054fbd2c7f8cf7c4316e8e893a36b9f4ca8225a331954746532d3ff44879e486

Analysis

max time kernel
150s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
19/02/2024, 04:57

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General

Target

2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe
Size

58KB
MD5

87be8971dd904840297ccc7f012ef97a
SHA1

316919361e28e646422505a3a10dae5e4791cf66
SHA256

054fbd2c7f8cf7c4316e8e893a36b9f4ca8225a331954746532d3ff44879e486
SHA512

326600da1f98b815d0a1945843edad9dd523835f20d7055cac7f9a375a8550f58198fcf6853acf56b8df934e7db8bfe216870b9b96451456ce9f8d807899aef0
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61PTJ:BbdDmjr+OtEvwDpjMb

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3556-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00070000000231fb-13.dat	CryptoLocker_rule2
behavioral2/memory/3556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1176-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3556-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1176-25-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3556-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00070000000231fb-13.dat	UPX
behavioral2/memory/3556-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1176-25-0x0000000000500000-0x0000000000510000-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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation	2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1176	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 3556 wrote to memory of 1176	3556	2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe	83
PID 3556 wrote to memory of 1176	3556	2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe	83
PID 3556 wrote to memory of 1176	3556	2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-19_87be8971dd904840297ccc7f012ef97a_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3556
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1176

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
58KB

MD5
9bb257d8f36ce2b01afee6d4a4283c36

SHA1
24b19af34a7d4023d3ebef7e75d75a39419152f1

SHA256
b3b12b4a6463a682d4cb3e3dc9e7f3a9768bcf5dc71f6a224d719dbc1adeec43

SHA512
e407c182fa14d1ce74a4d7e6944d7656c18cbd68aba1718293993c3d41fa4ba967cf9edb18d86d0c36610fc8759917d1e3c9adf5a27b63238e41aef0e833cb29

Download Submit
memory/1176-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1176-25-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3556-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3556-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3556-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3556-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/3556-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download