8deb4a62c6d75a4af231149b2a7e708ff892e56c69cd8b5a6a2dcc2b96bec1bf

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
22-05-2024 02:43

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General

Target

2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe
Size

64KB
MD5

a2d005f1d20479cc19c5c822c1179163
SHA1

02e50fa5a538d181c178306bbb65bae4d08e6812
SHA256

8deb4a62c6d75a4af231149b2a7e708ff892e56c69cd8b5a6a2dcc2b96bec1bf
SHA512

1de335c4c6213be212e07fd2a0b263d13ab4940dacdd7c2a21bc5348626bb9462b35d15d4b7bb14564aad17895dc656d37a7adad95b360a471aff790f4ededb4
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtsin:BbdDmjr+OtEvwDpjM8y

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1684-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4684-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4684-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1684-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4684-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4684-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1684-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1684-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4684-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4684-28-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4684 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4684	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe

description	pid	process	target process
PID 1684 wrote to memory of 4684	1684	2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe	asih.exe
PID 1684 wrote to memory of 4684	1684	2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe	asih.exe
PID 1684 wrote to memory of 4684	1684	2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_a2d005f1d20479cc19c5c822c1179163_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1684

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4684

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
64KB

MD5
75f9efc9df87f8022d3622d038bba5af

SHA1
89ba9ea7dfacccb8d92513ad64979315d5aa34b7

SHA256
4a33c72788911d608bce77fab0412c5565ef147df0f8eeebeea150c679c8c508

SHA512
53c7563eabcce2b3fa728af19fa956734f9738148e37e6c8e3660a61490a2edb8fd10e7fbbd7a0305bb73e3c857bbf22b2afec8495f64c37049e8b4ce10f2433

Download Submit
memory/1684-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1684-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1684-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1684-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1684-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4684-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4684-27-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4684-21-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/4684-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download