dcrat | ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 04:31

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General

Target

JaffaCakes118_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe
Size

1.3MB
MD5

f11424d834a1b9d294edd3956dcc039d
SHA1

5e615e6d197a81aba95f64c4bf6752f0299f8106
SHA256

ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e
SHA512

d0871d44a677d164d387d1695b866b4035c66d6a30202cd4772c2081e2f8135f78397a2febb2b817f72fcf76fd4c8fd446c5b8333d5cc983dddd4788f7a531b7
SSDEEP

24576:U2G/nvxW3Ww0t6TnzGmVBDh4+aknuRRZJND0gFJ4rD/IjC:UbA30GnzV/q+DnsXg

Score

10^/10

dcrat discovery execution infostealer 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 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	2700	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2784	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2608	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2676	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1180	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2212	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	768	2020	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1592	2020	schtasks.exe	34

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0007000000019345-12.dat	dcrat
behavioral1/memory/2756-13-0x0000000000840000-0x0000000000950000-memory.dmp	dcrat
behavioral1/memory/1752-52-0x0000000000180000-0x0000000000290000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1884	powershell.exe
1456	powershell.exe
1032	powershell.exe
1964	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2756	DllCommonsvc.exe
1752	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
1424	cmd.exe
1424	cmd.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Windows Mail\es-ES\services.exe	DllCommonsvc.exe
File created	C:\Program Files (x86)\Windows Mail\es-ES\c5b4cb5e9653cc	DllCommonsvc.exe
File created	C:\Program Files (x86)\Windows Mail\es-ES\services.exe	DllCommonsvc.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_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
2652	schtasks.exe
2608	schtasks.exe
2676	schtasks.exe
2700	schtasks.exe
1180	schtasks.exe
2212	schtasks.exe
768	schtasks.exe
1592	schtasks.exe
2784	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2756	DllCommonsvc.exe
1032	powershell.exe
1964	powershell.exe
1884	powershell.exe
1456	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2756	DllCommonsvc.exe
Token: SeDebugPrivilege	1032	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	1964	powershell.exe
Token: SeDebugPrivilege	1456	powershell.exe
Token: SeDebugPrivilege	1752	csrss.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2408 wrote to memory of 2192	2408	JaffaCakes118_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe	30
PID 2408 wrote to memory of 2192	2408	JaffaCakes118_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe	30
PID 2408 wrote to memory of 2192	2408	JaffaCakes118_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe	30
PID 2408 wrote to memory of 2192	2408	JaffaCakes118_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe	30
PID 2192 wrote to memory of 1424	2192	WScript.exe	31
PID 2192 wrote to memory of 1424	2192	WScript.exe	31
PID 2192 wrote to memory of 1424	2192	WScript.exe	31
PID 2192 wrote to memory of 1424	2192	WScript.exe	31
PID 1424 wrote to memory of 2756	1424	cmd.exe	33
PID 1424 wrote to memory of 2756	1424	cmd.exe	33
PID 1424 wrote to memory of 2756	1424	cmd.exe	33
PID 1424 wrote to memory of 2756	1424	cmd.exe	33
PID 2756 wrote to memory of 1456	2756	DllCommonsvc.exe	44
PID 2756 wrote to memory of 1456	2756	DllCommonsvc.exe	44
PID 2756 wrote to memory of 1456	2756	DllCommonsvc.exe	44
PID 2756 wrote to memory of 1032	2756	DllCommonsvc.exe	45
PID 2756 wrote to memory of 1032	2756	DllCommonsvc.exe	45
PID 2756 wrote to memory of 1032	2756	DllCommonsvc.exe	45
PID 2756 wrote to memory of 1884	2756	DllCommonsvc.exe	46
PID 2756 wrote to memory of 1884	2756	DllCommonsvc.exe	46
PID 2756 wrote to memory of 1884	2756	DllCommonsvc.exe	46
PID 2756 wrote to memory of 1964	2756	DllCommonsvc.exe	47
PID 2756 wrote to memory of 1964	2756	DllCommonsvc.exe	47
PID 2756 wrote to memory of 1964	2756	DllCommonsvc.exe	47
PID 2756 wrote to memory of 2136	2756	DllCommonsvc.exe	52
PID 2756 wrote to memory of 2136	2756	DllCommonsvc.exe	52
PID 2756 wrote to memory of 2136	2756	DllCommonsvc.exe	52
PID 2136 wrote to memory of 2296	2136	cmd.exe	54
PID 2136 wrote to memory of 2296	2136	cmd.exe	54
PID 2136 wrote to memory of 2296	2136	cmd.exe	54
PID 2136 wrote to memory of 1752	2136	cmd.exe	56
PID 2136 wrote to memory of 1752	2136	cmd.exe	56
PID 2136 wrote to memory of 1752	2136	cmd.exe	56

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_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ade858b8762b27a765373c956b238f83be288c5c7ce63f0e01e55e71a5e0fb1e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2408
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2192
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\providercommon\1zu9dW.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1424
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2756
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\DllCommonsvc.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1456
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows Mail\es-ES\services.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1032
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\services.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1884
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1964
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\DjfEt6epAa.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2136
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:2296
      - C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\csrss.exe
        
        "C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\csrss.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1752

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Mail\es-ES\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Mail\es-ES\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2652

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Mail\es-ES\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2784

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\services.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2676

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1180

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:768

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Recovery\8cdd6da2-3d81-11ef-9400-f2a3cf4ad94f\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\DjfEt6epAa.bat

Filesize
223B

MD5
2d15a708f6fa019f03d4dfabd1e773fb

SHA1
90f043f42fa458658e37fd755ab023df7f92a4a3

SHA256
88da3e5c629c0afc3e6f275d3e70206cb33d39c183e40e4583119c03bbec8dfd

SHA512
1d42299a38435797118777d1944a3ba5e997debea0933702d96cc04b6ad2fddc887f4644052297eb1c266d40ea81e17c73c97c928763d34ef087ad056029dc16

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
06184fcf4df345d92525c429ee27f312

SHA1
2a92d865aa3a63c354d733a574f57303218da6e5

SHA256
ac8cfa473f95bd70ecd28d8716c0bed85e505e86b8af5c66c0f8ceffedbe561b

SHA512
ff7c4169c691f8943bbda265d10dbcb0de9fb5b8dcf092f6b4adc0cc470ddb973f3c6a28ace4c3474360dbfb141086c38d536cd6777661fc4ea39718fcdb6da6

Download Submit
C:\providercommon\1zu9dW.bat

Filesize
36B

MD5
6783c3ee07c7d151ceac57f1f9c8bed7

SHA1
17468f98f95bf504cc1f83c49e49a78526b3ea03

SHA256
8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

SHA512
c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

Download Submit
C:\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

Filesize
197B

MD5
8088241160261560a02c84025d107592

SHA1
083121f7027557570994c9fc211df61730455bb5

SHA256
2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

SHA512
20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

Download Submit
memory/1032-48-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/1752-52-0x0000000000180000-0x0000000000290000-memory.dmp

Filesize
1.1MB

Download
memory/1964-49-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download
memory/2756-13-0x0000000000840000-0x0000000000950000-memory.dmp

Filesize
1.1MB

Download
memory/2756-17-0x0000000000360000-0x000000000036C000-memory.dmp

Filesize
48KB

Download
memory/2756-16-0x0000000000340000-0x000000000034C000-memory.dmp

Filesize
48KB

Download
memory/2756-15-0x0000000000350000-0x000000000035C000-memory.dmp

Filesize
48KB

Download
memory/2756-14-0x0000000000330000-0x0000000000342000-memory.dmp

Filesize
72KB

Download