2f5c6938420563035036cab78fcf84985caaec087418f1e7fb58ec2b799ee08c

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
28/02/2024, 20:54

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General

Target

2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe
Size

72KB
MD5

d9c5b06f4dcdc6fe536c383353d5e6ea
SHA1

4f277fcc2abfe74d4060acdf8e6904ab75f9abd0
SHA256

2f5c6938420563035036cab78fcf84985caaec087418f1e7fb58ec2b799ee08c
SHA512

51e6e26e80a0ad558bcdf808edc77ff4dd63b4e93b641c607825b4f530981427d9c12209a8daa8b4c920579fe62562722b3e6d7a4048782aa6846c568b4acd64
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal8t:1nK6a+qdOOtEvwDpjn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_rule2
behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000001ebc7-13.dat	CryptoLocker_set1
behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000700000001ebc7-13.dat	UPX
behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2460	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000700000001ebc7-13.dat	upx
behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-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 952 wrote to memory of 2460	952	2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe	89
PID 952 wrote to memory of 2460	952	2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe	89
PID 952 wrote to memory of 2460	952	2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2460

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
72KB

MD5
ea4ae3fd97b89a1229079e1fcd200853

SHA1
0676bdf7b126633b33abea48867cf9957a0cf618

SHA256
1b22837dc434179c20d1d9ab9c6e878adf4a7ed8671cac605d119a114a3153b8

SHA512
cc9b4c39708efd8fd17367b46e39d18470217085dc420aad389868060910398ba721851fff9081489844219286d61e988b9b00ef5e11378e4d193e7c90a542e6

Download Submit
memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/952-1-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/952-2-0x00000000004C0000-0x00000000004C6000-memory.dmp

Filesize
24KB

Download
memory/952-3-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2460-19-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2460-22-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download