dcrat | 5656064ae4d3c302be4f376131bce57fa83ba30e94c329f33adb91836d7f4bf8

Analysis

max time kernel
101s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:09

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General

Target

35459ca7521a8565cf4acaadd346537b.exe
Size

984KB
MD5

35459ca7521a8565cf4acaadd346537b
SHA1

c22ce5beb121ecbba910dec28dedc0781d379524
SHA256

9622708341e5ac35563f5f258ae7736ad0a9f3c5875cfbf6e4570778b2e2c8bb
SHA512

691dc64caeb7a892b54c970f5d750a47a525004b162994c7e71eefbd4821c5c65961b2bbf08c356799e005de7c258fede7058cc3cc7f939f5ce1cd4ba40becd1
SSDEEP

12288:LzZvuvewk/0pPPXA5q/TQ9+n95vV25gnwHexSDwbwvDxlpaS98IUNldnd65EgF1s:LzZvuGD2PvA5YxwmbZB6Uv

Score

10^/10

dcrat infostealer persistence 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 5 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	5988	3540	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	5132	3540	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3240	3540	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3496	3540	schtasks.exe	88
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4532	3540	schtasks.exe	88

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3342763580-2723508992-2885672917-1000\Control Panel\International\Geo\Nation	35459ca7521a8565cf4acaadd346537b.exe

Executes dropped EXE 1 IoCs

pid	Process
1180	SearchApp.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dllhost = "\"C:\\Windows\\ShellComponents\\dllhost.exe\""	35459ca7521a8565cf4acaadd346537b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SppExtComObj = "\"C:\\Windows\\System32\\WcnNetsh\\SppExtComObj.exe\""	35459ca7521a8565cf4acaadd346537b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\spoolsv = "\"C:\\Windows\\System32\\lusrmgr\\spoolsv.exe\""	35459ca7521a8565cf4acaadd346537b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SearchApp = "\"C:\\Program Files\\edge_BITS_4640_720052988\\SearchApp.exe\""	35459ca7521a8565cf4acaadd346537b.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\lsass = "\"C:\\Windows\\System32\\Faultrep\\lsass.exe\""	35459ca7521a8565cf4acaadd346537b.exe

Drops file in System32 directory 12 IoCs

description	ioc	Process
File created	C:\Windows\System32\WcnNetsh\e1ef82546f0b02	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Windows\System32\lusrmgr\f3b6ecef712a24	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Windows\System32\Faultrep\6203df4a6bafc7	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\System32\WcnNetsh\RCX9220.tmp	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\System32\WcnNetsh\SppExtComObj.exe	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\System32\lusrmgr\spoolsv.exe	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Windows\System32\WcnNetsh\SppExtComObj.exe	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Windows\System32\lusrmgr\spoolsv.exe	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Windows\System32\Faultrep\lsass.exe	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\System32\lusrmgr\RCX9492.tmp	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\System32\Faultrep\RCX9909.tmp	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\System32\Faultrep\lsass.exe	35459ca7521a8565cf4acaadd346537b.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\edge_BITS_4640_720052988\SearchApp.exe	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Program Files\edge_BITS_4640_720052988\SearchApp.exe	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Program Files\edge_BITS_4640_720052988\38384e6a620884	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Program Files\edge_BITS_4640_720052988\RCX9704.tmp	35459ca7521a8565cf4acaadd346537b.exe

Drops file in Windows directory 4 IoCs

description	ioc	Process
File created	C:\Windows\ShellComponents\dllhost.exe	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\ShellComponents\dllhost.exe	35459ca7521a8565cf4acaadd346537b.exe
File created	C:\Windows\ShellComponents\5940a34987c991	35459ca7521a8565cf4acaadd346537b.exe
File opened for modification	C:\Windows\ShellComponents\RCX8F9E.tmp	35459ca7521a8565cf4acaadd346537b.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	35459ca7521a8565cf4acaadd346537b.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
3496	schtasks.exe
4532	schtasks.exe
5988	schtasks.exe
5132	schtasks.exe
3240	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4320	35459ca7521a8565cf4acaadd346537b.exe
4320	35459ca7521a8565cf4acaadd346537b.exe
4320	35459ca7521a8565cf4acaadd346537b.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4320	35459ca7521a8565cf4acaadd346537b.exe
Token: SeDebugPrivilege	1180	SearchApp.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 1180	4320	35459ca7521a8565cf4acaadd346537b.exe	94
PID 4320 wrote to memory of 1180	4320	35459ca7521a8565cf4acaadd346537b.exe	94

