20929b8fc4cdfc737ce84b44a3c7fe4fff5e9729a14744f2718921c6d00e53dc

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:34

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General

Target

2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe
Size

44KB
MD5

4970c2a54404934915948bda26c7354f
SHA1

e25e4dfd8fd9941e99bc8205b6103d4363977458
SHA256

20929b8fc4cdfc737ce84b44a3c7fe4fff5e9729a14744f2718921c6d00e53dc
SHA512

479add34f30d29ecbdac84de6688870ce54b5ce7b1c7234d6566372f716a5faac49f737a6d010a019eb888cfc30b5e84e76b8f7a151152fdf3cf3e4a9a3a5431
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUm3yKu:bm74zYcgT/Ekn0ryfjw

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1524-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/3620-18-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1524-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3620-27-0x0000000008000000-0x000000000800D000-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:

2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

3620 hasfj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3620	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe

description	pid	process	target process
PID 1524 wrote to memory of 3620	1524	2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe	hasfj.exe
PID 1524 wrote to memory of 3620	1524	2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe	hasfj.exe
PID 1524 wrote to memory of 3620	1524	2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_4970c2a54404934915948bda26c7354f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1524

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:3620

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
44KB

MD5
312679ece1cc2988a836f62dd1b5729e

SHA1
ef34792ba01780910e98de985416a48f21eaac65

SHA256
24dbeae1d235c5b9c7d5966a02a582e3f25397843ff02204571b5eb4ba07f100

SHA512
43a3ad54a3764d380e584ad0350d62a25de1851cbfafd5339465cfac8be53b88f244184b5bfd1aa831aa244c84d2eba718cc2b9770e14c00a4b315c5787dfb05

Download Submit
memory/1524-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/1524-1-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/1524-9-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/1524-2-0x0000000003010000-0x0000000003016000-memory.dmp

Filesize
24KB

Download
memory/1524-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3620-18-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/3620-26-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/3620-20-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/3620-27-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download