rhysida | 258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
02-10-2024 09:31

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General

Target

258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe
Size

418KB
MD5

44c7d18633b5741db270a6bd378b6f3c
SHA1

c1d41db1662289870d9b0172c53612b8a346a0e3
SHA256

258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595
SHA512

008befc95068a9b50a785aa84b9d2c446344cadf097241de658c9a810b4659a82e1a8edfc8c641b9237f2253d4980fe6b0a2c861b6c7883a82349815d9a34a3d
SSDEEP

6144:SOoLbiZZB2FpUJISUgJBJWR7UGRMFDLkSAGAR1LhT:cy9Z4R7iLBJAR1

Score

10^/10

rhysida credential_access defense_evasion discovery execution ransomware spyware stealer

Malware Config

Signatures

Detect Rhysida ransomware 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/464-3510-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral2/memory/464-3511-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral2/memory/464-3513-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (1787) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

Processes:

powershell.exe

pid	Process
3728	powershell.exe

Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
credential_access stealer

Windows Credential Manager
T1555.004

Drops startup file 1 IoCs

Processes:

258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Word\STARTUP\CriticalBreachDetected.pdf	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Hide Artifacts: Hidden Window 1 TTPs 2 IoCs

Windows that would typically be displayed when an application carries out an operation can be hidden.

defense_evasion

Hidden Window

T1564.003

Processes:

cmd.execmd.exe

pid	Process
2316	cmd.exe
3412	cmd.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Public\\bg.jpg"	reg.exe

Hide Artifacts: Ignore Process Interrupts 1 TTPs 2 IoCs

Command interpreters often include specific commands/flags that ignore errors and other hangups.

defense_evasion

Ignore Process Interrupts

T1564.011

Processes:

cmd.execmd.exe

pid	Process
2316	cmd.exe
3412	cmd.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid	Process
3728	powershell.exe
3728	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description	pid	Process
Token: SeDebugPrivilege	3728	powershell.exe

Suspicious use of WriteProcessMemory 56 IoCs

Processes:

258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.execmd.exe

description	pid	Process	procid_target
PID 464 wrote to memory of 3812	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	90
PID 464 wrote to memory of 3812	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	90
PID 3812 wrote to memory of 2644	3812	cmd.exe	92
PID 3812 wrote to memory of 2644	3812	cmd.exe	92
PID 2644 wrote to memory of 4020	2644	cmd.exe	93
PID 2644 wrote to memory of 4020	2644	cmd.exe	93
PID 464 wrote to memory of 3952	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	94
PID 464 wrote to memory of 3952	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	94
PID 3952 wrote to memory of 4484	3952	cmd.exe	96
PID 3952 wrote to memory of 4484	3952	cmd.exe	96
PID 4484 wrote to memory of 5068	4484	cmd.exe	97
PID 4484 wrote to memory of 5068	4484	cmd.exe	97
PID 464 wrote to memory of 4488	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	98
PID 464 wrote to memory of 4488	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	98
PID 4488 wrote to memory of 3724	4488	cmd.exe	100
PID 4488 wrote to memory of 3724	4488	cmd.exe	100
PID 3724 wrote to memory of 2616	3724	cmd.exe	101
PID 3724 wrote to memory of 2616	3724	cmd.exe	101
PID 464 wrote to memory of 1564	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	102
PID 464 wrote to memory of 1564	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	102
PID 1564 wrote to memory of 812	1564	cmd.exe	104
PID 1564 wrote to memory of 812	1564	cmd.exe	104
PID 812 wrote to memory of 1760	812	cmd.exe	105
PID 812 wrote to memory of 1760	812	cmd.exe	105
PID 464 wrote to memory of 3392	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	106
PID 464 wrote to memory of 3392	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	106
PID 4348 wrote to memory of 4960	4348	cmd.exe	109
PID 4348 wrote to memory of 4960	4348	cmd.exe	109
PID 464 wrote to memory of 4524	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	110
PID 464 wrote to memory of 4524	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	110
PID 4524 wrote to memory of 3044	4524	cmd.exe	112
PID 4524 wrote to memory of 3044	4524	cmd.exe	112
PID 3044 wrote to memory of 3624	3044	cmd.exe	113
PID 3044 wrote to memory of 3624	3044	cmd.exe	113
PID 464 wrote to memory of 8	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	114
PID 464 wrote to memory of 8	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	114
PID 8 wrote to memory of 4864	8	cmd.exe	116
PID 8 wrote to memory of 4864	8	cmd.exe	116
PID 4864 wrote to memory of 4420	4864	cmd.exe	117
PID 4864 wrote to memory of 4420	4864	cmd.exe	117
PID 464 wrote to memory of 3840	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	118
PID 464 wrote to memory of 3840	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	118
PID 3840 wrote to memory of 3440	3840	cmd.exe	120
PID 3840 wrote to memory of 3440	3840	cmd.exe	120
PID 3440 wrote to memory of 392	3440	cmd.exe	121
PID 3440 wrote to memory of 392	3440	cmd.exe	121
PID 464 wrote to memory of 3168	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	122
PID 464 wrote to memory of 3168	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	122
PID 3168 wrote to memory of 2832	3168	cmd.exe	124
PID 3168 wrote to memory of 2832	3168	cmd.exe	124
PID 464 wrote to memory of 3412	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	125
PID 464 wrote to memory of 3412	464	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	125
PID 3412 wrote to memory of 2316	3412	cmd.exe	127
PID 3412 wrote to memory of 2316	3412	cmd.exe	127
PID 2316 wrote to memory of 3728	2316	cmd.exe	128
PID 2316 wrote to memory of 3728	2316	cmd.exe	128

