de843f6c7adebe8ccd59acda7dd196b133172bc2e922014d918650cfb1a81f61

Analysis

max time kernel
70s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24/04/2024, 01:30

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General

Target

2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe
Size

41KB
MD5

9683b4427c01bf9676d7ec2b6d902960
SHA1

00c24050ed8fa8f13030e8f1a3b224a7dffee87c
SHA256

de843f6c7adebe8ccd59acda7dd196b133172bc2e922014d918650cfb1a81f61
SHA512

c29badb06f42dca2b19d420e0f735fe5eb80b221c3bb5f0fb2a15f12269576d0b453cd3d8f03f98f11a72ad45919bb263296cc741f0a6ae64437ad15f0b5758a
SSDEEP

768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtA2:bCDOw9aMDooc+vA2

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4480-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000001db0e-13.dat	CryptoLocker_rule2
behavioral2/memory/4544-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4480-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4544-27-0x0000000008000000-0x000000000800A000-memory.dmp	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-1-5-21-1132431369-515282257-1998160155-1000\Control Panel\International\Geo\Nation	2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4544	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 4480 wrote to memory of 4544	4480	2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe	85
PID 4480 wrote to memory of 4544	4480	2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe	85
PID 4480 wrote to memory of 4544	4480	2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-24_9683b4427c01bf9676d7ec2b6d902960_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4480
- C:\Users\Admin\AppData\Local\Temp\lossy.exe
  "C:\Users\Admin\AppData\Local\Temp\lossy.exe"
  2⤵
  - Executes dropped EXE
  PID:4544

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
4c8a92f86034d5a893674254d29a99fa

SHA1
6650437e1f2e162f0fabc4c7cc41d3a8938e52e1

SHA256
ff331aa05e4ae696381607d8f90cd11f1ff8d4a73b899916c291fa49e774a33d

SHA512
5a720c4e2ac52dfc135531e05204f55b17495ae9e1c2ffc4dbd2a1168d7102f123545d6852e9ea7e269fb446e98ceb3eb9e647fee4aaf85fe23be8d50b665b24

Download Submit
memory/4480-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4480-1-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4480-2-0x0000000000590000-0x0000000000596000-memory.dmp

Filesize
24KB

Download
memory/4480-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4480-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4544-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/4544-20-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download
memory/4544-26-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download
memory/4544-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download