71bde2e7e9e9c0095de88257ad615f5a50d91f4e188c7549b4362c82fd732fd5

Analysis

max time kernel
149s
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
24-05-2024 04:10

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General

Target

2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe
Size

60KB
MD5

e5b89afc04cfcf4705fe14eef1fd30d1
SHA1

1226299b21746d200d19fc570033d51be56ba628
SHA256

71bde2e7e9e9c0095de88257ad615f5a50d91f4e188c7549b4362c82fd732fd5
SHA512

019cd2eedc3467cdd958a7c0549c39c1593a71e7b58105702347ae944bb81b4f29564cd3426a71065cc31da82bc90a6c7b1fab5155f594a49e975fb396d41a20
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3j:z6a+CdOOtEvwDpjQo

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2732-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2732-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4500-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4500-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2732-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2732-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4500-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4500-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2732-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2732-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4500-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4500-27-0x0000000000500000-0x0000000000510000-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:

2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4500 asih.exe

pid	process
4500	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2732-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2732-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4500-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4500-27-0x0000000000500000-0x0000000000510000-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:

2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe

description	pid	process	target process
PID 2732 wrote to memory of 4500	2732	2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe	asih.exe
PID 2732 wrote to memory of 4500	2732	2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe	asih.exe
PID 2732 wrote to memory of 4500	2732	2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_e5b89afc04cfcf4705fe14eef1fd30d1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2732

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4500

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
60KB

MD5
ae3fba5d4043d19804bd6b186b145469

SHA1
a34404bbbb9d897d85cec504e2da32b1542d71f3

SHA256
bb3ee86fab2b695021b82c955e4f46ddc68dc0351118cad6334b5c4e65733649

SHA512
eb9be1609aca906c785e39e39d1b0f3349628978ed37136bc083e907a06e15dd8f374d996b0c8e29af9ee5da2ad8a86b5e8bdf3dd4f7c6772bbb806aa171a847

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

Filesize
64KB

Download
memory/2732-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2732-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2732-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2732-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4500-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4500-20-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4500-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4500-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download