dcrat | 95a53f6f1269cbfa5dd44e1d53d1206f33ba9fbdf18fc34ce68facbb84529a99

Analysis

max time kernel
42s
max time network
48s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
08-02-2025 10:41

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General

Target

c961f509d3a8ff2347a68f424eab0d2e.exe
Size

1.5MB
MD5

c961f509d3a8ff2347a68f424eab0d2e
SHA1

da8ea51829b79720247c4c74b7838a7c108c847f
SHA256

95a53f6f1269cbfa5dd44e1d53d1206f33ba9fbdf18fc34ce68facbb84529a99
SHA512

96cb67b386035aa7e44a5b398aa4773e9991c85ebd042872e2a02faa1c88c0125f5355423aa51f81d124232390ae1f107a8dd96c7745211ee299872882dba580
SSDEEP

24576:u2G/nvxW3WieCYfUmSxpTSwXc/PkRBZEW6kaRe/qtWE0FI+WAEv8jy:ubA3jvmSx1Xc/swY/qt0FsA2r

Score

10^/10

dcrat defense_evasion discovery 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 15 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	2964	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2900	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3040	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3064	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2416	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2212	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2396	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1868	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	1792	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2132	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2208	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2480	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2128	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2104	2816	schtasks.exe	37
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	2060	2816	schtasks.exe	37

DCRat payload 3 IoCs

Detects payload of DCRat, commonly dropped by NSIS installers.

rat

resource	yara_rule
behavioral1/files/0x00060000000186c3-30.dat	dcrat
behavioral1/memory/1576-34-0x0000000000E60000-0x0000000000F98000-memory.dmp	dcrat
behavioral1/memory/808-56-0x0000000000860000-0x0000000000998000-memory.dmp	dcrat

