aa05942e31d1652c99794711862c7e7c8389b86236f9996b816102cc0a588e29

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
22-05-2024 22:51

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General

Target

2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe
Size

44KB
MD5

8fda39ba31c541dbb41f1893f4181ca8
SHA1

d66fa97bd8ff78ce030d03dde1eb47038f1651e1
SHA256

aa05942e31d1652c99794711862c7e7c8389b86236f9996b816102cc0a588e29
SHA512

0f2ea0f0797d4b8844be868ff538ac92b30ad42ff2bbb1241543e21d618cfcef3674b5d345f29f0bea17cd30da4141c1b468693f619f00a393dd8920c1b34d7f
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUIDJ:bm74zYcgT/Ekn0ryfjvJ

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4648-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/4648-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2184-18-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2184-26-0x0000000008000000-0x000000000800D000-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

Processes:

2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

2184 hasfj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2184	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe

description	pid	process	target process
PID 4648 wrote to memory of 2184	4648	2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe	hasfj.exe
PID 4648 wrote to memory of 2184	4648	2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe	hasfj.exe
PID 4648 wrote to memory of 2184	4648	2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_8fda39ba31c541dbb41f1893f4181ca8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4648

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:2184

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\hasfj.exe
Filesize
45KB

MD5
5826965a6698f12ceacd905e776b709e

SHA1
dbd86b91c02e8a94552f3899d78ee8b056e241cb

SHA256
f44bde9e92b6659931edb616435e44ef4269853d7701312ea4f5d77d6a793dea

SHA512
9bfaac4a2356a15fe1d0dbd89de85d55502494f955bc97b032e4cfb611102e535d0963ae211ef3e605f5b63f84b3a8fb8c2bbee73572f301bbce38b3153f0faa

Download Submit
memory/2184-18-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/2184-20-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/2184-26-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4648-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4648-1-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/4648-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/4648-9-0x0000000002120000-0x0000000002126000-memory.dmp

Filesize
24KB

Download
memory/4648-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download