darkcomet | 027067f36ed67009d96584f1a8f71dc6ebcba2744fdf537ab9743555f4c4cb61

General

Target

4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe
Size

566KB
MD5

4f8bf7bb623ac3043637f6e9994beaf0
SHA1

ef15db18e9bf71b2338e110bbc91d9e6f2a5e456
SHA256

027067f36ed67009d96584f1a8f71dc6ebcba2744fdf537ab9743555f4c4cb61
SHA512

9c36397dd6242bd627150964de65cba86df8b3e4d616ddf9b0eb1e8a6372d1b683dda7bbe38aa12724f9dc762d45d4d0b8e1e87a50326e4cd887ee63db7ebda2
SSDEEP

12288:ZClL5bFlF4J0usCwvM+HDPtmDdeXpVTtHNbPVIHsWiEPm:2L5je0usCiDPg5e7htwLiAm

Score

10^/10

darkcomet newdarkcomet discovery evasion persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

NewDarkcomet

C2

nfree6838.no-ip.biz:1604

Mutex

DC_MUTEX-FSWVA9S

Attributes

InstallPath
Windows\Microsoft Framework V2.30.6
gencode
NZcQEjgZ8n6a
install
true
offline_keylogger
false
persistence
true
reg_key
Windows Update

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:\\Users\\Admin\\AppData\\Local\\Temp\\Windows\\Microsoft Framework V2.30.6"	Join.exe

Sets file to hidden 1 TTPs 2 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
4796	attrib.exe
1256	attrib.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	Join.exe

Executes dropped EXE 1 IoCs

pid	Process
2076	Join.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Windows\\Microsoft Framework V2.30.6"	Join.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 6 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	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Join.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	Join.exe
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	OpenWith.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2076	Join.exe
Token: SeSecurityPrivilege	2076	Join.exe
Token: SeTakeOwnershipPrivilege	2076	Join.exe
Token: SeLoadDriverPrivilege	2076	Join.exe
Token: SeSystemProfilePrivilege	2076	Join.exe
Token: SeSystemtimePrivilege	2076	Join.exe
Token: SeProfSingleProcessPrivilege	2076	Join.exe
Token: SeIncBasePriorityPrivilege	2076	Join.exe
Token: SeCreatePagefilePrivilege	2076	Join.exe
Token: SeBackupPrivilege	2076	Join.exe
Token: SeRestorePrivilege	2076	Join.exe
Token: SeShutdownPrivilege	2076	Join.exe
Token: SeDebugPrivilege	2076	Join.exe
Token: SeSystemEnvironmentPrivilege	2076	Join.exe
Token: SeChangeNotifyPrivilege	2076	Join.exe
Token: SeRemoteShutdownPrivilege	2076	Join.exe
Token: SeUndockPrivilege	2076	Join.exe
Token: SeManageVolumePrivilege	2076	Join.exe
Token: SeImpersonatePrivilege	2076	Join.exe
Token: SeCreateGlobalPrivilege	2076	Join.exe
Token: 33	2076	Join.exe
Token: 34	2076	Join.exe
Token: 35	2076	Join.exe
Token: 36	2076	Join.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4764	OpenWith.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3760 wrote to memory of 2076	3760	4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe	84
PID 3760 wrote to memory of 2076	3760	4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe	84
PID 3760 wrote to memory of 2076	3760	4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe	84
PID 2076 wrote to memory of 3252	2076	Join.exe	85
PID 2076 wrote to memory of 3252	2076	Join.exe	85
PID 2076 wrote to memory of 3252	2076	Join.exe	85
PID 2076 wrote to memory of 1704	2076	Join.exe	87
PID 2076 wrote to memory of 1704	2076	Join.exe	87
PID 2076 wrote to memory of 1704	2076	Join.exe	87
PID 3252 wrote to memory of 4796	3252	cmd.exe	89
PID 3252 wrote to memory of 4796	3252	cmd.exe	89
PID 3252 wrote to memory of 4796	3252	cmd.exe	89
PID 1704 wrote to memory of 1256	1704	cmd.exe	90
PID 1704 wrote to memory of 1256	1704	cmd.exe	90
PID 1704 wrote to memory of 1256	1704	cmd.exe	90

Views/modifies file attributes 1 TTPs 2 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4796	attrib.exe
1256	attrib.exe

C:\Users\Admin\AppData\Local\Temp\4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\4f8bf7bb623ac3043637f6e9994beaf0_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3760
- C:\Users\Admin\AppData\Local\Temp\Join.exe
  "C:\Users\Admin\AppData\Local\Temp\Join.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp\Join.exe" +s +h
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3252
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp\Join.exe" +s +h
      4⤵
      Sets file to hidden
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:4796
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /k attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1704
  - - C:\Windows\SysWOW64\attrib.exe
      attrib "C:\Users\Admin\AppData\Local\Temp" +s +h
      4⤵
      Sets file to hidden
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:1256

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Hide Artifacts

2

T1564

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
690KB

MD5
d39743c9fccf55e8335a34bad0f5d0f0

SHA1
539b2acdf607e1704339091e96be77f6c202eb5e

SHA256
777c06f32491bf8ecdf2c9498762fac7d87a87a847549b421c7fefb875b2cf49

SHA512
0ea1b207c2955f73be4c9507f43fc052e26051ec1c89ae63422b6a37490462813b8ac18c6aafc8833ff1e8fcf50e9437a30cb9792d7675417015e5b18744136f

Download Submit
memory/2076-12-0x0000000002110000-0x0000000002111000-memory.dmp

Filesize
4KB

Download
memory/2076-16-0x0000000000400000-0x00000000004BA000-memory.dmp

Filesize
744KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads