daa5c366565db250d6a551170a9d0dd392de9aaaf7e42e12a9e9df3faab27f3c

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
22/02/2024, 17:58

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General

Target

2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe
Size

71KB
MD5

f66f356e92d730b9d7601430e6b72ca9
SHA1

2db5307e6a05baabf94da92621a785e716f81a95
SHA256

daa5c366565db250d6a551170a9d0dd392de9aaaf7e42e12a9e9df3faab27f3c
SHA512

89f99c6481eaa23c07ed1c99207ec63beeeb6e7f1e83ce8b3be0bb5440c0e4b60f6772417ef20ccc9bd734d38eca0ac46e17ef29e7a20e37222cb36ea1093300
SSDEEP

1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHs/:X6a+SOtEvwDpjBZYvQd2w

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001fc40-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000300000001fc40-12.dat	CryptoLocker_set1

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation	2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4948	asih.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4244 wrote to memory of 4948	4244	2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe	88
PID 4244 wrote to memory of 4948	4244	2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe	88
PID 4244 wrote to memory of 4948	4244	2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_f66f356e92d730b9d7601430e6b72ca9_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4244
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4948

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\asih.exe

Filesize
72KB

MD5
8f8eb33810c02600e308d6bcc890fde3

SHA1
fec7e108bc9558fd6282f8c1162533f98840a931

SHA256
1507e095191921abf4b4992b1f620ccfd690d86b7c43b8ad9b67d7e9dd207438

SHA512
248e39616442b36f4f92c269b6a401508179934df6fa0e611a1754414d7f8b280962d16b791fdabca40dc80e6f4f1e65e91c0f3db00ebae9acb6a1555c06fe09

Download Submit
memory/4244-0-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4244-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4244-2-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/4948-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4948-18-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download