castlerat | e7d7d8050ac4d2dfea9b02b789be1f73ea58557ade17823f6391ab419e0ca4d3

Analysis

max time kernel
149s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20251016-en
resource tags

arch:x64arch:x86image:win10v2004-20251016-enlocale:en-usos:windows10-2004-x64system
submitted
17/10/2025, 14:49

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General

Target
e7d7d8050ac4d2dfea9b02b789be1f73ea58557ade17823f6391ab419e0ca4d3.dll
Size 1.8MB
Sample251017-r63edact4c
SHA256 e7d7d8050ac4d2dfea9b02b789be1f73ea58557ade17823f6391ab419e0ca4d3
MD5 d2b4c3f32a4f6382b504393638af5837
SHA1 4adaa7c9c90fb31bae024e8d1f1bec2230984c70
SHA512 22b3598ba776811058bf1bbcf5d3b03c468c50dbd4a805598d363174c2bb879ca8579780b4bf2871fa6ecc4c9a9372b8dea3f76b264cb2f01262b11e1a4c56ae
SSDEEP 49152:nbA944yp5afXm40HQW0LF8XyGLtJWJTfZWYY:8bZm
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

tag_150 apt defense_evasion castlerat trojan

Malware Config

Signatures

CastleRAT
CastleRAT is a trojan available in both Python and C variants.
trojan castlerat
Castlerat family
castlerat

Detects C variant of CastleRAT. 2 IoCs

trojan apt tag_150

resource	yara_rule
behavioral1/memory/3364-1-0x000001E66B490000-0x000001E66BBCF000-memory.dmp	family_castlerat_c
behavioral1/memory/3364-17-0x000001E66B490000-0x000001E66BBCF000-memory.dmp	family_castlerat_c

Badlisted process makes network request 1 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
6	3364	rundll32.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\rundll32.exe	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
444	powershell.exe
444	powershell.exe
2900	powershell.exe
2900	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	444	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3364 wrote to memory of 444	3364	rundll32.exe	81
PID 3364 wrote to memory of 444	3364	rundll32.exe	81
PID 3364 wrote to memory of 2900	3364	rundll32.exe	85
PID 3364 wrote to memory of 2900	3364	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e7d7d8050ac4d2dfea9b02b789be1f73ea58557ade17823f6391ab419e0ca4d3.dll,#1
1⤵
- Badlisted process makes network request
- Suspicious use of WriteProcessMemory
PID:3364
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:444
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell Start-Sleep -Seconds 3; Remove-Item -Path C:\Windows\system32\rundll32.exe -Force
  2⤵
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2900

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_qqszigup.orv.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qqszigup.orv.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/444-3-0x00000246F0690000-0x00000246F06A0000-memory.dmp

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memory/444-4-0x00000246F0690000-0x00000246F06A0000-memory.dmp

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memory/444-5-0x00000246F3390000-0x00000246F33B2000-memory.dmp

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memory/444-13-0x00000246F38C0000-0x00000246F3904000-memory.dmp

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memory/444-14-0x00000246F3990000-0x00000246F3A06000-memory.dmp

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memory/444-15-0x00000246F0690000-0x00000246F06A0000-memory.dmp

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memory/3364-1-0x000001E66B490000-0x000001E66BBCF000-memory.dmp

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memory/3364-17-0x000001E66B490000-0x000001E66BBCF000-memory.dmp

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