3062b0f1986af41602676a40f7e589cd3a64f3440ae4b71e7326b64807b05f9a

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 03:53

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General

Target

2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe
Size

31KB
MD5

c29c5716711c3c4a6b2c80306c2ef685
SHA1

e820d132777416c35b47107b537e1d35f7296bc0
SHA256

3062b0f1986af41602676a40f7e589cd3a64f3440ae4b71e7326b64807b05f9a
SHA512

b9d5fb2175a1457aef30e255f0eedf0725afe6cf67ab5679949f95277e4e52f098c7c241fb0c0f3f71391e6e7011bfd9a8f2e08e340f9837fa46018976ee244f
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+U8Ss87vh7:b/yC4GyNM01GuQMNXum+NSn7

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_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

retln.exe

pid process

1476 retln.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1476	retln.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe

description	pid	process	target process
PID 216 wrote to memory of 1476	216	2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe	retln.exe
PID 216 wrote to memory of 1476	216	2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe	retln.exe
PID 216 wrote to memory of 1476	216	2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe	retln.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_c29c5716711c3c4a6b2c80306c2ef685_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:216

C:\Users\Admin\AppData\Local\Temp\retln.exe
"C:\Users\Admin\AppData\Local\Temp\retln.exe"
2⤵
- Executes dropped EXE
PID:1476

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\retln.exe
Filesize
31KB

MD5
689670c165b96d24912198011e771d27

SHA1
82e08b55745705d61717aa4eabd8c6d543531aa0

SHA256
1662c377e90723d71b33927ddf2f0ccf64090ec1f6df14d7061614ad176f9b46

SHA512
04ab52d9f2618916d1264d110c27e03c3b77e9122b237ebe8a13c43157cee6da652af245ac62869ca4e6931942d67d920270928da5bcd42d4f444c67cf406158

Download Submit
memory/216-0-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/216-8-0x0000000002160000-0x0000000002166000-memory.dmp

Filesize
24KB

Download
memory/216-1-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/1476-25-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download