dcrat | 64ac9d88e8e64873dbe503bb52fecbd0481689a0895bd6d89b6d0c3335c0cdfb

General

Target

JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Size

910KB
MD5

c19cd7830905473e79a23fb6983bfd39
SHA1

de5d55b5242e543bc33fe14414a04692b7dd72b4
SHA256

64ac9d88e8e64873dbe503bb52fecbd0481689a0895bd6d89b6d0c3335c0cdfb
SHA512

9d72cb75aede54b332d70988688b50d8611cd506d92ebab6b6fa93fd53d3afefbdbeb15e82f562c1640a9dd3a69da0a715d3d68fb1b58da16b3cb463eacc0bff
SSDEEP

24576:6yY5mNErQCK/rNtnqsIxcEGU4Dp8dH4+4:Q5maMCK/b24DpKb

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	924	4512	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4648	4512	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1332	4512	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2388	4512	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4476	4512	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3456	4512	schtasks.exe	82
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2284	4512	schtasks.exe	82

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/memory/1916-1-0x00000000004A0000-0x000000000058A000-memory.dmp	dcrat
behavioral2/files/0x0007000000023cc0-11.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-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe

Executes dropped EXE 1 IoCs

pid	Process
3684	spoolsv.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\unsecapp = "\"C:\\Windows\\System32\\wbem\\qoswmi_uninstall\\unsecapp.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Documents and Settings\\spoolsv.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\Program Files\\Common Files\\microsoft shared\\ClickToRun\\api-ms-win-core-localization-l1-2-0\\OfficeClickToRun.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\Windows\\SystemApps\\Microsoft.Windows.Search_cw5n1h2txyewy\\SearchApi\\SearchApp.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\PerfLogs\\System.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Users\\Admin\\SppExtComObj.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fontdrvhost = "\"C:\\Windows\\System32\\batmeter\\fontdrvhost.exe\""	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\System32\batmeter\fontdrvhost.exe	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
File created	C:\Windows\System32\batmeter\5b884080fd4f94e2695da25c503f9e33b9605b83	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
File created	C:\Windows\System32\wbem\qoswmi_uninstall\unsecapp.exe	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
File created	C:\Windows\System32\wbem\qoswmi_uninstall\29c1c3cc0f76855c7e7456076a4ffc27e4947119	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-core-localization-l1-2-0\OfficeClickToRun.exe	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-core-localization-l1-2-0\e6c9b481da804f07baff8eff543b0a1441069b5d	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApi\SearchApp.exe	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
File created	C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApi\38384e6a620884a6b69bcc56f80d556f9200171c	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.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-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe

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
924	schtasks.exe
4648	schtasks.exe
1332	schtasks.exe
2388	schtasks.exe
4476	schtasks.exe
3456	schtasks.exe
2284	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
3684	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe
Token: SeDebugPrivilege	3684	spoolsv.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 760	1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe	90
PID 1916 wrote to memory of 760	1916	JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe	90
PID 760 wrote to memory of 2828	760	cmd.exe	92
PID 760 wrote to memory of 2828	760	cmd.exe	92
PID 760 wrote to memory of 3684	760	cmd.exe	95
PID 760 wrote to memory of 3684	760	cmd.exe	95

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_c19cd7830905473e79a23fb6983bfd39.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c19cd7830905473e79a23fb6983bfd39.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\JwXwYkyWMQ.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\system32\w32tm.exe
    w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
    3⤵
    PID:2828
- - C:\Documents and Settings\spoolsv.exe
    "C:\Documents and Settings\spoolsv.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Users\Admin\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "fontdrvhost" /sc ONLOGON /tr "'C:\Windows\System32\batmeter\fontdrvhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4648

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\qoswmi_uninstall\unsecapp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1332

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Documents and Settings\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2388

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-core-localization-l1-2-0\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4476

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApi\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3456

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\PerfLogs\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2284

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

Replay Monitor

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Downloads

C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-core-localization-l1-2-0\OfficeClickToRun.exe

Filesize
910KB

MD5
c19cd7830905473e79a23fb6983bfd39

SHA1
de5d55b5242e543bc33fe14414a04692b7dd72b4

SHA256
64ac9d88e8e64873dbe503bb52fecbd0481689a0895bd6d89b6d0c3335c0cdfb

SHA512
9d72cb75aede54b332d70988688b50d8611cd506d92ebab6b6fa93fd53d3afefbdbeb15e82f562c1640a9dd3a69da0a715d3d68fb1b58da16b3cb463eacc0bff

Download Submit
C:\Users\Admin\AppData\Local\Temp\JwXwYkyWMQ.bat

Filesize
201B

MD5
f6dde50a4fcdf94746d68b60050f5409

SHA1
e7a5829e7e0dbf00006f13c912c73a80c69cca03

SHA256
07ecc5558dd202e275edaebc41e876f004527dbf67b9904a4dd9b5bdc220dd8c

SHA512
045e6cfdff670e23e5e13622b8b01be37f5f04a9c5b99735bb70ecf5d0ee4f3149ffbc522f381968d6b9877b4b0f9e2aa2ec1185f52eaa30e3afacb57f5b0764

Download Submit
memory/1916-0-0x00007FF8CFC13000-0x00007FF8CFC15000-memory.dmp

Filesize
8KB

Download
memory/1916-1-0x00000000004A0000-0x000000000058A000-memory.dmp

Filesize
936KB

Download
memory/1916-4-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download
memory/1916-22-0x00007FF8CFC10000-0x00007FF8D06D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads