116414352b0758044f7edc10bf625a6e979e2aedb7a15a246f0208cbb61dc1fe

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
22-05-2024 19:57

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General

Target

2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe
Size

40KB
MD5

8b70d8a1740fb95827fcd72eb0ab48d0
SHA1

fc8aec0dcc67b10ca742e7439d0e73426d3c0743
SHA256

116414352b0758044f7edc10bf625a6e979e2aedb7a15a246f0208cbb61dc1fe
SHA512

7dbfa113a9fc4f10ecef1e2e1d31894f64a1fd56d131464bcae384a52d61e599fbc22ecaf73cda16264f7eefe4925c25826ff7cf3ac3eaded7345e8360c764cc
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYljZ:qDdFJy3QMOtEvwDpjjWMl7T69

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1588-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/1588-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2260-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2260-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1588-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/1588-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2260-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2260-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1588-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/1588-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2260-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2260-27-0x0000000000500000-0x0000000000510000-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_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2260 asih.exe

pid	process
2260	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1588-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/1588-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2260-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2260-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe

description	pid	process	target process
PID 1588 wrote to memory of 2260	1588	2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe	asih.exe
PID 1588 wrote to memory of 2260	1588	2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe	asih.exe
PID 1588 wrote to memory of 2260	1588	2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_8b70d8a1740fb95827fcd72eb0ab48d0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1588

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2260

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
40KB

MD5
7867342933c886ee75ea1d8006a6c150

SHA1
21ca76b2d4b4916659090cec37329902a25c651d

SHA256
b3455cb43ea5d616f96a83094a2f64df54ea5ac7d098a69ad9f6ad66ce5869df

SHA512
97d41429c7613dec354678d10f916a3792890e1696cf588c822c5a98f84bc9f817fa9672d88e687e1aec78b451bb29c566998db9f2fb6e8f06bce69d78182b9b

Download Submit
memory/1588-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1588-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1588-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1588-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1588-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2260-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2260-20-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2260-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2260-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download