dcrat | 08daa6de7fd43737def4dbe0950db36969476afd0fc819ba03d3601a2669f838

Analysis

max time kernel
121s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-01-2025 13:26

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General

Target

JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe
Size

2.3MB
MD5

a1d6722720a1d0faa60e5faaa6951e25
SHA1

8d32dba1594189b4b02632e583b2187d82564093
SHA256

08daa6de7fd43737def4dbe0950db36969476afd0fc819ba03d3601a2669f838
SHA512

d5a0fe3841f6fca72af1ebbb092fb32bbd4d29931dcabed881ffe6774b38a7c9595195b38655d497d214bc67f6ae962d25ec5231bad3acab98c564bf46e9fc6b
SSDEEP

49152:UbA300qL5o66QwgVAVph9QBoyycpwgPGdnDq3IEPs:UbV7oh9yycFODq3vPs

Score

10^/10

dcrat discovery infostealer persistence rat

Malware Config

Signatures

DcRat 11 IoCs

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

rat infostealer dcrat

description	ioc	pid	Process
		336	schtasks.exe
		2920	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language		JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe
		2960	schtasks.exe
		2616	schtasks.exe
		2688	schtasks.exe
		2852	schtasks.exe
		2788	schtasks.exe
		2192	schtasks.exe
		1572	schtasks.exe
		1768	schtasks.exe

Dcrat family
dcrat

Process spawned unexpected child process 10 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	2960	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2788	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2616	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2688	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2192	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1572	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2852	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	336	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2920	2776	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1768	2776	schtasks.exe	35

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000015cd1-9.dat	dcrat
behavioral1/memory/2756-13-0x0000000000E90000-0x00000000010A2000-memory.dmp	dcrat
behavioral1/memory/2948-46-0x0000000000F40000-0x0000000001152000-memory.dmp	dcrat

Executes dropped EXE 3 IoCs

pid	Process
2756	brokerDhcpdriverref.exe
1820	brokerDhcpdriverref.exe
2948	explorer.exe

