b2a770398cf439b7c730d2f5a9083cfddb7d32c2d152eb8ea072a2b6711362ab

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 04:04

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General

Target

2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe
Size

43KB
MD5

c89274e6ca5d96b07388694dea1fb445
SHA1

d8f0664307ed85134fa09f0fccd635ac72164f85
SHA256

b2a770398cf439b7c730d2f5a9083cfddb7d32c2d152eb8ea072a2b6711362ab
SHA512

4bce2852dd1ea133ed578dc8ce889718f02f9fd1847e749db023268b0863bece7aab14146126c51efbb00557d8b3b9a42f4f950482d79d8e0196094d98c5c769
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PA9DUq:b/pYayGig5HjS3NPA9D1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x001c00000001e97e-12.dat	CryptoLocker_rule2

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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4692	retln.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 3892 wrote to memory of 4692	3892	2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe	86
PID 3892 wrote to memory of 4692	3892	2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe	86
PID 3892 wrote to memory of 4692	3892	2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_c89274e6ca5d96b07388694dea1fb445_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3892
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4692

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\retln.exe

Filesize
43KB

MD5
dfa8beb452633cbb8b50c66e3b144b2e

SHA1
b2b9c005a3bb5d9c390b19ed36596850c39ea8e7

SHA256
83ca8240e2a586511477714965f73acec00b96fa3ab7e841470a1cace1aac613

SHA512
7add39b2da81b1a032d7163d04d40f836bb83d290c4d8f0c2e9392bbcc0e5777044c2c7e806319cc7179c8581eb3c9e88126a9d778bac745fdd57bcf91770023

Download Submit
memory/3892-0-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3892-1-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3892-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4692-20-0x0000000002000000-0x0000000002006000-memory.dmp

Filesize
24KB

Download