c5275c26ecbb8df8b8ef2bc6edaab989b03c344e6a1f6ded8e7a9a539e575486

Analysis

max time kernel
151s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/06/2024, 20:05

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General

Target

2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe
Size

34KB
MD5

fb16f28bdbde027a1e88bb8a0ba160d7
SHA1

7d2615c147f891a518b2267e742c258bc96a02d3
SHA256

c5275c26ecbb8df8b8ef2bc6edaab989b03c344e6a1f6ded8e7a9a539e575486
SHA512

b351fe7de9d012801ea109c3cee90b5892cd56bac64a2939d8e7c43dc75a15b851bd3cf68f0121126ccbd13e7741e57abc0207c67a9b627577e5de8ff1f92acc
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjSKkcJR549Xo:b/pYayGig5Sn+5yY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023219-12.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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4604	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 412 wrote to memory of 4604	412	2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe	90
PID 412 wrote to memory of 4604	412	2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe	90
PID 412 wrote to memory of 4604	412	2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-08_fb16f28bdbde027a1e88bb8a0ba160d7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:412
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4604

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=940 --field-trial-handle=2252,i,16504368816373493055,9578615028378602855,262144 --variations-seed-version /prefetch:8
1⤵
PID:2028

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
35KB

MD5
0bfcb8e3bdaea6f4b4e717c500355725

SHA1
8939582560b02014b938181c94266c923651ed53

SHA256
db7988e2b521c3fb13c51726c92b7137ab753ffff3da04d04e6da31fdf56032f

SHA512
fb27cc6122eff2edcb98373a0b7a1ccacb10ab37278d3da139ec78f5d411bdddbbb71ad7fec690cea26b21df4ab0158bc90abafaa2c26d664977f89d025cc96a

Download Submit
memory/412-0-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/412-1-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/412-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4604-25-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download