e7b245c53a5fb2beeee73630ac4ba2fc8ebd960b486ccf698ffcf0d57633b476

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
16/03/2024, 04:08

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General

Target

2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe
Size

47KB
MD5

1fa23ca5f84800b38c5246fdeee77989
SHA1

aee1e65c05a1ba13b3fee24b49de425c4a93972d
SHA256

e7b245c53a5fb2beeee73630ac4ba2fc8ebd960b486ccf698ffcf0d57633b476
SHA512

5c4ca84350c3d6c40bb3c73ca03b30b45a8b35323e252141185f862d6ae351db39bb3b6b1e6bab3741044189b9da9b5760693a29fa0b9fe96180b4f46a115d10
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05WTB+Y3:qmbhXDmjr5MOtEvwDpj5cDtKkQZQ6n

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00090000000231d6-12.dat	CryptoLocker_rule2
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

resource	yara_rule
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00090000000231d6-12.dat	UPX
behavioral2/memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/5020-26-0x0000000000500000-0x0000000000510000-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-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
5020	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 3284 wrote to memory of 5020	3284	2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe	88
PID 3284 wrote to memory of 5020	3284	2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe	88
PID 3284 wrote to memory of 5020	3284	2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-16_1fa23ca5f84800b38c5246fdeee77989_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3284
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:5020

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
47KB

MD5
1ff1a02e618bfc5550bc774d48f5b65a

SHA1
e06936802cdad0be79f095d83cb47eb696faddf9

SHA256
99ea9a44c048fa11671017eca83772e4aff979a8776bb49e91a4caddc1ff170a

SHA512
e708679e43656c308b1d3511dced6e5c33bc06561ecf789f850249212b2a13f80770e9655fbf017270cd9f1f8701ab23e003c300480ce6589c55c4a7cd8476b0

Download Submit
memory/3284-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3284-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3284-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3284-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3284-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5020-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5020-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5020-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download