5111ccc6849a273606c5eeba1d7850083843bd0c26bfca25e5f0f091ee692ab9

Analysis

max time kernel
150s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 05:02

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General

Target

2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe
Size

34KB
MD5

a040054fe033759c5531b243d4994bdb
SHA1

e6185c1935884f650525b9c6f794cc881dc63307
SHA256

5111ccc6849a273606c5eeba1d7850083843bd0c26bfca25e5f0f091ee692ab9
SHA512

f5e59aa7bd60fa35c42d1b850c9e2968de73388fed5ee5f2991725b73d6550880e06cacfcd534f69c050e6fd6a7de9f5a9976877dd9f6779a76b0f2e65b0ddb8
SSDEEP

768:b/yC4GyNM01GuQMNXw2PSjHC02ltAUAC0:b/pYayGig5HC02gbC0

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000f000000023164-12.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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2280	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 3276 wrote to memory of 2280	3276	2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe	85
PID 3276 wrote to memory of 2280	3276	2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe	85
PID 3276 wrote to memory of 2280	3276	2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_a040054fe033759c5531b243d4994bdb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3276
- C:\Users\Admin\AppData\Local\Temp\retln.exe
  "C:\Users\Admin\AppData\Local\Temp\retln.exe"
  2⤵
  - Executes dropped EXE
  PID:2280

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
34KB

MD5
9d25f8dea071fda95e91a385eb30088e

SHA1
f17e93cd650d3cb3839ed1f8e5b514bb65b305df

SHA256
496d2137da1e40742549e375831d803618ec1fb85c41ff408582b878eed6ec8d

SHA512
497c7efca586d1ae2ab69da4cb5f9975035f4ec32bc297fb8517621ad11a244592b758dfda8a5ce25df144d080e57a490b55e7b185617cc7b223fe2f85060bde

Download Submit
memory/2280-19-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/3276-0-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3276-1-0x0000000002350000-0x0000000002356000-memory.dmp

Filesize
24KB

Download
memory/3276-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download