a34b6ac360f92f8ede10d6fa12f9733b5157b8df2174db8d8565bd4a164fbdbc

Analysis

max time kernel
141s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:49

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General

Target

2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe
Size

49KB
MD5

c264ed3b1b9554a2f7aa4b6e1e7b5227
SHA1

d7710b7dd18065b0b7384d7ef0d09ab1399f2903
SHA256

a34b6ac360f92f8ede10d6fa12f9733b5157b8df2174db8d8565bd4a164fbdbc
SHA512

4ce29b6f769a497adb9f88e41d89be07ae91e864ad0550477a963e2c61ed1f80e6749e16a83d9c110a7f78ad569b5f67dbdaf9000b93464ab126d2a0cb7c04c0
SSDEEP

1536:o1KhxqwtdgI2MyzNORQtOflIwoHNV2XBFV72BOlA7ZszsbKY1xzpAIK/:aq7tdgI2MyzNORQtOflIwoHNV2XBFV7N

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\hurok.exe	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\hurok.exe	CryptoLocker_set1

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

hurok.exe2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	hurok.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

hurok.exe

pid process

3880 hurok.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3880	hurok.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe

description	pid	process	target process
PID 4876 wrote to memory of 3880	4876	2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe	hurok.exe
PID 4876 wrote to memory of 3880	4876	2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe	hurok.exe
PID 4876 wrote to memory of 3880	4876	2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe	hurok.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_c264ed3b1b9554a2f7aa4b6e1e7b5227_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4876

C:\Users\Admin\AppData\Local\Temp\hurok.exe
"C:\Users\Admin\AppData\Local\Temp\hurok.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
PID:3880

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\hurok.exe

Filesize
49KB

MD5
31c3f5bbbb3f0a11af2bd42cf3754990

SHA1
e1197f6b4f2e074543ed7a4fed1bea45774263a1

SHA256
3c57b6fb75caad937cb92ae641a2572e5379cdb5596e08851b7198e2f5c28b6d

SHA512
30c995f92885fe3d02f9cbe60711056d3b218da2afdacf330ead005ced8030e43e91472b9b8cccdfe1e8538ebfcdf0b8a5b7098b06f3557cc7543f57b65de68d

Download Submit
C:\Users\Admin\AppData\Local\Temp\hurrok.exe

Filesize
1KB

MD5
801b9fa8612dcbacc6b966babfd7201d

SHA1
66a6d29461d5dd9fadef212a148dc0758b181f02

SHA256
7a596e534b06fc27fb1f1353fbd79f7ffdc603b8dc3f2b88c9d63c886d43d6d4

SHA512
aa64ac7d33e9fc48f074d6822a476caedab82af96f649d0273d8d5cf246faa50722831790275b5b04c669ef0c3ffb542b0d7c433d9349b9f99b969e350b8e662

Download Submit
memory/3880-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4876-0-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download
memory/4876-1-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download
memory/4876-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download