2cb4f3fb9a1f1a88200f07db297cd5114d7ea09d5c592082adf37e46cf4e47ed

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
14-02-2024 02:15

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General

Target

2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe
Size

97KB
MD5

f8ae16dd6801d94ed10593ebb107b322
SHA1

eb3fa36008ff0cb2f3d5743d0892c02e53f5f391
SHA256

2cb4f3fb9a1f1a88200f07db297cd5114d7ea09d5c592082adf37e46cf4e47ed
SHA512

942eac63a2eea809e38ba23d4a05fade67f6f97bedeab133e75c14762ac4404605b4012c546dd32f177e04ba78fcdc5667eac4b9a932c31be81dac87d0c8cfd9
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/BKi5:z6a+CdOOtEvwDpjcN

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4560-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000700000002322f-13.dat	CryptoLocker_rule2
behavioral2/memory/4560-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3032-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4560-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000700000002322f-13.dat	CryptoLocker_set1
behavioral2/memory/4560-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3032-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4560-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000700000002322f-13.dat	UPX
behavioral2/memory/4560-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3032-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3032	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4560-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000700000002322f-13.dat	upx
behavioral2/memory/4560-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3032-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 4560 wrote to memory of 3032	4560	2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe	83
PID 4560 wrote to memory of 3032	4560	2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe	83
PID 4560 wrote to memory of 3032	4560	2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-14_f8ae16dd6801d94ed10593ebb107b322_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4560
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3032

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
97KB

MD5
73ba5cb358fdd80e4571daee1bbc5133

SHA1
1fd397350962b1865672fbfdb4c58f9fea8e66bf

SHA256
23db017c127d08b0aa25743e88b6f7366fb81bcb2d3da96c9b961ef1f95bc023

SHA512
7e6cbd57e493b0d0c3f18fb4bd4f90a46048595e78ec9a6c518ca8281d800d71d8eb6826b813482a55c71fc413381790b1c563b0d4562ce13e5338ff8575c35e

Download Submit
memory/3032-21-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/3032-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/3032-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4560-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4560-1-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4560-2-0x0000000002050000-0x0000000002056000-memory.dmp

Filesize
24KB

Download
memory/4560-3-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/4560-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download