d98895867143ec5c69f3f8c9a8d1769b11380f36ac5f897ece5ae28d62eef63a

Analysis

max time kernel
150s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-04-2024 22:37

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General

Target

2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe
Size

31KB
MD5

91b225b22e87d262ed81052e7fee84bb
SHA1

1f6395ae0dd8bb10acc4861844d949c7fbd555f8
SHA256

d98895867143ec5c69f3f8c9a8d1769b11380f36ac5f897ece5ae28d62eef63a
SHA512

2ef313de3a55f9347f0926cc8c2024adc2b260cbed5d10dae9b9932957366741cc99be40d66ee66c537f965d640bca8cf592e9e888ee0d1947fcff49889b9a3b
SSDEEP

384:bG74uGLLQRcsdeQ72ngEr4K7YmE8j60nrlwfjDUGTjA:bG74zYcgT/Ekd0ryfjfA

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1912-0-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/692-16-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1912-18-0x0000000008000000-0x000000000800A000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/692-27-0x0000000008000000-0x000000000800A000-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:

2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

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

System Information Discovery
T1082

pid	process
692	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe

description	pid	process	target process
PID 1912 wrote to memory of 692	1912	2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe	hasfj.exe
PID 1912 wrote to memory of 692	1912	2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe	hasfj.exe
PID 1912 wrote to memory of 692	1912	2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_91b225b22e87d262ed81052e7fee84bb_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1912

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:692

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
31KB

MD5
f38631670ad242efb655ca7f71b63306

SHA1
18ce9841d2f724eec5f049a507e59e0b5f4808c4

SHA256
fe5ad1d1f7e131a4a4b2b36fd2990fb4eb299365f9701128dd8bec5c20e28693

SHA512
2fecef7656b7652442f8cc19d41bd6d9da4aadd5c42d3d6d3babb65666ec40378efc78dc973f8d0cfbbac8aace984f8bc2241539d53b154bcd7576eb6fdccacc

Download Submit
memory/692-16-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/692-20-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/692-26-0x0000000002D60000-0x0000000002D66000-memory.dmp

Filesize
24KB

Download
memory/692-27-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1912-0-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download
memory/1912-1-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1912-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/1912-9-0x0000000002EA0000-0x0000000002EA6000-memory.dmp

Filesize
24KB

Download
memory/1912-18-0x0000000008000000-0x000000000800A000-memory.dmp

Filesize
40KB

Download