af8220992af4d7f5f484724a50fdaf3baee3761f582d633f1e0a685b5aeeb557

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
26/03/2024, 10:03

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General

Target

2024-03-26_f73023ad8efd9d279e1d338915e8988c_cryptolocker.exe
Size

125KB
MD5

f73023ad8efd9d279e1d338915e8988c
SHA1

9d435b3e35a9f2b1247c7be192351b70ddcd56f0
SHA256

af8220992af4d7f5f484724a50fdaf3baee3761f582d633f1e0a685b5aeeb557
SHA512

5cf8d09c3836358abe57791062d580c3dac8abaa20d919fb51a55b38a323a64f6ab8444a863bb26666205d41ee87581a4930756edb3af7b3500a17e1a1101f17
SSDEEP

1536:u6QFElP6n+gWMOtEvwDpjJGYQbN/PKwMgdlo:u6a++OtEvwDpj6z8

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	2024-03-26_f73023ad8efd9d279e1d338915e8988c_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	2024-03-26_f73023ad8efd9d279e1d338915e8988c_cryptolocker.exe	83
PID 5040 wrote to memory of 1528	5040	2024-03-26_f73023ad8efd9d279e1d338915e8988c_cryptolocker.exe	83
PID 5040 wrote to memory of 1528	5040	2024-03-26_f73023ad8efd9d279e1d338915e8988c_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-03-26_f73023ad8efd9d279e1d338915e8988c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_f73023ad8efd9d279e1d338915e8988c_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
125KB

MD5
478b531b4caa3281db83f587078e0946

SHA1
8b6c047d50cea553b8ae8cd0299dca29b7a00a96

SHA256
8ff19663f85fa5ed23b319f11581942d118dbbb400e72cd953ee58378b2aa301

SHA512
94f05eb69e3a1051fcc53dbacc06d5e88f8d1723723f168aea76e7b0f3440e12b7cadd4cb3ab302cfe617ba019a1d71f450c202da12f145acf78b267cb80a532

Download Submit
memory/1528-17-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/1528-19-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5040-0-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/5040-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/5040-2-0x0000000002040000-0x0000000002046000-memory.dmp

Filesize
24KB

Download