48fe476047a4ac10bc01ce08fa7ace94664bbe22e4b45fe044c42d5721589387

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09/03/2024, 09:31

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe
Size

59KB
MD5

6fbb34d0f0b3c071e8a5373962faa10f
SHA1

5186c9bc68d1e79cc9125628de3ce4ed872c04d4
SHA256

48fe476047a4ac10bc01ce08fa7ace94664bbe22e4b45fe044c42d5721589387
SHA512

8956bc908a96a45d40d46a23f8a054c7945e327b1e05716e8f2de35a59d3cc3ebc2859c016e5304488b67d91a7014faeeef433f825c1bac8d4f41cc801297104
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHNMO:1nK6a+qdOOtEvwDpj0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023254-13.dat	CryptoLocker_rule2
behavioral2/memory/4716-21-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3876-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023254-13.dat	CryptoLocker_set1
behavioral2/memory/4716-21-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3876-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x0008000000023254-13.dat	UPX
behavioral2/memory/4716-21-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3876-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3876	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4716-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x0008000000023254-13.dat	upx
behavioral2/memory/4716-21-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3876-26-0x0000000000500000-0x000000000050F311-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 4716 wrote to memory of 3876	4716	2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe	101
PID 4716 wrote to memory of 3876	4716	2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe	101
PID 4716 wrote to memory of 3876	4716	2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe	101

C:\Users\Admin\AppData\Local\Temp\2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-09_6fbb34d0f0b3c071e8a5373962faa10f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4716
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3876

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=1340 --field-trial-handle=2236,i,5367110156796017614,12594004256180761011,262144 --variations-seed-version /prefetch:8
1⤵
PID:624

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
59KB

MD5
ab2820936d47a95cb8ac6be08cd7c31b

SHA1
855be47db7c8561e9d9722c4a64863dcfe39e217

SHA256
2b48ec613d81dc8fe76ee8ae33a69d3f60f0f87207be4db34cf9e5541a0f59cf

SHA512
67614b9cb7eb3cf0cdb3d8cb4fd7e057f8a5b7a713f2f64678b3503449e949c6abb94d6024dbcd319789d4ef7092310114605ad92740cc6581cc15be0c377862

Download Submit
memory/3876-18-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3876-19-0x0000000000850000-0x0000000000856000-memory.dmp

Filesize
24KB

Download
memory/3876-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4716-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4716-1-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4716-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4716-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/4716-21-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download