rhysida | 258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595

Analysis

max time kernel
23s
max time network
17s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
02-10-2024 10:31

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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

resource	yara_rule
behavioral1/memory/2380-1375-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral1/memory/2380-1376-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral1/memory/2380-1378-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (686) 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

pid	Process
2860	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

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

pid	Process
2904	cmd.exe
2428	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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1506706701-1246725540-2219210854-1000\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

pid	Process
2904	cmd.exe
2428	cmd.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2860	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2860	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2364	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	31
PID 2380 wrote to memory of 2364	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	31
PID 2380 wrote to memory of 2364	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	31
PID 2364 wrote to memory of 1140	2364	cmd.exe	33
PID 2364 wrote to memory of 1140	2364	cmd.exe	33
PID 2364 wrote to memory of 1140	2364	cmd.exe	33
PID 1140 wrote to memory of 1728	1140	cmd.exe	34
PID 1140 wrote to memory of 1728	1140	cmd.exe	34
PID 1140 wrote to memory of 1728	1140	cmd.exe	34
PID 2380 wrote to memory of 1740	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	35
PID 2380 wrote to memory of 1740	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	35
PID 2380 wrote to memory of 1740	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	35
PID 1740 wrote to memory of 1428	1740	cmd.exe	37
PID 1740 wrote to memory of 1428	1740	cmd.exe	37
PID 1740 wrote to memory of 1428	1740	cmd.exe	37
PID 1428 wrote to memory of 2060	1428	cmd.exe	38
PID 1428 wrote to memory of 2060	1428	cmd.exe	38
PID 1428 wrote to memory of 2060	1428	cmd.exe	38
PID 2380 wrote to memory of 2352	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	39
PID 2380 wrote to memory of 2352	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	39
PID 2380 wrote to memory of 2352	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	39
PID 2352 wrote to memory of 2672	2352	cmd.exe	41
PID 2352 wrote to memory of 2672	2352	cmd.exe	41
PID 2352 wrote to memory of 2672	2352	cmd.exe	41
PID 2672 wrote to memory of 2636	2672	cmd.exe	42
PID 2672 wrote to memory of 2636	2672	cmd.exe	42
PID 2672 wrote to memory of 2636	2672	cmd.exe	42
PID 2380 wrote to memory of 2320	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	43
PID 2380 wrote to memory of 2320	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	43
PID 2380 wrote to memory of 2320	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	43
PID 2320 wrote to memory of 1976	2320	cmd.exe	45
PID 2320 wrote to memory of 1976	2320	cmd.exe	45
PID 2320 wrote to memory of 1976	2320	cmd.exe	45
PID 1976 wrote to memory of 2500	1976	cmd.exe	46
PID 1976 wrote to memory of 2500	1976	cmd.exe	46
PID 1976 wrote to memory of 2500	1976	cmd.exe	46
PID 2380 wrote to memory of 2308	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	47
PID 2380 wrote to memory of 2308	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	47
PID 2380 wrote to memory of 2308	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	47
PID 2308 wrote to memory of 1996	2308	cmd.exe	49
PID 2308 wrote to memory of 1996	2308	cmd.exe	49
PID 2308 wrote to memory of 1996	2308	cmd.exe	49
PID 1996 wrote to memory of 1992	1996	cmd.exe	50
PID 1996 wrote to memory of 1992	1996	cmd.exe	50
PID 1996 wrote to memory of 1992	1996	cmd.exe	50
PID 2380 wrote to memory of 2012	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	51
PID 2380 wrote to memory of 2012	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	51
PID 2380 wrote to memory of 2012	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	51
PID 2012 wrote to memory of 640	2012	cmd.exe	53
PID 2012 wrote to memory of 640	2012	cmd.exe	53
PID 2012 wrote to memory of 640	2012	cmd.exe	53
PID 640 wrote to memory of 2276	640	cmd.exe	54
PID 640 wrote to memory of 2276	640	cmd.exe	54
PID 640 wrote to memory of 2276	640	cmd.exe	54
PID 2380 wrote to memory of 380	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	55
PID 2380 wrote to memory of 380	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	55
PID 2380 wrote to memory of 380	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	55
PID 380 wrote to memory of 1532	380	cmd.exe	57
PID 380 wrote to memory of 1532	380	cmd.exe	57
PID 380 wrote to memory of 1532	380	cmd.exe	57
PID 1532 wrote to memory of 2340	1532	cmd.exe	58
PID 1532 wrote to memory of 2340	1532	cmd.exe	58
PID 1532 wrote to memory of 2340	1532	cmd.exe	58
PID 2380 wrote to memory of 1600	2380	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	59

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:2380
- 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:2364
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1140
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:1728
- 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:1740
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1428
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:2060
- 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:2352
- - 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:2672
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:2636
- 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:2320
- - 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:1976
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:2500
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:2308
- - 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:1996
  - - 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:1992
- 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:2012
- - 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:640
  - - 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:2276
- 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:380
- - 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:1532
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2340
- 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⤵
  PID:1600
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
    3⤵
    PID:1588
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2348
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  PID:2448
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:2912
- 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
  PID:2904
- - 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
    PID:2428
  - - 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:2860

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

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Downloads

C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\CriticalBreachDetected.pdf

Filesize
36KB

MD5
b0255953ca967ad08d514f93bcfaebd8

SHA1
1b19f60f698a9731f08e07f2f74fdb952adde675

SHA256
7a00a9f4ffd1b2149deacecf85f2e8da93468f8448383352ef6713ba062e6cc5

SHA512
def4f6824f46a973aa7f109a96e69517fdaab6abb2883f50fa6045a6e51b111b75be224185183127553dac2dbd1a39b6edaf67518b0bb6699880351705d86e87

Download Submit
memory/2380-1375-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2380-1376-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2380-1378-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2860-1383-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2860-1384-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download