dcrat | 6a11f3f9aef2409809f0a94b6189adbac3adb24ca4e2f5e773fe27b3e1d46bfc

General

Target

8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe
Size

1.2MB
MD5

8dd4feb508accc0825819ca3dbcd281a
SHA1

9a4c6b4628f9a7f96f8f15b81d9bfee310f7397e
SHA256

6a11f3f9aef2409809f0a94b6189adbac3adb24ca4e2f5e773fe27b3e1d46bfc
SHA512

7de2311194e1123f7c6c3f1dcae2edd8ab464c5ff5f561e125bc9a646e965122384980618e91e7d1f4010dd81c5872310c8d2e9cacd4d69ec6208c3512f55732
SSDEEP

24576:U2G/nvxW3Ww0t8jND8vbU7PDm1OaLUd/7TEEJ6+4/:UbA308V8zpKZTtS

Score

10^/10

dcrat discovery infostealer persistence rat

Malware Config

Signatures

DcRat 9 IoCs

DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

rat infostealer dcrat

description	ioc	pid	Process
		816	schtasks.exe
		2400	schtasks.exe
		2792	schtasks.exe
		2544	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe
		1652	schtasks.exe
		1856	schtasks.exe
		2160	schtasks.exe
		2300	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 8 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	816	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1652	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1856	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2400	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2160	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2300	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2792	2200	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2544	2200	schtasks.exe	34

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/memory/2968-13-0x00000000000D0000-0x00000000001BE000-memory.dmp	dcrat
behavioral1/files/0x00060000000186bf-12.dat	dcrat
behavioral1/memory/2876-37-0x0000000001080000-0x000000000116E000-memory.dmp	dcrat

Executes dropped EXE 3 IoCs

pid	Process
2968	DriversvcfontWin.exe
2424	DriversvcfontWin.exe
2876	spoolsv.exe

Loads dropped DLL 2 IoCs

pid	Process
2856	cmd.exe
2856	cmd.exe

Adds Run key to start application 2 TTPs 8 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\spoolsv = "\"C:\\ProgramData\\Application Data\\spoolsv.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhost = "\"C:\\Program Files (x86)\\Windows NT\\Accessories\\it-IT\\taskhost.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Documents and Settings\\WmiPrvSE.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WmiPrvSE = "\"C:\\Windows\\System32\\wbem\\msfeeds\\WmiPrvSE.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Program Files\\Google\\Chrome\\Application\\SetupMetrics\\services.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sppsvc = "\"C:\\Windows\\System32\\MsPbdaCoInst\\sppsvc.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\PerfLogs\\Admin\\lsass.exe\""	DriversvcfontWin.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "\"C:\\Driversvc\\System.exe\""	DriversvcfontWin.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\System32\MsPbdaCoInst\sppsvc.exe	DriversvcfontWin.exe
File created	C:\Windows\System32\MsPbdaCoInst\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	DriversvcfontWin.exe
File created	C:\Windows\System32\wbem\msfeeds\WmiPrvSE.exe	DriversvcfontWin.exe
File opened for modification	C:\Windows\System32\wbem\msfeeds\WmiPrvSE.exe	DriversvcfontWin.exe
File created	C:\Windows\System32\wbem\msfeeds\24dbde2999530ef5fd907494bc374d663924116c	DriversvcfontWin.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Windows NT\Accessories\it-IT\taskhost.exe	DriversvcfontWin.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\it-IT\b75386f1303e64d8139363b71e44ac16341adf4e	DriversvcfontWin.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	spoolsv.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	spoolsv.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1652	schtasks.exe
1856	schtasks.exe
2400	schtasks.exe
2160	schtasks.exe
2300	schtasks.exe
2792	schtasks.exe
2544	schtasks.exe
816	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2968	DriversvcfontWin.exe
2424	DriversvcfontWin.exe
2876	spoolsv.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	DriversvcfontWin.exe
Token: SeDebugPrivilege	2424	DriversvcfontWin.exe
Token: SeDebugPrivilege	2876	spoolsv.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 1372	2340	8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 1372	2340	8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 1372	2340	8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe	30
PID 2340 wrote to memory of 1372	2340	8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe	30
PID 1372 wrote to memory of 2856	1372	WScript.exe	31
PID 1372 wrote to memory of 2856	1372	WScript.exe	31
PID 1372 wrote to memory of 2856	1372	WScript.exe	31
PID 1372 wrote to memory of 2856	1372	WScript.exe	31
PID 2856 wrote to memory of 2968	2856	cmd.exe	33
PID 2856 wrote to memory of 2968	2856	cmd.exe	33
PID 2856 wrote to memory of 2968	2856	cmd.exe	33
PID 2856 wrote to memory of 2968	2856	cmd.exe	33
PID 2968 wrote to memory of 2424	2968	DriversvcfontWin.exe	39
PID 2968 wrote to memory of 2424	2968	DriversvcfontWin.exe	39
PID 2968 wrote to memory of 2424	2968	DriversvcfontWin.exe	39
PID 2424 wrote to memory of 2876	2424	DriversvcfontWin.exe	44
PID 2424 wrote to memory of 2876	2424	DriversvcfontWin.exe	44
PID 2424 wrote to memory of 2876	2424	DriversvcfontWin.exe	44

