576aa56cf94ff8753bfe05448ecd5eaff35207e58aefeea089a1da005c4b8680

Analysis

max time kernel
73s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 00:38

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General

Target

2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe
Size

38KB
MD5

96aea6a86175a03bad99f550e2169037
SHA1

add5702ffe74c4d3f784014449ad624c18cde67f
SHA256

576aa56cf94ff8753bfe05448ecd5eaff35207e58aefeea089a1da005c4b8680
SHA512

9c250979144e18a85144c18d5b8a0745c8c8a050610092a65cc2e3b31cd7101c9076cda466e483e8efc8838e7085dac43e572373efe0f5632c7c94e46aea1679
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjxuaPGB:b/yC4GyNM01GuQMNXw2PSjH+PPxVGB

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000600000002328f-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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4876	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 2192 wrote to memory of 4876	2192	2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe	84
PID 2192 wrote to memory of 4876	2192	2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe	84
PID 2192 wrote to memory of 4876	2192	2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-05_96aea6a86175a03bad99f550e2169037_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2192
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:4876

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
48df7e8fb546084ea0b3d5fdb478eaa6

SHA1
65db05cbdafe662e3304b526abfca8e55cc93fd1

SHA256
ae72978a5db16ace563451c380ed1fe8a120da2250a58b2b38f63bd5b44f8ef8

SHA512
25c59a0126ea7cb496087049abd47989b1643ce9d45768d67dd53a6f3367b1ead08a66cceab7b3b09e834e2bf4c920d9e7eaf84777cc5a7717c4c6a2a96cac93

Download Submit
memory/2192-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/2192-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2192-8-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/4876-25-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download