4b9363ffd1ad7ad620d1c5ae490157bc5fa4a9bccef29205e97d2b74a156143e

Analysis

max time kernel
150s
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
27-03-2024 10:36

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General

Target

2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe
Size

32KB
MD5

78cf1feee36e4361d2819666b0a75884
SHA1

bf432c208d13a749605ae20d36ec6d23ed66d86d
SHA256

4b9363ffd1ad7ad620d1c5ae490157bc5fa4a9bccef29205e97d2b74a156143e
SHA512

9e582085052084f913a9f2da1fdd114a247bfe823c4b935f83fe97db770ae370d4a0c3316f9db9f461881b4f4544f68e34f4fad248efcfadc179bf6e7178ddad
SSDEEP

384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9/Bbl:b7o/2n1TCraU6GD1a4Xt9H

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023277-12.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	2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2656	rewok.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 4544 wrote to memory of 2656	4544	2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe	99
PID 4544 wrote to memory of 2656	4544	2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe	99
PID 4544 wrote to memory of 2656	4544	2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe	99

C:\Users\Admin\AppData\Local\Temp\2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_78cf1feee36e4361d2819666b0a75884_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4544
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:2656

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=4132 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:5088

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\rewok.exe

Filesize
32KB

MD5
acb3ab96612029bd9363d9ac569747f5

SHA1
fd7ecd25e2704da2bdec18cf3f90eada368ab409

SHA256
92deecd76c92e8ea83bb955a53276bd6c07c21812a2a4cfef6dd419b273a2e72

SHA512
e8da3187394c2a70e3d947cde2d23ce9257d244f536cfad23b9eed21aff7fc838b8537012f411a5597e4fdd7fe94b25d6134c64d9e425a064afe12721426c05e

Download Submit
memory/2656-20-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/4544-0-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/4544-1-0x00000000022C0000-0x00000000022C6000-memory.dmp

Filesize
24KB

Download
memory/4544-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download