289c976ce53d971da288488a1f152cfab7a09b06bcf72b0d9f94d955e89ee2f2

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 02:51

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General

Target

2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe
Size

59KB
MD5

d055c2c8498baa385bd92d0f6117cbae
SHA1

37125b2c4fe61c63648905b684f63f2c2dc37c13
SHA256

289c976ce53d971da288488a1f152cfab7a09b06bcf72b0d9f94d955e89ee2f2
SHA512

5d7b9a4bd17ceac67942f6e453111ee6e7789a7baa90f94bb27355d89224db04b7fa3c2ceddb101aea25e32f190644aec06d199069bd8f758561fa587fdc9d52
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6p5:H6QFElP6n+gou9cvMOtEvwDpjCpVXn

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3960-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1616-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3960-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3960-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1616-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3960-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3960-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1616-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3960-27-0x0000000000500000-0x0000000000510000-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_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3960 asih.exe

pid	process
3960	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1616-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3960-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1616-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3960-27-0x0000000000500000-0x0000000000510000-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_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe

description	pid	process	target process
PID 1616 wrote to memory of 3960	1616	2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe	asih.exe
PID 1616 wrote to memory of 3960	1616	2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe	asih.exe
PID 1616 wrote to memory of 3960	1616	2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_d055c2c8498baa385bd92d0f6117cbae_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1616

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3960

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
e6747fbfb825a94b3f097e9b698c80f5

SHA1
56f5de6e3961890a4dd13180d6abd21af11cc6c2

SHA256
1d33aae41d1dd34fe4d4d91bda6672e801eaf9f86b3fc126ad24bf719b2910d4

SHA512
3e787071deca5733c1d56886441203c49191040ea93b5ab5d61ea6e803e6b7c92c2888d6f708eda5141004570fb149d10311d03e7ae0763ec8c668879a3945d9

Download Submit
memory/1616-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1616-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1616-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1616-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1616-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3960-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3960-26-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3960-20-0x0000000000820000-0x0000000000826000-memory.dmp

Filesize
24KB

Download
memory/3960-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download