rhysida | 258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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 discovery ransomware spyware stealer

Malware Config

Signatures

Detect Rhysida ransomware 3 IoCs

resource	yara_rule
behavioral1/memory/2536-1425-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral1/memory/2536-1426-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral1/memory/2536-1429-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (731) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware
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

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3533259084-2542256011-65585152-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Public\\bg.jpg"	reg.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2248	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	32
PID 2536 wrote to memory of 2248	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	32
PID 2536 wrote to memory of 2248	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	32
PID 2248 wrote to memory of 1768	2248	cmd.exe	34
PID 2248 wrote to memory of 1768	2248	cmd.exe	34
PID 2248 wrote to memory of 1768	2248	cmd.exe	34
PID 1768 wrote to memory of 1944	1768	cmd.exe	35
PID 1768 wrote to memory of 1944	1768	cmd.exe	35
PID 1768 wrote to memory of 1944	1768	cmd.exe	35
PID 2536 wrote to memory of 1824	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	36
PID 2536 wrote to memory of 1824	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	36
PID 2536 wrote to memory of 1824	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	36
PID 1824 wrote to memory of 2560	1824	cmd.exe	38
PID 1824 wrote to memory of 2560	1824	cmd.exe	38
PID 1824 wrote to memory of 2560	1824	cmd.exe	38
PID 2560 wrote to memory of 2524	2560	cmd.exe	39
PID 2560 wrote to memory of 2524	2560	cmd.exe	39
PID 2560 wrote to memory of 2524	2560	cmd.exe	39
PID 2536 wrote to memory of 2068	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	40
PID 2536 wrote to memory of 2068	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	40
PID 2536 wrote to memory of 2068	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	40
PID 2068 wrote to memory of 2692	2068	cmd.exe	42
PID 2068 wrote to memory of 2692	2068	cmd.exe	42
PID 2068 wrote to memory of 2692	2068	cmd.exe	42
PID 2692 wrote to memory of 2404	2692	cmd.exe	43
PID 2692 wrote to memory of 2404	2692	cmd.exe	43
PID 2692 wrote to memory of 2404	2692	cmd.exe	43
PID 2536 wrote to memory of 1788	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	44
PID 2536 wrote to memory of 1788	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	44
PID 2536 wrote to memory of 1788	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	44
PID 1788 wrote to memory of 2384	1788	cmd.exe	46
PID 1788 wrote to memory of 2384	1788	cmd.exe	46
PID 1788 wrote to memory of 2384	1788	cmd.exe	46
PID 2384 wrote to memory of 1680	2384	cmd.exe	47
PID 2384 wrote to memory of 1680	2384	cmd.exe	47
PID 2384 wrote to memory of 1680	2384	cmd.exe	47
PID 2536 wrote to memory of 2064	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	48
PID 2536 wrote to memory of 2064	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	48
PID 2536 wrote to memory of 2064	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	48
PID 2064 wrote to memory of 1576	2064	cmd.exe	50
PID 2064 wrote to memory of 1576	2064	cmd.exe	50
PID 2064 wrote to memory of 1576	2064	cmd.exe	50
PID 1576 wrote to memory of 1588	1576	cmd.exe	51
PID 1576 wrote to memory of 1588	1576	cmd.exe	51
PID 1576 wrote to memory of 1588	1576	cmd.exe	51
PID 2536 wrote to memory of 1684	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	52
PID 2536 wrote to memory of 1684	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	52
PID 2536 wrote to memory of 1684	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	52
PID 1684 wrote to memory of 2232	1684	cmd.exe	54
PID 1684 wrote to memory of 2232	1684	cmd.exe	54
PID 1684 wrote to memory of 2232	1684	cmd.exe	54
PID 2232 wrote to memory of 1580	2232	cmd.exe	55
PID 2232 wrote to memory of 1580	2232	cmd.exe	55
PID 2232 wrote to memory of 1580	2232	cmd.exe	55
PID 2536 wrote to memory of 588	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	56
PID 2536 wrote to memory of 588	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	56
PID 2536 wrote to memory of 588	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	56
PID 588 wrote to memory of 2740	588	cmd.exe	58
PID 588 wrote to memory of 2740	588	cmd.exe	58
PID 588 wrote to memory of 2740	588	cmd.exe	58
PID 2740 wrote to memory of 2760	2740	cmd.exe	59
PID 2740 wrote to memory of 2760	2740	cmd.exe	59
PID 2740 wrote to memory of 2760	2740	cmd.exe	59
PID 2536 wrote to memory of 2716	2536	258ddd78655ac0587f64d7146e52549115b67465302c0cbd15a0cba746f05595.exe	60

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:2536
- 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:2248
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1768
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:1944
- 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:1824
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2560
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:2524
- 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:2068
- - 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:2692
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:2404
- 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:1788
- - 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:2384
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:1680
- 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:2064
- - 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:1576
  - - 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:1588
- 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:1684
- - 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:2232
  - - 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:1580
- 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:588
- - 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:2740
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2760
- 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:2716
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
    3⤵
    PID:2824
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2764
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  PID:2872
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:2644

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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