196fbfeb0aae760624c16a2927c844315948c7a6c0b264c2c1919ddc384f62ee

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:45

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe
Size

31KB
MD5

69f3329bb6926b67ca375da86af765e4
SHA1

5e2d2823a9f4549ab326d675f7dcab5ac732992b
SHA256

196fbfeb0aae760624c16a2927c844315948c7a6c0b264c2c1919ddc384f62ee
SHA512

d17b371396603ccc16102f37ce971d066bade976109bf0c64fdee925e4cc405de9dd25b1ac082475c08111f30366c2de721e878c88e9fd19caed965927e6564d
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U8Ss87vhZ:b/yC4GyNM01GuQMNXum+NSnZ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\retln.exe	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

Processes:

2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

3040 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3040	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe

description	pid	process	target process
PID 1192 wrote to memory of 3040	1192	2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe	retln.exe
PID 1192 wrote to memory of 3040	1192	2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe	retln.exe
PID 1192 wrote to memory of 3040	1192	2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_69f3329bb6926b67ca375da86af765e4_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1192

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:3040

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

Loading Replay Monitor...

Downloads

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

Filesize
31KB

MD5
aecd71f7e2562655f27df9a0444a6c58

SHA1
63df4ce3764c2670d0dee8e80f2338426f376107

SHA256
e847241f55edf7eaacebda2e39ad666f44279e03424df8c23026254078a1769c

SHA512
205b4466f6728314b58b05aab006ddaa8a207e6d315859d2842bc18f378d8106cb1ab6a81ad5f083a254364c55327b371018db36809d49afba73457c1c208d1d

Download Submit
memory/1192-0-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1192-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1192-8-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/3040-25-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download