darkcomet | fbbf5fdff35e80dcb155a550ad78d2c7e93dc0989501c7e646e45183af4ecc1b

Analysis

max time kernel
140s
max time network
125s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-10-2024 14:33

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General

Target

4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Size

275KB
MD5

4d5d8793f71abe832d745d456cadc28a
SHA1

554b0a06a66376030dcf08aa62ccf6536cfe52e0
SHA256

fbbf5fdff35e80dcb155a550ad78d2c7e93dc0989501c7e646e45183af4ecc1b
SHA512

6867b1b08fe5da199bdfae65d80e20b1cd639c4d0d4e55f7dd4b835304530142ea53daa11ec00210619bdbc2460ffc18818ef7f6d8eb5e8c0d7f4ca09430b499
SSDEEP

6144:Mtzy9mZhL3lyNfH/tA0XMnY/2zZIgnwAB9Nhkq3:ceU3VaftA0XazZIgHB9Nhkc

Score

10^/10

darkcomet discovery 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

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\UserInit = "C:\\Windows\\system32\\userinit.exe,C:\\Windows\\Windupdt\\winupdate.exe"	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe

Checks BIOS information in registry 2 TTPs 1 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\SystemBiosDate	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\VKSaver.exe = "C:\\Windows\\Windupdt\\winupdate.exe"	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\VKSaver.exe = "C:\\Windows\\Windupdt\\winupdate.exe"	notepad.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\explorer.exe	explorer.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2896 set thread context of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 3028 set thread context of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3028-9-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-5-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-8-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-4-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-13-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-15-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-14-0x0000000013140000-0x00000000131FD000-memory.dmp	upx
behavioral1/memory/3028-54-0x0000000013140000-0x00000000131FD000-memory.dmp	upx

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\Windupdt\winupdate.exe	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
File opened for modification	C:\Windows\Windupdt\winupdate.exe	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
File opened for modification	C:\Windows\Windupdt\	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
File created	C:\Windows\Windupdt\winupdate.exe	notepad.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Checks processor information in registry 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeSecurityPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeTakeOwnershipPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeLoadDriverPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeSystemProfilePrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeSystemtimePrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeProfSingleProcessPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeCreatePagefilePrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeBackupPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeRestorePrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeShutdownPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeDebugPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeSystemEnvironmentPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeChangeNotifyPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeRemoteShutdownPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeUndockPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeManageVolumePrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeImpersonatePrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: SeCreateGlobalPrivilege	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: 33	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: 34	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
Token: 35	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
2004	explorer.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 2896 wrote to memory of 3028	2896	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	28
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2448	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	29
PID 3028 wrote to memory of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30
PID 3028 wrote to memory of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30
PID 3028 wrote to memory of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30
PID 3028 wrote to memory of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30
PID 3028 wrote to memory of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30
PID 3028 wrote to memory of 2004	3028	4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2896
- C:\Users\Admin\AppData\Local\Temp\4d5d8793f71abe832d745d456cadc28a_JaffaCakes118.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks BIOS information in registry
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3028
- - C:\Windows\SysWOW64\notepad.exe
    notepad
    3⤵
    - Adds Run key to start application
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    PID:2448
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2004

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2004-46-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2004-57-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2004-47-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2004-51-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2004-52-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2004-49-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2448-18-0x0000000000080000-0x0000000000081000-memory.dmp

Filesize
4KB

Download
memory/2448-42-0x0000000000190000-0x0000000000191000-memory.dmp

Filesize
4KB

Download
memory/2896-12-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/2896-10-0x0000000000420000-0x0000000000438000-memory.dmp

Filesize
96KB

Download
memory/2896-0-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/3028-15-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-16-0x0000000000270000-0x0000000000271000-memory.dmp

Filesize
4KB

Download
memory/3028-14-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-13-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-54-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-4-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-3-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-8-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-5-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-9-0x0000000013140000-0x00000000131FD000-memory.dmp

Filesize
756KB

Download
memory/3028-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads