598e500c7a43781550b580b9a935a542de13665f9d3f018bc942ee41380a29e0

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
30/05/2024, 15:26

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General

Target

2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe
Size

76KB
MD5

85d2c5e5448298f410f8e1b8b484e494
SHA1

556c10f474c15ebdedb5b97fdae9d44ef4c99118
SHA256

598e500c7a43781550b580b9a935a542de13665f9d3f018bc942ee41380a29e0
SHA512

8edcb6b5a2161c6670da7b6e934c82695883afb6aee6a17de90350c7844c4bd9a9d22a59e4867d72f174382da1df980c637bde2b0f3b31abc0d31f92feb9a28d
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81Gb:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002348c-13.dat	CryptoLocker_rule2
behavioral2/memory/3968-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3356-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3356-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002348c-13.dat	CryptoLocker_set1
behavioral2/memory/3968-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3356-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3356-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000800000002348c-13.dat	UPX
behavioral2/memory/3968-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3356-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3356-27-0x0000000000500000-0x000000000050F311-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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3356	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3968-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000800000002348c-13.dat	upx
behavioral2/memory/3968-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3356-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3356-27-0x0000000000500000-0x000000000050F311-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 3968 wrote to memory of 3356	3968	2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe	82
PID 3968 wrote to memory of 3356	3968	2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe	82
PID 3968 wrote to memory of 3356	3968	2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe	82

C:\Users\Admin\AppData\Local\Temp\2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-30_85d2c5e5448298f410f8e1b8b484e494_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3968
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3356

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
76KB

MD5
fd88ff12220b946d920f6e8257423c73

SHA1
536ea80b752919bf8128c3b7ba2d9dc14550b258

SHA256
aa0f957b7f2cec1b1ef1e912bc8e141ed49fa6ac536da08b74e00d52ac047ac1

SHA512
3eead2fdc9087cb7c5b3c661ca665f855736d3306f62fe76e6f2bf8b1e088f0d1df9ae41f863737f1b307f9b0b6f1b9175716f61929f26580635cc9aaf3de1c2

Download Submit
memory/3356-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3356-20-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/3356-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3356-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3968-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3968-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3968-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3968-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3968-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download