dcrat | 4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 00:14

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General

Target

JaffaCakes118_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe
Size

1.3MB
MD5

23dadb718a8ca4225f1a0e672382b741
SHA1

611925ad062bf8469ac0fae2cc32a75cf8826234
SHA256

4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1
SHA512

0fafb7d98cb5666d92f2a306981b4535ff13791e8365e3ab554108135b2d192ed3e5e6a61c85b6496619458aefcb3f7f9cfe66bd0b84593cd231e3d4bcce4804
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 15 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	1612	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1124	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1700	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2968	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2148	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2640	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2064	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3000	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	604	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2924	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2832	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2912	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2900	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1444	2156	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2720	2156	schtasks.exe	35

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000015d07-9.dat	dcrat
behavioral1/memory/2108-13-0x0000000000AA0000-0x0000000000BB0000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3056	powershell.exe
344	powershell.exe
1248	powershell.exe
3048	powershell.exe
1840	powershell.exe
992	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2108	DllCommonsvc.exe
2188	DllCommonsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
2960	cmd.exe
2960	cmd.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Google\CrashReports\Idle.exe	DllCommonsvc.exe
File created	C:\Program Files (x86)\Google\CrashReports\6ccacd8608530f	DllCommonsvc.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\IME\IMESC5\HELP\System.exe	DllCommonsvc.exe
File created	C:\Windows\IME\IMESC5\HELP\27d1bcfc3c54e0	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_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.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 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2968	schtasks.exe
2148	schtasks.exe
2720	schtasks.exe
1612	schtasks.exe
1124	schtasks.exe
604	schtasks.exe
2912	schtasks.exe
1700	schtasks.exe
2924	schtasks.exe
2832	schtasks.exe
2900	schtasks.exe
2640	schtasks.exe
2064	schtasks.exe
3000	schtasks.exe
1444	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2108	DllCommonsvc.exe
1840	powershell.exe
3056	powershell.exe
992	powershell.exe
344	powershell.exe
1248	powershell.exe
3048	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2108	DllCommonsvc.exe
Token: SeDebugPrivilege	1840	powershell.exe
Token: SeDebugPrivilege	3056	powershell.exe
Token: SeDebugPrivilege	992	powershell.exe
Token: SeDebugPrivilege	344	powershell.exe
Token: SeDebugPrivilege	1248	powershell.exe
Token: SeDebugPrivilege	3048	powershell.exe
Token: SeDebugPrivilege	2188	DllCommonsvc.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 2668	2692	JaffaCakes118_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe	31
PID 2692 wrote to memory of 2668	2692	JaffaCakes118_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe	31
PID 2692 wrote to memory of 2668	2692	JaffaCakes118_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe	31
PID 2692 wrote to memory of 2668	2692	JaffaCakes118_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe	31
PID 2668 wrote to memory of 2960	2668	WScript.exe	32
PID 2668 wrote to memory of 2960	2668	WScript.exe	32
PID 2668 wrote to memory of 2960	2668	WScript.exe	32
PID 2668 wrote to memory of 2960	2668	WScript.exe	32
PID 2960 wrote to memory of 2108	2960	cmd.exe	34
PID 2960 wrote to memory of 2108	2960	cmd.exe	34
PID 2960 wrote to memory of 2108	2960	cmd.exe	34
PID 2960 wrote to memory of 2108	2960	cmd.exe	34
PID 2108 wrote to memory of 992	2108	DllCommonsvc.exe	51
PID 2108 wrote to memory of 992	2108	DllCommonsvc.exe	51
PID 2108 wrote to memory of 992	2108	DllCommonsvc.exe	51
PID 2108 wrote to memory of 3056	2108	DllCommonsvc.exe	52
PID 2108 wrote to memory of 3056	2108	DllCommonsvc.exe	52
PID 2108 wrote to memory of 3056	2108	DllCommonsvc.exe	52
PID 2108 wrote to memory of 344	2108	DllCommonsvc.exe	53
PID 2108 wrote to memory of 344	2108	DllCommonsvc.exe	53
PID 2108 wrote to memory of 344	2108	DllCommonsvc.exe	53
PID 2108 wrote to memory of 1248	2108	DllCommonsvc.exe	54
PID 2108 wrote to memory of 1248	2108	DllCommonsvc.exe	54
PID 2108 wrote to memory of 1248	2108	DllCommonsvc.exe	54
PID 2108 wrote to memory of 3048	2108	DllCommonsvc.exe	55
PID 2108 wrote to memory of 3048	2108	DllCommonsvc.exe	55
PID 2108 wrote to memory of 3048	2108	DllCommonsvc.exe	55
PID 2108 wrote to memory of 1840	2108	DllCommonsvc.exe	56
PID 2108 wrote to memory of 1840	2108	DllCommonsvc.exe	56
PID 2108 wrote to memory of 1840	2108	DllCommonsvc.exe	56
PID 2108 wrote to memory of 2188	2108	DllCommonsvc.exe	60
PID 2108 wrote to memory of 2188	2108	DllCommonsvc.exe	60
PID 2108 wrote to memory of 2188	2108	DllCommonsvc.exe	60

