a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69

Analysis

max time kernel
141s
max time network
124s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
27/04/2024, 20:17

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General

Target

a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe
Size

198KB
MD5

bb90e2e55198bb82b96b6aa129626a7d
SHA1

f2225dc69cc8f05c938beede8cb3256619f17f1f
SHA256

a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69
SHA512

63fe2e2c0d392bb8bd666c559dc0efd7f35eb39ddd110ad19221876612cac57a7379af03714df295093ccbdcbf49a1a23689651809e8373bd2aba1c1030e6f77
SSDEEP

6144:rBs27MMLyX5HXXXDTXXXOGqIII+pXXX5AYjKXXXDoXXXG6XXXxXXXLIIIEAkOCOE:rK20HXXX/XXXFqIIIcXXX5j2XXXcXXXl

Score

7^/10

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
2136	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1708	zskhost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Debug\zskhost.exe	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe
File opened for modification	C:\Windows\Debug\zskhost.exe	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	zskhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	zskhost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2972	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 2136	2972	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe	29
PID 2972 wrote to memory of 2136	2972	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe	29
PID 2972 wrote to memory of 2136	2972	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe	29
PID 2972 wrote to memory of 2136	2972	a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe	29

C:\Users\Admin\AppData\Local\Temp\a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe
"C:\Users\Admin\AppData\Local\Temp\a3bd5e5538c1d97608d726deec76249cbec22962b6c86f6b727c7b5222ed0c69.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\A3BD5E~1.EXE > nul
  2⤵
  - Deletes itself
  PID:2136

C:\Windows\Debug\zskhost.exe
C:\Windows\Debug\zskhost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:1708

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:\Windows\debug\zskhost.exe

Filesize
198KB

MD5
13a92321183f2dbbfa09abc08f3abdf0

SHA1
190f4115d4469868498e631aa531824fb5002770

SHA256
430bb164999db9ede3474ccf54c0332ffe6b9e22c3d58ca6941d4bb6e5967882

SHA512
0076c3f3fc78e7af4e4b309e81cd764cc4af59b6271bc309ba0896c4e4d515f28a04accc0806a2a0138b0f4f341c89f138bda7842668f2cf167128c1d31dffe4

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