dcrat | c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9

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 04:05

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General

Target

JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe
Size

1.3MB
MD5

0082087a3ff2f556c23be068d172cdb7
SHA1

d88b1d662cc2f2289e10d3c5379932d4b936c39b
SHA256

c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9
SHA512

bc70f22aeaf5713c0d333a9150a709c57dc30c5964682a3891846cc1ecfc425307392af726bae85ad4d3f5292e6fe72bda01607a94a5f53833a9ef08353634f4
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	2596	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2684	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2280	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	764	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2028	2676	schtasks.exe	34
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2228	2676	schtasks.exe	34

DCRat payload 2 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x000e000000018676-12.dat	dcrat
behavioral1/memory/2860-13-0x00000000010D0000-0x00000000011E0000-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
2308	powershell.exe
2524	powershell.exe
1172	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2860	DllCommonsvc.exe
1976	DllCommonsvc.exe

Loads dropped DLL 2 IoCs

pid	Process
2816	cmd.exe
2816	cmd.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Microsoft Visual Studio 8\WmiPrvSE.exe	DllCommonsvc.exe
File created	C:\Program Files (x86)\Microsoft Visual Studio 8\24dbde2999530e	DllCommonsvc.exe
File created	C:\Program Files (x86)\Microsoft Visual Studio 8\WmiPrvSE.exe	DllCommonsvc.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\conhost.exe	DllCommonsvc.exe
File created	C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\088424020bedd6	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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.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
2228	schtasks.exe
2596	schtasks.exe
2684	schtasks.exe
2280	schtasks.exe
764	schtasks.exe
2028	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2860	DllCommonsvc.exe
2524	powershell.exe
2308	powershell.exe
1172	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2860	DllCommonsvc.exe
Token: SeDebugPrivilege	2524	powershell.exe
Token: SeDebugPrivilege	2308	powershell.exe
Token: SeDebugPrivilege	1172	powershell.exe
Token: SeDebugPrivilege	1976	DllCommonsvc.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 1708	2344	JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe	30
PID 2344 wrote to memory of 1708	2344	JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe	30
PID 2344 wrote to memory of 1708	2344	JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe	30
PID 2344 wrote to memory of 1708	2344	JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe	30
PID 1708 wrote to memory of 2816	1708	WScript.exe	31
PID 1708 wrote to memory of 2816	1708	WScript.exe	31
PID 1708 wrote to memory of 2816	1708	WScript.exe	31
PID 1708 wrote to memory of 2816	1708	WScript.exe	31
PID 2816 wrote to memory of 2860	2816	cmd.exe	33
PID 2816 wrote to memory of 2860	2816	cmd.exe	33
PID 2816 wrote to memory of 2860	2816	cmd.exe	33
PID 2816 wrote to memory of 2860	2816	cmd.exe	33
PID 2860 wrote to memory of 2308	2860	DllCommonsvc.exe	41
PID 2860 wrote to memory of 2308	2860	DllCommonsvc.exe	41
PID 2860 wrote to memory of 2308	2860	DllCommonsvc.exe	41
PID 2860 wrote to memory of 2524	2860	DllCommonsvc.exe	42
PID 2860 wrote to memory of 2524	2860	DllCommonsvc.exe	42
PID 2860 wrote to memory of 2524	2860	DllCommonsvc.exe	42
PID 2860 wrote to memory of 1172	2860	DllCommonsvc.exe	43
PID 2860 wrote to memory of 1172	2860	DllCommonsvc.exe	43
PID 2860 wrote to memory of 1172	2860	DllCommonsvc.exe	43
PID 2860 wrote to memory of 2784	2860	DllCommonsvc.exe	47
PID 2860 wrote to memory of 2784	2860	DllCommonsvc.exe	47
PID 2860 wrote to memory of 2784	2860	DllCommonsvc.exe	47
PID 2784 wrote to memory of 1660	2784	cmd.exe	49
PID 2784 wrote to memory of 1660	2784	cmd.exe	49
PID 2784 wrote to memory of 1660	2784	cmd.exe	49
PID 2784 wrote to memory of 1976	2784	cmd.exe	50
PID 2784 wrote to memory of 1976	2784	cmd.exe	50
PID 2784 wrote to memory of 1976	2784	cmd.exe	50

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_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_c6568c127019ac3aaa77ffa07d900d778bc5501ebad9e06647f71bf7f35d58f9.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2344
- 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:1708
- - 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:2816
  - - 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:2860
    - - 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:2308
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Program Files (x86)\Microsoft Visual Studio 8\WmiPrvSE.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2524
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" -Command Add-MpPreference -ExclusionPath 'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\conhost.exe'
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1172
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\tdnSJsnH3X.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2784
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:1660
      - C:\providercommon\DllCommonsvc.exe
        
        "C:\providercommon\DllCommonsvc.exe"
        6⤵
        Executes dropped EXE
        Suspicious use of AdjustPrivilegeToken
        
        PID:1976

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft Visual Studio 8\WmiPrvSE.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2596

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSE" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Visual Studio 8\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2684

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "WmiPrvSEW" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Microsoft Visual Studio 8\WmiPrvSE.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2280

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 13 /tr "'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\conhost.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:764

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhost" /sc ONLOGON /tr "'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2028

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\Windows\Installer\{AC76BA86-7AD7-1033-7B44-A90000000001}\conhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2228

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\Local\Temp\tdnSJsnH3X.bat

Filesize
199B

MD5
e67e2fdd9fcb32b043c088ff05b89e91

SHA1
3827a7bc48d4eab88316e656a9a20eb8e82bb13f

SHA256
8425c8d3f347a9f464197c2c98d48dea4b90188dc9a4259c335230aba17205f0

SHA512
a568071e0c6123877f8b6ef7dcaa2412169a1a14b1c9198836a7b9785ba3ff068f2917cf2bfbd7354704ac848dfdb20d9ae941e077c32bd05811a2e5815e98a7

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

Filesize
7KB

MD5
d1deff0716405d97baaead9a453f9f71

SHA1
784b92bb0bba66a7508a348aa18fa0554e605aa1

SHA256
f99e279b0f0ada358b827eabd29a67c298563808d0c91bdfaa35d89753fce7fc

SHA512
375139c9ade35aa4a3895acd18abc7532bd529cddb5b2bfe62b7aafa1bbff19d001ac92949c5600be1d70632c038cf942e4db39fd3a47e4170aafd636769de4e

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/1172-40-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/2524-41-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/2860-13-0x00000000010D0000-0x00000000011E0000-memory.dmp

Filesize
1.1MB

Download
memory/2860-14-0x00000000005C0000-0x00000000005D2000-memory.dmp

Filesize
72KB

Download
memory/2860-15-0x0000000000BD0000-0x0000000000BDC000-memory.dmp

Filesize
48KB

Download
memory/2860-16-0x0000000000690000-0x000000000069C000-memory.dmp

Filesize
48KB

Download
memory/2860-17-0x0000000000BE0000-0x0000000000BEC000-memory.dmp

Filesize
48KB

Download