Loads dropped DLL 2 IoCs

pid	Process
1052	cmd.exe
1052	cmd.exe

Adds Run key to start application 2 TTPs 10 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\sppsvc = "\"C:\\Windows\\System32\\C_10007\\sppsvc.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\twunk_16\\explorer.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\SecEdit\\lsass.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\explorer = "\"C:\\Windows\\win\\explorer.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsm = "\"C:\\Windows\\System32\\wsepno\\lsm.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\System32\\api-ms-win-core-misc-l1-1-0\\csrss.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\PerfLogs\\Admin\\wininit.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\provthrd\\services.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\ProgramData\\Microsoft\\User Account Pictures\\Default Pictures\\csrss.exe\""	brokerDhcpdriverref.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\services = "\"C:\\Windows\\System32\\NlsData0003\\services.exe\""	brokerDhcpdriverref.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\System32\SecEdit\6203df4a6bafc7c328ee7f6f8ca0a8a838a8a1b9	brokerDhcpdriverref.exe
File created	C:\Windows\System32\NlsData0003\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	brokerDhcpdriverref.exe
File created	C:\Windows\System32\wsepno\101b941d020240259ca4912829b53995ad543df6	brokerDhcpdriverref.exe
File created	C:\Windows\System32\api-ms-win-core-misc-l1-1-0\886983d96e3d3e31032c679b2d4ea91b6c05afef	brokerDhcpdriverref.exe
File created	C:\Windows\System32\C_10007\sppsvc.exe	brokerDhcpdriverref.exe
File created	C:\Windows\System32\C_10007\0a1fd5f707cd16ea89afd3d6db52b2da58214a6c	brokerDhcpdriverref.exe
File created	C:\Windows\System32\SecEdit\lsass.exe	brokerDhcpdriverref.exe
File created	C:\Windows\System32\NlsData0003\services.exe	brokerDhcpdriverref.exe
File created	C:\Windows\System32\wsepno\lsm.exe	brokerDhcpdriverref.exe
File created	C:\Windows\System32\api-ms-win-core-misc-l1-1-0\csrss.exe	brokerDhcpdriverref.exe
File created	C:\Windows\System32\provthrd\services.exe	brokerDhcpdriverref.exe
File created	C:\Windows\System32\provthrd\c5b4cb5e9653cce737f29f72ba880dd4c4bab27d	brokerDhcpdriverref.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\twunk_16\explorer.exe	brokerDhcpdriverref.exe
File created	C:\Windows\twunk_16\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	brokerDhcpdriverref.exe
File created	C:\Windows\win\explorer.exe	brokerDhcpdriverref.exe
File opened for modification	C:\Windows\win\explorer.exe	brokerDhcpdriverref.exe
File created	C:\Windows\win\7a0fd90576e08807bde2cc57bcf9854bbce05fe3	brokerDhcpdriverref.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 10 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2960	schtasks.exe
2788	schtasks.exe
2616	schtasks.exe
2192	schtasks.exe
1572	schtasks.exe
1768	schtasks.exe
2688	schtasks.exe
2852	schtasks.exe
336	schtasks.exe
2920	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2756	brokerDhcpdriverref.exe
1820	brokerDhcpdriverref.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe
2948	explorer.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2756	brokerDhcpdriverref.exe
Token: SeDebugPrivilege	1820	brokerDhcpdriverref.exe
Token: SeDebugPrivilege	2948	explorer.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1060 wrote to memory of 2216	1060	JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe	30
PID 1060 wrote to memory of 2216	1060	JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe	30
PID 1060 wrote to memory of 2216	1060	JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe	30
PID 1060 wrote to memory of 2216	1060	JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe	30
PID 2216 wrote to memory of 1052	2216	WScript.exe	32
PID 2216 wrote to memory of 1052	2216	WScript.exe	32
PID 2216 wrote to memory of 1052	2216	WScript.exe	32
PID 2216 wrote to memory of 1052	2216	WScript.exe	32
PID 1052 wrote to memory of 2756	1052	cmd.exe	34
PID 1052 wrote to memory of 2756	1052	cmd.exe	34
PID 1052 wrote to memory of 2756	1052	cmd.exe	34
PID 1052 wrote to memory of 2756	1052	cmd.exe	34
PID 2756 wrote to memory of 2144	2756	brokerDhcpdriverref.exe	43
PID 2756 wrote to memory of 2144	2756	brokerDhcpdriverref.exe	43
PID 2756 wrote to memory of 2144	2756	brokerDhcpdriverref.exe	43
PID 2144 wrote to memory of 2524	2144	cmd.exe	45
PID 2144 wrote to memory of 2524	2144	cmd.exe	45
PID 2144 wrote to memory of 2524	2144	cmd.exe	45
PID 2144 wrote to memory of 1820	2144	cmd.exe	46
PID 2144 wrote to memory of 1820	2144	cmd.exe	46
PID 2144 wrote to memory of 1820	2144	cmd.exe	46
PID 1820 wrote to memory of 2948	1820	brokerDhcpdriverref.exe	50
PID 1820 wrote to memory of 2948	1820	brokerDhcpdriverref.exe	50
PID 1820 wrote to memory of 2948	1820	brokerDhcpdriverref.exe	50

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_a1d6722720a1d0faa60e5faaa6951e25.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a1d6722720a1d0faa60e5faaa6951e25.exe"
1⤵
- DcRat
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1060
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\brokerDhcp\S0tGSQFMCx6Y.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2216
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\brokerDhcp\ZZ2hXACs.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1052
  - - C:\brokerDhcp\brokerDhcpdriverref.exe
      "C:\brokerDhcp\brokerDhcpdriverref.exe"
      4⤵
      Executes dropped EXE
      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:2756
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\zvYYbBujai.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2144
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:2524
      - C:\brokerDhcp\brokerDhcpdriverref.exe
        
        "C:\brokerDhcp\brokerDhcpdriverref.exe"
        6⤵
        Executes dropped EXE
        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:1820
        
        C:\Windows\win\explorer.exe
        
        "C:\Windows\win\explorer.exe"
        7⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2948

