d3189c75d70b79bf080611974bcfe553b235bfd4e0b7fad16f500e32c489e2db

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
28-03-2024 03:45

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General

Target

2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe
Size

50KB
MD5

62c314e29f9745dd12610b7b4b88b31d
SHA1

a5e983bd20a59114efb037c17b3ab6426cea9275
SHA256

d3189c75d70b79bf080611974bcfe553b235bfd4e0b7fad16f500e32c489e2db
SHA512

5d9d9740bc9dbe6633ccecec1d04d6e1c6e89f3fd8733be751774ae68a6c0d917c312e8ade0fd664b874fa2a387c2c1501f8219d5a67afafc516b4e75d447b96
SSDEEP

768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vxmlcOUNAl:X6QFElP6n+gJBMOtEvwDpjBtExmliWl

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023165-12.dat	CryptoLocker_rule2

Detection of Cryptolocker Samples 1 IoCs

resource	yara_rule
behavioral2/files/0x000c000000023165-12.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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1528	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 5040 wrote to memory of 1528	5040	2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe	83
PID 5040 wrote to memory of 1528	5040	2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe	83
PID 5040 wrote to memory of 1528	5040	2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-28_62c314e29f9745dd12610b7b4b88b31d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5040
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1528

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
50KB

MD5
cb0795665e0a27118aeb3535483d5f1b

SHA1
fefaf07f545512d636cb1167a7b7c94c554f9c8e

SHA256
b41e33200bc48a9dfd7eb5c54caa214f14b9f4730289e72de701f2395a532c1c

SHA512
30603e51b5aa8e49f61ae31b12fff85c97ade4caa631de80fc841eb55a130d00e9d4ac89149c32a6d08531c32b553d284d953a5559d42fb10b1140982be83f2e

Download Submit
memory/1528-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1528-19-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5040-0-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/5040-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/5040-2-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download