C:\Users\Admin\AppData\Local\Temp\258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe
"C:\Users\Admin\AppData\Local\Temp\258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:464
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3812
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2644
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:4020
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3952
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4484
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:5068
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3724
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:2616
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:812
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:1760
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d "C:\Users\Public\bg.jpg" /f
  2⤵
  PID:3392
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d "C:\Users\Public\bg.jpg" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4348
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d "C:\Users\Public\bg.jpg" /f
      4⤵
      Sets desktop wallpaper using registry
      PID:4960
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v Wallpaper /t REG_SZ /d "C:\Users\Public\bg.jpg" /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4524
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v Wallpaper /t REG_SZ /d "C:\Users\Public\bg.jpg" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3044
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v Wallpaper /t REG_SZ /d "C:\Users\Public\bg.jpg" /f
      4⤵
      PID:3624
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:8
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4864
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:4420
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3840
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3440
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:392
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3168
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:2832
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c start powershell.exe -WindowStyle Hidden -Command Sleep -Milliseconds 500; Remove-Item -Force -Path "C:\Users\Admin\AppData\Local\Temp\C:\Users\Admin\AppData\Local\Temp\258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe" -ErrorAction SilentlyContinue;
  2⤵
  - Hide Artifacts: Hidden Window
  - Hide Artifacts: Ignore Process Interrupts
  - Suspicious use of WriteProcessMemory
  PID:3412
- - C:\Windows\system32\cmd.exe
    cmd.exe /c start powershell.exe -WindowStyle Hidden -Command Sleep -Milliseconds 500; Remove-Item -Force -Path "C:\Users\Admin\AppData\Local\Temp\C:\Users\Admin\AppData\Local\Temp\258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe" -ErrorAction SilentlyContinue;
    3⤵
    - Hide Artifacts: Hidden Window
    - Hide Artifacts: Ignore Process Interrupts
    - Suspicious use of WriteProcessMemory
    PID:2316
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -WindowStyle Hidden -Command Sleep -Milliseconds 500; Remove-Item -Force -Path "C:\Users\Admin\AppData\Local\Temp\C:\Users\Admin\AppData\Local\Temp\258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe" -ErrorAction SilentlyContinue;
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Window

T1564.003

Ignore Process Interrupts

T1564.011

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Windows Credential Manager

T1555.004

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

C:\Users\Admin\AppData\CriticalBreachDetected.pdf

Filesize
36KB

MD5
b0255953ca967ad08d514f93bcfaebd8

SHA1
1b19f60f698a9731f08e07f2f74fdb952adde675

SHA256
7a00a9f4ffd1b2149deacecf85f2e8da93468f8448383352ef6713ba062e6cc5

SHA512
def4f6824f46a973aa7f109a96e69517fdaab6abb2883f50fa6045a6e51b111b75be224185183127553dac2dbd1a39b6edaf67518b0bb6699880351705d86e87

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yjytd235.20c.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/464-3510-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/464-3511-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/464-3513-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3728-3523-0x00000164333E0000-0x0000016433402000-memory.dmp

Filesize
136KB

Download