944a5942c0c5307834eb2fd06c651496ff3333588b6bafb5ad993318d14ea90c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 04:18

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe
Size

68KB
MD5

fb0167ce539bd5847899616790efd931
SHA1

eca13b95b9ef02e076fde27593e275cfa856cdb5
SHA256

944a5942c0c5307834eb2fd06c651496ff3333588b6bafb5ad993318d14ea90c
SHA512

c19c4f41128d864382e00c350134e1c7a1970a6b2b34b1d65039e22eaaf6dda840f5180a174c4207e5d36ab08a31e49020fd008a976f7c1f90635e60440e6c10
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKUb:DW60sllyWOtEvwDpjwF85V

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/2432-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023172-13.dat	CryptoLocker_rule2
behavioral2/memory/2432-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/2432-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023172-13.dat	CryptoLocker_set1
behavioral2/memory/2432-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4312	asih.exe

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 2432 wrote to memory of 4312	2432	2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe	85
PID 2432 wrote to memory of 4312	2432	2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe	85
PID 2432 wrote to memory of 4312	2432	2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-05_fb0167ce539bd5847899616790efd931_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4312

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

Loading Replay Monitor...

Downloads

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

Filesize
68KB

MD5
ee072ad813fe7e1da8d793944afd3001

SHA1
be55135d7b17f32592138a2c52a8382c1174f394

SHA256
7892da86600c3a9be2c9d1ae1dc3f53d14034bb380d0020c2b7955a1c86b9b69

SHA512
65b7d61a8b536157b3793f7e1d673cebf9f4208ae224d81c5971d2337a879ea2208f9ee55fc6a0e99d97a74cffafd9ad1f5e11049ee56de288bb15cdabe3843e

Download Submit
memory/2432-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/2432-1-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/2432-2-0x0000000002310000-0x0000000002316000-memory.dmp

Filesize
24KB

Download
memory/2432-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/2432-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4312-19-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4312-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download