1c3aef30bf2bf78113e6ff202e29d6fc86173ab8ba1d6af07488b0fc72cfd76a

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
08/03/2024, 03:54

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General

Target

2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe
Size

46KB
MD5

c4f3e8c37d10adb34b1e5cddaac9aff1
SHA1

d35807966830f65cfdd6844fa9b265f2ecc3dedb
SHA256

1c3aef30bf2bf78113e6ff202e29d6fc86173ab8ba1d6af07488b0fc72cfd76a
SHA512

d311ef330a1ac5efa60bde8850739bae29bef4309933cc6f0871b4a409a476af204ac0fb826a57df4766307a121269051650c30445c7ffe989fc1df564d09d77
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaaEqbIu556Blvu:X6QFElP6n+gJQMOtEvwDpjB0GIWSlvu

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000001e5eb-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000400000001e5eb-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-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
316	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 3856 wrote to memory of 316	3856	2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe	90
PID 3856 wrote to memory of 316	3856	2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe	90
PID 3856 wrote to memory of 316	3856	2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe	90

C:\Users\Admin\AppData\Local\Temp\2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-08_c4f3e8c37d10adb34b1e5cddaac9aff1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3856
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:316

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\asih.exe

Filesize
46KB

MD5
43ab81e8f76258e601697d840c4c8f65

SHA1
1a2f68d9fe9d4b0a6e9810d34ba0a5a3333c8829

SHA256
48d971f19da5f8db4d260803009e508122bf2509fd6f4c826c6c7be178e22e1f

SHA512
fc66e75c0f8b6922dd4c875420bcca17fff206e295fe8199ab52f54968060e52d6a24122ea3a23878b7f081295e08e3fb9704698df50b6a79ac6184ae25bf3e6

Download Submit
memory/316-17-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/316-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3856-0-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/3856-1-0x0000000000630000-0x0000000000636000-memory.dmp

Filesize
24KB

Download
memory/3856-2-0x0000000000650000-0x0000000000656000-memory.dmp

Filesize
24KB

Download