d669a58a8a9cefb67bce669a44a1bdcc49bf27004ca442454a17d15f866a9067

Analysis

max time kernel
141s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 01:47

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General

Target

2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe
Size

67KB
MD5

5d8ff120ae03d51846d40de7633c5020
SHA1

35b7b8a362ea46c694bb0a575c4ea93906a3954f
SHA256

d669a58a8a9cefb67bce669a44a1bdcc49bf27004ca442454a17d15f866a9067
SHA512

4fa09153068edc6b53fbe5a0b4e6f92f8f743ca9f6f7b691c096a4dfffca9fba62b2e3dc3e93cca4812b47f3de4b379d6aab7300a5302eb089d1ac41579f0230
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjYibAoQRj:1nK6a+qdOOtEvwDpjC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3364-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/3364-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3340-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3340-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3364-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/3364-16-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3340-18-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/3340-27-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3364-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/3364-16-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3340-18-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/3340-27-0x0000000000500000-0x000000000050F311-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:

2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3340 asih.exe

pid	process
3340	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3364-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/3364-16-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3340-18-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/3340-27-0x0000000000500000-0x000000000050F311-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:

2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe

description	pid	process	target process
PID 3364 wrote to memory of 3340	3364	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe
PID 3364 wrote to memory of 3340	3364	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe
PID 3364 wrote to memory of 3340	3364	2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_5d8ff120ae03d51846d40de7633c5020_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3364

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3340

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
67KB

MD5
8149ac78e21a77519db0f88b9f71ec7f

SHA1
7e3a6076c4e41fd3790d202ff3ba9fd611b4af36

SHA256
391d59d7c278c8c2e7f79d04a5933f738dcb870238545e5f52499d68eb2b2fc1

SHA512
d7a2ff28ed0d15fb5db43bfa31f9f694af038589dabe37980ca54fbc9e3d0fa1f439bdd1848b589eac24874625d2524c92f3c3a768175c573ec4b7f279720c83

Download Submit
memory/3340-18-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3340-20-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/3340-26-0x00007FFAA3690000-0x00007FFAA3885000-memory.dmp

Filesize
2.0MB

Download
memory/3340-27-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3340-28-0x00007FFAA3690000-0x00007FFAA3885000-memory.dmp

Filesize
2.0MB

Download
memory/3364-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/3364-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3364-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3364-9-0x00007FFAA3690000-0x00007FFAA3885000-memory.dmp

Filesize
2.0MB

Download
memory/3364-16-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download