5193d2db63a22cfe309e94260169f70f920df0ac9d3aeccc46447816ffdcabc7

Analysis

max time kernel
152s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18/02/2024, 16:51

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General

Target

2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe
Size

41KB
MD5

ecb92fbe76dbe69362cc722483823b13
SHA1

f43513d6eb342855bb69bcd16855f348b72dc537
SHA256

5193d2db63a22cfe309e94260169f70f920df0ac9d3aeccc46447816ffdcabc7
SHA512

b9d1bbd64163ccec2f19031fa505d49ef69a0a66a0e3c0410fba504b072b99665a8c648b02f97d7729dc152709658e6463c09b8f71154ccab68e61538a8dc2bd
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHPbSuYlW8PAaW:b/pYayGig5HjS3NPA1

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000700000002320f-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-1-5-21-635608581-3370340891-292606865-1000\Control Panel\International\Geo\Nation	2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3184	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 4424 wrote to memory of 3184	4424	2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe	84
PID 4424 wrote to memory of 3184	4424	2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe	84
PID 4424 wrote to memory of 3184	4424	2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-18_ecb92fbe76dbe69362cc722483823b13_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4424
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:3184

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
41KB

MD5
c7b676e3b83b01c7a0b8b971534951bd

SHA1
f77ce5d87f3f642212c82524326a340fa7edb3a3

SHA256
0da075220ada2a94e3e7c4976325557e498c526495baf862ff23c63903bd5167

SHA512
6edbbeb6a82ced6a5401f303798699ef167f2a860e30f16975169acbbd5d2c0102e60953cb491ec2e0734cf91fec4eb4b01c611efc1fb02c8a273dc7621b5364

Download Submit
memory/3184-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4424-0-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4424-1-0x0000000000560000-0x0000000000566000-memory.dmp

Filesize
24KB

Download
memory/4424-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download