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_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4fc1a17a3ee5a9a7ccf0986456e56a26a238620c79bd8da47e7daec3c49daef1.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2692
- 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:2668
- - 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:2960
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2108
    - - 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:992
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Public\dllhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3056
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\IME\IMESC5\HELP\System.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:344
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\dllhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1248
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\All Users\Documents\cmd.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3048
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Google\CrashReports\Idle.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1840
    - - C:\providercommon\DllCommonsvc.exe
        
        "C:\providercommon\DllCommonsvc.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2188

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Users\Public\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1612

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Public\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1124

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 10 /tr "'C:\Users\Public\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1700

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 10 /tr "'C:\Windows\IME\IMESC5\HELP\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2968

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Windows\IME\IMESC5\HELP\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 13 /tr "'C:\Windows\IME\IMESC5\HELP\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2640

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\providercommon\dllhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\providercommon\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3000

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\providercommon\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:604

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Documents\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2924

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Users\All Users\Documents\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2832

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Documents\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2912

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Google\CrashReports\Idle.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\CrashReports\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1444

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "IdleI" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Google\CrashReports\Idle.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2720

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

Replay Monitor

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Downloads

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

Filesize
7KB

MD5
46a6a0d32bee8277db0ff8cd5267affe

SHA1
3293f0a9d6dc20eb5b6671b86c3389e59b62e585

SHA256
8b0c3f042b39d8ff2afcfb4aa509f7947c7431ed8b668cf5c14165d6b0740c7d

SHA512
acf5446ed171396e582c1726d141289d829d4b9485b94a2ab9079d92600a8c92dad78a4b9b0bbfce54ca874ecf9367665dca36b214ae9443da7c20e7fbc4081a

Download Submit
C:\providercommon\1zu9dW.bat

Filesize
36B

MD5
6783c3ee07c7d151ceac57f1f9c8bed7

SHA1
17468f98f95bf504cc1f83c49e49a78526b3ea03

SHA256
8ab782f0f327a2021530e7230d3aee8abbecb7eed59482a3a46e78b9e3862322

SHA512
c6012d4bfac1ed14d0fd9f0eabd0e1c3d647b343db292a907b246271d52a4b7469c809db43910ddba2e8c5045f9cb3d24d0af62d363281e6cb8b39ee94a183e8

Download Submit
C:\providercommon\yTUdeXjbLOhnrN32dgrxVg.vbe

Filesize
197B

MD5
8088241160261560a02c84025d107592

SHA1
083121f7027557570994c9fc211df61730455bb5

SHA256
2072cc9a4a3b84d4c5178ab41c5588eea7d0103e3928e34d64f17bf97f3d1cc1

SHA512
20d9369dd359315848ea30144383a0bb479d86059fdbc3b3256ac84f998193512feb3b1799ab663619920c99fe7e0ebba33ada31a3855094b956fcd351c90478

Download Submit
\providercommon\DllCommonsvc.exe

Filesize
1.0MB

MD5
bd31e94b4143c4ce49c17d3af46bcad0

SHA1
f8c51ff3ff909531d9469d4ba1bbabae101853ff

SHA256
b5199d3eb28e7de8ec4a5de66cb339a03d90b297e2292473badaab98ade15c63

SHA512
f96658bd19b672fd84038bd7e95c89e14f4e6f84e3ce9c6fe3216861a41203406148c6a809c2ab350d0d6c5919c845f619deb1fc9b1f1814dfce87e566bc2394

Download Submit
memory/1840-49-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2108-13-0x0000000000AA0000-0x0000000000BB0000-memory.dmp

Filesize
1.1MB

Download
memory/2108-14-0x00000000006D0000-0x00000000006E2000-memory.dmp

Filesize
72KB

Download
memory/2108-15-0x00000000006F0000-0x00000000006FC000-memory.dmp

Filesize
48KB

Download
memory/2108-16-0x00000000006E0000-0x00000000006EC000-memory.dmp

Filesize
48KB

Download
memory/2108-17-0x00000000008A0000-0x00000000008AC000-memory.dmp

Filesize
48KB

Download
memory/3056-43-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download