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\PerfLogs\Admin\wininit.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2960

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\C_10007\sppsvc.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2788

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\provthrd\services.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\ProgramData\Microsoft\User Account Pictures\Default Pictures\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\twunk_16\explorer.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2192

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\SecEdit\lsass.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1572

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Windows\System32\NlsData0003\services.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2852

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Windows\win\explorer.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:336

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Windows\System32\wsepno\lsm.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2920

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\api-ms-win-core-misc-l1-1-0\csrss.exe'" /rl HIGHEST /f
1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1768

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\zvYYbBujai.bat

Filesize
201B

MD5
ac1439d5f3c79bb986e1683fd16a039a

SHA1
b98428a85c87d72ec920befd1c3da6da22379771

SHA256
bdeb1c68ec7ca50e7e1c6d7cd1f746c3ca88b203ad93f110bd4864b2d38f169a

SHA512
93957572ab036b9efaaee3c053a42408ebdfdb959c3a19f7db06c1761c996689d1347a88d08ded4b1a773ab088150cc1de257babd6e40b67e5eb6f8ff1e5e44f

Download Submit
C:\brokerDhcp\S0tGSQFMCx6Y.vbe

Filesize
195B

MD5
0272bf47a2ead1950910e1629e35e5b5

SHA1
74b43b7ce5697d8bfddd3ed416b03ba61b81fbac

SHA256
45547e2ed9186e7405f394fe1e3b58d61106b205d78c3dcbe8f80dd0c8e13fdd

SHA512
9a02cb88ef7e8d1ee80e4c5cb6612d933b11ce8f63c6518ebe8a58bfdbd08046666a1ebedd509ad0a1b7652d361fbb610008835a823737cb7421d81e19104465

Download Submit
C:\brokerDhcp\ZZ2hXACs.bat

Filesize
39B

MD5
7336dff7322860e242cf39fd2067a903

SHA1
b97bdf53351221778777388168217a736b9670bc

SHA256
f875da2b44bb1c16ae7ad33e3ac89f235bd1c85445672e8ee092f1a540fd4cea

SHA512
fb5e86ca89e961c5df3d6a0e4e6d30b8ab7f5d4445efa71e7706ce86f3201267a3bd8b45af80d8f5a694e451cd0f0d51a70954e0a5f8d6aec0ee5bc31139a687

Download Submit
\brokerDhcp\brokerDhcpdriverref.exe

Filesize
2.0MB

MD5
c07cdd8d27b5b968b06166ceddcfd35a

SHA1
419905135ad7276f36edd5654ff50643875d52b3

SHA256
6b350fefc7d6ca79ca3e4cef39b4e71e7459d98ef213693ae3cec2c1b1d03863

SHA512
01ddba53ed10452aeefde7aa2bcb289d75d5ce90fe0771183d5abc5f3a178d20b5495381084e75e858130bf31dbdd33edf82d51c96d1e4a99ee4c21bf97327ed

Download Submit
memory/2756-13-0x0000000000E90000-0x00000000010A2000-memory.dmp

Filesize
2.1MB

Download
memory/2948-47-0x0000000000140000-0x000000000014E000-memory.dmp

Filesize
56KB

Download
memory/2948-46-0x0000000000F40000-0x0000000001152000-memory.dmp

Filesize
2.1MB

Download
memory/2948-48-0x00000000003B0000-0x0000000000406000-memory.dmp

Filesize
344KB

Download
memory/2948-49-0x0000000000150000-0x000000000015A000-memory.dmp

Filesize
40KB

Download
memory/2948-50-0x0000000000160000-0x0000000000168000-memory.dmp

Filesize
32KB

Download
memory/2948-51-0x0000000000170000-0x000000000017C000-memory.dmp

Filesize
48KB

Download
memory/2948-52-0x0000000000580000-0x0000000000588000-memory.dmp

Filesize
32KB

Download
memory/2948-53-0x00000000005A0000-0x00000000005A8000-memory.dmp

Filesize
32KB

Download