darkcomet | b69dde83966db018e413be9a65c7a11b9a8ae1f15e3b4998bf264541248b6af5

General

Target

2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe
Size

1.4MB
MD5

2563cc3dc3b2605db20e7c24f26d43bd
SHA1

ef73cf99045943545cba7a1d460e264fbcf4abf2
SHA256

b69dde83966db018e413be9a65c7a11b9a8ae1f15e3b4998bf264541248b6af5
SHA512

d2edd7e30444307ef27c83babc675026c73ed2164804bb85ceb921c34b2686bc808175c2155fa558b1c323c6934e2868555bd531373c845e2a9c3cde7aa5376e
SSDEEP

24576:K9b43Bo7xvu2Ui+mBvqvtEWvRk8Ml6uOdb/3:e4S7xui/wRk9suQ73

Score

10^/10

darkcomet guest16 persistence rat trojan

Malware Config

Extracted

Family

darkcomet

Botnet

Guest16

C2

msnfacebook.servehttp.com:1604

Mutex

DC_MUTEX-787490X

Attributes

InstallPath
MSDCSC\update.exe
gencode
xFeyzRd5nMoG
install
true
offline_keylogger
true
persistence
true
reg_key
MicroUpdate

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\\Documents\\MSDCSC\\update.exe"	vbc.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-1-5-21-3665033694-1447845302-680750983-1000\Control Panel\International\Geo\Nation	vbc.exe

Executes dropped EXE 2 IoCs

pid	Process
2240	vbc.exe
3424	update.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

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-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JavaUpdtr = "C:\\Users\\Admin\\AppData\\Roaming\\JavaUpdtr\\2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe"	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3665033694-1447845302-680750983-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicroUpdate = "C:\\Users\\Admin\\Documents\\MSDCSC\\update.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5084 set thread context of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	2240	vbc.exe
Token: SeSecurityPrivilege	2240	vbc.exe
Token: SeTakeOwnershipPrivilege	2240	vbc.exe
Token: SeLoadDriverPrivilege	2240	vbc.exe
Token: SeSystemProfilePrivilege	2240	vbc.exe
Token: SeSystemtimePrivilege	2240	vbc.exe
Token: SeProfSingleProcessPrivilege	2240	vbc.exe
Token: SeIncBasePriorityPrivilege	2240	vbc.exe
Token: SeCreatePagefilePrivilege	2240	vbc.exe
Token: SeBackupPrivilege	2240	vbc.exe
Token: SeRestorePrivilege	2240	vbc.exe
Token: SeShutdownPrivilege	2240	vbc.exe
Token: SeDebugPrivilege	2240	vbc.exe
Token: SeSystemEnvironmentPrivilege	2240	vbc.exe
Token: SeChangeNotifyPrivilege	2240	vbc.exe
Token: SeRemoteShutdownPrivilege	2240	vbc.exe
Token: SeUndockPrivilege	2240	vbc.exe
Token: SeManageVolumePrivilege	2240	vbc.exe
Token: SeImpersonatePrivilege	2240	vbc.exe
Token: SeCreateGlobalPrivilege	2240	vbc.exe
Token: 33	2240	vbc.exe
Token: 34	2240	vbc.exe
Token: 35	2240	vbc.exe
Token: 36	2240	vbc.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 5084 wrote to memory of 2240	5084	2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe	92
PID 2240 wrote to memory of 3424	2240	vbc.exe	102
PID 2240 wrote to memory of 3424	2240	vbc.exe	102
PID 2240 wrote to memory of 3424	2240	vbc.exe	102

C:\Users\Admin\AppData\Local\Temp\2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\2563cc3dc3b2605db20e7c24f26d43bd_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Modifies WinLogon for persistence
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Users\Admin\Documents\MSDCSC\update.exe
    "C:\Users\Admin\Documents\MSDCSC\update.exe"
    3⤵
    - Executes dropped EXE
    PID:3424

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=4248,i,17325488789339133686,9539570259395798500,262144 --variations-seed-version --mojo-platform-channel-handle=3760 /prefetch:8
1⤵
PID:1500

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

1

T1064

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

Modify Registry

Scripting

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
1.1MB

MD5
d881de17aa8f2e2c08cbb7b265f928f9

SHA1
08936aebc87decf0af6e8eada191062b5e65ac2a

SHA256
b3a37093609f9a20ad60b85a9fa9de2ba674cba9b5bd687729440c70ba619ca0

SHA512
5f23bfb1b8740247b36ed0ab741738c7d4c949736129e767213e321607d1ccd3e3a8428e4ba44bd28a275b5e3f6206285b1a522514b7ef7ea5e698d90a713d34

Download Submit
memory/2240-7-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2240-10-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2240-14-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2240-12-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/2240-16-0x0000000002430000-0x0000000002431000-memory.dmp

Filesize
4KB

Download
memory/2240-77-0x0000000000400000-0x00000000004CA000-memory.dmp

Filesize
808KB

Download
memory/5084-0-0x0000000074742000-0x0000000074743000-memory.dmp

Filesize
4KB

Download
memory/5084-2-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5084-1-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5084-15-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads