967b0a294913160d043e3305e231cbd4a7452fbc827c6f6eaa835069545a6035

Analysis

max time kernel
150s
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
22-05-2024 02:53

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General

Target

2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe
Size

50KB
MD5

eed654b8d512f0d9c175e4709755d0da
SHA1

5a353785428efb98024654be73e23333ef0caa99
SHA256

967b0a294913160d043e3305e231cbd4a7452fbc827c6f6eaa835069545a6035
SHA512

749ec69eaef6fca07dcfe0784ea8a81da2fc8502d3ca9fee5d1fc07324059fa6cc5eccce616266e868446a5f4e32730d28286329f832846777cb8fd79f93ccab
SSDEEP

768:qmOKYQDf5XdrDmjr5tOOtEvwDpjAajFEitQbDmoSQCVUBJUkQqAHBIG05W2Moccl:qmbhXDmjr5MOtEvwDpj5cDtKkQZQj

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4428-16-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2876-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4428-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2876-19-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4428-28-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4428-16-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2876-19-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4428-28-0x0000000000500000-0x0000000000510000-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_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation	2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4428 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
4428	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe

description	pid	process	target process
PID 2876 wrote to memory of 4428	2876	2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe	asih.exe
PID 2876 wrote to memory of 4428	2876	2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe	asih.exe
PID 2876 wrote to memory of 4428	2876	2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-22_eed654b8d512f0d9c175e4709755d0da_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2876

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:4428

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
50KB

MD5
defb8575ce785d10ddd7421ed4b6738b

SHA1
823fea7e8c2fc76ac534865b3aa6ed1222c836aa

SHA256
39f574e93234e75c0ea9d53b4cb30db94c8e05bec6f041cdd8c46166038ad74c

SHA512
9a73c4ef3465340d0f3b32aeaa28f7ed43e18e617d01e13d73cde0b82d37fefb6e2f3d322e83642c25421df120663693285641e41d170327c557d5b2dd0b3fc9

Download Submit
memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2876-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2876-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2876-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2876-19-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4428-16-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4428-21-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4428-27-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4428-28-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download