f30ea0f7276100d02319bee64445888af5d784eb12a962ea88f99d2ae4137897

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
02/03/2024, 23:24

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General

Target
MicrosoftWindowsServicesEtc/WinScrew.exe
Size 52KB
Sample240302-3d17dsag33
SHA256 429e01b0e06b02a55bafb1527629f8d4c5f64d9b21ac9f81484a3928fdce6dc9
MD5 1aaafedd9f259acca75708f4af10b5be
SHA1 f6b4ea28d304e1f9205c1c0b970d60ee989402f2
SHA512 a995ebf4d142452aabb419f0cacfa5412d03532840cb08c37dd7c00001dee521bf9d0da66ac4346b07dffd91fe01fa3115fa05811acbd43d380320dca1be4aa8
SSDEEP 1536:Sn1KqRJ9x3jnIbslu8JFNDfIDIO40nToIfqFwr:Sn1KUhrIbsTIl4YTBfqa
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

discovery exploit

Malware Config

Signatures

Possible privilege escalation attempt 4 IoCs

exploit

pid	Process
1624	icacls.exe
4612	takeown.exe
1208	icacls.exe
5088	takeown.exe

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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation	WinScrew.exe

Modifies file permissions 1 TTPs 4 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4612	takeown.exe
1208	icacls.exe
5088	takeown.exe
1624	icacls.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\sethc.exe	cmd.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeTakeOwnershipPrivilege	4612	takeown.exe
Token: SeTakeOwnershipPrivilege	5088	takeown.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 64	4380	WinScrew.exe	90
PID 4380 wrote to memory of 64	4380	WinScrew.exe	90
PID 64 wrote to memory of 4612	64	cmd.exe	93
PID 64 wrote to memory of 4612	64	cmd.exe	93
PID 64 wrote to memory of 1208	64	cmd.exe	94
PID 64 wrote to memory of 1208	64	cmd.exe	94
PID 64 wrote to memory of 5088	64	cmd.exe	95
PID 64 wrote to memory of 5088	64	cmd.exe	95
PID 64 wrote to memory of 1624	64	cmd.exe	96
PID 64 wrote to memory of 1624	64	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\MicrosoftWindowsServicesEtc\WinScrew.exe
"C:\Users\Admin\AppData\Local\Temp\MicrosoftWindowsServicesEtc\WinScrew.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\1\3633.bat C:\Users\Admin\AppData\Local\Temp\MicrosoftWindowsServicesEtc\WinScrew.exe"
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:64
- - C:\Windows\System32\takeown.exe
    takeown /f logonui.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:4612
- - C:\Windows\System32\icacls.exe
    icacls logonui.exe /granted "Admin":F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1208
- - C:\Windows\System32\takeown.exe
    takeown /f sethc.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:5088
- - C:\Windows\System32\icacls.exe
    icacls sethc.exe /granted "Admin":F
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

File and Directory Permissions Modification

T1222

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

3633.bat

Path C:\Users\Admin\AppData\Local\Temp\1\3633.bat
Size 347B
SHA256 e8e180570ec4e0aa25663250ace1d1eb45404ef6c25f5680f90391d6e30b7b0e
MD5 2d6137c014799e13eb4ed488b2fb6f24
SHA1 ba8b8734a2fec8bd5d83fb9f82839be299842f83
SHA512 53afcd651e0daca461c20164536a541e0e48be2286bc4952494dc9eec1a23994f11430ce6f3c1dc28b90ba3b8a1d28446bd0d357bbc620243aa9cd6b35506c3c
MD5 SHA1 SHA512

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