rhysida | 3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
02/10/2024, 18:00

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General

Target

3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe
Size

421KB
MD5

2b825ea77e240d2ab6b6695a602cb07c
SHA1

ae6eb3cce06f666934e03dd46269526e56aff3b1
SHA256

3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f
SHA512

f2029aec439f4727e96436390027e100df521cd6557797a17d50f82335487b2a91ddc04dbd18fb8df96b3deea776ecf429321a55401b7739b1b4979b58db7e39
SSDEEP

6144:/u+2b7RNhPmrpQRF/2lfhOJoe7NzgMFgTkoQj6RgLaDMT:nGyRe7STng6KaD

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/2432-1318-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral1/memory/2432-1319-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral1/memory/2432-1326-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (647) 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
2636	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	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.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
2376	cmd.exe
952	cmd.exe

Indicator Removal: Clear Persistence 1 TTPs 2 IoCs

Clear artifacts associated with previously established persistence like scheduletasks on a host.

defense_evasion

Clear Persistence

T1070.009

pid	Process
2376	cmd.exe
952	cmd.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Public\\bg.jpg"	reg.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 3 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2380	PING.EXE
2284	cmd.exe
1760	cmd.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2380	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2636	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 2168	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	31
PID 2432 wrote to memory of 2168	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	31
PID 2432 wrote to memory of 2168	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	31
PID 2168 wrote to memory of 2256	2168	cmd.exe	33
PID 2168 wrote to memory of 2256	2168	cmd.exe	33
PID 2168 wrote to memory of 2256	2168	cmd.exe	33
PID 2256 wrote to memory of 2744	2256	cmd.exe	34
PID 2256 wrote to memory of 2744	2256	cmd.exe	34
PID 2256 wrote to memory of 2744	2256	cmd.exe	34
PID 2432 wrote to memory of 2036	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	35
PID 2432 wrote to memory of 2036	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	35
PID 2432 wrote to memory of 2036	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	35
PID 2036 wrote to memory of 2920	2036	cmd.exe	37
PID 2036 wrote to memory of 2920	2036	cmd.exe	37
PID 2036 wrote to memory of 2920	2036	cmd.exe	37
PID 2920 wrote to memory of 604	2920	cmd.exe	38
PID 2920 wrote to memory of 604	2920	cmd.exe	38
PID 2920 wrote to memory of 604	2920	cmd.exe	38
PID 2432 wrote to memory of 2040	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	39
PID 2432 wrote to memory of 2040	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	39
PID 2432 wrote to memory of 2040	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	39
PID 2040 wrote to memory of 3044	2040	cmd.exe	41
PID 2040 wrote to memory of 3044	2040	cmd.exe	41
PID 2040 wrote to memory of 3044	2040	cmd.exe	41
PID 3044 wrote to memory of 1548	3044	cmd.exe	42
PID 3044 wrote to memory of 1548	3044	cmd.exe	42
PID 3044 wrote to memory of 1548	3044	cmd.exe	42
PID 2432 wrote to memory of 1544	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	43
PID 2432 wrote to memory of 1544	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	43
PID 2432 wrote to memory of 1544	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	43
PID 1544 wrote to memory of 1576	1544	cmd.exe	45
PID 1544 wrote to memory of 1576	1544	cmd.exe	45
PID 1544 wrote to memory of 1576	1544	cmd.exe	45
PID 1576 wrote to memory of 3004	1576	cmd.exe	46
PID 1576 wrote to memory of 3004	1576	cmd.exe	46
PID 1576 wrote to memory of 3004	1576	cmd.exe	46
PID 2432 wrote to memory of 3012	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	47
PID 2432 wrote to memory of 3012	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	47
PID 2432 wrote to memory of 3012	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	47
PID 3012 wrote to memory of 1752	3012	cmd.exe	49
PID 3012 wrote to memory of 1752	3012	cmd.exe	49
PID 3012 wrote to memory of 1752	3012	cmd.exe	49
PID 1752 wrote to memory of 1264	1752	cmd.exe	50
PID 1752 wrote to memory of 1264	1752	cmd.exe	50
PID 1752 wrote to memory of 1264	1752	cmd.exe	50
PID 2432 wrote to memory of 1780	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	51
PID 2432 wrote to memory of 1780	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	51
PID 2432 wrote to memory of 1780	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	51
PID 1780 wrote to memory of 1360	1780	cmd.exe	53
PID 1780 wrote to memory of 1360	1780	cmd.exe	53
PID 1780 wrote to memory of 1360	1780	cmd.exe	53
PID 1360 wrote to memory of 2400	1360	cmd.exe	54
PID 1360 wrote to memory of 2400	1360	cmd.exe	54
PID 1360 wrote to memory of 2400	1360	cmd.exe	54
PID 2432 wrote to memory of 996	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	55
PID 2432 wrote to memory of 996	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	55
PID 2432 wrote to memory of 996	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	55
PID 996 wrote to memory of 1552	996	cmd.exe	57
PID 996 wrote to memory of 1552	996	cmd.exe	57
PID 996 wrote to memory of 1552	996	cmd.exe	57
PID 1552 wrote to memory of 956	1552	cmd.exe	58
PID 1552 wrote to memory of 956	1552	cmd.exe	58
PID 1552 wrote to memory of 956	1552	cmd.exe	58
PID 2432 wrote to memory of 1436	2432	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	59

