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 7 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	2912	1708	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2184	1708	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2844	1708	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2708	1708	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2744	1708	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3028	1708	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2632	1708	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2132-1-0x0000000000E00000-0x0000000000EEC000-memory.dmp	dcrat
behavioral1/files/0x0006000000018bf3-11.dat	dcrat
behavioral1/memory/1916-23-0x0000000000FA0000-0x000000000108C000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
1916	taskhost.exe

Adds Run key to start application 2 TTPs 7 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\taskhost = "\"C:\\Program Files\\Common Files\\Services\\taskhost.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\compstui\\csrss.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\QAGENT\\services.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\eqossnap\\csrss.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Windows\\System32\\filemgmt\\taskhost.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\ProgramData\\Microsoft\\MSDN\\8.0\\WmiPrvSE.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Users\\All Users\\Microsoft\\Windows\\Power Efficiency Diagnostics\\WmiPrvSE.exe\""	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

Drops file in System32 directory 8 IoCs

description	ioc	Process
File created	C:\Windows\System32\eqossnap\886983d96e3d3e31032c679b2d4ea91b6c05afef	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\filemgmt\taskhost.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\filemgmt\b75386f1303e64d8139363b71e44ac16341adf4e	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\compstui\csrss.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\compstui\886983d96e3d3e31032c679b2d4ea91b6c05afef	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\QAGENT\services.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\QAGENT\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Windows\System32\eqossnap\csrss.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\Services\taskhost.exe	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
File created	C:\Program Files\Common Files\Services\b75386f1303e64d8139363b71e44ac16341adf4e	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 7 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2184	schtasks.exe
2844	schtasks.exe
2708	schtasks.exe
2744	schtasks.exe
3028	schtasks.exe
2632	schtasks.exe
2912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2132	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
1916	taskhost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2132	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe
Token: SeDebugPrivilege	1916	taskhost.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2132 wrote to memory of 1916	2132	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe	38
PID 2132 wrote to memory of 1916	2132	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe	38
PID 2132 wrote to memory of 1916	2132	JaffaCakes118_189cb9e3fd91b250452566f8e0c2af96.exe	38

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⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2132
- C:\Program Files\Common Files\Services\taskhost.exe
  "C:\Program Files\Common Files\Services\taskhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1916

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Users\All Users\Microsoft\Windows\Power Efficiency Diagnostics\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files\Common Files\Services\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2184

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\compstui\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\QAGENT\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2708

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\eqossnap\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\System32\filemgmt\taskhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3028

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\ProgramData\Microsoft\MSDN\8.0\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2632

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\System32\eqossnap\csrss.exe

Filesize
919KB

MD5
189cb9e3fd91b250452566f8e0c2af96

SHA1
67adf586e3764c6415b9d88b5a3de5d257086750

SHA256
2c85a938e111aa9274f3c0995553b6fc35912e56307734bc6c021941190d8a10

SHA512
6b2a055053ef65d009521a33e2e2474e840e37e1722b2355579d3f1485c5d81472542f8149133e955e070a91818f68edf6e049acbaf0cb055bf454bfeb7c0db3

Download Submit
memory/1916-23-0x0000000000FA0000-0x000000000108C000-memory.dmp

Filesize
944KB

Download
memory/2132-0-0x000007FEF5993000-0x000007FEF5994000-memory.dmp

Filesize
4KB

Download
memory/2132-1-0x0000000000E00000-0x0000000000EEC000-memory.dmp

Filesize
944KB

Download
memory/2132-2-0x000007FEF5990000-0x000007FEF637C000-memory.dmp

Filesize
9.9MB

Download
memory/2132-24-0x000007FEF5990000-0x000007FEF637C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads