3f8e4c14c0993251158aadf2cacfa5d76ec7e7dfa92d03885638beddc9c9f4f4

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
09-04-2024 12:52

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General

Target

2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe
Size

119KB
MD5

62cbcafd004f21e3e09dd9579dd48b4f
SHA1

5933a1067f610b454bce80361dcb2c99e557e352
SHA256

3f8e4c14c0993251158aadf2cacfa5d76ec7e7dfa92d03885638beddc9c9f4f4
SHA512

7a5da1553959232a8e25e0dab9b790bb48f6e5d527884db9b3a41657a081509b9872e515a7d35711c9e49dcb5a92595e9a3ccdedf756927cc8269aa70a6aa4a8
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbN/PKwNgp018:z6a+CdOOtEvwDpjczK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023203-12.dat	CryptoLocker_rule2
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2432-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023203-12.dat	CryptoLocker_set1
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2432-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023203-12.dat	UPX
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2432-26-0x0000000000500000-0x0000000000510000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2432	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5032-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023203-12.dat	upx
behavioral2/memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2432-26-0x0000000000500000-0x0000000000510000-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 5032 wrote to memory of 2432	5032	2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe	86
PID 5032 wrote to memory of 2432	5032	2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe	86
PID 5032 wrote to memory of 2432	5032	2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-09_62cbcafd004f21e3e09dd9579dd48b4f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5032
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2432

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
119KB

MD5
cd884f28eb3b267cd97623aaf319b054

SHA1
b21b592da01e8e156b671518f42695eb546564de

SHA256
808a96c927139a30d95623819878c00d49d17468a29f30f53af331f47c699c47

SHA512
fbb6c5d3a1cb9e0bbfde042a018300545a83827f07de9e3b1879b239131223c3a5c4442eac7b62b2db8e07014ee0c8b8d29501300beb4589903c775166ce4c20

Download Submit
memory/2432-19-0x0000000001F30000-0x0000000001F36000-memory.dmp

Filesize
24KB

Download
memory/2432-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2432-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5032-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5032-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/5032-2-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/5032-3-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/5032-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download