60f3802351345f89e95407739f0a3bf9efb3aeb34b58e40783885f45ddf6df7c

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 02:29

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General

Target

2024-05-22_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe
Size

40KB
MD5

d32a490a138c9faedca076f736f0f1d7
SHA1

7a8657bfb504b1907effca304a0419bf34b0c5fa
SHA256

60f3802351345f89e95407739f0a3bf9efb3aeb34b58e40783885f45ddf6df7c
SHA512

9fd88a98e0c1ebf42b0e0f1cfc55117020b02456ffeac1cde401763724d2c48a991f24aa09703420a04a0c4d702cd4a1ae04f3bddf306c129ee6b8af6694a0b6
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaB8u:qDdFJy3QMOtEvwDpjjWMl7TdGu

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3528-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4104-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3528-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4104-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3528-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4104-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3528-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4104-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3528-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4104-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3528-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4104-28-0x0000000000500000-0x0000000000510000-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_d32a490a138c9faedca076f736f0f1d7_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_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4104 asih.exe

pid	process
4104	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3528-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4104-16-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3528-19-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4104-28-0x0000000000500000-0x0000000000510000-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_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe

description	pid	process	target process
PID 3528 wrote to memory of 4104	3528	2024-05-22_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe	asih.exe
PID 3528 wrote to memory of 4104	3528	2024-05-22_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe	asih.exe
PID 3528 wrote to memory of 4104	3528	2024-05-22_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_d32a490a138c9faedca076f736f0f1d7_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3528

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4104

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
94f24fbc714fd38d93ef525002b70461

SHA1
542446827653eed8ec51edbd582775b205a9d562

SHA256
757d3fac357ac63d93559925ac8f2c9491053ec61871d6dfcfcd6e0067bade32

SHA512
38134ba3f0f2a76d5b0b466ab44ed206b94aa24b2b25707cb028d840dddc68cad63afc26ad26e5145d540aeaa5d08d8da0996de325ad53e832c4d901cb3fe03c

Download Submit
memory/3528-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3528-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3528-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3528-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3528-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4104-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4104-22-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/4104-21-0x0000000000740000-0x0000000000746000-memory.dmp

Filesize
24KB

Download
memory/4104-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download