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\8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8dd4feb508accc0825819ca3dbcd281a_JaffaCakes118.exe"
1⤵
- DcRat
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Driversvc\AhjG1SSiCzrRmq149Re8x56.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1372
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Driversvc\XdscX9Udcy.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2856
  - - C:\Driversvc\DriversvcfontWin.exe
      "C:\Driversvc\DriversvcfontWin.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2968
    - - C:\Driversvc\DriversvcfontWin.exe
        
        "C:\Driversvc\DriversvcfontWin.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Drops file in Program Files directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:2424
      - C:\ProgramData\Application Data\spoolsv.exe
        
        "C:\ProgramData\Application Data\spoolsv.exe"
        6⤵
        Executes dropped EXE
        Modifies system certificate store
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Windows\System32\wbem\msfeeds\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:816

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files\Google\Chrome\Application\SetupMetrics\services.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\MsPbdaCoInst\sppsvc.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\PerfLogs\Admin\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2400

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Driversvc\System.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2160

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\ProgramData\Application Data\spoolsv.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2300

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\it-IT\taskhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Documents and Settings\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2544

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

2

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Driversvc\AhjG1SSiCzrRmq149Re8x56.vbe

Filesize
196B

MD5
40042ea3910c101240fdb6e7c69e2a86

SHA1
98edbd6fb589e1e1f47d9d45e355bc0f081ce887

SHA256
4a4fb4a3a1f98493c6ae2fc235cc7ca0178f1249b41289dad58dd4b534f1beef

SHA512
dceba2792f91855dead8f2373930a02f50381cddf44ec955924ca3ce5c1a58abd8448da0f03f91ee9ede698aa4acdccf6ce634000430ddbc1608dc322db55de5

Download Submit
C:\Driversvc\DriversvcfontWin.exe

Filesize
921KB

MD5
6a5f480d53b5dafb43d3bf62f33384bb

SHA1
b41ccb5eed4de277a45ddd38d81121d7712cc035

SHA256
c9b11504ef5296c23fe7970a800aace594215056bb3f0ab44bdd341b58f92c1f

SHA512
fba887de35d97cd9f8f30c9eb9e01362851b052913e43287c3d2c48b41eb94518ecd709a4593c54c9a090f395aedf1becaa322c9af10ada06f757604ad83b38c

Download Submit
C:\Driversvc\XdscX9Udcy.bat

Filesize
35B

MD5
e6033eb3cc240c64ff76c46b7806f27b

SHA1
a5be4bb4378a3b20da162bfb758deb1154c25faf

SHA256
062fb81034841258ce878902f5bdfbfb00684b8e7162c9ebff2d7cf6f15cd77d

SHA512
6be31bb696d7882a051db97833ca2714a6478aa0b18dcf5030398ef3ca71170a0a880fa39af5b7026df277d67a1e6d906abf714b804a4b7aa047aecb2ead32bc

Download Submit
memory/2876-37-0x0000000001080000-0x000000000116E000-memory.dmp

Filesize
952KB

Download
memory/2968-13-0x00000000000D0000-0x00000000001BE000-memory.dmp

Filesize
952KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads