4f845bb9ede38150b16345687dd915f0f8a01b34d8d98208b85494ebc902683c

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 02:31

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General

Target

2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe
Size

53KB
MD5

69f988830aa93a9306b94756b32ca99f
SHA1

8e9f5c1e8550b7dcb6ec498fc083cb80fda34663
SHA256

4f845bb9ede38150b16345687dd915f0f8a01b34d8d98208b85494ebc902683c
SHA512

73a89882ba080bba868527f203c989444a9ab598323d181a6847b32e64a3f1cbdff5ff0b715f756fdbdf2a4da975d098a3e67cb7c178428f7ceea4bc771b361b
SSDEEP

768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTO4:z6QFElP6n+gKmddpMOtEvwDpj31i4

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/952-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1064-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/1064-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/952-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1064-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/1064-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/952-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1064-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/1064-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

1064 asih.exe

pid	process
1064	asih.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/952-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/952-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1064-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/1064-27-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe

description	pid	process	target process
PID 952 wrote to memory of 1064	952	2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe	asih.exe
PID 952 wrote to memory of 1064	952	2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe	asih.exe
PID 952 wrote to memory of 1064	952	2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_69f988830aa93a9306b94756b32ca99f_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:952
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1064

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
53KB

MD5
99ae4070c9b6ea758ed980eb5ba294f5

SHA1
b175ff1a9a227368f9c611b2e52635661151f6fc

SHA256
28fff6830a472562a20a599b817e5ca6a6381bede1d6c5547801844487783903

SHA512
e0a2743f825211df7b36cd973cfb12ec9db970ad8c6cede1cfd0472473a44dc6e1979f3fd11baa7c7ae05a4ec18d8e9eb54d7c3122b0987600c3325b08738659

Download Submit
memory/952-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/952-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/952-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/952-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/952-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1064-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1064-20-0x00000000007D0000-0x00000000007D6000-memory.dmp

Filesize
24KB

Download
memory/1064-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/1064-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download