a7721a12af977f1ac27b8b4e647d76f8d28b7023960a054ba9cc1fe2c7365138

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
20/02/2024, 08:35

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General

Target

2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe
Size

126KB
MD5

b964898894760835e59b6b4cdceef8b8
SHA1

2fb16a5b28835e1a780de74f938cdb5c981098ce
SHA256

a7721a12af977f1ac27b8b4e647d76f8d28b7023960a054ba9cc1fe2c7365138
SHA512

1415fcb8e41b0cd60922b37813ea1bdeac100b83442ba7ee798c42ace1f0829c373098addac03965c3241ae63d8f083827662d6b5078c1e269f86418a31f9c5d
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eTb:AnBdOOtEvwDpj6zt

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/452-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000023164-13.dat	CryptoLocker_rule2
behavioral2/memory/452-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/956-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/452-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000023164-13.dat	CryptoLocker_set1
behavioral2/memory/452-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/956-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/452-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000c000000023164-13.dat	UPX
behavioral2/memory/452-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/956-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3791175113-1062217823-1177695025-1000\Control Panel\International\Geo\Nation	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
956	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/452-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000c000000023164-13.dat	upx
behavioral2/memory/452-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/956-26-0x0000000000500000-0x000000000050F000-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 452 wrote to memory of 956	452	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	84
PID 452 wrote to memory of 956	452	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	84
PID 452 wrote to memory of 956	452	2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-20_b964898894760835e59b6b4cdceef8b8_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:452
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:956

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
126KB

MD5
4882fc512ab2aa93bb695449ca75fdf7

SHA1
967b4fd905325f9a8635721f55cebd00256b4f06

SHA256
f250a12f540537e02b2ac4ee937ae8ac2f21ffaca30a56fca294f0d3f1fa3eb9

SHA512
eb0778887d16b3b43cf10d57588bf97691afc2ccc814ae7745ca55ef25d23405703c3996e6f76ed7a20a69303c590d50d671007fcc17999e9db1c892f1cd3c7f

Download Submit
memory/452-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/452-1-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/452-2-0x0000000002190000-0x0000000002196000-memory.dmp

Filesize
24KB

Download
memory/452-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/452-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/956-19-0x0000000000760000-0x0000000000766000-memory.dmp

Filesize
24KB

Download
memory/956-21-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/956-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download