5343cf7952374e0c403d3d76a04a1d1e5c0e14d6b625066bdc0e32d442fd12b4

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240221-en
resource tags

arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system
submitted
21-02-2024 16:59

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General

Target

2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe
Size

89KB
MD5

fba82484b448b54aa4cad32018a7d476
SHA1

3a30ff2058d8630ffa37c687822cd618d240f62b
SHA256

5343cf7952374e0c403d3d76a04a1d1e5c0e14d6b625066bdc0e32d442fd12b4
SHA512

167b8ce9d2e572d26cc6744d1eeeb22f7a3929bb33b448081a543f382b30b5d3507b615ce6c8cdc6a712b43d03b578c38b1581856b45013d913b57a5228790b4
SSDEEP

1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwMg1v:AnBdOOtEvwDpj6z5

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000c000000022720-13.dat	CryptoLocker_rule2
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4200-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000c000000022720-13.dat	CryptoLocker_set1
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4200-25-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000c000000022720-13.dat	UPX
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/4200-25-0x0000000000500000-0x000000000050F000-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-1-5-21-1392040655-2056082574-619088944-1000\Control Panel\International\Geo\Nation	2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4200	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000c000000022720-13.dat	upx
behavioral2/memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/4200-25-0x0000000000500000-0x000000000050F000-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 3944 wrote to memory of 4200	3944	2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe	85
PID 3944 wrote to memory of 4200	3944	2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe	85
PID 3944 wrote to memory of 4200	3944	2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-21_fba82484b448b54aa4cad32018a7d476_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3944
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4200

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
c38990723ca65f1632ed89bac0b6e75a

SHA1
d497dc0d86cb19ae70f086df1c1b95bec55b076c

SHA256
1e2d1749f04acf2a9872784d1cf071c8630a69c6807b99b6b67ba04354494f62

SHA512
6d45ce4f90c00f5610fa828c9d1ca08e8ea963aa8562dcd266b9935ec51f376ddec3a05e9fb2f7e0da67ffeb27d5b480fe95f0eb4678d73d86af61413d314cc4

Download Submit
memory/3944-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3944-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3944-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3944-3-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/3944-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4200-19-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4200-25-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download