rhysida | d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee

Analysis

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

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-10-2024 02:10

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General

Target

d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe
Size

417KB
MD5

1e256229b58061860be8dbf0dc4fe67e
SHA1

338d4f4ec714359d589918cee1adad12ef231907
SHA256

d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee
SHA512

7f53533d04e2b11bd98d92da91eb541f90239dba25d609d7f32c070a6003604a5e6a8ab75252a3db59e42a699b835eb580d95098ce72cc9c7a0e9ef75311f283
SSDEEP

6144:MmY7bSLzf+AZ0uAF+rJ267j0MCMF0oko84zgtdcZk+DoQPT:zgT67ko/r0t6K

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/2376-1392-0x0000000000400000-0x0000000000477000-memory.dmp	family_rhysida
behavioral1/memory/2376-1393-0x0000000000400000-0x0000000000477000-memory.dmp	family_rhysida
behavioral1/memory/2376-1395-0x0000000000400000-0x0000000000477000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (705) 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
2364	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	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.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
2648	cmd.exe
2752	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-1-5-21-1488793075-819845221-1497111674-1000\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
2648	cmd.exe
2752	cmd.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2364	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2364	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 1216	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	32
PID 2376 wrote to memory of 1216	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	32
PID 2376 wrote to memory of 1216	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	32
PID 1216 wrote to memory of 2308	1216	cmd.exe	34
PID 1216 wrote to memory of 2308	1216	cmd.exe	34
PID 1216 wrote to memory of 2308	1216	cmd.exe	34
PID 2308 wrote to memory of 1640	2308	cmd.exe	35
PID 2308 wrote to memory of 1640	2308	cmd.exe	35
PID 2308 wrote to memory of 1640	2308	cmd.exe	35
PID 2376 wrote to memory of 2248	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	36
PID 2376 wrote to memory of 2248	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	36
PID 2376 wrote to memory of 2248	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	36
PID 2248 wrote to memory of 1776	2248	cmd.exe	38
PID 2248 wrote to memory of 1776	2248	cmd.exe	38
PID 2248 wrote to memory of 1776	2248	cmd.exe	38
PID 1776 wrote to memory of 1648	1776	cmd.exe	39
PID 1776 wrote to memory of 1648	1776	cmd.exe	39
PID 1776 wrote to memory of 1648	1776	cmd.exe	39
PID 2376 wrote to memory of 2344	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	40
PID 2376 wrote to memory of 2344	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	40
PID 2376 wrote to memory of 2344	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	40
PID 2344 wrote to memory of 2252	2344	cmd.exe	42
PID 2344 wrote to memory of 2252	2344	cmd.exe	42
PID 2344 wrote to memory of 2252	2344	cmd.exe	42
PID 2252 wrote to memory of 2348	2252	cmd.exe	43
PID 2252 wrote to memory of 2348	2252	cmd.exe	43
PID 2252 wrote to memory of 2348	2252	cmd.exe	43
PID 2376 wrote to memory of 2772	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	44
PID 2376 wrote to memory of 2772	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	44
PID 2376 wrote to memory of 2772	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	44
PID 2772 wrote to memory of 1872	2772	cmd.exe	46
PID 2772 wrote to memory of 1872	2772	cmd.exe	46
PID 2772 wrote to memory of 1872	2772	cmd.exe	46
PID 1872 wrote to memory of 2900	1872	cmd.exe	47
PID 1872 wrote to memory of 2900	1872	cmd.exe	47
PID 1872 wrote to memory of 2900	1872	cmd.exe	47
PID 2376 wrote to memory of 1492	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	48
PID 2376 wrote to memory of 1492	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	48
PID 2376 wrote to memory of 1492	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	48
PID 1492 wrote to memory of 2728	1492	cmd.exe	50
PID 1492 wrote to memory of 2728	1492	cmd.exe	50
PID 1492 wrote to memory of 2728	1492	cmd.exe	50
PID 2728 wrote to memory of 2836	2728	cmd.exe	51
PID 2728 wrote to memory of 2836	2728	cmd.exe	51
PID 2728 wrote to memory of 2836	2728	cmd.exe	51
PID 2376 wrote to memory of 2676	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	52
PID 2376 wrote to memory of 2676	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	52
PID 2376 wrote to memory of 2676	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	52
PID 2676 wrote to memory of 2904	2676	cmd.exe	54
PID 2676 wrote to memory of 2904	2676	cmd.exe	54
PID 2676 wrote to memory of 2904	2676	cmd.exe	54
PID 2904 wrote to memory of 2592	2904	cmd.exe	55
PID 2904 wrote to memory of 2592	2904	cmd.exe	55
PID 2904 wrote to memory of 2592	2904	cmd.exe	55
PID 2376 wrote to memory of 2720	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	56
PID 2376 wrote to memory of 2720	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	56
PID 2376 wrote to memory of 2720	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	56
PID 2720 wrote to memory of 2860	2720	cmd.exe	58
PID 2720 wrote to memory of 2860	2720	cmd.exe	58
PID 2720 wrote to memory of 2860	2720	cmd.exe	58
PID 2860 wrote to memory of 2984	2860	cmd.exe	59
PID 2860 wrote to memory of 2984	2860	cmd.exe	59
PID 2860 wrote to memory of 2984	2860	cmd.exe	59
PID 2376 wrote to memory of 2888	2376	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	60

C:\Users\Admin\AppData\Local\Temp\d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe
"C:\Users\Admin\AppData\Local\Temp\d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:2376
- 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:1216
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2308
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:1640
- 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:2248
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1776
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:1648
- 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:2344
- - 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:2252
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:2348
- 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:2772
- - 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:1872
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:2900
- 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:1492
- - 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:2728
  - - 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:2836
- 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:2676
- - 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:2904
  - - 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:2592
- 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:2720
- - 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:2860
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2984
- 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:2888
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
    3⤵
    PID:2892
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2432
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  PID:2712
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:2704
- 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\d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe" -ErrorAction SilentlyContinue;
  2⤵
  - Hide Artifacts: Hidden Window
  - Hide Artifacts: Ignore Process Interrupts
  PID:2648
- - 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\d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe" -ErrorAction SilentlyContinue;
    3⤵
    - Hide Artifacts: Hidden Window
    - Hide Artifacts: Ignore Process Interrupts
    PID:2752
  - - 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\d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe" -ErrorAction SilentlyContinue;
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2364

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
35KB

MD5
7f015064e8527f3a403db58bace9ea7d

SHA1
328027f6e6b59025790d5de9bfd8c847c329946a

SHA256
c8d109877f3df54aa9962471b7253e803141e0acefca8d04f4fb16246ba57e08

SHA512
50ad4613ccb035fbc89197d38d1f028fd888d0053deb7f59489da9d584b2576dfb655835f063adc435a66356605c426461f62f834e98d1b209be197b71c1a4cf

Download Submit
memory/2364-1400-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2364-1401-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download
memory/2376-1392-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/2376-1393-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/2376-1395-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download