7be34d8af7ae5e4eee23bb429d0bb16e46545409139146781302f5e50239e8c6

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
23-02-2024 05:04

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General

Target

2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe
Size

35KB
MD5

de5e1c34fab11f7ec44bb8bd059bae91
SHA1

007486c86fb610cabd4f397892df7daab633c821
SHA256

7be34d8af7ae5e4eee23bb429d0bb16e46545409139146781302f5e50239e8c6
SHA512

03600ec3ddfb99c2013a6f1795bfef10e203a481d9ee429a79a36b68c4f67c427fc5291cba8f92079296361ef30f4d4e04e6ff421a5529ea02ee7c56c0557ced
SSDEEP

768:qUmnjFom/kLyMro2GtOOtEvwDpjeMLam5ax+j:qUmnpomddpMOtEvwDpjjaYai

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000300000001fc40-13.dat	CryptoLocker_rule2
behavioral2/memory/3920-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1148-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000300000001fc40-13.dat	CryptoLocker_set1
behavioral2/memory/3920-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1148-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/files/0x000300000001fc40-13.dat	UPX
behavioral2/memory/3920-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral2/memory/1148-26-0x0000000000500000-0x000000000050F000-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-1-5-21-3316742141-2240921845-2885234760-1000\Control Panel\International\Geo\Nation	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1148	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3920-0-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/files/0x000300000001fc40-13.dat	upx
behavioral2/memory/3920-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral2/memory/1148-26-0x0000000000500000-0x000000000050F000-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 3920 wrote to memory of 1148	3920	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	86
PID 3920 wrote to memory of 1148	3920	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	86
PID 3920 wrote to memory of 1148	3920	2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-23_de5e1c34fab11f7ec44bb8bd059bae91_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3920
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1148

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
35KB

MD5
e5902bbf7775166c2f39be5c29b7688b

SHA1
3b8ddb11fa3a791103568be3acd033a9353612f7

SHA256
5f7027c25787d4f81d66771c0938409c9ff65f586010389bce71ac88564acd5c

SHA512
912890a9e6c2d779334828c95bacc0d93dc01560827cd2011be65b0d3c553a4ad5242f84452810872d1196b10eff03b6092dc88d75ed504d90bdcdc8f7058070

Download Submit
memory/1148-19-0x0000000002110000-0x0000000002116000-memory.dmp

Filesize
24KB

Download
memory/1148-23-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

Filesize
24KB

Download
memory/1148-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3920-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/3920-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3920-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/3920-3-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/3920-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download