1f934e5ee7286e177226e282041c445cd88060032edb4f2ff0cd9a10c26b0722

Analysis

max time kernel
139s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
16/11/2023, 22:21

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General

Target

Logon_overwriter.exe
Size

266KB
MD5

08d52877fd68e4de576b54515330a900
SHA1

2404b3245e591b3e55badd8addf78f18ae8ff3b7
SHA256

1f934e5ee7286e177226e282041c445cd88060032edb4f2ff0cd9a10c26b0722
SHA512

3164c40f644a6bd4c955a66e83ac0dc84780963c97aa7001dc734b8e2e0579bb768de0820465ca6fed6b89ce19897b44dc30d072663ac9bdda59d35ea14b2cf1
SSDEEP

6144:pbpdyCIzMEZ4DQ0SsG4+7WO7WfdyCIzMEZ4DQ0SsG4Nq:glzMKwKaOaIlzMKwQ

Score

8^/10

discovery exploit

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
5032	takeown.exe
720	icacls.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-1-5-21-3125601242-331447593-1512828465-1000\Control Panel\International\Geo\Nation	Logon_overwriter.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
5032	takeown.exe
720	icacls.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\LogonUI.exe	Logon_overwriter.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeTakeOwnershipPrivilege	5032	takeown.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3908 wrote to memory of 3548	3908	Logon_overwriter.exe	91
PID 3908 wrote to memory of 3548	3908	Logon_overwriter.exe	91
PID 3548 wrote to memory of 5032	3548	cmd.exe	93
PID 3548 wrote to memory of 5032	3548	cmd.exe	93
PID 3548 wrote to memory of 720	3548	cmd.exe	94
PID 3548 wrote to memory of 720	3548	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\Logon_overwriter.exe
"C:\Users\Admin\AppData\Local\Temp\Logon_overwriter.exe"
1⤵
- Checks computer location settings
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3908
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32 && icacls C:\Windows\System32 /grant "%username%:F"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3548
- - C:\Windows\system32\takeown.exe
    takeown /f C:\Windows\System32
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - Suspicious use of AdjustPrivilegeToken
    PID:5032
- - C:\Windows\system32\icacls.exe
    icacls C:\Windows\System32 /grant "Admin:F"
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:720

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

Replay Monitor

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Downloads

memory/3908-0-0x000001C6BFAA0000-0x000001C6BFAE8000-memory.dmp

Filesize
288KB

Download
memory/3908-1-0x00007FF94F3F0000-0x00007FF94FEB1000-memory.dmp

Filesize
10.8MB

Download
memory/3908-2-0x000001C6D9F80000-0x000001C6D9F90000-memory.dmp

Filesize
64KB

Download
memory/3908-3-0x00007FF94F3F0000-0x00007FF94FEB1000-memory.dmp

Filesize
10.8MB

Download
memory/3908-4-0x000001C6D9F80000-0x000001C6D9F90000-memory.dmp

Filesize
64KB

Download
memory/3908-7-0x00007FF94F3F0000-0x00007FF94FEB1000-memory.dmp

Filesize
10.8MB

Download