0e308ca2ec460e0e5844171ea3c4e160ac429cc8b3de84187fe5e53e13e45fb6

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:26

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General

Target

2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe
Size

60KB
MD5

323f1881200878d2eaf7ba3baa0b308d
SHA1

41384c92dd7869a94c39ee7f799753704b0e9942
SHA256

0e308ca2ec460e0e5844171ea3c4e160ac429cc8b3de84187fe5e53e13e45fb6
SHA512

cd60f24a9ce6b5dc60d050da42b32118d3aeaf493cb83369047bba18f0caf66ef6c5caa4212919b102d1c1c1a6497094c31c536027b77bfa1fc36ab9db8e03e7
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaUf3X:z6a+CdOOtEvwDpjQM

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4400-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4756-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4400-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4400-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4756-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4400-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4400-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4756-26-0x0000000000500000-0x0000000000510000-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:

2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4756 asih.exe

pid	process
4756	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4400-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4400-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4756-26-0x0000000000500000-0x0000000000510000-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:

2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe

description	pid	process	target process
PID 4400 wrote to memory of 4756	4400	2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe	asih.exe
PID 4400 wrote to memory of 4756	4400	2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe	asih.exe
PID 4400 wrote to memory of 4756	4400	2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_323f1881200878d2eaf7ba3baa0b308d_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4400

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4756

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
5d3cedc8fada812ed263718e6606281b

SHA1
e46b1bdec8ea345103681a9a3eb24c53bcdf11a4

SHA256
a007c50e51598989435f4254035be911c0bb67f21f7c0ba1fadf0a2956c66218

SHA512
cd6cb482ad5653f37caa5b75e4c5b7dff0e921f65dac5493b4604ee7a2951c5136e42d9f87a81b4ed70cc66dc824a7feb8f4ed6b6094784319f154337120bf95

Download Submit
memory/4400-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4400-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4400-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/4400-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/4400-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4756-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4756-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4756-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download