Disables Task Manager via registry modification
defense_evasion

Executes dropped EXE 2 IoCs

pid	Process
1576	Blockdll.exe
808	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
328	cmd.exe
328	cmd.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Google\Temp\winlogon.exe	Blockdll.exe
File opened for modification	C:\Program Files (x86)\Google\Temp\winlogon.exe	Blockdll.exe
File created	C:\Program Files (x86)\Google\Temp\cc11b995f2a76d	Blockdll.exe
File created	C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\cmd.exe	Blockdll.exe
File created	C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\ebf1f9fa8afd6d	Blockdll.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 7 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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c961f509d3a8ff2347a68f424eab0d2e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
1944	reg.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 15 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
1868	schtasks.exe
2128	schtasks.exe
2060	schtasks.exe
2396	schtasks.exe
2132	schtasks.exe
2480	schtasks.exe
1792	schtasks.exe
2208	schtasks.exe
2104	schtasks.exe
3040	schtasks.exe
3064	schtasks.exe
2416	schtasks.exe
2212	schtasks.exe
2964	schtasks.exe
2900	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1576	Blockdll.exe
808	cmd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1576	Blockdll.exe
Token: SeDebugPrivilege	808	cmd.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 2996	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	29
PID 2808 wrote to memory of 2996	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	29
PID 2808 wrote to memory of 2996	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	29
PID 2808 wrote to memory of 2996	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	29
PID 2808 wrote to memory of 2872	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	30
PID 2808 wrote to memory of 2872	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	30
PID 2808 wrote to memory of 2872	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	30
PID 2808 wrote to memory of 2872	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	30
PID 2808 wrote to memory of 3024	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	31
PID 2808 wrote to memory of 3024	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	31
PID 2808 wrote to memory of 3024	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	31
PID 2808 wrote to memory of 3024	2808	c961f509d3a8ff2347a68f424eab0d2e.exe	31
PID 3024 wrote to memory of 1184	3024	cmd.exe	33
PID 3024 wrote to memory of 1184	3024	cmd.exe	33
PID 3024 wrote to memory of 1184	3024	cmd.exe	33
PID 3024 wrote to memory of 1184	3024	cmd.exe	33
PID 2996 wrote to memory of 328	2996	WScript.exe	34
PID 2996 wrote to memory of 328	2996	WScript.exe	34
PID 2996 wrote to memory of 328	2996	WScript.exe	34
PID 2996 wrote to memory of 328	2996	WScript.exe	34
PID 328 wrote to memory of 1576	328	cmd.exe	36
PID 328 wrote to memory of 1576	328	cmd.exe	36
PID 328 wrote to memory of 1576	328	cmd.exe	36
PID 328 wrote to memory of 1576	328	cmd.exe	36
PID 1576 wrote to memory of 2408	1576	Blockdll.exe	53
PID 1576 wrote to memory of 2408	1576	Blockdll.exe	53
PID 1576 wrote to memory of 2408	1576	Blockdll.exe	53
PID 328 wrote to memory of 1944	328	cmd.exe	55
PID 328 wrote to memory of 1944	328	cmd.exe	55
PID 328 wrote to memory of 1944	328	cmd.exe	55
PID 328 wrote to memory of 1944	328	cmd.exe	55
PID 2408 wrote to memory of 268	2408	cmd.exe	56
PID 2408 wrote to memory of 268	2408	cmd.exe	56
PID 2408 wrote to memory of 268	2408	cmd.exe	56
PID 2408 wrote to memory of 808	2408	cmd.exe	57
PID 2408 wrote to memory of 808	2408	cmd.exe	57
PID 2408 wrote to memory of 808	2408	cmd.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\c961f509d3a8ff2347a68f424eab0d2e.exe
"C:\Users\Admin\AppData\Local\Temp\c961f509d3a8ff2347a68f424eab0d2e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\mssurrogatecomponentNetsvc\YhdLF3rLjxMONLvjk0JHQw8.vbe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2996
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\mssurrogatecomponentNetsvc\hLSNfx20vx21Hji.bat" "
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:328
  - - C:\mssurrogatecomponentNetsvc\Blockdll.exe
      "C:\mssurrogatecomponentNetsvc\Blockdll.exe"
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:1576
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\79xDM9udut.bat"
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2408
      - C:\Windows\system32\w32tm.exe
        
        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
        6⤵
        
        PID:268
      - C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\cmd.exe
        
        "C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\cmd.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:808
  - - C:\Windows\SysWOW64\reg.exe
      reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f
      4⤵
      System Location Discovery: System Language Discovery
      Modifies registry key
      PID:1944
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\mssurrogatecomponentNetsvc\file.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2872
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\mssurrogatecomponentNetsvc\2yJVXS35xucAG0KML25.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3024
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe
    3⤵
    - System Location Discovery: System Language Discovery
    PID:1184

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 9 /tr "'C:\Program Files (x86)\Google\Temp\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2964

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\Temp\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2900

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Google\Temp\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3040

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 6 /tr "'C:\mssurrogatecomponentNetsvc\winlogon.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3064

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\mssurrogatecomponentNetsvc\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2416

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "winlogonw" /sc MINUTE /mo 12 /tr "'C:\mssurrogatecomponentNetsvc\winlogon.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2212

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\csrss.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2396

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Default User\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1868

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\csrss.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:1792

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\cmd.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2132

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2208

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Program Files (x86)\Microsoft Synchronization Services\ADO.NET\cmd.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2480

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\System.exe'" /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2128

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2104

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-00BA-0409-0000-0000000FF1CE}-C\System.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:2060

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Modify Registry

T1112

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\79xDM9udut.bat

Filesize
238B

MD5
835e4c68a7f78ca5ed6111d3b3dc24c9

SHA1
a6bf85b4f57184bb60b4b05becc161c4032ea292

SHA256
295296e2262945f43c48e49159d38df75665f5932d953c7fd240f2990da5f50e

SHA512
97f2915a0ae17f411aa7f0fab67e22e8623fd3f11970f40dc97d0b24376ea97be802d02b3c078c51b3208300abf3b242ed8ee48a0d2f6b5af03adfd9c426e4a8

