030f48a76491c0b53aedf055847ba7fe86689dc6f165cd45d5c878c6015e8ae3

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
29-05-2024 15:45

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General

Target

2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe
Size

45KB
MD5

bf5f551746b6e5b285300a39b4ad5c30
SHA1

e619ff231b269af7624441a3c7852df8f981dceb
SHA256

030f48a76491c0b53aedf055847ba7fe86689dc6f165cd45d5c878c6015e8ae3
SHA512

d6d8d23fea7af31079867d5a65e8e64a06039f89858dc41017b6dd61c9bba30406a1e3f6569d28e820279294c9a1b248b189d4926279f807c61b457efcc8d6f9
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUIDd:bm74zYcgT/Ekn0ryfjvd

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/4564-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0009000000023412-13.dat	CryptoLocker_rule2
behavioral2/memory/4564-18-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3704-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3704-26-0x0000000008000000-0x000000000800D000-memory.dmp	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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3704	hasfj.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 4564 wrote to memory of 3704	4564	2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe	82
PID 4564 wrote to memory of 3704	4564	2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe	82
PID 4564 wrote to memory of 3704	4564	2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_bf5f551746b6e5b285300a39b4ad5c30_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Users\Admin\AppData\Local\Temp\hasfj.exe
  "C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
  2⤵
  - Executes dropped EXE
  PID:3704

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\hasfj.exe

Filesize
45KB

MD5
40b548eb2d28aa7abd2028ddbb72acf6

SHA1
5536111126e8dac9c72f0d7abbb04db3468e2ce5

SHA256
f0a4d8bd818b61c9ebc102d323543d1252fa7fb85a2f358d4271b23f371ec2f4

SHA512
c7ebdce3b287e7731db2a0b15ee2bce485c99b461decafe2435d04021073bd2222e8cef570d1209037fac1adb2d7bc45c5f901cbb4c432176581a86140148e51

Download Submit
memory/3704-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3704-26-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4564-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4564-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4564-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4564-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/4564-18-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download