b94d00667a127c3af3c1d0c0a96cdfd6c78da0a347361ca20569ef0bdb1d7c24

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
18-03-2024 23:43

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe
Size

40KB
MD5

e0436fdbfc95aa3b00677adfb17defa8
SHA1

65669360c96f76622e5b11bed62424737f58fb16
SHA256

b94d00667a127c3af3c1d0c0a96cdfd6c78da0a347361ca20569ef0bdb1d7c24
SHA512

56cbbc702ea2c1426fd0a2c27a0ed25f8334192a370cf57dbe1cbf0d6b4d71ecfb5dfcbebda2b6d77b3e90f87e82e8da6943ca1dd7cf73c87b8035570aed49d5
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlZcGpV:b/pYayGig5HjS3jcI

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000200000001f656-12.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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4468	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 2780 wrote to memory of 4468	2780	2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe	89
PID 2780 wrote to memory of 4468	2780	2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe	89
PID 2780 wrote to memory of 4468	2780	2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-18_e0436fdbfc95aa3b00677adfb17defa8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2780
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4468

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
40KB

MD5
3432562d2cde7051d6ecd17cbecad8bb

SHA1
1b65173c41cb8c654ec69cffb3880e540956a0eb

SHA256
157fb7f16d26bcef1e9009c7be67f8912da03c358236e051c771e35bd8b27060

SHA512
91947bd266d799dd826983e58719cd30a2486dd7b727e6e5d42a7eaaca8ee6c1552e4f40cb76270313a8c35c4ddde70abf1abb109568377873c6e6fa3e8ec65c

Download Submit
memory/2780-0-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/2780-1-0x0000000002200000-0x0000000002206000-memory.dmp

Filesize
24KB

Download
memory/2780-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/4468-21-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download