96fb8ead58213464d16cb84f1e3e864282f6020ff55c41395078509b08236911

Analysis

max time kernel
148s
max time network
150s
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 20:22

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General

Target

2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe
Size

61KB
MD5

0ea4407915807f0ae6e2efea7dc38303
SHA1

c7eb0e069a7ce3092e476c340a368099d0de9441
SHA256

96fb8ead58213464d16cb84f1e3e864282f6020ff55c41395078509b08236911
SHA512

d07388b809f6b57ae322ea175cf757181b0f7930f682c34e20153ece168a4bdd41e0b710a9fe992b8b679cf86210fb212f3d45176b81be1ddae23b58872e5249
SSDEEP

1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb61vSbgtso:BbdDmjr+OtEvwDpjM8g

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4640-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3628-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4640-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3628-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4640-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3628-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4640-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3628-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4640-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3628-27-0x0000000000500000-0x0000000000510000-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:

2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation	2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3628 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3628	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe

description	pid	process	target process
PID 4640 wrote to memory of 3628	4640	2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe	asih.exe
PID 4640 wrote to memory of 3628	4640	2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe	asih.exe
PID 4640 wrote to memory of 3628	4640	2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_0ea4407915807f0ae6e2efea7dc38303_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4640

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3628

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
61KB

MD5
c3c4c14b5eed7526927c49b6c5e8e1a4

SHA1
b8472904faeca31b1cd25cd9f0712c1a83a976aa

SHA256
42e2b208b7f46b75243a44b6880864b97e5f9c039445b3c7116ad50c8e419f76

SHA512
761d9650a472b24ad604f8bcd7ddf9245b0a8d84eadcdeb37198878ecf8cd189eec846999fce2aec47053fa96ad32332a33c8ac66108f7c5c9785b865fdde1c5

Download Submit
memory/3628-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3628-22-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3628-20-0x0000000002090000-0x0000000002096000-memory.dmp

Filesize
24KB

Download
memory/3628-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4640-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4640-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4640-2-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4640-3-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4640-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download