8a560a91f3c14b05a334804e5ae254e36d29f668225e116c4eb683ba1f882986

Analysis

max time kernel
154s
max time network
159s
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, 08:33

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General

Target

2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe
Size

41KB
MD5

8684bb99ba2b0ff978f23075e8d60ebf
SHA1

7945c128256f40cbcdd1b8c5e1cb815c7f4b478d
SHA256

8a560a91f3c14b05a334804e5ae254e36d29f668225e116c4eb683ba1f882986
SHA512

cf4dc92ac59250f1dfb122300ce73e0617fdbbf71651e53ab701789e80d6ad02a45c8683df0766c210a3f4bda1c93d15363c6fd884c2fd33e781d91acfdd19b2
SSDEEP

768:bIDOw9UiaCHfjnE0Sf88AvvP1oghYvm9/6Dy8PEr:bIDOw9a0Dwo3P1ojvUSDhcr

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002321a-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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3864	lossy.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 1040 wrote to memory of 3864	1040	2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe	83
PID 1040 wrote to memory of 3864	1040	2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe	83
PID 1040 wrote to memory of 3864	1040	2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_8684bb99ba2b0ff978f23075e8d60ebf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:3864

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\lossy.exe

Filesize
41KB

MD5
e1bbfe1196f96c6d79b5cb99300e9c78

SHA1
6637fa264b1f0bdeb57a77084f237aeaf5b8dbca

SHA256
ff1570a67ecd81e864410797123cc2f1269634227e0f3e6c7dd997e5acedbb48

SHA512
7b7d7910a7482d6fa24e4a2a8018e997823d626b9fdb7b307309734002873f5f6ab63158f7418d5ffdb961e6c78369331eb5e10373dc7cec7c1fa09ce9ff8996

Download Submit
memory/1040-0-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1040-1-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/1040-2-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/3864-17-0x00000000020C0000-0x00000000020C6000-memory.dmp

Filesize
24KB

Download
memory/3864-18-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download