a46176397842241861983142e6bc7766a2c413cbbdf9155bfb102d55494e8421

Analysis

max time kernel
148s
max time network
150s
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, 15:33

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General

Target

2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe
Size

49KB
MD5

4fca0af95db245fca11fd921d3086cda
SHA1

2023893550c90f49e7cc7de58883fd8a4708ba01
SHA256

a46176397842241861983142e6bc7766a2c413cbbdf9155bfb102d55494e8421
SHA512

e5a3c19855e0456f6de6310cbdc1c88dc5035cd5bbaf67ba834749814d4e57c85bc58fb3dd29d684455184746bc60ac09fe59a29736f8b516dab8a55cf3b2683
SSDEEP

768:79inqyNR/QtOOtEvwDpjBK/rJ+Nw8qnTHYcF:79mqyNhQMOtEvwDpjBxe8GrF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

resource	yara_rule
behavioral2/memory/3780-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023237-13.dat	CryptoLocker_rule2
behavioral2/memory/3780-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

resource	yara_rule
behavioral2/memory/3780-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023237-13.dat	CryptoLocker_set1
behavioral2/memory/3780-17-0x0000000000500000-0x000000000050F000-memory.dmp	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-1-5-21-910440534-423636034-2318342392-1000\Control Panel\International\Geo\Nation	2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4228	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 3780 wrote to memory of 4228	3780	2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe	84
PID 3780 wrote to memory of 4228	3780	2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe	84
PID 3780 wrote to memory of 4228	3780	2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-22_4fca0af95db245fca11fd921d3086cda_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3780
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4228

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
49KB

MD5
9af3537a82fb02c094b26a52dac8395e

SHA1
561ada0d9c0b432f928ae2a493a93e6967163d75

SHA256
4bf9762b5983795eeccffe69b838cb63603eba2cced3e0c7e86b962b8b6bdb36

SHA512
6f685c4fe570668133bd6bab6e872d634f2a84088240c014a5a124b927d7df7eaca6ae4709b6cb15d595d91eca802811af33fa29ab4a1dab1eb3683e8e8ed47a

Download Submit
memory/3780-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3780-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3780-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3780-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/3780-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4228-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4228-25-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download