6b8785d7d3dc581d1cfa19fbcd2b9fd11a914be94a85692f5c78b3984a1ce027

Analysis

max time kernel
420s
max time network
426s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
05/07/2024, 20:11

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General

Target

Uninstall ScreenStyler.exe
Size

316KB
MD5

887029f6c3ec819b4c7ff1d39763755c
SHA1

29d3aa369e2c5727155310e39a1fda0eaa4fd94b
SHA256

dd28eed7eac7e6a2341a3f2a519baeeb5a9772ad9d2d4dcc054fea0f091e5fbf
SHA512

75af015053232956f332af90c8cfee694e154f441f36aad9be36ae7b6b9310a913aec7f41214e59ac5d5fb83ef3a7a93fef52098b3649b2661a5c78124d8aac7
SSDEEP

6144:8740IzS/Iw1/FFbMGIgn4MXNE3bj3cOS976UJbGUaJtPHI2t0EyL+3iaY:+h/z/9Hb4MdibI1976tJYRK3ZY

Score

7^/10

Malware Config

Signatures

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-1-5-21-2753856825-3907105642-1818461144-1000\Control Panel\International\Geo\Nation	Un_A.exe

Executes dropped EXE 1 IoCs

pid	Process
2912	Un_A.exe

Loads dropped DLL 14 IoCs

pid	Process
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe

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

System Information Discovery
T1082

Kills process with taskkill 3 IoCs

evasion

pid	Process
3668	taskkill.exe
2664	taskkill.exe
4572	taskkill.exe

Modifies registry class 2 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.styler\	Un_A.exe
Key created	\REGISTRY\MACHINE\Software\Classes\.styler	Un_A.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe
2912	Un_A.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	taskkill.exe
Token: SeDebugPrivilege	2664	taskkill.exe
Token: SeDebugPrivilege	4572	taskkill.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3612 wrote to memory of 2912	3612	Uninstall ScreenStyler.exe	83
PID 3612 wrote to memory of 2912	3612	Uninstall ScreenStyler.exe	83
PID 3612 wrote to memory of 2912	3612	Uninstall ScreenStyler.exe	83
PID 2912 wrote to memory of 3668	2912	Un_A.exe	84
PID 2912 wrote to memory of 3668	2912	Un_A.exe	84
PID 2912 wrote to memory of 3668	2912	Un_A.exe	84
PID 2912 wrote to memory of 2664	2912	Un_A.exe	87
PID 2912 wrote to memory of 2664	2912	Un_A.exe	87
PID 2912 wrote to memory of 2664	2912	Un_A.exe	87
PID 2912 wrote to memory of 4572	2912	Un_A.exe	89
PID 2912 wrote to memory of 4572	2912	Un_A.exe	89
PID 2912 wrote to memory of 4572	2912	Un_A.exe	89

C:\Users\Admin\AppData\Local\Temp\Uninstall ScreenStyler.exe
"C:\Users\Admin\AppData\Local\Temp\Uninstall ScreenStyler.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe
  "C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe" _?=C:\Users\Admin\AppData\Local\Temp\
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im ScreenStyler.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3668
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im Rainmeter.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:2664
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /f /im RocketDock.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4572

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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:\Users\Admin\AppData\Local\Temp\nszC341.tmp\StdUtils.dll

Filesize
100KB

MD5
c6a6e03f77c313b267498515488c5740

SHA1
3d49fc2784b9450962ed6b82b46e9c3c957d7c15

SHA256
b72e9013a6204e9f01076dc38dabbf30870d44dfc66962adbf73619d4331601e

SHA512
9870c5879f7b72836805088079ad5bbafcb59fc3d9127f2160d4ec3d6e88d3cc8ebe5a9f5d20a4720fe6407c1336ef10f33b2b9621bc587e930d4cbacf337803

Download Submit
C:\Users\Admin\AppData\Local\Temp\nszC341.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
C:\Users\Admin\AppData\Local\Temp\nszC341.tmp\UAC.dll

Filesize
14KB

MD5
adb29e6b186daa765dc750128649b63d

SHA1
160cbdc4cb0ac2c142d361df138c537aa7e708c9

SHA256
2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08

SHA512
b28adcccf0c33660fecd6f95f28f11f793dc9988582187617b4c113fb4e6fdad4cf7694cd8c0300a477e63536456894d119741a940dda09b7df3ff0087a7eada

Download Submit
C:\Users\Admin\AppData\Local\Temp\nszC341.tmp\WinShell.dll

Filesize
3KB

MD5
1cc7c37b7e0c8cd8bf04b6cc283e1e56

SHA1
0b9519763be6625bd5abce175dcc59c96d100d4c

SHA256
9be85b986ea66a6997dde658abe82b3147ed2a1a3dcb784bb5176f41d22815a6

SHA512
7acf7f8e68aa6066b59ca9f2ae2e67997e6b347bc08eb788d2a119b3295c844b5b9606757168e8d2fbd61c2cda367bf80e9e48c9a52c28d5a7a00464bfd2048f

Download Submit
C:\Users\Admin\AppData\Local\Temp\nszC341.tmp\nsExec.dll

Filesize
6KB

MD5
ec0504e6b8a11d5aad43b296beeb84b2

SHA1
91b5ce085130c8c7194d66b2439ec9e1c206497c

SHA256
5d9ceb1ce5f35aea5f9e5a0c0edeeec04dfefe0c77890c80c70e98209b58b962

SHA512
3f918f1b47e8a919cbe51eb17dc30acc8cfc18e743a1bae5b787d0db7d26038dc1210be98bf5ba3be8d6ed896dbbd7ac3d13e66454a98b2a38c7e69dad30bb57

Download Submit
C:\Users\Admin\AppData\Local\Temp\nszC341.tmp\nsProcess.dll

Filesize
4KB

MD5
f0438a894f3a7e01a4aae8d1b5dd0289

SHA1
b058e3fcfb7b550041da16bf10d8837024c38bf6

SHA256
30c6c3dd3cc7fcea6e6081ce821adc7b2888542dae30bf00e881c0a105eb4d11

SHA512
f91fcea19cbddf8086affcb63fe599dc2b36351fc81ac144f58a80a524043ddeaa3943f36c86ebae45dd82e8faf622ea7b7c9b776e74c54b93df2963cfe66cc7

Download Submit
C:\Users\Admin\AppData\Local\Temp\~nsuA.tmp\Un_A.exe

Filesize
316KB

MD5
887029f6c3ec819b4c7ff1d39763755c

SHA1
29d3aa369e2c5727155310e39a1fda0eaa4fd94b

SHA256
dd28eed7eac7e6a2341a3f2a519baeeb5a9772ad9d2d4dcc054fea0f091e5fbf

SHA512
75af015053232956f332af90c8cfee694e154f441f36aad9be36ae7b6b9310a913aec7f41214e59ac5d5fb83ef3a7a93fef52098b3649b2661a5c78124d8aac7

Download Submit