darkcomet | dc712109e28e6135df55071d9b83127fdf6b946c0ec99d48cfcf723c9ba9ebcd

Analysis

max time kernel
149s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-04-2024 11:56

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General

Target

ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe
Size

440KB
MD5

ff38fb89c4a9826d259d62c659caf13a
SHA1

476261ad1e841e211f6ae7d5b32eb961a8ebb701
SHA256

dc712109e28e6135df55071d9b83127fdf6b946c0ec99d48cfcf723c9ba9ebcd
SHA512

7e35455014c212fed72bbcf28f0a8f208361300d4a213aab4f05f226c6117c2be8fab10ef0e05b20894148b5e9ba7040668b17af73ac9e166d8a6d1f4f49eb38
SSDEEP

6144:K9qROWGtGSJLg/Ud0QjyIb7V6onNXmHIBGIwkmBbGzqSdlVVngwYcV9U:DROzk0Md1Y2oNwkmozqSdDVngx

Score

10^/10

darkcomet persistence rat trojan upx

Malware Config

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:

cdpjxV1A8WDL8VQ58D6.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windupdt\\winupdate.exe"	cdpjxV1A8WDL8VQ58D6.exe

Checks BIOS information in registry 2 TTPs 3 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

winupdate.exeexplorer.execdpjxV1A8WDL8VQ58D6.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosDate	cdpjxV1A8WDL8VQ58D6.exe

Executes dropped EXE 2 IoCs

Processes:

cdpjxV1A8WDL8VQ58D6.exewinupdate.exe

pid	Process
2588	cdpjxV1A8WDL8VQ58D6.exe
2752	winupdate.exe

Loads dropped DLL 4 IoCs

Processes:

cdpjxV1A8WDL8VQ58D6.exewinupdate.exe

pid	Process
2588	cdpjxV1A8WDL8VQ58D6.exe
2752	winupdate.exe
2752	winupdate.exe
2752	winupdate.exe

UPX packed file 13 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/files/0x000b000000012254-8.dat	upx
behavioral1/memory/2588-9-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2588-18-0x0000000003780000-0x0000000003865000-memory.dmp	upx
behavioral1/memory/2588-20-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-32-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2752-34-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-35-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-37-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-39-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-40-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-41-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-42-0x0000000000400000-0x00000000004E5000-memory.dmp	upx
behavioral1/memory/2704-43-0x0000000000400000-0x00000000004E5000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

cdpjxV1A8WDL8VQ58D6.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\winupdater = "C:\\Windupdt\\winupdate.exe"	cdpjxV1A8WDL8VQ58D6.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

winupdate.exe

description	pid	Process	procid_target
PID 2752 set thread context of 2704	2752	winupdate.exe	31

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 12 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

winupdate.exeexplorer.execdpjxV1A8WDL8VQ58D6.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	winupdate.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	explorer.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	cdpjxV1A8WDL8VQ58D6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	cdpjxV1A8WDL8VQ58D6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	cdpjxV1A8WDL8VQ58D6.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	cdpjxV1A8WDL8VQ58D6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	explorer.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

winupdate.exeexplorer.execdpjxV1A8WDL8VQ58D6.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	winupdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	explorer.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	cdpjxV1A8WDL8VQ58D6.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.execdpjxV1A8WDL8VQ58D6.exewinupdate.exeexplorer.exe

description	pid	Process
Token: SeDebugPrivilege	1420	ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe
Token: SeIncreaseQuotaPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeSecurityPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeTakeOwnershipPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeLoadDriverPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeSystemProfilePrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeSystemtimePrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeProfSingleProcessPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeIncBasePriorityPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeCreatePagefilePrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeBackupPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeRestorePrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeShutdownPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeDebugPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeSystemEnvironmentPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeChangeNotifyPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeRemoteShutdownPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeUndockPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeManageVolumePrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeImpersonatePrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeCreateGlobalPrivilege	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: 33	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: 34	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: 35	2588	cdpjxV1A8WDL8VQ58D6.exe
Token: SeIncreaseQuotaPrivilege	2752	winupdate.exe
Token: SeSecurityPrivilege	2752	winupdate.exe
Token: SeTakeOwnershipPrivilege	2752	winupdate.exe
Token: SeLoadDriverPrivilege	2752	winupdate.exe
Token: SeSystemProfilePrivilege	2752	winupdate.exe
Token: SeSystemtimePrivilege	2752	winupdate.exe
Token: SeProfSingleProcessPrivilege	2752	winupdate.exe
Token: SeIncBasePriorityPrivilege	2752	winupdate.exe
Token: SeCreatePagefilePrivilege	2752	winupdate.exe
Token: SeBackupPrivilege	2752	winupdate.exe
Token: SeRestorePrivilege	2752	winupdate.exe
Token: SeShutdownPrivilege	2752	winupdate.exe
Token: SeDebugPrivilege	2752	winupdate.exe
Token: SeSystemEnvironmentPrivilege	2752	winupdate.exe
Token: SeChangeNotifyPrivilege	2752	winupdate.exe
Token: SeRemoteShutdownPrivilege	2752	winupdate.exe
Token: SeUndockPrivilege	2752	winupdate.exe
Token: SeManageVolumePrivilege	2752	winupdate.exe
Token: SeImpersonatePrivilege	2752	winupdate.exe
Token: SeCreateGlobalPrivilege	2752	winupdate.exe
Token: 33	2752	winupdate.exe
Token: 34	2752	winupdate.exe
Token: 35	2752	winupdate.exe
Token: SeIncreaseQuotaPrivilege	2704	explorer.exe
Token: SeSecurityPrivilege	2704	explorer.exe
Token: SeTakeOwnershipPrivilege	2704	explorer.exe
Token: SeLoadDriverPrivilege	2704	explorer.exe
Token: SeSystemProfilePrivilege	2704	explorer.exe
Token: SeSystemtimePrivilege	2704	explorer.exe
Token: SeProfSingleProcessPrivilege	2704	explorer.exe
Token: SeIncBasePriorityPrivilege	2704	explorer.exe
Token: SeCreatePagefilePrivilege	2704	explorer.exe
Token: SeBackupPrivilege	2704	explorer.exe
Token: SeRestorePrivilege	2704	explorer.exe
Token: SeShutdownPrivilege	2704	explorer.exe
Token: SeDebugPrivilege	2704	explorer.exe
Token: SeSystemEnvironmentPrivilege	2704	explorer.exe
Token: SeChangeNotifyPrivilege	2704	explorer.exe
Token: SeRemoteShutdownPrivilege	2704	explorer.exe
Token: SeUndockPrivilege	2704	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.execdpjxV1A8WDL8VQ58D6.exewinupdate.exe

