9eb1aab4f92d5593b1f7acb731eafa98e71e939f7c2bee696d0de3e122e95f6f

Analysis

max time kernel
148s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 23:24

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General

Target

2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe
Size

70KB
MD5

48ad9e46b83c217e36ba6ae4c504eae9
SHA1

c67199753a5f085d6975623ac77d2986602c9949
SHA256

9eb1aab4f92d5593b1f7acb731eafa98e71e939f7c2bee696d0de3e122e95f6f
SHA512

fc2e3d7da934fddf2c2ccf7af18e8b631cdf71bc4f573d9d8972e2c66a938a878a010500db063bc46e9dd598fef7e657e8e40ef38fa238a2f6684b201ebf88a0
SSDEEP

768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1P9:quJu9cvMOtEvwDpjWYTjipvF2bx1PQA9

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000500000002328d-13.dat	CryptoLocker_rule2
behavioral2/memory/2916-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/756-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000500000002328d-13.dat	CryptoLocker_set1
behavioral2/memory/2916-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/756-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000500000002328d-13.dat	UPX
behavioral2/memory/2916-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/756-26-0x0000000000500000-0x000000000050F000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
756	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000500000002328d-13.dat	upx
behavioral2/memory/2916-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/756-26-0x0000000000500000-0x000000000050F000-memory.dmp	upx

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 756	2916	2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe	82
PID 2916 wrote to memory of 756	2916	2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe	82
PID 2916 wrote to memory of 756	2916	2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_48ad9e46b83c217e36ba6ae4c504eae9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:756

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:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
70KB

MD5
5fdf3e9a07f61f2cf48693804adb771c

SHA1
405d3ce82a5d41b7ad302466985aa2980303f7b5

SHA256
9d0123feca1fd56d53bc366a0e2577acd9011447b6c9f6c548775ecac3109ad2

SHA512
d8cd960539c8433dadc5d91e50816944b5158ece6ab37f09b838fdc350bc07998425e632d87f07f92ab0965935f1420dc441c7c46f3cad931418dee872c135bf

Download Submit
memory/756-19-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/756-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/756-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2916-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2916-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2916-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2916-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2916-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download