bb2bf3cd268b9baebfdc53f7388985ce6825c526d76c54fd73a7dc0867e9d32a

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
23-05-2024 02:24

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General

Target

2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe
Size

38KB
MD5

1e1160d259eaec235c7e36f0c2a69749
SHA1

4284107d223d27ab441f2b9a35160ccd811dabc5
SHA256

bb2bf3cd268b9baebfdc53f7388985ce6825c526d76c54fd73a7dc0867e9d32a
SHA512

b2761154133a1fd77871421deffeba36f2aa1cf2c66619cb227168f5aa232184abf3bf3131eacf0b925d3030d3766121179dd6a88aa17ba308f71d4bf29b93d7
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axK38nA:qUmnpomddpMOtEvwDpjjaYaQ8A

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/2968-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2976-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/2968-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2976-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/2968-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/2976-26-0x0000000000500000-0x000000000050F000-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:

2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2976 asih.exe

pid	process
2976	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/2968-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/2976-26-0x0000000000500000-0x000000000050F000-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:

2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe

description	pid	process	target process
PID 2968 wrote to memory of 2976	2968	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe
PID 2968 wrote to memory of 2976	2968	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe
PID 2968 wrote to memory of 2976	2968	2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_1e1160d259eaec235c7e36f0c2a69749_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2968

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2976

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
38KB

MD5
f3b8137c6c6bf9f002a2c0884b0874c7

SHA1
d54fbbac689bd21a881c019c5eaf341b0c88016b

SHA256
441dbd9b4facc78ff6435973e12a499a7e9aac8e4d01bf3b34b50d440867da97

SHA512
7082cb64d9e640dae515ce03e4fb2aac46fc14c8e0d87f076d74310d704b81374ab2f579df0711676c05ba6f3c332d209f3113a34b5ad47076cac90fc71daba8

Download Submit
memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2968-1-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2968-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/2968-9-0x00007FFBBDA10000-0x00007FFBBDC05000-memory.dmp

Filesize
2.0MB

Download
memory/2968-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2976-19-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/2976-25-0x00007FFBBDA10000-0x00007FFBBDC05000-memory.dmp

Filesize
2.0MB

Download
memory/2976-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2976-28-0x00007FFBBDA10000-0x00007FFBBDC05000-memory.dmp

Filesize
2.0MB

Download