86350fecd1ca48f4acf6f58d832964103b482fa0e30501bb9f02b004b9061b47

Analysis

max time kernel
150s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:24

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General

Target

2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe
Size

44KB
MD5

377de4b7d0f26bad361f85164387cd07
SHA1

19be1a96d0ab153165df3ab5414039c371bbeade
SHA256

86350fecd1ca48f4acf6f58d832964103b482fa0e30501bb9f02b004b9061b47
SHA512

c5b73b1774f7205b6c66c729fc1d9508938abcc0e0080bdfe2013b7e91cd51c018d4de2d357f8a9b4e2d0c8912609bbce33062a77ddbe6761240d833da87823e
SSDEEP

384:bm74uGLLQRcsdeQ72ngEr4K7YmE8jo0nrlwfjDUpEui0U34:bm74zYcgT/Ekn0ryfjLu/

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2484-0-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\hasfj.exe	CryptoLocker_rule2
behavioral2/memory/2484-17-0x0000000008000000-0x000000000800D000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4780-26-0x0000000008000000-0x000000000800D000-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:

2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hasfj.exe

pid process

4780 hasfj.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4780	hasfj.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe

description	pid	process	target process
PID 2484 wrote to memory of 4780	2484	2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe	hasfj.exe
PID 2484 wrote to memory of 4780	2484	2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe	hasfj.exe
PID 2484 wrote to memory of 4780	2484	2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe	hasfj.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_377de4b7d0f26bad361f85164387cd07_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2484

C:\Users\Admin\AppData\Local\Temp\hasfj.exe
"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"
2⤵
- Executes dropped EXE
PID:4780

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
1cfe4c1b63522d18fda8633636e871da

SHA1
60ced373845ca0506a6f33d07c1ad2277a3579e0

SHA256
b9369252ea5194863b9140bb69e5cddf346d4207722752bcc6e8113e9bca75b8

SHA512
5018caf496b7c0e8bb3339eae09838e9909412b8e45f7296680ab350590806959041ed5ece811f13f00ada251cde4cb2cb356733041ce1c22ba309df66e78ee8

Download Submit
memory/2484-0-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/2484-1-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2484-2-0x0000000003150000-0x0000000003156000-memory.dmp

Filesize
24KB

Download
memory/2484-9-0x0000000002250000-0x0000000002256000-memory.dmp

Filesize
24KB

Download
memory/2484-17-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download
memory/4780-25-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/4780-26-0x0000000008000000-0x000000000800D000-memory.dmp

Filesize
52KB

Download