

Backdoor.Win32.Delf.exeTaskmgrk.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Backdoor.Win32.Delf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Taskmgrk.exe

Modifies registry class 1 IoCs

Processes:

Backdoor.Win32.Delf.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Backdoor.Win32.Delf.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

Processes:

Backdoor.Win32.Delf.exeTaskmgrk.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeSecurityPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeTakeOwnershipPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeLoadDriverPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeSystemProfilePrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeSystemtimePrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeProfSingleProcessPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeIncBasePriorityPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeCreatePagefilePrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeBackupPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeRestorePrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeShutdownPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeDebugPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeSystemEnvironmentPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeChangeNotifyPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeRemoteShutdownPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeUndockPrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeManageVolumePrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeImpersonatePrivilege	2856	Backdoor.Win32.Delf.exe
Token: SeCreateGlobalPrivilege	2856	Backdoor.Win32.Delf.exe
Token: 33	2856	Backdoor.Win32.Delf.exe
Token: 34	2856	Backdoor.Win32.Delf.exe
Token: 35	2856	Backdoor.Win32.Delf.exe
Token: 36	2856	Backdoor.Win32.Delf.exe
Token: SeIncreaseQuotaPrivilege	1196	Taskmgrk.exe
Token: SeSecurityPrivilege	1196	Taskmgrk.exe
Token: SeTakeOwnershipPrivilege	1196	Taskmgrk.exe
Token: SeLoadDriverPrivilege	1196	Taskmgrk.exe
Token: SeSystemProfilePrivilege	1196	Taskmgrk.exe
Token: SeSystemtimePrivilege	1196	Taskmgrk.exe
Token: SeProfSingleProcessPrivilege	1196	Taskmgrk.exe
Token: SeIncBasePriorityPrivilege	1196	Taskmgrk.exe
Token: SeCreatePagefilePrivilege	1196	Taskmgrk.exe
Token: SeBackupPrivilege	1196	Taskmgrk.exe
Token: SeRestorePrivilege	1196	Taskmgrk.exe
Token: SeShutdownPrivilege	1196	Taskmgrk.exe
Token: SeDebugPrivilege	1196	Taskmgrk.exe
Token: SeSystemEnvironmentPrivilege	1196	Taskmgrk.exe
Token: SeChangeNotifyPrivilege	1196	Taskmgrk.exe
Token: SeRemoteShutdownPrivilege	1196	Taskmgrk.exe
Token: SeUndockPrivilege	1196	Taskmgrk.exe
Token: SeManageVolumePrivilege	1196	Taskmgrk.exe
Token: SeImpersonatePrivilege	1196	Taskmgrk.exe
Token: SeCreateGlobalPrivilege	1196	Taskmgrk.exe
Token: 33	1196	Taskmgrk.exe
Token: 34	1196	Taskmgrk.exe
Token: 35	1196	Taskmgrk.exe
Token: 36	1196	Taskmgrk.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Taskmgrk.exe

pid process

1196 Taskmgrk.exe

pid	process
1196	Taskmgrk.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

Backdoor.Win32.Delf.exe

description	pid	process	target process
PID 2856 wrote to memory of 1196	2856	Backdoor.Win32.Delf.exe	Taskmgrk.exe
PID 2856 wrote to memory of 1196	2856	Backdoor.Win32.Delf.exe	Taskmgrk.exe
PID 2856 wrote to memory of 1196	2856	Backdoor.Win32.Delf.exe	Taskmgrk.exe

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

T1112

Processes:

Taskmgrk.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern	Taskmgrk.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion\Explorern\NoControlPanel = "1"	Taskmgrk.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CurrentVersion	Taskmgrk.exe

C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.Win32.Delf.exe
"C:\Users\Admin\AppData\Local\Temp\bazaar.2020.02\Backdoor.Win32.Delf.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Users\Admin\AppData\Local\Temp\Temp\Taskmgrk.exe
  "C:\Users\Admin\AppData\Local\Temp\Temp\Taskmgrk.exe"
  2⤵
  - Modifies security service
  - Windows security bypass
  - Executes dropped EXE
  - Windows security modification
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:1196

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 --field-trial-handle=4436,i,6510295916244954942,10164894160290787457,262144 --variations-seed-version --mojo-platform-channel-handle=3828 /prefetch:8
1⤵
PID:1672

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Temp\Taskmgrk.exe

Filesize
253KB

MD5
94d715c76354182482dcc8fb446a1be7

SHA1
3d6497669c371e33c2e4055f9eb8c00dc5104387

SHA256
a2f4d3da25e52d88eafb7a7da242e9bb507fe4626af58ca3b8c1a13e391c2000

SHA512
e85e1ae231318c403a3aea0af312f587abbf55392fb8677543e363d9245054a939ad635a0094c0884b01f2e0171eb2919b43c556b472724bb103637cee206965

Download Submit
memory/1196-68-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-65-0x0000000000690000-0x0000000000691000-memory.dmp

Filesize
4KB

Download
memory/1196-69-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-63-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-70-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-66-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-67-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-71-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-79-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-78-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-77-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-72-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-74-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/1196-76-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2856-0-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download
memory/2856-1-0x00000000026D0000-0x00000000026D1000-memory.dmp

Filesize
4KB

Download
memory/2856-64-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download