76d0eae94a7a89a8cbfc50121b639a2c5dacc2d92db9ef8e1e01d334e938c207

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/01/2024, 12:33

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General

Target

2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe
Size

62KB
MD5

355e4c6bac32489cbc1dca656b82e1f1
SHA1

a3da1d6df46099e8cb625a220e8a526adee39bfa
SHA256

76d0eae94a7a89a8cbfc50121b639a2c5dacc2d92db9ef8e1e01d334e938c207
SHA512

6425bbf0783ba8a4780ac8dc0b1f1555c5b9f0bf9ea63a3a997c96a8e6336b7960dea430d6ad7ff0eb0984fb5c11dc650c0cb41c3cc4acf5ca356ddcdd07816d
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6U2:1nK6a+qdOOtEvwDpjH

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4432-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023164-13.dat	CryptoLocker_rule2
behavioral2/memory/4432-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2876-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4432-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023164-13.dat	CryptoLocker_set1
behavioral2/memory/4432-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2876-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4432-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000c000000023164-13.dat	UPX
behavioral2/memory/4432-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2876-26-0x0000000000500000-0x000000000050F311-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2876	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4432-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000c000000023164-13.dat	upx
behavioral2/memory/4432-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2876-26-0x0000000000500000-0x000000000050F311-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 4432 wrote to memory of 2876	4432	2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe	88
PID 4432 wrote to memory of 2876	4432	2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe	88
PID 4432 wrote to memory of 2876	4432	2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-19_355e4c6bac32489cbc1dca656b82e1f1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2876

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
62KB

MD5
be4eaf0c35cb4a19bd5eb8c89248cb3e

SHA1
106527bfc4faade9b716ea3e6e5653220f980872

SHA256
6d4fddd483267e6424c6da3a7b88b430e0a8e09dcbb3994dfe425a132fa29fb2

SHA512
5f35523535b8a0b22f8b8b8661a0efbb5888782f7e53aa1704ece5e7d16be612d3827e8ca0fc982c0b6cbe0a3fbe8496cc7afeb9a3a0ae9f435ed1edf89783ee

Download Submit
memory/2876-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2876-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2876-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4432-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4432-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4432-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4432-3-0x0000000002240000-0x0000000002246000-memory.dmp

Filesize
24KB

Download
memory/4432-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download