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\3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe
"C:\Users\Admin\AppData\Local\Temp\3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:2432
- 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:2168
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2256
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:2744
- 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:2036
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2920
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:604
- 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:2040
- - 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:3044
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:1548
- 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:1544
- - 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:1576
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:3004
- 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:3012
- - 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:1752
  - - 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:1264
- 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:1780
- - 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:1360
  - - 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:2400
- 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:996
- - 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:1552
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:956
- 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:1436
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
    3⤵
    PID:1700
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2060
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  PID:1348
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:916
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c start powershell.exe -WindowStyle Hidden -Command "Sleep -Milliseconds 1000; schtasks /delete /tn Rhsd /f;"
  2⤵
  - Hide Artifacts: Hidden Window
  - Indicator Removal: Clear Persistence
  PID:2376
- - C:\Windows\system32\cmd.exe
    cmd.exe /c start powershell.exe -WindowStyle Hidden -Command "Sleep -Milliseconds 1000; schtasks /delete /tn Rhsd /f;"
    3⤵
    - Hide Artifacts: Hidden Window
    - Indicator Removal: Clear Persistence
    PID:952
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell.exe -WindowStyle Hidden -Command "Sleep -Milliseconds 1000; schtasks /delete /tn Rhsd /f;"
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2636
    - - C:\Windows\system32\schtasks.exe
        
        "C:\Windows\system32\schtasks.exe" /delete /tn Rhsd /f
        5⤵
        
        PID:2700
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c cmd.exe /c start ping 127.0.0.1 -n 2 > nul && del /f /q "C:\Users\Admin\AppData\Local\Temp\C:\Users\Admin\AppData\Local\Temp\3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe"
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  PID:2284
- - C:\Windows\system32\cmd.exe
    cmd.exe /c start ping 127.0.0.1 -n 2
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    PID:1760
  - - C:\Windows\system32\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2380

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

Indicator Removal

T1070

Clear Persistence

T1070.009

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

Query Registry

T1012

Remote System Discovery

T1018

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Defacement

T1491

Replay Monitor

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Downloads

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

Filesize
35KB

MD5
38c9c6953f1fcb83b1e6e04825f3b4db

SHA1
5af8caf42b0ab98349c5806f5b22d4402a343de7

SHA256
dfd0bd7b4e4f84287ab4b19bb77d5308eb29e12e8724f04cb8c2fc6d4fb66d62

SHA512
6ba08b5ff206a5bb53c60e62dac872e6473aa419ffed5c09c1cdbb18f1dde7b2ec268df8abc3080fe484a4f0a32d8fec922f65e959f0dbd91fb8a4272e492ed1

Download Submit
C:\Users\Public\bg.jpg

Filesize
385KB

MD5
b188f96fcfceeb9aa7a4f138bef1372d

SHA1
a0b6a8dd8bee9140261090a3b43771251fb49e2d

SHA256
ec84353bdf96f3bef53baad1e5ae03102e618cc60d6855dd505d7f59e18f407d

SHA512
2a67abf88bdb5b6d18127ee59163eeb797e0282f4d46b3c8583c1b9407b8e4a74fd6fdfe19ded0cc2810c4dc5a821df5b1345a24795a6f3f045124d9643f1fcd

Download Submit
memory/2432-1318-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2432-1319-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2432-1326-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2636-1327-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2636-1328-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download