dcrat | c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32

Analysis

max time kernel
118s
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 05:47

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General

Target

JaffaCakes118_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe
Size

1.3MB
MD5

9c6ab217ef1c1f522ff288427d6d9d9f
SHA1

5984433b1816ad681322ba50b4929e8f74ec074a
SHA256

c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32
SHA512

f6906e3022fbb7ca64c88d95b2608c6652ad9b07746854f7fcc84e26d5e18b6e4d2a1ae8237697f94a44e1ae3063c90899e114c419797e07feec0ad2a1636a8d
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	2828	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2888	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2792	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2616	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2564	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2600	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2348	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1992	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1056	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1520	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1148	2892	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2512	2892	schtasks.exe	35

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000700000001868b-10.dat	dcrat
behavioral1/memory/2760-13-0x0000000001120000-0x0000000001230000-memory.dmp	dcrat
behavioral1/memory/1480-59-0x0000000000FC0000-0x00000000010D0000-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
1664	powershell.exe
1672	powershell.exe
1372	powershell.exe
1712	powershell.exe
2540	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2760	DllCommonsvc.exe
1480	wininit.exe

Loads dropped DLL 2 IoCs

pid	Process
2300	cmd.exe
2300	cmd.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files\Windows Journal\es-ES\wininit.exe	DllCommonsvc.exe
File created	C:\Program Files\Windows Journal\es-ES\56085415360792	DllCommonsvc.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\System.exe	DllCommonsvc.exe
File created	C:\Program Files (x86)\Windows NT\Accessories\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_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.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 12 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2512	schtasks.exe
2828	schtasks.exe
2888	schtasks.exe
2792	schtasks.exe
2616	schtasks.exe
2600	schtasks.exe
1992	schtasks.exe
1148	schtasks.exe
2564	schtasks.exe
2348	schtasks.exe
1056	schtasks.exe
1520	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2760	DllCommonsvc.exe
1372	powershell.exe
2540	powershell.exe
1664	powershell.exe
1712	powershell.exe
1672	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	DllCommonsvc.exe
Token: SeDebugPrivilege	1372	powershell.exe
Token: SeDebugPrivilege	2540	powershell.exe
Token: SeDebugPrivilege	1664	powershell.exe
Token: SeDebugPrivilege	1712	powershell.exe
Token: SeDebugPrivilege	1672	powershell.exe
Token: SeDebugPrivilege	1480	wininit.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 3016 wrote to memory of 1736	3016	JaffaCakes118_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe	31
PID 3016 wrote to memory of 1736	3016	JaffaCakes118_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe	31
PID 3016 wrote to memory of 1736	3016	JaffaCakes118_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe	31
PID 3016 wrote to memory of 1736	3016	JaffaCakes118_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe	31
PID 1736 wrote to memory of 2300	1736	WScript.exe	32
PID 1736 wrote to memory of 2300	1736	WScript.exe	32
PID 1736 wrote to memory of 2300	1736	WScript.exe	32
PID 1736 wrote to memory of 2300	1736	WScript.exe	32
PID 2300 wrote to memory of 2760	2300	cmd.exe	34
PID 2300 wrote to memory of 2760	2300	cmd.exe	34
PID 2300 wrote to memory of 2760	2300	cmd.exe	34
PID 2300 wrote to memory of 2760	2300	cmd.exe	34
PID 2760 wrote to memory of 1712	2760	DllCommonsvc.exe	48
PID 2760 wrote to memory of 1712	2760	DllCommonsvc.exe	48
PID 2760 wrote to memory of 1712	2760	DllCommonsvc.exe	48
PID 2760 wrote to memory of 1372	2760	DllCommonsvc.exe	49
PID 2760 wrote to memory of 1372	2760	DllCommonsvc.exe	49
PID 2760 wrote to memory of 1372	2760	DllCommonsvc.exe	49
PID 2760 wrote to memory of 1672	2760	DllCommonsvc.exe	50
PID 2760 wrote to memory of 1672	2760	DllCommonsvc.exe	50
PID 2760 wrote to memory of 1672	2760	DllCommonsvc.exe	50
PID 2760 wrote to memory of 2540	2760	DllCommonsvc.exe	51
PID 2760 wrote to memory of 2540	2760	DllCommonsvc.exe	51
PID 2760 wrote to memory of 2540	2760	DllCommonsvc.exe	51
PID 2760 wrote to memory of 1664	2760	DllCommonsvc.exe	52
PID 2760 wrote to memory of 1664	2760	DllCommonsvc.exe	52
PID 2760 wrote to memory of 1664	2760	DllCommonsvc.exe	52
PID 2760 wrote to memory of 772	2760	DllCommonsvc.exe	58
PID 2760 wrote to memory of 772	2760	DllCommonsvc.exe	58
PID 2760 wrote to memory of 772	2760	DllCommonsvc.exe	58
PID 772 wrote to memory of 408	772	cmd.exe	60
PID 772 wrote to memory of 408	772	cmd.exe	60
PID 772 wrote to memory of 408	772	cmd.exe	60
PID 772 wrote to memory of 1480	772	cmd.exe	61
PID 772 wrote to memory of 1480	772	cmd.exe	61
PID 772 wrote to memory of 1480	772	cmd.exe	61

