a88d925ca8aa681079b5063de890934f1ca3d479ae4514913b20db0e7db2ab9d

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240319-en
resource tags

arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
submitted
26-03-2024 05:35

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General

Target

2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe
Size

33KB
MD5

557f55d42a59b8283360609d0b0b7bfa
SHA1

2fd9bf4c2f7b6d104f9bff01db4465c51f9da692
SHA256

a88d925ca8aa681079b5063de890934f1ca3d479ae4514913b20db0e7db2ab9d
SHA512

a154d0ef7340e2d07f9a375b475d5aa436b1b578d97c4a122250d7f5ec59fb4d34ecccd3b0ddb35e99c3cc0a9464d1ac147d99980d87059675eda20c6ba3d6df
SSDEEP

384:bmM0V/YPvnr801TRoUGPh4TKt6ATt1DqgPa3s/zzoCt9R0aOtG:b7o/2n1TCraU6GD1a4Xt9R0aOQ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023331-12.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-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation	2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2360	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 996 wrote to memory of 2360	996	2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe	96
PID 996 wrote to memory of 2360	996	2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe	96
PID 996 wrote to memory of 2360	996	2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe	96

C:\Users\Admin\AppData\Local\Temp\2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_557f55d42a59b8283360609d0b0b7bfa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:996
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:2360

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=4308 --field-trial-handle=2000,i,9877262470271371196,11878025205711850266,262144 --variations-seed-version /prefetch:8
1⤵
PID:1420

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
33KB

MD5
2783ead227ed80b2042e3784f08af1be

SHA1
8ac1d6469bcd31021da6e3cb475a8a086a1ab577

SHA256
3f2a6e60fd7b088edc1a1b22b086596a190ee82e7ce092d8200a30f10c71cb5a

SHA512
a86ec71960fbc50a963ed380047031a3768900bd195eaa2faae401cb3d4197572c4b0b9bd6bcd2540f8f7f9eb54786eae8e8646b9c35b23342b9986c7780098c

Download Submit
memory/996-0-0x0000000002220000-0x0000000002226000-memory.dmp

Filesize
24KB

Download
memory/996-1-0x0000000002220000-0x0000000002226000-memory.dmp

Filesize
24KB

Download
memory/996-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2360-20-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download