9deb3c9c52a859d3d793284de3f6de383f07c097abf19bc82379df1ca31b6c86

Analysis

max time kernel
148s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-06-2024 03:53

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General

Target

2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe
Size

54KB
MD5

b7ce7f1ffc66ba2ee35d2413343609fc
SHA1

50b1a705b3c1fea6e3fc77a44b7f6587775fd7da
SHA256

9deb3c9c52a859d3d793284de3f6de383f07c097abf19bc82379df1ca31b6c86
SHA512

a93b9c2c7d24277cc2032494aa5dc8849d4d26c06a9ce8813fd3c17026495ba98837467a4b39657688a3c732bbb71ec158d424e44c7ad7bacfceb4c7cf0e5137
SSDEEP

768:b7o/2n1TCraU6GD1a4Xcn62tH/1/Lp17zJIfeVEuUr6rB:bc/y2lm6iH/NLp17zrV9dB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023598-12.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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1884	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 4180 wrote to memory of 1884	4180	2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe	91
PID 4180 wrote to memory of 1884	4180	2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe	91
PID 4180 wrote to memory of 1884	4180	2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_b7ce7f1ffc66ba2ee35d2413343609fc_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:1884

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 --field-trial-handle=1036,i,13640054265074968359,8146127767143474550,262144 --variations-seed-version --mojo-platform-channel-handle=3816 /prefetch:8
1⤵
PID:2552

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
54KB

MD5
f34b067099da5fd63c803a44602d0cbf

SHA1
7f0bca70c45ca6083b4912dd8aa4e3d670d380b6

SHA256
e043d72c624878ceb5d0f98b399695249b52140a6792c2df0a5a01e696d1691d

SHA512
7aea4768dbbc0f2bf0903a81830c777dd592f4d76f7fcfe9dca4814115d597f27ebf5f062a15eaf153d7208e19ffdcc655d9eece4e4b1e16c277aa06e654faae

Download Submit
memory/1884-25-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/4180-0-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4180-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4180-7-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download