d1772bb2f21aa227ee5f90c68dbf268ed09c45d079f6770c319fbd396c9bc587

Analysis

max time kernel
185s
max time network
184s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
23-11-2022 18:39

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General

Target

2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe
Size

145KB
MD5

b5641ebb200bc913a7c171c956272d38
SHA1

330c8a98fa512017d92129c699e055196407af89
SHA256

d1772bb2f21aa227ee5f90c68dbf268ed09c45d079f6770c319fbd396c9bc587
SHA512

ec5eea4ebcf54f181a310790af5e3ca5f888f63b48b81442bc3bf63512977cc7caa7384b3074b68dd87f1345261e58189e64b537080dc182d9696781be295667
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp699GL4Z:z6a+CdOOtEvwDpjczL

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4148 asih.exe

pid	process
4148	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/732-139-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4148-151-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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

Processes:

2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe

description	pid	process	target process
PID 732 wrote to memory of 4148	732	2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe	asih.exe
PID 732 wrote to memory of 4148	732	2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe	asih.exe
PID 732 wrote to memory of 4148	732	2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2022-11-23_b5641ebb200bc913a7c171c956272d38_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:732
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4148

Network

MITRE ATT&CK Enterprise v6

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\asih.exe

Filesize
145KB

MD5
78acfd947340cd08f00f85bd626f378f

SHA1
9a6eae39ae0e01a39c2a34d28da053fb58143ce0

SHA256
447b8674d32a496cba8ab296db1fae85cfa54be691bb388351b84de65a895eaf

SHA512
3c21bd76ab8a5f915551d0d387fd6501a3b14482b25e97e24e695ff72a7577015175e2042fa3e0117673d09d6a264da250f6d7c2c80094344a37562bc472dd2a

Download Submit
C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
145KB

MD5
78acfd947340cd08f00f85bd626f378f

SHA1
9a6eae39ae0e01a39c2a34d28da053fb58143ce0

SHA256
447b8674d32a496cba8ab296db1fae85cfa54be691bb388351b84de65a895eaf

SHA512
3c21bd76ab8a5f915551d0d387fd6501a3b14482b25e97e24e695ff72a7577015175e2042fa3e0117673d09d6a264da250f6d7c2c80094344a37562bc472dd2a

Download Submit
memory/732-132-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/732-133-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/732-139-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/732-140-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download
memory/4148-141-0x0000000000000000-mapping.dmp

Download
memory/4148-145-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4148-151-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4148-152-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download