55ad77d7fb46a7586f9c4c4249a34c8460666b7ff4343c443c91fcc6bc682249

Analysis

max time kernel
148s
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 01:32

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General

Target

2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe
Size

39KB
MD5

1aafeebf448fcd900b6e4ec52e9330ec
SHA1

a335e24f587211fc10d695c98100f3dd545fb7e5
SHA256

55ad77d7fb46a7586f9c4c4249a34c8460666b7ff4343c443c91fcc6bc682249
SHA512

020ba73861475676c68eb76ac5efa1e4b0e926922da6b351b03bdc89f9284de4e6113dfd34056ab5a53e6900d4b89d39c50397f839d01962320186950149d675
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8n:qDdFJy3QMOtEvwDpjjWMl7Tdn8n

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2880-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/412-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/412-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2880-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/412-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2880-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/412-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2880-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/412-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2880-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/412-27-0x0000000000500000-0x0000000000510000-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_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

412 asih.exe

pid	process
412	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2880-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/412-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2880-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/412-27-0x0000000000500000-0x0000000000510000-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_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe

description	pid	process	target process
PID 2880 wrote to memory of 412	2880	2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe	asih.exe
PID 2880 wrote to memory of 412	2880	2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe	asih.exe
PID 2880 wrote to memory of 412	2880	2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_1aafeebf448fcd900b6e4ec52e9330ec_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2880

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:412

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
40KB

MD5
0ad696a2faa7f91062342bead86e348d

SHA1
dd3013389d51f65ea91732a05c6c94154bcdc9b8

SHA256
4aa5714670165f62c2c332fcda5072185c70e41af76a4a09a0d99d29b2d64670

SHA512
f6e0b6467a418798e4ed88876592509dd973bc3b41ce01a8663924962ebb31e82364f61d000d19a20ceb877db0bb1ca38fc9a6134c7b4f2bb8f2324ab0527be2

Download Submit
memory/412-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/412-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/412-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/412-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2880-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2880-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/2880-2-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2880-9-0x00000000021E0000-0x00000000021E6000-memory.dmp

Filesize
24KB

Download
memory/2880-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download