koiloader | ac5e09927cf29318eeb315cf02cd19992afcc151de228192d332bb83e034aaaf

Analysis

max time kernel
103s
max time network
134s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
09/04/2025, 08:00

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General

Target

20250407_KoiLoader_Samples/avourhtv.exe
Size

231KB
MD5

0b9e1fb8d5d72bde6fd0fe4c5a960f77
SHA1

5fb623c742fb303f65adec0441118d03b4726859
SHA256

843cf9f337afde0f32670eefe73952c8f27d86dc46a6a32c25080e86b0bb5d01
SHA512

0887c326ff2b3512908d0c5e49f1c7b5e4cb9212b804197d22ed6c6f20d8b8c274529c7dab45dd06666fe4ea14565e20e0c2fde54bcc11d05e07b6d0da8d2ae0
SSDEEP

3072:BNwCrquaP24/h7Q22oWvjWn+V4t4jrv34CovCWzG9f4BVfNMVzjJbU9Rvgb7SCv:/UhAoAZoLzJBVFMdjJI9RIaCv

Score

10^/10

koiloader discovery loader

Malware Config

Extracted

Family

koiloader

http://103.245.231.56/pentateuchal.php

Attributes

payload_url
https://rietiholidays.it/wp-content/uploads/2021/06

Signatures

KoiLoader
KoiLoader is a malware loader written in C++.
loader koiloader
Koiloader family
koiloader

Detects KoiLoader payload 1 IoCs

loader

resource	yara_rule
behavioral1/memory/408-0-0x0000000001290000-0x000000000129D000-memory.dmp	family_koi_loader

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	avourhtv.exe

C:\Users\Admin\AppData\Local\Temp\20250407_KoiLoader_Samples\avourhtv.exe
"C:\Users\Admin\AppData\Local\Temp\20250407_KoiLoader_Samples\avourhtv.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:408

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/408-0-0x0000000001290000-0x000000000129D000-memory.dmp

Filesize
52KB

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