Download Submit
C:\mssurrogatecomponentNetsvc\2yJVXS35xucAG0KML25.bat

Filesize
7B

MD5
45e0edaca8702e6e90d1d98cf3647d5f

SHA1
ebf1f9fa8afd6d1932bd65bc4cc3af89a4c8e228

SHA256
7371f071a9a4e653a5afd134bce9c735ef74b0421d6988958e5c6d8a34feaa3b

SHA512
5b92708f1d10777a3219892c9f5e5a2bb0af259004fb1f44aa3b0832859c31d07de3c8960f3f55bc56f206c2008f4d733380d3bb1d947e316123f5a5f8e92fa8

Download Submit
C:\mssurrogatecomponentNetsvc\YhdLF3rLjxMONLvjk0JHQw8.vbe

Filesize
219B

MD5
814ee459acfe8300331f2f7c220aa64c

SHA1
20eff321a038a819677cf8fac24609459a31faea

SHA256
3a4e5824972e8da4b28ab1eec6b2f8b8d5b6c52f811de2e7d455c29c699740d5

SHA512
12895b3648a5675283d0816ef25507185da0e1b000a018e7c56905145c219427b45ede4143aa47169a00c63e300b36ac796bf1321977050a6574c90a5e144606

Download Submit
C:\mssurrogatecomponentNetsvc\file.vbs

Filesize
34B

MD5
677cc4360477c72cb0ce00406a949c61

SHA1
b679e8c3427f6c5fc47c8ac46cd0e56c9424de05

SHA256
f1cccb5ae4aa51d293bd3c7d2a1a04cb7847d22c5db8e05ac64e9a6d7455aa0b

SHA512
7cfe2cc92f9e659f0a15a295624d611b3363bd01eb5bcf9bc7681ea9b70b0564d192d570d294657c8dc2c93497fa3b4526c975a9bf35d69617c31d9936573c6a

Download Submit
C:\mssurrogatecomponentNetsvc\hLSNfx20vx21Hji.bat

Filesize
156B

MD5
64b7b7762d49a97b22befce96babac24

SHA1
498c4597ca11ae7a32e77a2d3e9a79cb0db06c82

SHA256
a186a6b3b73f2aa20fdbca66775719e90cd09d8082270745e997dfb168226a13

SHA512
5cc08254d673d85c22e3014812df3f71df3d4dcd4ab6a3e9eea020a487208a268ae0510b8f2b65154a7d12b48afd661e2707a5fd5131fe1744be20e3e1e9b7e0

Download Submit
\mssurrogatecomponentNetsvc\Blockdll.exe

Filesize
1.2MB

MD5
419e95b4ded7e7855a0d9275c2ac3f37

SHA1
3de0d3f378af9b5613705f355888e44cd784e09b

SHA256
fbcf25540f0d526598b9b57d7d8b49120640f45222a1262691b7b2c27d35d07c

SHA512
9ea02d3dc560397dc632c855bd4243785449592a38493d2fb87b54d771f2aa991d25b7cdfe17d0f4471cfcbbcbb0391fb4c725e0834829521859089d3527b7c3

Download Submit
memory/808-56-0x0000000000860000-0x0000000000998000-memory.dmp

Filesize
1.2MB

Download
memory/1576-34-0x0000000000E60000-0x0000000000F98000-memory.dmp

Filesize
1.2MB

Download
memory/1576-35-0x0000000000440000-0x000000000045C000-memory.dmp

Filesize
112KB

Download
memory/1576-36-0x0000000000460000-0x0000000000476000-memory.dmp

Filesize
88KB

Download
memory/1576-37-0x0000000000570000-0x000000000057E000-memory.dmp

Filesize
56KB

Download
memory/1576-38-0x0000000000B20000-0x0000000000B28000-memory.dmp

Filesize
32KB

Download