dcrat | c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78

Analysis

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

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-12-2024 04:15

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General

Target

JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe
Size

1.3MB
MD5

032fd8766cb2ca7853ec975b1d30fa2b
SHA1

c2c30479ca22d458a2ce282d8c106e5ab43807dd
SHA256

c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78
SHA512

72dcea535b7230310de761f8a02696ec54e2108a41d15eb5d40626c55953867171862ebec49e57abcac67d893f714468551ba7d89ec03ab439e5d8e7a51ef232
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 12 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	2148	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2056	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1624	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2200	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2204	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2652	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	744	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2540	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1796	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1260	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2876	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1480	2676	schtasks.exe	34

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0007000000017472-9.dat	dcrat
behavioral1/memory/2580-13-0x0000000000D20000-0x0000000000E30000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2272	powershell.exe
2852	powershell.exe
2624	powershell.exe
2848	powershell.exe
572	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2580	DllCommonsvc.exe
1084	DllCommonsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
2796	cmd.exe
2796	cmd.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\MSBuild\conhost.exe	DllCommonsvc.exe
File created	C:\Program Files\MSBuild\088424020bedd6	DllCommonsvc.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\twain_32\csrss.exe	DllCommonsvc.exe
File created	C:\Windows\twain_32\886983d96e3d3e	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
744	schtasks.exe
1260	schtasks.exe
1480	schtasks.exe
2056	schtasks.exe
2200	schtasks.exe
2204	schtasks.exe
2652	schtasks.exe
2540	schtasks.exe
1796	schtasks.exe
2876	schtasks.exe
2148	schtasks.exe
1624	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2580	DllCommonsvc.exe
572	powershell.exe
2272	powershell.exe
2848	powershell.exe
2852	powershell.exe
2624	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2580	DllCommonsvc.exe
Token: SeDebugPrivilege	572	powershell.exe
Token: SeDebugPrivilege	2272	powershell.exe
Token: SeDebugPrivilege	2848	powershell.exe
Token: SeDebugPrivilege	2852	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	1084	DllCommonsvc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2776	2180	JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe	30
PID 2180 wrote to memory of 2776	2180	JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe	30
PID 2180 wrote to memory of 2776	2180	JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe	30
PID 2180 wrote to memory of 2776	2180	JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe	30
PID 2776 wrote to memory of 2796	2776	WScript.exe	31
PID 2776 wrote to memory of 2796	2776	WScript.exe	31
PID 2776 wrote to memory of 2796	2776	WScript.exe	31
PID 2776 wrote to memory of 2796	2776	WScript.exe	31
PID 2796 wrote to memory of 2580	2796	cmd.exe	33
PID 2796 wrote to memory of 2580	2796	cmd.exe	33
PID 2796 wrote to memory of 2580	2796	cmd.exe	33
PID 2796 wrote to memory of 2580	2796	cmd.exe	33
PID 2580 wrote to memory of 2624	2580	DllCommonsvc.exe	47
PID 2580 wrote to memory of 2624	2580	DllCommonsvc.exe	47
PID 2580 wrote to memory of 2624	2580	DllCommonsvc.exe	47
PID 2580 wrote to memory of 2848	2580	DllCommonsvc.exe	48
PID 2580 wrote to memory of 2848	2580	DllCommonsvc.exe	48
PID 2580 wrote to memory of 2848	2580	DllCommonsvc.exe	48
PID 2580 wrote to memory of 572	2580	DllCommonsvc.exe	49
PID 2580 wrote to memory of 572	2580	DllCommonsvc.exe	49
PID 2580 wrote to memory of 572	2580	DllCommonsvc.exe	49
PID 2580 wrote to memory of 2852	2580	DllCommonsvc.exe	50
PID 2580 wrote to memory of 2852	2580	DllCommonsvc.exe	50
PID 2580 wrote to memory of 2852	2580	DllCommonsvc.exe	50
PID 2580 wrote to memory of 2272	2580	DllCommonsvc.exe	52
PID 2580 wrote to memory of 2272	2580	DllCommonsvc.exe	52
PID 2580 wrote to memory of 2272	2580	DllCommonsvc.exe	52
PID 2580 wrote to memory of 1084	2580	DllCommonsvc.exe	57
PID 2580 wrote to memory of 1084	2580	DllCommonsvc.exe	57
PID 2580 wrote to memory of 1084	2580	DllCommonsvc.exe	57

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_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c994fc5bd1c3b7fee448afd3ed85e85141d57febc9f25d43c23ae2bc5744db78.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2180
- 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:2776
- - 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:2796
  - - 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:2580
    - - 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:2624
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Default User\spoolsv.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2848
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\Cookies\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:572
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\MSBuild\conhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2852
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\twain_32\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2272
    - - C:\providercommon\DllCommonsvc.exe
        
        "C:\providercommon\DllCommonsvc.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1084

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\spoolsv.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Users\Default User\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1624

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Cookies\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2200

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Admin\Cookies\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2204

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Users\Admin\Cookies\csrss.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 "conhostc" /sc MINUTE /mo 6 /tr "'C:\Program Files\MSBuild\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:744

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Program Files\MSBuild\conhost.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 "conhostc" /sc MINUTE /mo 8 /tr "'C:\Program Files\MSBuild\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1796

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Windows\twain_32\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1260

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\twain_32\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2876

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 8 /tr "'C:\Windows\twain_32\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1480

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
11176cc71670a4cf9601a29fad4efb85

SHA1
f86e42b3553f7e945b1999f54ffa6b24f1eb0432

SHA256
efb5bfa4652a752c7b921e8044e93832addf207a6fe6ade0f1c58115ece7e9cf

SHA512
27cb82fc3c549f8ba979749fb0d715ad067ae1776391dbb0d15469eea51ba1b47d593d76672fe48043af51f3f53d90c1efd650b6d56e1710a76bb99492b64636

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/572-46-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download
memory/2580-13-0x0000000000D20000-0x0000000000E30000-memory.dmp

Filesize
1.1MB

Download
memory/2580-14-0x0000000000440000-0x0000000000452000-memory.dmp

Filesize
72KB

Download
memory/2580-15-0x0000000000460000-0x000000000046C000-memory.dmp

Filesize
48KB

Download
memory/2580-16-0x0000000000450000-0x000000000045C000-memory.dmp

Filesize
48KB

Download
memory/2580-17-0x00000000006D0000-0x00000000006DC000-memory.dmp

Filesize
48KB

Download
memory/2848-47-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download