ratonrat | 5760552963c066ee4c433ab2d8468286afb83f082ed44bcc81e4d8d70f13ff7f

Analysis

max time kernel
150s
max time network
153s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
05/08/2026, 15:01

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General

Target
LynxFyxPayload.exe
Size 594KB
Sample260805-sd947avvft
SHA256 5760552963c066ee4c433ab2d8468286afb83f082ed44bcc81e4d8d70f13ff7f
MD5 366861670ec7a2cd0ecff16d9208075e
SHA1 e9e4ec447f4738293a6cb75506d0aaf61f0d5332
SHA512 017e4cf3803f66e92e0bc43bbfbeca66738a5df86988d9c3f7723db7f64fa80d9b8b68a79bff0e09122ed3a886e7e7558e29287a66a4bec360ef4cbdfe870a10
SSDEEP 12288:3Y1R3374rIkzE7tnXknXQaBFJi4RkTAJ0MK86WoLb66OPfD9piIlBk:gL4kkA7lXkXDDuAOFhWSApip
TLSH
T1EBD40204B7FC3616FBFE8B3E59F091480EB2B2538A20D25C5D83D4A91675B429D24FA7
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

costura defense_evasion execution ratonrat packer persistence stealer

Malware Config

Extracted

Family

ratonrat

Version

Free

196.115.30.47:8080

Mutex

oIJvCFDwksR1PyKD6JJrwn3

Attributes

assist
false
box
true
box_icon
Error
box_msg
LynxFyx is missing DLL files AuditEdit.dll, OriginEscalate.dll and couldn't Load Properly
box_title
LynxFyx Has encountered a fatal error and exited
defender
true
delay
0
hide_file
true
open_website
false
process_critical
true
raw
silly21
reconnect
3
startup
true
tag
Infected
uac
false
vm
true
website
https://t.me/sillyisafed

Signatures

Family: RatonRAT
RatonRAT is an information stealer written in C#.
stealer ratonrat

Detects RatonRAT payload 2 IoCs

resource	yara_rule
behavioral2/memory/4236-1-0x0000022AB69A0000-0x0000022AB6A3A000-memory.dmp	family_ratonrat
behavioral2/files/0x000e00000001c545-9.dat	family_ratonrat

Executes dropped EXE 2 IoCs

pid	Process
6136	LynxFyxPayload.exe
5308	LynxFyxPayload.exe

Costura .NET executable packer 1 IoCs

Costura packer aka Costura Fody, is an add-in for the .NET framework that embeds all external dependency .dll files as resources inside main executable.

costura packer

resource	yara_rule
behavioral2/files/0x000e00000001c545-9.dat	costura

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3324	cmd.exe

Delays execution with timeout.exe 2 IoCs

defense_evasion

pid	Process
4196	timeout.exe
2512	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2388	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	6136	LynxFyxPayload.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 3324	4236	LynxFyxPayload.exe	89
PID 3324 wrote to memory of 5820	3324	cmd.exe	91
PID 3324 wrote to memory of 4196	3324	cmd.exe	92
PID 3324 wrote to memory of 6136	3324	cmd.exe	93
PID 3324 wrote to memory of 2512	3324	cmd.exe	94
PID 6136 wrote to memory of 2388	6136	LynxFyxPayload.exe	95

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\LynxFyxPayload.exe
"C:\Users\Admin\AppData\Local\Temp\LynxFyxPayload.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\Temp\cleanup_ge0PymP1wKom4vKpMFOnwGJ4AnI8hU.bat""
  2⤵
  - Executes a command shell one-liner
  - Suspicious use of WriteProcessMemory
  PID:3324
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:5820
- - C:\Windows\system32\timeout.exe
    timeout /t 2 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:4196
- - C:\Users\Admin\AppData\Roaming\PlatformRuntime\LynxFyxPayload.exe
    "C:\Users\Admin\AppData\Roaming\PlatformRuntime\LynxFyxPayload.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:6136
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "LynxFyxPayload" /sc ONLOGON /tr "\"C:\Users\Admin\AppData\Roaming\PlatformRuntime\LynxFyxPayload.exe\"" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2388
- - C:\Windows\system32\timeout.exe
    timeout /t 1 /nobreak
    3⤵
    - Delays execution with timeout.exe
    PID:2512

C:\Users\Admin\AppData\Roaming\PlatformRuntime\LynxFyxPayload.exe
"C:\Users\Admin\AppData\Roaming\PlatformRuntime\LynxFyxPayload.exe"
1⤵
- Executes dropped EXE
PID:5308

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

LynxFyxPayload.exe

Path C:\Users\Admin\AppData\Roaming\PlatformRuntime\LynxFyxPayload.exe
Size 594KB
SHA256 5760552963c066ee4c433ab2d8468286afb83f082ed44bcc81e4d8d70f13ff7f
MD5 366861670ec7a2cd0ecff16d9208075e
SHA1 e9e4ec447f4738293a6cb75506d0aaf61f0d5332
SHA512 017e4cf3803f66e92e0bc43bbfbeca66738a5df86988d9c3f7723db7f64fa80d9b8b68a79bff0e09122ed3a886e7e7558e29287a66a4bec360ef4cbdfe870a10
SSDEEP 12288:3Y1R3374rIkzE7tnXknXQaBFJi4RkTAJ0MK86WoLb66OPfD9piIlBk:gL4kkA7lXkXDDuAOFhWSApip
TLSH
T1EBD40204B7FC3616FBFE8B3E59F091480EB2B2538A20D25C5D83D4A91675B429D24FA7
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

cleanup_ge0PymP1wKom4vKpMFOnwGJ4AnI8hU.bat

Path C:\Users\Admin\AppData\Roaming\Temp\cleanup_ge0PymP1wKom4vKpMFOnwGJ4AnI8hU.bat
Size 558B
SHA256 0082da9ccb9f824709d6c1023387c1531078263de738ee6d03fd4cebcb669b44
MD5 01fa682ab2a5d02c64791d82ca095658
SHA1 053b028866c3019d5e44b0c7d9a459d9ec15d477
SHA512 82d8c99554ac35d97515be5da594c19dcf5a33e1ae747aaec22584711e8cc35d770bc419b04eee144f86b0f2cc91ff86d5b7815a44e4798f3be1511edd87ea0d
TLSH
T1BFF0F60162CE831C182464BF0EA6B18DD0D5489F7F8575613B90C55A979241BB5D77E1
MD5 SHA1 SHA512 TLSH

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memory/4236-8-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/4236-3-0x0000022AB6EB0000-0x0000022AB6EBA000-memory.dmp

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memory/4236-6-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/4236-2-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/4236-0-0x00007FFA5146F000-0x00007FFA51470000-memory.dmp

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memory/4236-1-0x0000022AB69A0000-0x0000022AB6A3A000-memory.dmp

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memory/6136-10-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/6136-11-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/6136-12-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/6136-13-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/6136-14-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/6136-15-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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memory/6136-17-0x00007FFA512E0000-0x00007FFA51C84000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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