f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9

Analysis

max time kernel
141s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
11/03/2024, 01:57

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General

Target

f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe
Size

161KB
MD5

f44f1d6941436fe095bef7425f850335
SHA1

e442ae7623976fbc3b8bcd1118cdf9bd3ec2d6a3
SHA256

f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9
SHA512

afd084d03ea732dda2a331e4ffd5cbdbed6181649c520cd2a9b9522033eeaf4722b680ac920a666281f8ce6cd20c33aa6f36646e944b8b050973be544a3b850a
SSDEEP

3072:qv5Ls27BIJo7LyXuM/XXXdwVBXXXhYfjCXXXDrXXXDKXXXmfXXXxXXXLIIIBoqfm:qBs27V7LyXf/XXX2VBXXXefjCXXXDrXf

Score

9^/10

Malware Config

Signatures

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral1/files/0x000b000000012256-2.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Deletes itself 1 IoCs

pid	Process
1028	cmd.exe

Executes dropped EXE 1 IoCs

pid	Process
1668	zskhost.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Debug\zskhost.exe	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe
File opened for modification	C:\Windows\Debug\zskhost.exe	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.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	1032	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 1028	1032	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe	29
PID 1032 wrote to memory of 1028	1032	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe	29
PID 1032 wrote to memory of 1028	1032	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe	29
PID 1032 wrote to memory of 1028	1032	f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe	29

C:\Users\Admin\AppData\Local\Temp\f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe
"C:\Users\Admin\AppData\Local\Temp\f4570a3e1ae9fb5307f321983c446d9bbef183de59726bd11be5440e6faf25f9.exe"
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1032
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\F4570A~1.EXE > nul
  2⤵
  - Deletes itself
  PID:1028

C:\Windows\Debug\zskhost.exe
C:\Windows\Debug\zskhost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:1668

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
161KB

MD5
91d5eb21d6aa598cc67dcd6e5147639e

SHA1
e43735e8fdaf043319d6b72a42f1588fd5750f2f

SHA256
9d5634be23ab5fdafd8160e804e829d3105d2863c483907fcba7b79477eb7573

SHA512
5d8fe33f304445bd8b38d87bf50a76452f88e24a3d953e296ea9e0ac0afcd08b6c6dee54dac7a22044796be6a2479e52568dce5fcbe785632bbe84b64cd82b71

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