5015af8fb5725c4c9ebac28a890128587b888acddab6cc9ff06e94e782713882

Analysis

max time kernel
291s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22-11-2024 03:39

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General

Target

unpack.exe
Size

109KB
MD5

46110bbaaf43da136e386756e78061d3
SHA1

7b6bf2717063d24f0cad0da2e11de9cfe9e84301
SHA256

f58ddb230caa3541543bc2e9ffb68e37257bcda578ae71a0dd5be2c7db71c8e4
SHA512

52d5767827ec3377280ee8c5247f2bdd7a6a7c619be53a549149be07b1327c5d7b0bb609ba8dab11e7d74b371e0b4e8aa2dceced8c10b111e983937a5bb8c137
SSDEEP

3072:kGwOWQP1ofFYoNA5HbScuQq0tf5KmK5Y8nPRBTssu7r6dmHX/Yu9:2Qdol2bScuQq0tfIvPc/g

Score

10^/10

defense_evasion discovery persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

unpack.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "C:\\Users\\Admin\\AppData\\Local\\Temp\\unpack.exe"	unpack.exe

Impair Defenses: Safe Mode Boot 1 TTPs 3 IoCs

defense_evasion

Safe Mode Boot

T1562.009

Processes:

unpack.exe

description	ioc	process
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\WinDefend	unpack.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\ProfSvc	unpack.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\SafeBoot\Minimal\Power	unpack.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

unpack.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\system = "C:\\Users\\Admin\\AppData\\Local\\Temp\\unpack.exe"	unpack.exe

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

unpack.exetaskkill.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	unpack.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	taskkill.exe

Kills process with taskkill 1 IoCs
evasion

Processes:

taskkill.exe

pid process

2396 taskkill.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 2396 taskkill.exe

pid	process
2396	taskkill.exe

description	pid	process
Token: SeDebugPrivilege	2396	taskkill.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

unpack.exe

description	pid	process	target process
PID 2384 wrote to memory of 2396	2384	unpack.exe	taskkill.exe
PID 2384 wrote to memory of 2396	2384	unpack.exe	taskkill.exe
PID 2384 wrote to memory of 2396	2384	unpack.exe	taskkill.exe
PID 2384 wrote to memory of 2396	2384	unpack.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\unpack.exe
"C:\Users\Admin\AppData\Local\Temp\unpack.exe"
1⤵
- Modifies WinLogon for persistence
- Impair Defenses: Safe Mode Boot
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2384
- C:\Windows\SysWOW64\taskkill.exe
  taskkill /F /IM explorer.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:2396