dcrat | 2c85a938e111aa9274f3c0995553b6fc35912e56307734bc6c021941190d8a10

General

Target

JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Size

919KB
MD5

189cb9e3fd91b250452566f8e0c2af96
SHA1

67adf586e3764c6415b9d88b5a3de5d257086750
SHA256

2c85a938e111aa9274f3c0995553b6fc35912e56307734bc6c021941190d8a10
SHA512

6b2a055053ef65d009521a33e2e2474e840e37e1722b2355579d3f1485c5d81472542f8149133e955e070a91818f68edf6e049acbaf0cb055bf454bfeb7c0db3
SSDEEP

12288:UCLu7jnpsOJE3AAypPk8qi/c3ntaHroxcIYRWRqn4:UCiPpsRyl5qiuntmrMcIYQR+4

Score

10^/10

dcrat infostealer persistence rat

Malware Config

Signatures

DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
rat infostealer dcrat
Dcrat family
dcrat

Process spawned unexpected child process 5 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3964	932	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	264	932	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4640	932	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3088	932	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2604	932	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/3572-1-0x00000000000E0000-0x00000000001CC000-memory.dmp	dcrat
behavioral2/files/0x0007000000023ca9-11.dat	dcrat

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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

Executes dropped EXE 1 IoCs

pid	Process
928	fontdrvhost.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Windows\\System32\\DscCore\\RuntimeBroker.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Program Files (x86)\\Windows Mail\\fontdrvhost.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\kanji_2\\winlogon.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\shsvcs\\lsass.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\scrobj\\spoolsv.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

Drops file in System32 directory 9 IoCs

description	ioc	Process
File created	C:\Windows\System32\DscCore\RuntimeBroker.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File opened for modification	C:\Windows\System32\DscCore\RuntimeBroker.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\DscCore\9e8d7a4ca61bd92aff00cc37a7a4d62a2cac998d	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\scrobj\f3b6ecef712a24f33798f5d2fb3790c3d9b894c4	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\scrobj\spoolsv.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\kanji_2\winlogon.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\kanji_2\cc11b995f2a76da408ea6a601e682e64743153ad	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\shsvcs\lsass.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\shsvcs\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows Mail\fontdrvhost.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Program Files (x86)\Windows Mail\5b884080fd4f94e2695da25c503f9e33b9605b83	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

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\USER\S-1-5-21-3756129449-3121373848-4276368241-1000_Classes\Local Settings	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2604	schtasks.exe
3964	schtasks.exe
264	schtasks.exe
4640	schtasks.exe
3088	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3572	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
3572	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
3572	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
928	fontdrvhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3572	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Token: SeDebugPrivilege	928	fontdrvhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3572 wrote to memory of 976	3572	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe	88
PID 3572 wrote to memory of 976	3572	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe	88
PID 976 wrote to memory of 1772	976	cmd.exe	90
PID 976 wrote to memory of 1772	976	cmd.exe	90
PID 976 wrote to memory of 928	976	cmd.exe	91
PID 976 wrote to memory of 928	976	cmd.exe	91

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3572
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\7BVchQKbiB.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:976
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:1772
- - C:\Program Files (x86)\Windows Mail\fontdrvhost.exe
    "C:\Program Files (x86)\Windows Mail\fontdrvhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:928

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\DscCore\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:264

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\kanji_2\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\shsvcs\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3088

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\scrobj\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2604

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

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\7BVchQKbiB.bat

Filesize
215B

MD5
d4f81cf41ce379ef2bffcf9a9ea9b614

SHA1
e619e18c719f90784aecfcfa2c55d88519e7a4fc

SHA256
d85632a4d2faaa8bff12b010fd904c48e5f0772d52dc982e73630281a82a24fb

SHA512
382d3fac203fa54f8876d303e679dae669b7e75be471fc5a58db13918daf1b442fe9747bb621cb0ef4d3417228a2fdb19fc65d34ff140a4eae1d6e54b85ccc7f

Download Submit
C:\Windows\System32\scrobj\spoolsv.exe

Filesize
919KB

MD5
189cb9e3fd91b250452566f8e0c2af96

SHA1
67adf586e3764c6415b9d88b5a3de5d257086750

SHA256
2c85a938e111aa9274f3c0995553b6fc35912e56307734bc6c021941190d8a10

SHA512
6b2a055053ef65d009521a33e2e2474e840e37e1722b2355579d3f1485c5d81472542f8149133e955e070a91818f68edf6e049acbaf0cb055bf454bfeb7c0db3

Download Submit
memory/3572-0-0x00007FFB33813000-0x00007FFB33815000-memory.dmp

Filesize
8KB

Download
memory/3572-1-0x00000000000E0000-0x00000000001CC000-memory.dmp

Filesize
944KB

Download
memory/3572-4-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download
memory/3572-19-0x00007FFB33810000-0x00007FFB342D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads