7a1a565e8bbbcbdfd2e6d73c7c915ddab4d1a4c8ca4946a284980e4cbbeab374

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 17:47

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General

Target

2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe
Size

69KB
MD5

b4ce5ceeaab24b69fe1de489b4decd31
SHA1

342e38cf8e3920713d04df67469046f8d234c594
SHA256

7a1a565e8bbbcbdfd2e6d73c7c915ddab4d1a4c8ca4946a284980e4cbbeab374
SHA512

19927bb2a8658c58641a9870915aee4a30e9ead34da5d97f682395caa248e7a68cf883a64cab92617f0e005d5cf1ff8ec0f4b2e5957450ba11f721f872245277
SSDEEP

1536:Dk/xY0sllyGQMOtEvwDpjwycDtKkQZQRKb61vSbgZ3QzNKU4PE:DW60sllyWOtEvwDpjwF85l

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/5044-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5044-0-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/5044-17-0x0000000000500000-0x000000000050B000-memory.dmp	CryptoLocker_set1

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_b4ce5ceeaab24b69fe1de489b4decd31_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_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1708 asih.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
1708	asih.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe

description	pid	process	target process
PID 5044 wrote to memory of 1708	5044	2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe	asih.exe
PID 5044 wrote to memory of 1708	5044	2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe	asih.exe
PID 5044 wrote to memory of 1708	5044	2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-12_b4ce5ceeaab24b69fe1de489b4decd31_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5044

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:1708

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
69KB

MD5
f1719fe65433397c33a88efc5a6a8493

SHA1
33caa784425388b423bb6dfd5e26b6fe6dcd857d

SHA256
82571f87f27577f94688ad792bf6a448dec2b6a880f34bc1df297c8b30e8bedd

SHA512
8175a806af6ee144d6c0ea1b72d6ce2868e97be07fd760721f812b764cf90dca870cabe8865a9a8db3ca522b1b538cea09c6104f2a8a025691cc2f0679ca66b1

Download Submit
memory/5044-0-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download
memory/5044-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5044-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/5044-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/5044-17-0x0000000000500000-0x000000000050B000-memory.dmp

Filesize
44KB

Download