055af481aeb794c83c962fa76d359f18e2c18f4a19aff45b1f2fb054f13d3555

Analysis

max time kernel
158s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
18-01-2024 23:27

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General

Target

2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe
Size

63KB
MD5

de5e1012516383e73ecca8d475442bd0
SHA1

88be10a4d63f8f59edb29468a3acdca8fbfd366e
SHA256

055af481aeb794c83c962fa76d359f18e2c18f4a19aff45b1f2fb054f13d3555
SHA512

cd255563fdf27a98148695ef333835a984d56be26566c69d152788e7ab0ee5ee8c5b12652f429537a491aca8444acdd97dd63c24aa36785d0fdf8a7c73984608
SSDEEP

1536:P8mnK6QFElP6n+gymddpMOtEvwDpjY6Uh:1nK6a+qdOOtEvwDpjs

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000600000002320e-13.dat	CryptoLocker_rule2
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2536-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000600000002320e-13.dat	CryptoLocker_set1
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1
behavioral2/memory/2536-26-0x0000000000500000-0x000000000050F311-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/files/0x000600000002320e-13.dat	UPX
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F311-memory.dmp	UPX
behavioral2/memory/2536-26-0x0000000000500000-0x000000000050F311-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-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation	2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2536	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4420-0-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/files/0x000600000002320e-13.dat	upx
behavioral2/memory/4420-17-0x0000000000500000-0x000000000050F311-memory.dmp	upx
behavioral2/memory/2536-26-0x0000000000500000-0x000000000050F311-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 4420 wrote to memory of 2536	4420	2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe	89
PID 4420 wrote to memory of 2536	4420	2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe	89
PID 4420 wrote to memory of 2536	4420	2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe	89

C:\Users\Admin\AppData\Local\Temp\2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-18_de5e1012516383e73ecca8d475442bd0_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4420
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2536

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
64KB

MD5
ce220a9bf0ed62c619eb6ebb446b13e3

SHA1
56a281c64bbc6ed3a2015857e84493818daf1bb7

SHA256
fe51c54c16de080ed0ec0157c02fdba013efbad698903f326e2fcf1c81469ade

SHA512
633e25cefa171bae3d55895df8b4396533d2cc44a88b6cd8823f78570b899c16188ae58746dc3c3bb00e299a75aaf72adb6b132071aee076c2f817ca8541b168

Download Submit
memory/2536-19-0x0000000002070000-0x0000000002076000-memory.dmp

Filesize
24KB

Download
memory/2536-21-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/2536-26-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4420-0-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download
memory/4420-1-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4420-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

Filesize
24KB

Download
memory/4420-3-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/4420-17-0x0000000000500000-0x000000000050F311-memory.dmp

Filesize
60KB

Download