59ac5194bcb3351b74bb63955d5c8fccdc041b9af1ffeb95f03845c9a8c7aaeb

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22/05/2024, 15:22

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe
Size

91KB
MD5

00fd1b883e08a7bef245069d2afdd7db
SHA1

960de92f97c77845a2b0cad32734de757f86e55f
SHA256

59ac5194bcb3351b74bb63955d5c8fccdc041b9af1ffeb95f03845c9a8c7aaeb
SHA512

2d14c217284c4effde4ad03b13d198faf191abe19f62d2fc5ddeb7705675a1082238991bdc36ff1719e521fa3fe03d6b5d8360e3c1953220dc8b1f2a17a89738
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/Db:n6a+1SEOtEvwDpjYYvQd2Pg

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0005000000023276-13.dat	CryptoLocker_rule2
behavioral2/memory/2152-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5044-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0005000000023276-13.dat	CryptoLocker_set1
behavioral2/memory/2152-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5044-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0005000000023276-13.dat	UPX
behavioral2/memory/2152-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5044-25-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2152	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0005000000023276-13.dat	upx
behavioral2/memory/2152-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/5044-25-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2152-27-0x0000000000500000-0x0000000000510000-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 5044 wrote to memory of 2152	5044	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	85
PID 5044 wrote to memory of 2152	5044	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	85
PID 5044 wrote to memory of 2152	5044	2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_00fd1b883e08a7bef245069d2afdd7db_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2152

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
91KB

MD5
a6c5c84584ba172beb78f1a795c696a1

SHA1
d26936ffd0688dfa78cf7e56e9b39c43cb042a63

SHA256
15425998d4da2ac0f11bce69cea758b54d45ebd48f67ea7df9c8f25ae1576652

SHA512
b80664635c045bd26d70d3ef2056805834fa31fcf29e2880ebe96ebbb4d2fed038e7de3d0865cbce3fd49e34c9ac5880da6e705a40f7726b35e04071dd85a2b8

Download Submit
memory/2152-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2152-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2152-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/2152-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5044-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5044-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/5044-3-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/5044-2-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/5044-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download