750f62429b8923a69894941e532ac0c9d3b44afc6b9d5271171d0d8b08920af7

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
21/04/2024, 04:29

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General

Target

2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe
Size

89KB
MD5

24d193b97da1bd4cb905a642088c8afa
SHA1

af1935faf4a7ea8998592cca69f068c4154b1b78
SHA256

750f62429b8923a69894941e532ac0c9d3b44afc6b9d5271171d0d8b08920af7
SHA512

9800807b9c9926ea5dfaf26c83194af77c17281975acadf064b7f78d1dda93a1fe59e88ebe39a9321b0d9c7cb4e8c52cab05751505898d7bac3380e08c48d62a
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAAy:n6a+1SEOtEvwDpjYYvQd2Px

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4568-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_rule2
behavioral2/memory/4568-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4568-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e97a-13.dat	CryptoLocker_set1
behavioral2/memory/4568-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3732-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4568-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000300000001e97a-13.dat	UPX
behavioral2/memory/4568-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3732-26-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation	2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3732	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4568-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000300000001e97a-13.dat	upx
behavioral2/memory/4568-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3732-26-0x0000000000500000-0x0000000000510000-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 4568 wrote to memory of 3732	4568	2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe	85
PID 4568 wrote to memory of 3732	4568	2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe	85
PID 4568 wrote to memory of 3732	4568	2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_24d193b97da1bd4cb905a642088c8afa_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3732

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
89KB

MD5
312680ccf14061fb2980bf193aefcdda

SHA1
93dada4b842b60b904b6938c3074951b2a7ab6da

SHA256
7d47190dc0293257de3099ac856219855a1ea5b21ff85cff59900edd4e8045a2

SHA512
57fd30936e6a3714eacddf99bc3ea46fc9af009b4b7f19f4912848f3b77ca5a915659535ec74e55fd00fc293caed9ad7b64ffb85d5293f596b81492ea38160f3

Download Submit
memory/3732-19-0x0000000000690000-0x0000000000696000-memory.dmp

Filesize
24KB

Download
memory/3732-21-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/3732-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4568-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4568-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4568-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/4568-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/4568-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download