dcrat | c5aec31c3a3fc9c1099fcb2fe92e7d8660f861cbf76a8cb05e6a0dd3491afeb0

General

Target

JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
Size

1017KB
MD5

aae095df83541552b5c6dbb53d82d673
SHA1

229ad3808f612acbedf1c18311d228d230b6316c
SHA256

c5aec31c3a3fc9c1099fcb2fe92e7d8660f861cbf76a8cb05e6a0dd3491afeb0
SHA512

4fb01cb04c694231c875b03396991275bf55faf1a7b817cc2c3fd959929fc68a58ea61241b1fce210b6a7e9bb550ce3a590b67dd2aa7d88708a9bf1a431bb4ed
SSDEEP

12288:FWS8z4eYDr/0fAhZRFABcwTiEJad8KZyc2nS1hYLcS4nQsMPd7XSeD6vGaI1qn4:FWSK6H0fMGcwzJsZZyLwvn2V7nDki+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	1600	2928	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2936	2928	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1676	2928	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2956	2928	schtasks.exe	30
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2708	2928	schtasks.exe	30

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/1612-1-0x0000000000230000-0x0000000000336000-memory.dmp	dcrat
behavioral1/files/0x0005000000019820-11.dat	dcrat
behavioral1/memory/2844-19-0x0000000000F50000-0x0000000001056000-memory.dmp	dcrat

Executes dropped EXE 1 IoCs

pid	Process
2844	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.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\explorer = "\"C:\\Windows\\bootstat\\explorer.exe\""	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\sysprint\\lsass.exe\""	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\Setup\\State\\explorer.exe\""	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\JaffaCakes118_aae095df83541552b5c6dbb53d82d673 = "\"C:\\Users\\Public\\Libraries\\JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe\""	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\winlogon = "\"C:\\Windows\\System32\\MultiDigiMon\\winlogon.exe\""	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\System32\MultiDigiMon\winlogon.exe	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\System32\MultiDigiMon\cc11b995f2a76da408ea6a601e682e64743153ad	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\System32\sysprint\lsass.exe	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\System32\sysprint\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Setup\State\explorer.exe	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\Setup\State\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\bootstat\explorer.exe	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\bootstat\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
File created	C:\Windows\Setup\State\explorer.exe	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.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 5 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1600	schtasks.exe
2936	schtasks.exe
1676	schtasks.exe
2956	schtasks.exe
2708	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1612	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
2844	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1612	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
Token: SeDebugPrivilege	2844	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 2844	1612	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe	36
PID 1612 wrote to memory of 2844	1612	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe	36
PID 1612 wrote to memory of 2844	1612	JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe	36

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_aae095df83541552b5c6dbb53d82d673.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe"
1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1612
- C:\Users\Public\Libraries\JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe
  "C:\Users\Public\Libraries\JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\Setup\State\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "JaffaCakes118_aae095df83541552b5c6dbb53d82d673" /sc ONLOGON /tr "'C:\Users\Public\Libraries\JaffaCakes118_aae095df83541552b5c6dbb53d82d673.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2936

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\MultiDigiMon\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\bootstat\explorer.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2956

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

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

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Downloads

C:\Windows\System32\sysprint\lsass.exe

Filesize
1017KB

MD5
aae095df83541552b5c6dbb53d82d673

SHA1
229ad3808f612acbedf1c18311d228d230b6316c

SHA256
c5aec31c3a3fc9c1099fcb2fe92e7d8660f861cbf76a8cb05e6a0dd3491afeb0

SHA512
4fb01cb04c694231c875b03396991275bf55faf1a7b817cc2c3fd959929fc68a58ea61241b1fce210b6a7e9bb550ce3a590b67dd2aa7d88708a9bf1a431bb4ed

Download Submit
memory/1612-0-0x000007FEF6BB3000-0x000007FEF6BB4000-memory.dmp

Filesize
4KB

Download
memory/1612-1-0x0000000000230000-0x0000000000336000-memory.dmp

Filesize
1.0MB

Download
memory/1612-2-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/1612-20-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/2844-19-0x0000000000F50000-0x0000000001056000-memory.dmp

Filesize
1.0MB

Download
memory/2844-21-0x0000000000240000-0x000000000024E000-memory.dmp

Filesize
56KB

Download
memory/2844-22-0x0000000000460000-0x000000000046C000-memory.dmp

Filesize
48KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads