8fc67271afc598cf892ed868f72ee7f30800db4d1fe7abf563891e4b3a50dc30

Analysis

max time kernel
149s
max time network
151s
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 02:39

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General

Target

2024-05-22_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe
Size

53KB
MD5

7479efaaa0ce70841800dbcf42a97765
SHA1

e369e40338e463a2705b7ce3a5ca0af7fce547bd
SHA256

8fc67271afc598cf892ed868f72ee7f30800db4d1fe7abf563891e4b3a50dc30
SHA512

9aa4b74650508a2d239e17cf98efb55ac80036c5e44389c22e83004519269d5455c0cfe5111144e2c9f3aae7f8ba3be22af2b5e8840e5ee68bd17c7b9baf8207
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOkR:z6QFElP6n+gKmddpMOtEvwDpj31ikR

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/208-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/208-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2732-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2732-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/208-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/208-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2732-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2732-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/208-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/208-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2732-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2732-27-0x0000000000500000-0x0000000000510000-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_7479efaaa0ce70841800dbcf42a97765_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_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2732 asih.exe

pid	process
2732	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/208-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/208-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2732-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2732-27-0x0000000000500000-0x0000000000510000-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_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe

description	pid	process	target process
PID 208 wrote to memory of 2732	208	2024-05-22_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe	asih.exe
PID 208 wrote to memory of 2732	208	2024-05-22_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe	asih.exe
PID 208 wrote to memory of 2732	208	2024-05-22_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_7479efaaa0ce70841800dbcf42a97765_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:208

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2732

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
53KB

MD5
10d9d834be4c8ea4e1219037f721f4c4

SHA1
bbad84410c222e283f496d823641f54e9d262653

SHA256
311e58e452a211fb85eb755010e318e5084ebd0462451d6103fba46a081de82a

SHA512
8bd10b13681b4f7bd55e06eeefea4b909b6dd7e815d3152013c1487fec681083779bf69c88f1be2574e4033ceabf971574a4b8a822e2b3279bd59e52626c1092

Download Submit
memory/208-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/208-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/208-2-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/208-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/208-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2732-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2732-20-0x0000000002100000-0x0000000002106000-memory.dmp

Filesize
24KB

Download
memory/2732-26-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/2732-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download