fe40054ad21851967daa44f1e362602e9594d99e4ae9adb5afe09c45085ab51f

Analysis

max time kernel
165s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-04-2024 04:27

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe
Size

69KB
MD5

c4a6ffa1c075040836c5191fd504119d
SHA1

ab6e33d9bdc42923f85c6be99d62343de4e6d389
SHA256

fe40054ad21851967daa44f1e362602e9594d99e4ae9adb5afe09c45085ab51f
SHA512

3ecd8b7cb42819ffa6e47388034bfaae54867c95b009cafdb92fd677ea1ae717bd48739f800be238e8df231407a0d1d0727c6106d47fe3e363b80c42e53e2220
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU50Y:DW60sllyWOtEvwDpjwF85b

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3488-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001e3d2-13.dat	CryptoLocker_rule2
behavioral2/memory/3488-25-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3488-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000001e3d2-13.dat	CryptoLocker_set1
behavioral2/memory/3488-25-0x0000000000500000-0x000000000050B000-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4056	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 3488 wrote to memory of 4056	3488	2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe	95
PID 3488 wrote to memory of 4056	3488	2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe	95
PID 3488 wrote to memory of 4056	3488	2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe	95

C:\Users\Admin\AppData\Local\Temp\2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_c4a6ffa1c075040836c5191fd504119d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3488
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4056

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3096 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
1⤵
PID:1764

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
70KB

MD5
daf51865055fcf14cca245687e36ef76

SHA1
53d32e2fc5bf41ff444e1c6218fe9cd1e7192e95

SHA256
ad7ecb16d060bcf39461fbc2190a83e4f0b7500d5f36330e258ffcca304cf51b

SHA512
99c63fd1ae8f1f3049c0dd656e31a919b18920a3ca37ca5e52285b2f64909ecbe982141a7d887429e62ffcf8deced8886c094e3fe17a088094bad1d26d9966b8

Download Submit
memory/3488-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3488-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3488-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3488-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3488-25-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/4056-18-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

Filesize
24KB

Download
memory/4056-21-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download