dcrat | db81002b2874cdc20123a6a943df0338386b945ebca26f3ff37ef071df59bd5d

Analysis

max time kernel
94s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-01-2025 12:46

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General

Target

JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe
Size

1.3MB
MD5

a00b9106e0e0edaa5e6540711d67d08a
SHA1

076e53a2c72424d8b55d839a662ad2738b5f8bd1
SHA256

db81002b2874cdc20123a6a943df0338386b945ebca26f3ff37ef071df59bd5d
SHA512

48f2b75b64fe98b53f3aa331bde9384d78b77bed000c0e14c0728ef95466ac6c43e8ee7cf44f68103423bd94f7f12613b04d24a0869cdf314290b79192afe413
SSDEEP

24576:U2G/nvxW3Ww0t5N7MCHS/+tqnmJZqmsIma/59qihru6Lc+4p:UbA30jMAl74mHWiBbc

Score

10^/10

dcrat discovery infostealer persistence rat

Malware Config

Signatures

DcRat 10 IoCs

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

rat infostealer dcrat

description	ioc	pid	Process
		1556	schtasks.exe
		4836	schtasks.exe
		3460	schtasks.exe
		4200	schtasks.exe
		1704	schtasks.exe
		2780	schtasks.exe
		1308	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe
		4800	schtasks.exe
		4948	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 9 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	1308	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1556	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4800	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4836	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4948	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3460	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4200	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1704	5080	schtasks.exe	87
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2780	5080	schtasks.exe	87

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral2/files/0x000a000000023bac-10.dat	dcrat
behavioral2/memory/1532-13-0x0000000000E00000-0x0000000000F0C000-memory.dmp	dcrat

Checks computer location settings 2 TTPs 3 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	fontreviewwinsvcrefPerfdll.exe

Executes dropped EXE 2 IoCs

pid	Process
1532	fontreviewwinsvcrefPerfdll.exe
2308	RuntimeBroker.exe

Adds Run key to start application 2 TTPs 9 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\taskhostw = "\"C:\\Recovery\\WindowsRE\\taskhostw.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\conhost = "\"C:\\Windows\\System32\\netcfg\\conhost.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\Temp\\MsEdgeCrashpad\\reports\\csrss.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\PerfLogs\\SearchApp.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Users\\Public\\Music\\dllhost.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\System32\\RestartTonight_80_contrast-white\\dllhost.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "\"C:\\Documents and Settings\\RuntimeBroker.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\Users\\Admin\\Music\\OfficeClickToRun.exe\""	fontreviewwinsvcrefPerfdll.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OfficeClickToRun = "\"C:\\fontreviewwinsvc\\OfficeClickToRun.exe\""	fontreviewwinsvcrefPerfdll.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\System32\RestartTonight_80_contrast-white\dllhost.exe	fontreviewwinsvcrefPerfdll.exe
File created	C:\Windows\System32\RestartTonight_80_contrast-white\5940a34987c99120d96dace90a3f93f329dcad63	fontreviewwinsvcrefPerfdll.exe
File created	C:\Windows\System32\netcfg\conhost.exe	fontreviewwinsvcrefPerfdll.exe
File created	C:\Windows\System32\netcfg\088424020bedd6b28ac7fd22ee35dcd7322895ce	fontreviewwinsvcrefPerfdll.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	JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	fontreviewwinsvcrefPerfdll.exe
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 9 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1556	schtasks.exe
4800	schtasks.exe
3460	schtasks.exe
4200	schtasks.exe
1704	schtasks.exe
2780	schtasks.exe
1308	schtasks.exe
4836	schtasks.exe
4948	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
1532	fontreviewwinsvcrefPerfdll.exe
1532	fontreviewwinsvcrefPerfdll.exe
1532	fontreviewwinsvcrefPerfdll.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe
2308	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1532	fontreviewwinsvcrefPerfdll.exe
Token: SeDebugPrivilege	2308	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 2488	4744	JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe	83
PID 4744 wrote to memory of 2488	4744	JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe	83
PID 4744 wrote to memory of 2488	4744	JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe	83
PID 2488 wrote to memory of 3016	2488	WScript.exe	84
PID 2488 wrote to memory of 3016	2488	WScript.exe	84
PID 2488 wrote to memory of 3016	2488	WScript.exe	84
PID 3016 wrote to memory of 1532	3016	cmd.exe	86
PID 3016 wrote to memory of 1532	3016	cmd.exe	86
PID 1532 wrote to memory of 2852	1532	fontreviewwinsvcrefPerfdll.exe	98
PID 1532 wrote to memory of 2852	1532	fontreviewwinsvcrefPerfdll.exe	98
PID 2852 wrote to memory of 2440	2852	cmd.exe	100
PID 2852 wrote to memory of 2440	2852	cmd.exe	100
PID 2852 wrote to memory of 2308	2852	cmd.exe	102
PID 2852 wrote to memory of 2308	2852	cmd.exe	102

