30b6722b62da5d86aed00f615584b8deb40bb7f5ee02cf4d16a97e6018cff938

Analysis

max time kernel
152s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21/05/2024, 08:44

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General

Target

2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe
Size

44KB
MD5

629f757f75162ea7ad255f783e969cf6
SHA1

c4a4bf99bb501477bddf5a40488982af4d2d695a
SHA256

30b6722b62da5d86aed00f615584b8deb40bb7f5ee02cf4d16a97e6018cff938
SHA512

811f2246b6a60e329d29cda408fec0942680a3276c53d4ec7afcc2719751c6e434d308824e3845f3f3ee0edba803ce3780f121cdfc11c43cb9ae7296934e459a
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAv:b/pYayGig5HjS3NPAv

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002324f-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	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1932	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 2332 wrote to memory of 1932	2332	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	92
PID 2332 wrote to memory of 1932	2332	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	92
PID 2332 wrote to memory of 1932	2332	2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe	92

C:\Users\Admin\AppData\Local\Temp\2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_629f757f75162ea7ad255f783e969cf6_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2332
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1932

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=3744 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:656

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
44KB

MD5
112466391b9d5ea53bc45e107c01f6ea

SHA1
d84fac07ad6c8c3d57ff73fd866e6cb5edb43945

SHA256
0c0cb1e6a23bf304862ce060a2e302ee74db5d91aa33928e7697930cc456b9e5

SHA512
18733a6bf5c9d6513402592e65c5a286e9c45ff3fa6ca1768dc775a1fd32c15005b9f635136af01f2af68393cd253fa6e846a2b01d0ecdda1347ae2e8a5de691

Download Submit
memory/1932-19-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/2332-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2332-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/2332-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download