23e17a359a6cf7ab99fcb9c6e56334caf0ff90d4bc7cfbc6feae35e59f5dd028

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
20/04/2024, 12:50

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General

Target

2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe
Size

104KB
MD5

7e985b496d976150eed2ba13e3fe9c82
SHA1

d30a9c4b68e241e376a06133b1d2a0d50f83b187
SHA256

23e17a359a6cf7ab99fcb9c6e56334caf0ff90d4bc7cfbc6feae35e59f5dd028
SHA512

005767963ce307313bc02df78cc4434162c7b4e7f714580753339fcbe9da6d2169a8a1223ff0eb074ff4ac9c30104c7ea7fd94f6661d3b95003c4f2c1f8d17ab
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6Gks0+:1nK6a+qdOOtEvwDpjp

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_rule2
behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1016-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x001c00000001e97e-13.dat	CryptoLocker_set1
behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/1016-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x001c00000001e97e-13.dat	UPX
behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/1016-26-0x0000000000500000-0x000000000050F311-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation	2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1016	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x001c00000001e97e-13.dat	upx
behavioral2/memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/1016-26-0x0000000000500000-0x000000000050F311-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

description	pid	Process	procid_target
PID 2916 wrote to memory of 1016	2916	2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe	88
PID 2916 wrote to memory of 1016	2916	2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe	88
PID 2916 wrote to memory of 1016	2916	2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-20_7e985b496d976150eed2ba13e3fe9c82_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1016

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
104KB

MD5
d271c512be57c8895a9f10cbe0091e78

SHA1
b49637ee789036c59ccb6aeaf9e508230e2cc5e8

SHA256
e8fbf0b83ba1b6d7fef51f33a95bbb7eb0c9e49d50cd67189ff39d3894ec794c

SHA512
ff99cd0b893538f34631d3edf2afc1d28d6aa4bb737016711a916e3344a02180027d35ab3b026ff5be2f861523a57cdd7aff7006b1045bb1f6a220209b7eda5e

Download Submit
memory/1016-19-0x0000000000670000-0x0000000000676000-memory.dmp

Filesize
24KB

Download
memory/1016-21-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/1016-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2916-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/2916-1-0x00000000007A0000-0x00000000007A6000-memory.dmp

Filesize
24KB

Download
memory/2916-2-0x00000000007A0000-0x00000000007A6000-memory.dmp

Filesize
24KB

Download
memory/2916-3-0x00000000007C0000-0x00000000007C6000-memory.dmp

Filesize
24KB

Download
memory/2916-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download