darkcomet | 9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
24/02/2025, 04:12

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General

Target
9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe
Size 1.1MB
Sample250224-espvxazjet
SHA256 9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22
MD5 971e273f808bae7da52ad62dbb050206
SHA1 78bebe22816e3fb380cbf0caa11776ff4b120686
SHA512 d47fb2a4c2627a1212ff7db3fb443e1b0739a561a82e588c3aff21a2db591ae1cddc2186c4915e180fcb8fc965e42fba3feeb5135d90388fe35a47f35403199e
SSDEEP 24576:umoO8itnTaZsZfZ8ARL28WcVNGAQnmMCL+tMEekEoKwsbovX:FleZsZfj2tcKALZm5ekEoKpkf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

darkcomet guest16 discovery persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

wwwgooglecom.sytes.net:2222

Mutex

WindowsSystem

Attributes

gencode
ur8y65YHfD6n
install
false
offline_keylogger
true
persistence
false

rc4.plain

Signatures

Darkcomet
DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.
trojan rat darkcomet
Darkcomet family
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-1-5-21-1874072718-2205492803-118941907-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, rundll32.exe C:\\Users\\Admin\\YxxYdyYQjJrjvZi\\YxxYdyYQjJrjvZi.dll Run"	rundll32.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000\Control Panel\International\Geo\Nation	9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe

Loads dropped DLL 3 IoCs

pid	Process
4748	rundll32.exe
4748	rundll32.exe
4748	rundll32.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4748 set thread context of 3384	4748	rundll32.exe	90

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 3 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000_Classes\Local Settings	9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe
Key created	\REGISTRY\USER\S-1-5-21-1874072718-2205492803-118941907-1000_Classes\Local Settings	OpenWith.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4748	rundll32.exe
4748	rundll32.exe

Suspicious use of AdjustPrivilegeToken 25 IoCs

description	pid	Process
Token: SeDebugPrivilege	4748	rundll32.exe
Token: SeIncreaseQuotaPrivilege	3384	RegAsm.exe
Token: SeSecurityPrivilege	3384	RegAsm.exe
Token: SeTakeOwnershipPrivilege	3384	RegAsm.exe
Token: SeLoadDriverPrivilege	3384	RegAsm.exe
Token: SeSystemProfilePrivilege	3384	RegAsm.exe
Token: SeSystemtimePrivilege	3384	RegAsm.exe
Token: SeProfSingleProcessPrivilege	3384	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3384	RegAsm.exe
Token: SeCreatePagefilePrivilege	3384	RegAsm.exe
Token: SeBackupPrivilege	3384	RegAsm.exe
Token: SeRestorePrivilege	3384	RegAsm.exe
Token: SeShutdownPrivilege	3384	RegAsm.exe
Token: SeDebugPrivilege	3384	RegAsm.exe
Token: SeSystemEnvironmentPrivilege	3384	RegAsm.exe
Token: SeChangeNotifyPrivilege	3384	RegAsm.exe
Token: SeRemoteShutdownPrivilege	3384	RegAsm.exe
Token: SeUndockPrivilege	3384	RegAsm.exe
Token: SeManageVolumePrivilege	3384	RegAsm.exe
Token: SeImpersonatePrivilege	3384	RegAsm.exe
Token: SeCreateGlobalPrivilege	3384	RegAsm.exe
Token: 33	3384	RegAsm.exe
Token: 34	3384	RegAsm.exe
Token: 35	3384	RegAsm.exe
Token: 36	3384	RegAsm.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4768	OpenWith.exe
3384	RegAsm.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 4748	4120	9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe	87
PID 4120 wrote to memory of 4748	4120	9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe	87
PID 4120 wrote to memory of 4748	4120	9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe	87
PID 4748 wrote to memory of 2668	4748	rundll32.exe	89
PID 4748 wrote to memory of 2668	4748	rundll32.exe	89
PID 4748 wrote to memory of 2668	4748	rundll32.exe	89
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90
PID 4748 wrote to memory of 3384	4748	rundll32.exe	90

C:\Users\Admin\AppData\Local\Temp\9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe
"C:\Users\Admin\AppData\Local\Temp\9fdbd2a7d21d38f8a1f2992d5a911d11670d745beb3b495153529818ec116e22.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\SysWOW64\rundll32.exe
  "C:\Windows\system32\rundll32.exe" C:\Users\Admin\YxxYdyYQjJrjvZi\YxxYdyYQjJrjvZi.dll Run
  2⤵
  - Modifies WinLogon for persistence
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4748
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    "\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
    3⤵
    PID:2668
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    "\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3384

