dc4c87055931cf8d840fb5d0767e91606d35cd45fadfaa0d37c9a87c60ea08ca

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 05:39

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General

Target

2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe
Size

47KB
MD5

b6d8f00c33f8b52fd0aa55b6adb8c671
SHA1

63f8792a5d661402aa29bd9b51fe0b492f6caf57
SHA256

dc4c87055931cf8d840fb5d0767e91606d35cd45fadfaa0d37c9a87c60ea08ca
SHA512

229c9bee1c14d195889e85ab30edc4dc8d958ac78a8e3c67f566b997fd18271953142ebde7092aec8234c9192c81687546a225205f17d0096ccf4ef0b8b3ce3b
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaaEqbIu55id3AMWZu:X6QFElP6n+gJQMOtEvwDpjB0GIWiWLM

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f8-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x00070000000231f8-12.dat	CryptoLocker_set1

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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4940	asih.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 4140 wrote to memory of 4940	4140	2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe	82
PID 4140 wrote to memory of 4940	4140	2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe	82
PID 4140 wrote to memory of 4940	4140	2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_b6d8f00c33f8b52fd0aa55b6adb8c671_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4140
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4940

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

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Downloads

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

Filesize
47KB

MD5
309f585bfc20b58274e0592f7a277c00

SHA1
ebd9e35d291006936a5d3c2e777aea5bd470b0cb

SHA256
997e1480ffc40fbc446c6b7d41ac18ccc1aa3e259784a32bcdfe56e9369eab20

SHA512
1067359a0e1ab3f736684376301098806fbe89ee5cd29cae7d1c147f50f9f8f76bdcecfdc5e9ba84d393e2da86dfba3780bc048e74dc945ae1de968ab64bf575

Download Submit
memory/4140-0-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4140-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4140-2-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/4940-17-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4940-23-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download