description	pid	Process	procid_target
PID 1420 wrote to memory of 2588	1420	ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe	28
PID 1420 wrote to memory of 2588	1420	ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe	28
PID 1420 wrote to memory of 2588	1420	ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe	28
PID 1420 wrote to memory of 2588	1420	ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe	28
PID 2588 wrote to memory of 2548	2588	cdpjxV1A8WDL8VQ58D6.exe	29
PID 2588 wrote to memory of 2548	2588	cdpjxV1A8WDL8VQ58D6.exe	29
PID 2588 wrote to memory of 2548	2588	cdpjxV1A8WDL8VQ58D6.exe	29
PID 2588 wrote to memory of 2548	2588	cdpjxV1A8WDL8VQ58D6.exe	29
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2588 wrote to memory of 2752	2588	cdpjxV1A8WDL8VQ58D6.exe	30
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31
PID 2752 wrote to memory of 2704	2752	winupdate.exe	31

C:\Users\Admin\AppData\Local\Temp\ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ff38fb89c4a9826d259d62c659caf13a_JaffaCakes118.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1420
- C:\Users\Admin\AppData\Local\Temp\cdpjxV1A8WDL8VQ58D6.exe
  "C:\Users\Admin\AppData\Local\Temp\cdpjxV1A8WDL8VQ58D6.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Executes dropped EXE
  - Loads dropped DLL
  - Adds Run key to start application
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    PID:2548
- - C:\Windupdt\winupdate.exe
    "C:\Windupdt\winupdate.exe"
    3⤵
    - Checks BIOS information in registry
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious use of SetThreadContext
    - Checks processor information in registry
    - Enumerates system info in registry
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2752
  - - C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\SysWOW64\explorer.exe"
      4⤵
      Checks BIOS information in registry
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious use of AdjustPrivilegeToken
      PID:2704

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\cdpjxV1A8WDL8VQ58D6.exe

Filesize
330KB

MD5
e97801072b7168ab6d2f3cfc685fbfc5

SHA1
5523677488c1aaf3e140dd654ec09d0c7cca574d

SHA256
9eaab3604ba8e7203e2e764a7b29f3ff94be723a8f66579c9357bf6207537010

SHA512
07e702fd1659cb5dd8c64901eda078caf1644c9b341d3acade72a90de319c485511f03b2c917d4095083381177d6d0d3dc4be33607412674218d2312801862fc

Download Submit
memory/1420-0-0x000007FEF5C80000-0x000007FEF661D000-memory.dmp

Filesize
9.6MB

Download
memory/1420-1-0x0000000001F60000-0x0000000001FE0000-memory.dmp

Filesize
512KB

Download
memory/1420-10-0x000007FEF5C80000-0x000007FEF661D000-memory.dmp

Filesize
9.6MB

Download
memory/2588-9-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2588-11-0x0000000000690000-0x0000000000691000-memory.dmp

Filesize
4KB

Download
memory/2588-18-0x0000000003780000-0x0000000003865000-memory.dmp

Filesize
916KB

Download
memory/2588-20-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-28-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2704-32-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-35-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-37-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-39-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-40-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-41-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-42-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2704-43-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download
memory/2752-27-0x0000000000B10000-0x0000000000BF5000-memory.dmp

Filesize
916KB

Download
memory/2752-26-0x0000000000B10000-0x0000000000BF5000-memory.dmp

Filesize
916KB

Download
memory/2752-34-0x0000000000400000-0x00000000004E5000-memory.dmp

Filesize
916KB

Download