d3b9e693480b2d2483cde9c395f4834ba020a39b2801174b0edb34b18b6ff937

Analysis

max time kernel
148s
max time network
153s
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 02:22

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General

Target

2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe
Size

91KB
MD5

06018f2b5fe00b5ffe5b259add2a7a3c
SHA1

f3b31481c42af2974fdccf83a47ade306a988993
SHA256

d3b9e693480b2d2483cde9c395f4834ba020a39b2801174b0edb34b18b6ff937
SHA512

86ca04fe5edb7a74ffdbb0eb352dfab7895a3abbbf779d8aa3226c55827197f49cf610fa7bb07525cc5f6fba8bab0ad0fdc720bfef5c5ad9d4ee92a8893fd26e
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAA/D3:n6a+1SEOtEvwDpjYYvQd2P0

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1472-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1472-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1472-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1472 asih.exe

pid	process
1472	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1472-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe

description	pid	process	target process
PID 4180 wrote to memory of 1472	4180	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe
PID 4180 wrote to memory of 1472	4180	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe
PID 4180 wrote to memory of 1472	4180	2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_06018f2b5fe00b5ffe5b259add2a7a3c_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4180
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1472

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
91KB

MD5
3f6c5102841a397c93f2855d23be0fb0

SHA1
323528cbf4565f251724044e72d7c388bac6cf1d

SHA256
82032e743653f508425900413729051c378bdb60c7d3cd3431abf9926f24e502

SHA512
e8ecb423d488cb828d89734a6b3d4e8eafbaa0568d4c59baf83b8108070dcea55f016bf05627c9d0b4235ca3e5e6f3331957042bf2c01ed9c8dd1683453483ab

Download Submit
memory/1472-19-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/1472-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/1472-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4180-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4180-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4180-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/4180-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/4180-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download