d227ca351c50b4bea00c53989ec882a75238fc7d03bb9991c798c623a34e41f9

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06-04-2024 01:01

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General

Target

2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe
Size

36KB
MD5

dad8483e5dfa5561ca72a97990d5055f
SHA1

35b4c251939b8a1dd4da1e7209acebeb66e9c4d5
SHA256

d227ca351c50b4bea00c53989ec882a75238fc7d03bb9991c798c623a34e41f9
SHA512

5451ef3c0acde52d48e0ad4e8f419ce99faf53f06871e8a0d4c922ed629f02e6fc960de54ad2cdabccbedf679a1c2b47a135dcb65a658a132100e706843fc85c
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITf:qDdFJy3QMOtEvwDpjjWMl7Tf

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002321c-13.dat	CryptoLocker_rule2
behavioral2/memory/2748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002321c-13.dat	CryptoLocker_set1
behavioral2/memory/2748-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3120-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002321c-13.dat	UPX
behavioral2/memory/2748-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3120-26-0x0000000000500000-0x0000000000510000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation	2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3120	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002321c-13.dat	upx
behavioral2/memory/2748-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3120-26-0x0000000000500000-0x0000000000510000-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 2748 wrote to memory of 3120	2748	2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe	88
PID 2748 wrote to memory of 3120	2748	2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe	88
PID 2748 wrote to memory of 3120	2748	2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-06_dad8483e5dfa5561ca72a97990d5055f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3120

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
36KB

MD5
b08e7069762c45d603f7291b08e77f27

SHA1
e01e893bbdf0a7c211a30fae12beed55efac1946

SHA256
fe1775a51fb2c35289637cc7b5f7d5ec94c57a2e222792ae61b84ee8fcd35d76

SHA512
7f90c141fdfa24ddd8407c858aa0ac6643e087066712ed38f2e64026947eea8da22932cddf580266bfbc7ec53b171e358a7cb5fb31e704c912a135f7e0af630b

Download Submit
memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2748-1-0x0000000002280000-0x0000000002286000-memory.dmp

Filesize
24KB

Download
memory/2748-2-0x0000000002280000-0x0000000002286000-memory.dmp

Filesize
24KB

Download
memory/2748-3-0x0000000002180000-0x0000000002186000-memory.dmp

Filesize
24KB

Download
memory/2748-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3120-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3120-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3120-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download