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_a00b9106e0e0edaa5e6540711d67d08a.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a00b9106e0e0edaa5e6540711d67d08a.exe"
1⤵
- DcRat
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4744
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\fontreviewwinsvc\HZSUF0ENoqATgs2xuBB5SnvQ30qsZ.vbe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2488
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\fontreviewwinsvc\JAvevGsJOHZ7p.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3016
  - - C:\fontreviewwinsvc\fontreviewwinsvcrefPerfdll.exe
      "C:\fontreviewwinsvc\fontreviewwinsvcrefPerfdll.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Modifies registry class
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1532
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\oEXmMPyoVa.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2852
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:2440
      - C:\Documents and Settings\RuntimeBroker.exe
        
        "C:\Documents and Settings\RuntimeBroker.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Users\Admin\Music\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1308

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Public\Music\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\fontreviewwinsvc\OfficeClickToRun.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4800

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Documents and Settings\RuntimeBroker.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4836

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\RestartTonight_80_contrast-white\dllhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\taskhostw.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3460

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Windows\System32\netcfg\conhost.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4200

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\Temp\MsEdgeCrashpad\reports\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\PerfLogs\SearchApp.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\oEXmMPyoVa.bat

Filesize
207B

MD5
939e446511beb07f0e3a6b93007cdf7b

SHA1
da96cd1d42884dbee5880cdc5a7c931c42999e1f

SHA256
80463c7346abf9bd26b86f72bdd35b973cc819e2328325cf0579b7baeeb88f73

SHA512
6761e0c633a007dfc091b8867de75ed27dcec2b740a9ec0af52ac8f0659da7d6c9f79284fb22701fab2f8c1e87cf981befc75ff094af0fddb588eeae01c5e173

Download Submit
C:\fontreviewwinsvc\HZSUF0ENoqATgs2xuBB5SnvQ30qsZ.vbe

Filesize
206B

MD5
6516a4960a6cd91391f10cdd67452a43

SHA1
49df369838b52c8f393602685e3598474b0c8894

SHA256
e4eaa44532ad70a2f8f8f92b474a262a8f30eadbe46e9afcbc960be15dc32c53

SHA512
c3ccef7b360c776486e9d9173adef25a9022ad046f52dcbbe4ec56986d989e8bd5a1c0ff64cd68bd48065557cb505139a221d924c004086f2f821fb683147271

Download Submit
C:\fontreviewwinsvc\JAvevGsJOHZ7p.bat

Filesize
52B

MD5
22db99b6cb738df9778a2cbaea5c8d65

SHA1
317794f9120a203cef9d4a54c8b03a945a3e285b

SHA256
4af63f08cbfb0666776f281d9bc73c766d911580061048e59ea6ea7093d65f88

SHA512
8ab77efc664b9617e11dd707beea570960395a08b721bd2f81d9bfc3740e72b0ced58da3e5b870ca550435f3aec2df4e144a27d1fb9f001a41ec51f66a5afec9

Download Submit
C:\fontreviewwinsvc\fontreviewwinsvcrefPerfdll.exe

Filesize
1.0MB

MD5
193a3f45ff80ed77a5c041e5f1f1beb7

SHA1
7ff88a38ee281b02b7f5279d2cd801e647becd73

SHA256
03c5a982b0c3cd3144eaaff24b52a6480f4dc0680f0a006cf59f20565e7497ce

SHA512
20f067f2f552cd19f71519e86fc2b1f2dc7c31a7aa8c22400cba7a7a985b3c61ce659d1bfbf3762bb90ff451f8678d7c7d3a1c26f3280a9d7289c0fb8aa6218b

Download Submit
memory/1532-12-0x00007FF896B33000-0x00007FF896B35000-memory.dmp

Filesize
8KB

Download
memory/1532-13-0x0000000000E00000-0x0000000000F0C000-memory.dmp

Filesize
1.0MB

Download
memory/2308-41-0x000000001AF20000-0x000000001AF2C000-memory.dmp

Filesize
48KB

Download
memory/2308-42-0x000000001AF30000-0x000000001AF3E000-memory.dmp

Filesize
56KB

Download
memory/2308-43-0x000000001AF50000-0x000000001AF58000-memory.dmp

Filesize
32KB

Download
memory/2308-44-0x000000001AF40000-0x000000001AF48000-memory.dmp

Filesize
32KB

Download