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

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

Adobe_Acrobat_Reader.iso.torrent

Path C:\Users\Admin\YxxYdyYQjJrjvZi\Adobe_Acrobat_Reader.iso.torrent
Size 27KB
SHA256 63dfbd090392608811252e3068513c0510726fc6220f7a3ccc9e776a40a2a85f
MD5 8f7a9bbe57497bf7d14eef54a82db429
SHA1 31c8b1153bf71fbaab2ab9f4e217cae56ca85b42
SHA512 600aaaf9c89f07a5bd80633644ecb47eaf5efa8488336738ee4e934d07ac2b93afd5a0bf258abe48fa21e88f93688ad043eadae21753394da2d1316c8a875b20
SSDEEP 768:Vx2W3aMbVG1rOIbtLJ1fAbmlv8h3n8h2Dm3irKxaBkGg:Vx2W32gIb5JV2k8hX8TyaGg
MD5 SHA1 SHA512 SSDEEP

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YxxYdyYQjJrjvZi

Path C:\Users\Admin\YxxYdyYQjJrjvZi\YxxYdyYQjJrjvZi
Size 661KB
SHA256 9feb47b8fcab0e0316b0405004bc778f2d37723b4fdd01bd43b02d3edf56f23b
MD5 deffe3fe6f0542887a4a1c71db33061c
SHA1 12c2b538a2c14abbc489994c5f38fcc97869b2f4
SHA512 6c065dd8161644b9e3c6de3abeacdea0247dc4073f0c8026ccbcdac4affc297c32d924c4f6c3fb71dbcfd037f8e2d0edd42bbe28c5dcb9d5e51dafabf9f5ac83
SSDEEP 12288:+4AR3bLCroWcVNGXwQq3aZmMC3L+PcuByOTetaD3/Ao5HqRmsba:lARL28WcVNGAQnmMCL+tMEekEoKwsba
MD5 SHA1 SHA512 SSDEEP

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YxxYdyYQjJrjvZi.dll

Path C:\Users\Admin\YxxYdyYQjJrjvZi\YxxYdyYQjJrjvZi.dll
Size 47KB
SHA256 e336ecfedd9f6ed91589aa7e6866289e0d4673e1fa10dde53bf6957da148da36
MD5 eac27e10a0e5bcea94b35e7e1d952d22
SHA1 e0f32c04680dde525869a0bade537113c6dcbfdd
SHA512 b34d129ad6ab137edad8faac3bb4451aeec29d003dc83cb68c12e8cc19b73b9d6fa055766e5d54193d552e46cc858d7f498d70af04f6f8b5b9e9330aed7535db
SSDEEP 768:Zd5PgfgqiFQzfObUjLDyltg8ArINQAa/NieCC2ZhaDsV:NPfQ7ke6xArINQAdk2GIV
MD5 SHA1 SHA512 SSDEEP

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YxxYdyYQjJrjvZi.lnk

Path C:\Users\Admin\YxxYdyYQjJrjvZi\YxxYdyYQjJrjvZi.lnk
Size 804B
SHA256 fd61bf74397e8cb04d1810df6da6faebd1ad26630ddffd66d2df6d7acc5deac3
MD5 181e68d7417cc5005be1eb887a661538
SHA1 65e6bfd1b88a968bbec2a69832e7b987370effde
SHA512 c577aedf38e850aacdb83d6e59ff13b5b973bb13a7273e38374d51b2c4a06ad65298375ad3190a4472d34dcc02d400e8f07685c5744c74c94d808ecd8b1e35aa
MD5 SHA1 SHA512

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memory/3384-20-0x0000000000400000-0x00000000004B4000-memory.dmp

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memory/3384-24-0x0000000000400000-0x00000000004B4000-memory.dmp

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memory/3384-22-0x0000000000400000-0x00000000004B4000-memory.dmp

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memory/3384-25-0x0000000000400000-0x00000000004B4000-memory.dmp

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memory/3384-26-0x0000000000400000-0x00000000004B4000-memory.dmp

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memory/4748-13-0x00000000014D0000-0x00000000014E0000-memory.dmp

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memory/4748-14-0x0000000072C42000-0x0000000072C43000-memory.dmp

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