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\35459ca7521a8565cf4acaadd346537b.exe
"C:\Users\Admin\AppData\Local\Temp\35459ca7521a8565cf4acaadd346537b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Program Files\edge_BITS_4640_720052988\SearchApp.exe
  "C:\Program Files\edge_BITS_4640_720052988\SearchApp.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1180

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\ShellComponents\dllhost.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5988

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\WcnNetsh\SppExtComObj.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:5132

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\lusrmgr\spoolsv.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3240

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "SearchApp" /sc ONLOGON /tr "'C:\Program Files\edge_BITS_4640_720052988\SearchApp.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:3496

C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\System32\Faultrep\lsass.exe'" /rl HIGHEST /f
1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
PID:4532

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files\edge_BITS_4640_720052988\RCX9704.tmp

Filesize
984KB

MD5
905ac4eeeb2b7a2d763f8928fabd4f27

SHA1
9636415c120d5148de17c297990c2615478c45c2

SHA256
3b451406529d82d4748e010f9036f82b7b195faaf9fff40b565f1184520227b3

SHA512
5d8700935f6f5b28af7bb28c3108e099fdba38fb606753a29c6dc2075b5e8a164cd5263d1342feff4a6e385c9c234d337138a4bc54ea91731a1c626fdd54451b

Download Submit
C:\Windows\System32\Faultrep\lsass.exe

Filesize
984KB

MD5
35459ca7521a8565cf4acaadd346537b

SHA1
c22ce5beb121ecbba910dec28dedc0781d379524

SHA256
9622708341e5ac35563f5f258ae7736ad0a9f3c5875cfbf6e4570778b2e2c8bb

SHA512
691dc64caeb7a892b54c970f5d750a47a525004b162994c7e71eefbd4821c5c65961b2bbf08c356799e005de7c258fede7058cc3cc7f939f5ce1cd4ba40becd1

Download Submit
C:\Windows\System32\lusrmgr\spoolsv.exe

Filesize
984KB

MD5
5e32dec729e60705c28224e935159224

SHA1
cbbd2faca342c14053b72e0439f983b511e30c6d

SHA256
b924a0300e5232a0f423d7f9191c875828bd09c8d791ae0909cf26ee1441bd97

SHA512
73bdead582bd78cbba4a8ed3659c60f3feb316b62dca63e928e0681d3be73194ff55f4656453f4a5fee9f0856a860ff3c884832a47e66f0cd9cb01cab318fcf8

Download Submit
memory/4320-6-0x00000000028A0000-0x00000000028B0000-memory.dmp

Filesize
64KB

Download
memory/4320-10-0x000000001B2C0000-0x000000001B2D2000-memory.dmp

Filesize
72KB

Download
memory/4320-5-0x0000000002890000-0x00000000028A0000-memory.dmp

Filesize
64KB

Download
memory/4320-7-0x000000001B290000-0x000000001B298000-memory.dmp

Filesize
32KB

Download
memory/4320-8-0x000000001B2A0000-0x000000001B2B0000-memory.dmp

Filesize
64KB

Download
memory/4320-0-0x00007FFA30643000-0x00007FFA30645000-memory.dmp

Filesize
8KB

Download
memory/4320-9-0x000000001B2B0000-0x000000001B2BC000-memory.dmp

Filesize
48KB

Download
memory/4320-4-0x000000001B860000-0x000000001B8B0000-memory.dmp

Filesize
320KB

Download
memory/4320-11-0x000000001C0B0000-0x000000001C5D8000-memory.dmp

Filesize
5.2MB

Download
memory/4320-12-0x000000001B2F0000-0x000000001B2FC000-memory.dmp

Filesize
48KB

Download
memory/4320-3-0x0000000002870000-0x000000000288C000-memory.dmp

Filesize
112KB

Download
memory/4320-2-0x00007FFA30640000-0x00007FFA31101000-memory.dmp

Filesize
10.8MB

Download
memory/4320-1-0x0000000000570000-0x000000000066C000-memory.dmp

Filesize
1008KB

Download
memory/4320-116-0x00007FFA30640000-0x00007FFA31101000-memory.dmp

Filesize
10.8MB

Download