1af99619181b3ea0a962a5a0ad935bef8530cc80df50351e09781b700d1c2744

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 17:35

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General

Target

2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe
Size

43KB
MD5

fde93541a7f96899ee6203251eed5821
SHA1

f1b5b43612fae542893f4f4f5a7a319b86e8d9e4
SHA256

1af99619181b3ea0a962a5a0ad935bef8530cc80df50351e09781b700d1c2744
SHA512

34bf48ace4d2351d62340fb7bb23c639f6c76ca19886c41d6f2f46176b418b522fb035a593d47de24d4050e4786bca2c0a0544c70d2898f833a97d5b4e3acb87
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAVm:b/pYayGig5HjS3NPAVm

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023276-12.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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1996	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 5108 wrote to memory of 1996	5108	2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe	82
PID 5108 wrote to memory of 1996	5108	2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe	82
PID 5108 wrote to memory of 1996	5108	2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-10_fde93541a7f96899ee6203251eed5821_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5108
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1996

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
43KB

MD5
d618f95c959b784c9fa2d54503914da2

SHA1
4af70127ce9856940413dd2dccb4997f1d574221

SHA256
0ecbf01acb6eddef5339f9861565be936a80b4268772fc8039003f667cd1767e

SHA512
cc4fa4cecee45b071c6ab56aedfdcaa487728906bd4b122a8f76b761c7f0aad1af88697e07347b6af77ba2c11cef0abf3ebcb01569ff8c1824934f139e7c93f5

Download Submit
memory/1996-19-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/5108-0-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/5108-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/5108-8-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download