3183b1e7499e7d78bde0597e8529ea3de9922d39205752594f3f119bfc695a4c

Analysis

max time kernel
148s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
03/02/2024, 06:35

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General

Target

2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe
Size

97KB
MD5

d436d42946ea751faef758dd9fa29628
SHA1

0642fbbdd07aad2bf8f9c9c623c0c3142df9001a
SHA256

3183b1e7499e7d78bde0597e8529ea3de9922d39205752594f3f119bfc695a4c
SHA512

6f3a634fc828785c7ea0d761e152b246338d8c8cdc1217b3a3f45188039f19c5d9a493db7e102d43bd05bd36592442f090655f457773be261386388a7c29870a
SSDEEP

1536:z6QFElP6n+gKmddpMOtEvwDpj3GYQbbr/B5/0:z6a+CdOOtEvwDpjcDc

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0010000000023153-13.dat	CryptoLocker_rule2
behavioral2/memory/976-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1188-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1188-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0010000000023153-13.dat	CryptoLocker_set1
behavioral2/memory/976-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1188-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1188-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0010000000023153-13.dat	UPX
behavioral2/memory/976-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1188-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1188-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1188	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0010000000023153-13.dat	upx
behavioral2/memory/976-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1188-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1188-27-0x0000000000500000-0x0000000000510000-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 976 wrote to memory of 1188	976	2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe	85
PID 976 wrote to memory of 1188	976	2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe	85
PID 976 wrote to memory of 1188	976	2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-03_d436d42946ea751faef758dd9fa29628_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:976
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1188

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
97KB

MD5
efbe724d6c9f6814fe5c4cb24dc75845

SHA1
472935ae6fed4022bcc430db528c985f64c6fb80

SHA256
88a3d3aae8751ce20a37993961f57efc19d9a3932cbd2fc167e440c2e3f63be8

SHA512
1269fee6c541caf312820f7573728d32261ab384412ccbb8e3c6159c7fe7c0960addd9b24e15a4a3adcbb1b7517e55dcd63d4ff9a61f51e7b87639233306221a

Download Submit
memory/976-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/976-1-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/976-2-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/976-3-0x00000000021B0000-0x00000000021B6000-memory.dmp

Filesize
24KB

Download
memory/976-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1188-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1188-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/1188-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/1188-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download