65f576898f380950826eba684f7a43e116fb1b92be82cb0f6796395219b87018

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 20:32

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General

Target

2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe
Size

39KB
MD5

6bf8df18cde8c146382367dde1c9b305
SHA1

72124f4be948d685d89c3bf6dea0d877c0af8a90
SHA256

65f576898f380950826eba684f7a43e116fb1b92be82cb0f6796395219b87018
SHA512

34200a95905f6a9e951967b015f8b0623084406f5e4dc9ea1c866f1f15ccb92ca2fa2a3e1c6d12f2f1fcbc6dd1be9c4ff187d012d3af82a8f34fd6d75147c63d
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlaJWD:b/pYayGig5HjS3OY

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000002322e-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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2784	retln.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 532 wrote to memory of 2784	532	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	84
PID 532 wrote to memory of 2784	532	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	84
PID 532 wrote to memory of 2784	532	2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_6bf8df18cde8c146382367dde1c9b305_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:532
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2784

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\retln.exe

Filesize
39KB

MD5
370a24e6b4156893b2f06ff88ce118b7

SHA1
70b2aa7befefbfe0443f06c5ae9dcc9062474159

SHA256
133db328fe146c651aca5f8b28d364a62dcdaa66b4ad104cd298dfd423dfc677

SHA512
d8aca77fcd62b1af27633752a5ab08e9cde36b5269fcbeace77c2965b6972244c9b6f587762175e23123e01edd68fcdaa878a518cec3ebf59330fe7dcee9ff37

Download Submit
memory/532-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/532-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/532-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2784-20-0x0000000002060000-0x0000000002066000-memory.dmp

Filesize
24KB

Download