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_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c86d08dc9ce5f1fc7a6522655457107e8665ad3c6659fa975bac01a852f95f32.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3016
- 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:1736
- - 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:2300
  - - 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:2760
    - - 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:1712
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\providercommon\lsm.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1372
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\MSOCache\All Users\WMIADAP.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1672
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files\Windows Journal\es-ES\wininit.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2540
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Windows NT\Accessories\System.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1664
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\BYExby0InI.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:772
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:408
      - C:\Program Files\Windows Journal\es-ES\wininit.exe
        
        "C:\Program Files\Windows Journal\es-ES\wininit.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 10 /tr "'C:\providercommon\lsm.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2828

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\providercommon\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2888

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsml" /sc MINUTE /mo 12 /tr "'C:\providercommon\lsm.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\WMIADAP.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2616

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAP" /sc ONLOGON /tr "'C:\MSOCache\All Users\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2564

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WMIADAPW" /sc MINUTE /mo 8 /tr "'C:\MSOCache\All Users\WMIADAP.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2600

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Program Files\Windows Journal\es-ES\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2348

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Program Files\Windows Journal\es-ES\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1992

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Program Files\Windows Journal\es-ES\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1056

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Windows NT\Accessories\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1520

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows NT\Accessories\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1148

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Windows NT\Accessories\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2512

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\Local\Temp\BYExby0InI.bat

Filesize
215B

MD5
04f22be2bf6e92a4fd5f11e8c2d38fea

SHA1
2dfc21d572dd12ebfdca81b2072e22bdc859ee65

SHA256
dcfeb5e907314cd99b83e4698ce7e7cb79d5d7d67f3cd456d81f0e30937fcb95

SHA512
ec29bc040d3f723525ad2aca77b79c16410017f94f760f5c03710a44cfd25d1bfaebd0e3605c96ed2a06f1a959174dbd29c117fb698918373dab385dfe3bf787

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\W76PSIE1S899H2CGUUR5.temp

Filesize
7KB

MD5
deb03de5cce133d5a194eb88e7b611b5

SHA1
a40e295a308da6e1e0dc4081a997edf35afe5bac

SHA256
2b4bd46045f3a3d3bac142069e14294258adeaa880bb0571c8823541d116f446

SHA512
eb800adc0bf8b241ec7585ae6dbcd8f68bbfceb856bd8d4d344edefca43b0858346472babcf635bd947acd0eaeb6fb68c325cf3aa215be3ddceea8b20fb32d16

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/1480-59-0x0000000000FC0000-0x00000000010D0000-memory.dmp

Filesize
1.1MB

Download
memory/2540-55-0x0000000002610000-0x0000000002618000-memory.dmp

Filesize
32KB

Download
memory/2540-49-0x000000001B510000-0x000000001B7F2000-memory.dmp

Filesize
2.9MB

Download
memory/2760-13-0x0000000001120000-0x0000000001230000-memory.dmp

Filesize
1.1MB

Download
memory/2760-17-0x0000000000400000-0x000000000040C000-memory.dmp

Filesize
48KB

Download
memory/2760-16-0x00000000003F0000-0x00000000003FC000-memory.dmp

Filesize
48KB

Download
memory/2760-15-0x00000000003E0000-0x00000000003EC000-memory.dmp

Filesize
48KB

Download
memory/2760-14-0x00000000003D0000-0x00000000003E2000-memory.dmp

Filesize
72KB

Download