735400b5a20df635fdbe0785ea8753ef26403107d79c06f3288489b840c808dc

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 16:32

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General

Target

2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe
Size

33KB
MD5

2dec9665629bef4d62e36cbe55982d86
SHA1

e330a4ca8ce24d581eacb2938cb2ed0253ac06ac
SHA256

735400b5a20df635fdbe0785ea8753ef26403107d79c06f3288489b840c808dc
SHA512

d5a916cdf48ad1109a4bd103d65797df0400b7df9d17c7d9f90816895eaef8eb2d2f368fb329e56f0482f2881b225dc3fd17ff07b010dea22e47052a64369d2c
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTGXvxC:bG74zYcgT/Ekd0ryfjkA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/220-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/220-17-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1652-25-0x0000000008000000-0x000000000800A000-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:

2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

1652 hasfj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1652	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe

description	pid	process	target process
PID 220 wrote to memory of 1652	220	2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe	hasfj.exe
PID 220 wrote to memory of 1652	220	2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe	hasfj.exe
PID 220 wrote to memory of 1652	220	2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_2dec9665629bef4d62e36cbe55982d86_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:220

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:1652

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
33KB

MD5
f225da7418fef3a8cb73f5eb254c9c24

SHA1
a42685f064d81f80ecb079d68eefbbb3f475311f

SHA256
9157efbe96fef4001fa8d15226259b4ec06138fd9838ab1cb1ba654be02e9901

SHA512
3b4a74e59903b2f2b7ec8aa09ebb4b25d25ed27078222084185b520306b314d8ca08f7ec882f1b2ba269c003ed5c13d5f61031bb47cf33c2423a32298b97c1b0

Download Submit
memory/220-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/220-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/220-7-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/220-9-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/220-17-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1652-19-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/1652-25-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download