dcrat | 0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe

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
22-12-2024 07:51

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General

Target

JaffaCakes118_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe
Size

1.3MB
MD5

b2525ad19d80af9f37a4604452545e37
SHA1

4c99e6c00a5e5556329822f57435a4f305bafb66
SHA256

0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe
SHA512

d00a7f88be3d6b76b2d070e43adad2cd81181ab5fe4ee615cf65678e76544e0c61d83394037e2119b2e325c4d90dfb0ff4a12b3bf5c0df170fc8e541d75404a2
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	2300	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2628	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2856	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2608	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2540	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2728	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2212	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1436	572	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1484	572	schtasks.exe	35

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000016d68-9.dat	dcrat
behavioral1/memory/2716-13-0x00000000002E0000-0x00000000003F0000-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
272	powershell.exe
764	powershell.exe
1984	powershell.exe
1764	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2716	DllCommonsvc.exe
1792	DllCommonsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
1740	cmd.exe
1740	cmd.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\7-Zip\Lang\cmd.exe	DllCommonsvc.exe
File created	C:\Program Files\7-Zip\Lang\ebf1f9fa8afd6d	DllCommonsvc.exe

Drops file in Windows directory 5 IoCs

description	ioc	Process
File created	C:\Windows\DigitalLocker\es-ES\886983d96e3d3e	DllCommonsvc.exe
File created	C:\Windows\Globalization\MCT\MCT-CA\Theme\smss.exe	DllCommonsvc.exe
File created	C:\Windows\Globalization\MCT\MCT-CA\Theme\69ddcba757bf72	DllCommonsvc.exe
File created	C:\Windows\DigitalLocker\es-ES\csrss.exe	DllCommonsvc.exe
File opened for modification	C:\Windows\DigitalLocker\es-ES\csrss.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_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.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
2540	schtasks.exe
2300	schtasks.exe
2628	schtasks.exe
2856	schtasks.exe
1436	schtasks.exe
1484	schtasks.exe
2608	schtasks.exe
2728	schtasks.exe
2212	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2716	DllCommonsvc.exe
2716	DllCommonsvc.exe
2716	DllCommonsvc.exe
764	powershell.exe
1764	powershell.exe
1984	powershell.exe
272	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2716	DllCommonsvc.exe
Token: SeDebugPrivilege	1792	DllCommonsvc.exe
Token: SeDebugPrivilege	764	powershell.exe
Token: SeDebugPrivilege	1764	powershell.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	272	powershell.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 3016	2376	JaffaCakes118_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe	31
PID 2376 wrote to memory of 3016	2376	JaffaCakes118_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe	31
PID 2376 wrote to memory of 3016	2376	JaffaCakes118_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe	31
PID 2376 wrote to memory of 3016	2376	JaffaCakes118_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe	31
PID 3016 wrote to memory of 1740	3016	WScript.exe	32
PID 3016 wrote to memory of 1740	3016	WScript.exe	32
PID 3016 wrote to memory of 1740	3016	WScript.exe	32
PID 3016 wrote to memory of 1740	3016	WScript.exe	32
PID 1740 wrote to memory of 2716	1740	cmd.exe	34
PID 1740 wrote to memory of 2716	1740	cmd.exe	34
PID 1740 wrote to memory of 2716	1740	cmd.exe	34
PID 1740 wrote to memory of 2716	1740	cmd.exe	34
PID 2716 wrote to memory of 272	2716	DllCommonsvc.exe	45
PID 2716 wrote to memory of 272	2716	DllCommonsvc.exe	45
PID 2716 wrote to memory of 272	2716	DllCommonsvc.exe	45
PID 2716 wrote to memory of 764	2716	DllCommonsvc.exe	46
PID 2716 wrote to memory of 764	2716	DllCommonsvc.exe	46
PID 2716 wrote to memory of 764	2716	DllCommonsvc.exe	46
PID 2716 wrote to memory of 1764	2716	DllCommonsvc.exe	47
PID 2716 wrote to memory of 1764	2716	DllCommonsvc.exe	47
PID 2716 wrote to memory of 1764	2716	DllCommonsvc.exe	47
PID 2716 wrote to memory of 1984	2716	DllCommonsvc.exe	48
PID 2716 wrote to memory of 1984	2716	DllCommonsvc.exe	48
PID 2716 wrote to memory of 1984	2716	DllCommonsvc.exe	48
PID 2716 wrote to memory of 1792	2716	DllCommonsvc.exe	53
PID 2716 wrote to memory of 1792	2716	DllCommonsvc.exe	53
PID 2716 wrote to memory of 1792	2716	DllCommonsvc.exe	53

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_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0e5b5bead98e249b9fba586ea14b2f0892a02ef3824496a27e03e5b1195669fe.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2376
- 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:3016
- - 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:1740
  - - 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:2716
    - - 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:272
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\DigitalLocker\es-ES\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:764
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Globalization\MCT\MCT-CA\Theme\smss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1764
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\7-Zip\Lang\cmd.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1984
    - - C:\providercommon\DllCommonsvc.exe
        
        "C:\providercommon\DllCommonsvc.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\Windows\DigitalLocker\es-ES\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2300

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\DigitalLocker\es-ES\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2628

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Windows\DigitalLocker\es-ES\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2856

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 10 /tr "'C:\Windows\Globalization\MCT\MCT-CA\Theme\smss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2608

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\Globalization\MCT\MCT-CA\Theme\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2540

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Windows\Globalization\MCT\MCT-CA\Theme\smss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2728

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Program Files\7-Zip\Lang\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Program Files\7-Zip\Lang\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1436

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 8 /tr "'C:\Program Files\7-Zip\Lang\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1484

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
f986671d483c6a609f22da74cf4c852e

SHA1
30fa3336ca5e2fb53cdccbe602770958e8396321

SHA256
588be526dfafaf5a38f54aa5e77f4d9850c2741e854a4ea193c3effd24253b55

SHA512
1242a6a624f111b5a2cccd355dce8e994aa449cf3f86d6ac1030e325ee9e30a215b0391b88b9fb8e7c1b426ec28221ff9d80abc604a2ab76e1d8e485f650f6d8

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/764-42-0x0000000002620000-0x0000000002628000-memory.dmp

Filesize
32KB

Download
memory/1984-41-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2716-13-0x00000000002E0000-0x00000000003F0000-memory.dmp

Filesize
1.1MB

Download
memory/2716-14-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/2716-15-0x00000000006C0000-0x00000000006CC000-memory.dmp

Filesize
48KB

Download
memory/2716-16-0x00000000006B0000-0x00000000006BC000-memory.dmp

Filesize
48KB

Download
memory/2716-17-0x00000000006D0000-0x00000000006DC000-memory.dmp

Filesize
48KB

Download