e35eb6bb2e4741e7432263b73cf5700bebbcb539c2eb63e93b072f404d5b2c41

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
08/05/2024, 05:30

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General

Target

2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe
Size

43KB
MD5

7818647b4c4a6e3ccd000b53446d5cdf
SHA1

1ef8cea2b511517e1ea11acc44b9f4cae9a3b35f
SHA256

e35eb6bb2e4741e7432263b73cf5700bebbcb539c2eb63e93b072f404d5b2c41
SHA512

9c05dc99f5637746897f37d187e049a0d1f706222e37bfee8f9cc069d327331aae6f908da334b1b40dc61f03ccfb0d4cc8206b4f933cf03a7cf6a9e7cf44edbc
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAekQa:b/pYayGig5HjS3NPAekj

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000002343a-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2984	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 3892 wrote to memory of 2984	3892	2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe	85
PID 3892 wrote to memory of 2984	3892	2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe	85
PID 3892 wrote to memory of 2984	3892	2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-08_7818647b4c4a6e3ccd000b53446d5cdf_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3892
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2984

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
d29773908a3aac12da84df3bf5f03d27

SHA1
be74c518d52df41c51bac5ae9d3090cbc798c370

SHA256
ce0c37bb0d692cc11517a0d5ffa5c478b67ac1d44b276eda0c09fc1804302c15

SHA512
2e3c1852ac6eee25dd9cb4c0ae7176afcd839b553dfb6ab9d6c8c24241f2da3f29749bb3ee193b0b4679bd152db06ca1de2c581c1c704e4b26a4111864224d64

Download Submit
memory/2984-25-0x0000000002210000-0x0000000002216000-memory.dmp

Filesize
24KB

Download
memory/3892-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/3892-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/3892-8-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download