8622a32af73a35f30c36ffc70df6f54b98df7a66682cf40cdee05f5a06a42e73

Analysis

max time kernel
150s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 03:04

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General

Target

2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe
Size

39KB
MD5

dfe031e8be8cec744490cc684c053e5b
SHA1

a001cc8b84541535d75bbfc78a87ae7ae34bae0e
SHA256

8622a32af73a35f30c36ffc70df6f54b98df7a66682cf40cdee05f5a06a42e73
SHA512

49d13c83cf0bc817da451fa8a4fa5a558356da7dbf6dbd042f49bb73a32873594a7a69a674eb4905dda8c6fdaa973b90c51d1d4a05318dd9c9c6b99a68a00eab
SSDEEP

384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6AJvDSuYlWjC:b/yC4GyNM01GuQMNXw2PSjHPbSuYlWe

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023120-12.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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1232	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 3348 wrote to memory of 1232	3348	2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe	86
PID 3348 wrote to memory of 1232	3348	2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe	86
PID 3348 wrote to memory of 1232	3348	2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_dfe031e8be8cec744490cc684c053e5b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3348
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:1232

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
83ca8a1876bce639ab36af93d3d701c7

SHA1
84e87e9cb03144aea83b73c136f69b01a040b150

SHA256
89d1e40933243acf6c92376062dd2fbb6b06be7d87f57536ed631f2eb586263b

SHA512
d245a545a647f0e7de4924906e3718c88f9e5e64472ab7ae70201dffea74543cd08012600ffa7123f36b4d1dcd6601d6f11f84492ed9a440bed07bc4633b654e

Download Submit
memory/1232-23-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/3348-0-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/3348-1-0x0000000002260000-0x0000000002266000-memory.dmp

Filesize
24KB

Download
memory/3348-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download