dcrat | 796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012

General

Target

JaffaCakes118_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe
Size

1.3MB
MD5

76f57cdae6224f6d655996f2953535b5
SHA1

30feb1edd193e937514586430b792b508eac1a0c
SHA256

796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012
SHA512

fe5eb19e3b84a78a8a198e075d4858f986302d9e1b13ca32285ec3b5b751ce6201e4e22ae2d657c435020ac261fbc69424099f7f0d7aba83ffbb88df0eb687fd
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 6 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	2844	2644	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2860	2644	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2556	2644	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2704	2644	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2532	2644	schtasks.exe	35
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2592	2644	schtasks.exe	35

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x0008000000018bf3-9.dat	dcrat
behavioral1/memory/1072-13-0x0000000000380000-0x0000000000490000-memory.dmp	dcrat
behavioral1/memory/2264-28-0x0000000000E80000-0x0000000000F90000-memory.dmp	dcrat

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3020	powershell.exe
2612	powershell.exe
2584	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
1072	DllCommonsvc.exe
2264	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
1768	cmd.exe
1768	cmd.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Branding\Basebrd\it-IT\886983d96e3d3e	DllCommonsvc.exe
File created	C:\Windows\Branding\Basebrd\it-IT\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_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.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 6 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2592	schtasks.exe
2844	schtasks.exe
2860	schtasks.exe
2556	schtasks.exe
2704	schtasks.exe
2532	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1072	DllCommonsvc.exe
3020	powershell.exe
2584	powershell.exe
2612	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1072	DllCommonsvc.exe
Token: SeDebugPrivilege	2264	csrss.exe
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	2612	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 1972	3048	JaffaCakes118_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe	30
PID 3048 wrote to memory of 1972	3048	JaffaCakes118_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe	30
PID 3048 wrote to memory of 1972	3048	JaffaCakes118_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe	30
PID 3048 wrote to memory of 1972	3048	JaffaCakes118_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe	30
PID 1972 wrote to memory of 1768	1972	WScript.exe	31
PID 1972 wrote to memory of 1768	1972	WScript.exe	31
PID 1972 wrote to memory of 1768	1972	WScript.exe	31
PID 1972 wrote to memory of 1768	1972	WScript.exe	31
PID 1768 wrote to memory of 1072	1768	cmd.exe	33
PID 1768 wrote to memory of 1072	1768	cmd.exe	33
PID 1768 wrote to memory of 1072	1768	cmd.exe	33
PID 1768 wrote to memory of 1072	1768	cmd.exe	33
PID 1072 wrote to memory of 2612	1072	DllCommonsvc.exe	42
PID 1072 wrote to memory of 2612	1072	DllCommonsvc.exe	42
PID 1072 wrote to memory of 2612	1072	DllCommonsvc.exe	42
PID 1072 wrote to memory of 3020	1072	DllCommonsvc.exe	44
PID 1072 wrote to memory of 3020	1072	DllCommonsvc.exe	44
PID 1072 wrote to memory of 3020	1072	DllCommonsvc.exe	44
PID 1072 wrote to memory of 2584	1072	DllCommonsvc.exe	45
PID 1072 wrote to memory of 2584	1072	DllCommonsvc.exe	45
PID 1072 wrote to memory of 2584	1072	DllCommonsvc.exe	45
PID 1072 wrote to memory of 2264	1072	DllCommonsvc.exe	48
PID 1072 wrote to memory of 2264	1072	DllCommonsvc.exe	48
PID 1072 wrote to memory of 2264	1072	DllCommonsvc.exe	48

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_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_796fb13d4ec91acabb8ea8447699850ddbc189157e3a9a91c0477a5b83c72012.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3048
- 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:1972
- - 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:1768
  - - C:\providercommon\DllCommonsvc.exe
      "C:\providercommon\DllCommonsvc.exe"
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1072
    - - 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:2612
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\wininit.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3020
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Branding\Basebrd\it-IT\csrss.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2584
    - - C:\Windows\Branding\Basebrd\it-IT\csrss.exe
        
        "C:\Windows\Branding\Basebrd\it-IT\csrss.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:2264

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\wininit.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2844

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2860

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 8 /tr "'C:\Recovery\18fc4542-69f6-11ef-a46c-62cb582c238c\wininit.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2556

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Windows\Branding\Basebrd\it-IT\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\Branding\Basebrd\it-IT\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2532

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\Windows\Branding\Basebrd\it-IT\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
7KB

MD5
f691137a0d14236da852c549b69b1201

SHA1
f984b65b1465b9656eafc44509775455ba76337f

SHA256
0ed6a4f261bdc214eb32a44a451f6222b5d041a6e9158cdbf59a74f09eacad28

SHA512
653826367525ef2fecb61a66f7e95f9328df4b674d8fb186e934cd910c79c14cf89873d4f61f5b4cb824255870274fb825d1eb3986120e8c1026e7b514408bc3

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/1072-13-0x0000000000380000-0x0000000000490000-memory.dmp

Filesize
1.1MB

Download
memory/1072-14-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/1072-15-0x00000000002E0000-0x00000000002EC000-memory.dmp

Filesize
48KB

Download
memory/1072-16-0x0000000000370000-0x000000000037C000-memory.dmp

Filesize
48KB

Download
memory/1072-17-0x0000000000700000-0x000000000070C000-memory.dmp

Filesize
48KB

Download
memory/2264-28-0x0000000000E80000-0x0000000000F90000-memory.dmp

Filesize
1.1MB

Download
memory/2584-43-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/3020-44-0x0000000002A60000-0x0000000002A68000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads