31461cf64207787ca6bfb43b9c4ba1093ee6e97b4e0af0eb118c4f51b86b1258

Analysis

max time kernel
150s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 14:54

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General

Target

2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe
Size

36KB
MD5

4ac0ae2335ad35f399cb1052de715ed6
SHA1

7279d3e469aca4e36fa48dcd770a1130633640a4
SHA256

31461cf64207787ca6bfb43b9c4ba1093ee6e97b4e0af0eb118c4f51b86b1258
SHA512

f3c1ef67289f90d9ca0f1f928c720c2c905feb7c3da182c09578edd36fb2aff00178417f87ab2bd43e1747e185844d39b76aa38ff3640c1cb3f636d0b925dac6
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSzn1KkZCb9q8Iuf:b/yC4GyNM01GuQMNXw2PSj1Pqq85

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 2 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023316-12.dat	CryptoLocker_rule2
behavioral2/files/0x0009000000023316-14.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-1-5-21-1904519900-954640453-4250331663-1000\Control Panel\International\Geo\Nation	2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3588	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 3104 wrote to memory of 3588	3104	2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe	96
PID 3104 wrote to memory of 3588	3104	2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe	96
PID 3104 wrote to memory of 3588	3104	2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-11_4ac0ae2335ad35f399cb1052de715ed6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3588

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1424 --field-trial-handle=2272,i,11831746627654527593,10138103687018060346,262144 --variations-seed-version /prefetch:8
1⤵
PID:4272

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
36KB

MD5
2c6e9223058f4068329632406ae87b87

SHA1
610978461b8930b79576ba11c93fc19825d3b0a9

SHA256
6dd191dfb79dc6532b1181deeaf4bef7f62bda468cb43e95d8b8d2ee6a30b038

SHA512
7211b7f958899944b7d61619a7d862dbb63f960bb6833fce6b03cf771b379b1bd6d1ea19a1731e678f477c05c5e4973b096422c2a7ce9ef0b4f5dda9eba3f34e

Download Submit
C:\Users\Admin\AppData\Local\Temp\retln.exe

Filesize
22KB

MD5
366581b74598919a9059ed5a6155dffb

SHA1
23f97812893d91d39df7c165838d83452aa42c7a

SHA256
d14940da70451b8f17d459b23472823021098fc09e25fab755d175f7aaa44a38

SHA512
ff071dfeac3bc542f3cc2663857042af820040a7b421a820f5a7d87785f9267eb62c4d18029c64a67ee12c0a321807bbcc50906f457de249dfc7ae2e644bd682

Download Submit
memory/3104-0-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3104-1-0x0000000002340000-0x0000000002346000-memory.dmp

Filesize
24KB

Download
memory/3104-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3588-24-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download