50ef5c15d6d59e08e2e05986fef1488af27250b878e7656efa6a7d4943c2d66c

Analysis

max time kernel
155s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12/03/2024, 01:34

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General

Target

2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe
Size

63KB
MD5

4cc6f67c0fa9f278cbe06734bc6bb97e
SHA1

a6d56123da83ed80f072e99f91989a692e069871
SHA256

50ef5c15d6d59e08e2e05986fef1488af27250b878e7656efa6a7d4943c2d66c
SHA512

8f1b535f33ee3a834ba79ac553548c8463a9606efc99177e6d4381063907897747acf46c3965b39617e0f56d23e1553d0489459850fdd5cc38b90b53ba88ecfe
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoy:1nK6a+qdOOtEvwDpjo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2496-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_rule2
behavioral2/memory/2496-24-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5064-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2496-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000400000002271f-13.dat	CryptoLocker_set1
behavioral2/memory/2496-24-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/5064-25-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2496-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000400000002271f-13.dat	UPX
behavioral2/memory/2496-24-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/5064-25-0x0000000000500000-0x000000000050F311-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	2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5064	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2496-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000400000002271f-13.dat	upx
behavioral2/memory/2496-24-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/5064-25-0x0000000000500000-0x000000000050F311-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 2496 wrote to memory of 5064	2496	2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe	99
PID 2496 wrote to memory of 5064	2496	2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe	99
PID 2496 wrote to memory of 5064	2496	2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-12_4cc6f67c0fa9f278cbe06734bc6bb97e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2496
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5064

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=4032 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:4392

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
63KB

MD5
2b1419dc2826da6086a43f27769c6975

SHA1
e60b20293eda2c2dac1496c6202a2b8350d430a0

SHA256
4e59763e7bca870aeda9334cc9acdc79ff34b01d24093a0aad5f65df1168bc76

SHA512
6a67c15780671d871c0f267b9160bbdda0ccba9beee858c9d4b424d390a6e57445a03afd824b9f12fdb2495484048be2b855c4b91c1aba1ec8e9776df071a319

Download Submit
memory/2496-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2496-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2496-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/2496-3-0x0000000000810000-0x0000000000816000-memory.dmp

Filesize
24KB

Download
memory/2496-24-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/5064-18-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/5064-25-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download