4a3be337cf95c48c551d21e11532fcb4b6dbeb5670159b0d23ea9fb9cf04d2be

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
12-02-2024 17:45

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General

Target

2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe
Size

31KB
MD5

a24b19083c379be893b87045d5702c00
SHA1

d187c6826702367336581c0b2b94fff9975ccab7
SHA256

4a3be337cf95c48c551d21e11532fcb4b6dbeb5670159b0d23ea9fb9cf04d2be
SHA512

8c78c206029c6d81a3eb037beaf55ff0bd2a4cca72cc8e00f5a25a2f38a15048936cca01ef179fe70b3a1980ccb933dd7408284fc7aa443fbd1a5d11a6ef774c
SSDEEP

768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+4tHd:q0zizzOSxMOtEvwDpj/arq9

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4116-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2832-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2832-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4116-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4116-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2832-26-0x0000000000500000-0x0000000000510000-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:

2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2832 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
2832	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe

description	pid	process	target process
PID 4116 wrote to memory of 2832	4116	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe
PID 4116 wrote to memory of 2832	4116	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe
PID 4116 wrote to memory of 2832	4116	2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_a24b19083c379be893b87045d5702c00_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4116

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2832

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
31KB

MD5
c0ab8f0a1e877f0f660ba23c212cf063

SHA1
f2e9df633154fc3a88064f0e0cb77716a778f776

SHA256
8e66536b42914ce808d45b3386f921c48c39c48e1d1f08ebf85940c96b8bd2a7

SHA512
b8be65f8e982224e8b85030b4a673cc2116a092c07966a192ba08545acdc3a3de6536c8d29db18af1c5afd9519e2e7c3d146d75216dcf45edc924da86fa9af5b

Download Submit
memory/2832-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/2832-20-0x0000000000640000-0x0000000000646000-memory.dmp

Filesize
24KB

Download
memory/2832-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4116-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4116-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4116-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

Filesize
24KB

Download
memory/4116-3-0x0000000000610000-0x0000000000616000-memory.dmp

Filesize
24KB

Download
memory/4116-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download