842d4b2b794d04a1a35641c775ea4e5c03b42e7cffafc7a786cce0ce1ff8f7cd

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
22/04/2024, 15:11

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe
Size

44KB
MD5

f55e846d2687553469de5d77e954949e
SHA1

658fad24fda314fe88b5ea7647a4ef9549b8ba44
SHA256

842d4b2b794d04a1a35641c775ea4e5c03b42e7cffafc7a786cce0ce1ff8f7cd
SHA512

e5896a544e11e78e664a8b4e7dd5cb889b45267b6ebe17c774674f0e3a4e6aae6177f9698e247f4b89bfbdb648e2b6438e21ce3ba2b1b98413478b62fb021fe1
SSDEEP

768:b7o/2n1TCraU6GD1a4X0WcO+wMVm+slAMphej6NTa:bc/y2lkF0+BeV+

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00090000000233c0-12.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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation	2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2220	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 3900 wrote to memory of 2220	3900	2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe	86
PID 3900 wrote to memory of 2220	3900	2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe	86
PID 3900 wrote to memory of 2220	3900	2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-22_f55e846d2687553469de5d77e954949e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3900
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  PID:2220

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\rewok.exe

Filesize
44KB

MD5
f0dd09b6de74ffbe0d204a4222ddc1c8

SHA1
0603361cb84ec9ee421d20e256fefea04494bd18

SHA256
d220a6306341500f222e8930c537859234cb76cd5e0dcfa83291ae32eff0041e

SHA512
ffe9663a9a3768e9a4781d10e9f05b03346eb2d56ef679c96b2a9f36cc964e6e461ce9bbfea8dd41cc5fff592f8be5c7007642ffcf7a54255e3d28496d52fb21

Download Submit
memory/2220-25-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3900-0-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3900-1-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3900-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download