f7ef7492acd64edebd38128e8132f58e198ba40005f631696dbf5a25265866d9

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 01:00

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General

Target

2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe
Size

39KB
MD5

2d3b7a94d371bdb0e875337b2c5d62df
SHA1

e9a4b43d8990b9a385540cc8c21509fc427b65eb
SHA256

f7ef7492acd64edebd38128e8132f58e198ba40005f631696dbf5a25265866d9
SHA512

3b5db9276afec7d579b4eb3dd16e291b67d235c794830c1c7c739a1e6104216f549883cc597d39045067675344314355719c629aa776125c57331f6cfb417c5b
SSDEEP

768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLNWL:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkL+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/712-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_rule2
behavioral2/memory/3952-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/712-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/712-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e970-13.dat	CryptoLocker_set1
behavioral2/memory/3952-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
behavioral2/memory/712-18-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation	2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3952	asih.exe

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 712 wrote to memory of 3952	712	2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe	86
PID 712 wrote to memory of 3952	712	2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe	86
PID 712 wrote to memory of 3952	712	2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_2d3b7a94d371bdb0e875337b2c5d62df_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:712
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3952

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
39KB

MD5
450ad71453c46244a00e0b21c13e19d8

SHA1
cc138b6b26f80b354af0e6226ecfd24d03afd204

SHA256
a7e3e9f2491266c00a217179d578740fe69410db8763ec6f107136b220628d9e

SHA512
0fe5f6e48301607cf767f0188d2f9da4bb06a96cc43f103cd2072cf2bc4434913a926a51550665100e81198a119cbd6af9a0d4cbd1c2b57badde0280359966bc

Download Submit
memory/712-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/712-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/712-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/712-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/712-18-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3952-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/3952-21-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/3952-20-0x0000000001F50000-0x0000000001F56000-memory.dmp

Filesize
24KB

Download