c7266d9f4a78f8871d9a56f7be6e9de591fe27c233e299836a43fa6b40b13c82

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
15/04/2024, 10:12

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General

Target

2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe
Size

36KB
MD5

c86e753ecd2712a2f05f6a6291278235
SHA1

64ca7fd4b10cee49ab9c334bc427a7b207a9bcd6
SHA256

c7266d9f4a78f8871d9a56f7be6e9de591fe27c233e299836a43fa6b40b13c82
SHA512

7b15efb19a4edc8c04e22b1621ec576b877369c1a5fc2a943fbe2c4724cdb08ac872415d48b56a7d65ef72e28119fa4a3528104257d2b400a9669bf6cbda942b
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5axKp:qUmnpomddpMOtEvwDpjjaYaq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_rule2
behavioral2/memory/4536-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3972-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001e9b1-13.dat	CryptoLocker_set1
behavioral2/memory/4536-16-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3972-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000300000001e9b1-13.dat	UPX
behavioral2/memory/4536-16-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/3972-26-0x0000000000500000-0x000000000050F000-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-1-5-21-4084619521-2220719027-1909462854-1000\Control Panel\International\Geo\Nation	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
3972	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4536-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000300000001e9b1-13.dat	upx
behavioral2/memory/4536-16-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/3972-26-0x0000000000500000-0x000000000050F000-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 4536 wrote to memory of 3972	4536	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	86
PID 4536 wrote to memory of 3972	4536	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	86
PID 4536 wrote to memory of 3972	4536	2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-15_c86e753ecd2712a2f05f6a6291278235_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:3972

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
dc2144aaa5074e8bf3b4d85458fba9f7

SHA1
fb482443786abaa98df00397ff62d1e99d061caf

SHA256
d7fc082939362020c19cd53fd691ba3ba5fd3cfca3e887b71db41e24d073b84c

SHA512
d8d8de36638cef50d6ac2d80a008bb4743bdfb0719db3c0aa4c36e3717cd9d210cad198fadd66fb7136091da45c64978b3732230c4391b0d47d87b3b447c7b35

Download Submit
memory/3972-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3972-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3972-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4536-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4536-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4536-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

Filesize
24KB

Download
memory/4536-3-0x00000000020E0000-0x00000000020E6000-memory.dmp

Filesize
24KB

Download
memory/4536-16-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download