rhysida | d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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
behavioral2/memory/4196-3387-0x0000000000400000-0x0000000000477000-memory.dmp	family_rhysida
behavioral2/memory/4196-3388-0x0000000000400000-0x0000000000477000-memory.dmp	family_rhysida
behavioral2/memory/4196-3390-0x0000000000400000-0x0000000000477000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (1738) 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
2972	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
4800	cmd.exe
4392	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-1-5-21-523280732-2327480845-3730041215-1000\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
4800	cmd.exe
4392	cmd.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2972	powershell.exe
2972	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2972	powershell.exe

Suspicious use of WriteProcessMemory 58 IoCs

description	pid	Process	procid_target
PID 4196 wrote to memory of 912	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	90
PID 4196 wrote to memory of 912	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	90
PID 912 wrote to memory of 3904	912	cmd.exe	92
PID 912 wrote to memory of 3904	912	cmd.exe	92
PID 3904 wrote to memory of 660	3904	cmd.exe	93
PID 3904 wrote to memory of 660	3904	cmd.exe	93
PID 4196 wrote to memory of 2716	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	94
PID 4196 wrote to memory of 2716	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	94
PID 2716 wrote to memory of 3156	2716	cmd.exe	96
PID 2716 wrote to memory of 3156	2716	cmd.exe	96
PID 3156 wrote to memory of 4684	3156	cmd.exe	97
PID 3156 wrote to memory of 4684	3156	cmd.exe	97
PID 4196 wrote to memory of 4516	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	98
PID 4196 wrote to memory of 4516	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	98
PID 4516 wrote to memory of 604	4516	cmd.exe	100
PID 4516 wrote to memory of 604	4516	cmd.exe	100
PID 604 wrote to memory of 1548	604	cmd.exe	101
PID 604 wrote to memory of 1548	604	cmd.exe	101
PID 4196 wrote to memory of 2792	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	102
PID 4196 wrote to memory of 2792	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	102
PID 2792 wrote to memory of 3988	2792	cmd.exe	104
PID 2792 wrote to memory of 3988	2792	cmd.exe	104
PID 3988 wrote to memory of 3024	3988	cmd.exe	105
PID 3988 wrote to memory of 3024	3988	cmd.exe	105
PID 4196 wrote to memory of 3572	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	106
PID 4196 wrote to memory of 3572	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	106
PID 3572 wrote to memory of 752	3572	cmd.exe	108
PID 3572 wrote to memory of 752	3572	cmd.exe	108
PID 752 wrote to memory of 4724	752	cmd.exe	109
PID 752 wrote to memory of 4724	752	cmd.exe	109
PID 4196 wrote to memory of 3444	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	110
PID 4196 wrote to memory of 3444	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	110
PID 3444 wrote to memory of 456	3444	cmd.exe	112
PID 3444 wrote to memory of 456	3444	cmd.exe	112
PID 456 wrote to memory of 4328	456	cmd.exe	113
PID 456 wrote to memory of 4328	456	cmd.exe	113
PID 4196 wrote to memory of 5052	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	114
PID 4196 wrote to memory of 5052	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	114
PID 5052 wrote to memory of 684	5052	cmd.exe	116
PID 5052 wrote to memory of 684	5052	cmd.exe	116
PID 684 wrote to memory of 2156	684	cmd.exe	117
PID 684 wrote to memory of 2156	684	cmd.exe	117
PID 4196 wrote to memory of 5024	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	118
PID 4196 wrote to memory of 5024	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	118
PID 5024 wrote to memory of 3552	5024	cmd.exe	120
PID 5024 wrote to memory of 3552	5024	cmd.exe	120
PID 3552 wrote to memory of 3868	3552	cmd.exe	121
PID 3552 wrote to memory of 3868	3552	cmd.exe	121
PID 4196 wrote to memory of 2008	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	122
PID 4196 wrote to memory of 2008	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	122
PID 2008 wrote to memory of 1716	2008	cmd.exe	124
PID 2008 wrote to memory of 1716	2008	cmd.exe	124
PID 4196 wrote to memory of 4800	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	125
PID 4196 wrote to memory of 4800	4196	d5c2f87033a5baeeb1b5b681f2c4a156ff1c05ccd1bfdaf6eae019fc4d5320ee.exe	125
PID 4800 wrote to memory of 4392	4800	cmd.exe	127
PID 4800 wrote to memory of 4392	4800	cmd.exe	127
PID 4392 wrote to memory of 2972	4392	cmd.exe	128
PID 4392 wrote to memory of 2972	4392	cmd.exe	128

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:4196
- 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:912
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3904
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:660
- 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:2716
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3156
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:4684
- 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:4516
- - 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:604
  - - 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:2792
- - 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:3988
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:3024
- 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:3572
- - 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:752
  - - 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:4724
- 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:3444
- - 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:456
  - - 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:4328
- 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:5052
- - 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:684
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:2156
- 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:5024
- - 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:3552
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:3868
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:1716
- 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
  - Suspicious use of WriteProcessMemory
  PID:4800
- - 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
    - Suspicious use of WriteProcessMemory
    PID:4392
  - - 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:2972

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
35KB

MD5
7f015064e8527f3a403db58bace9ea7d

SHA1
328027f6e6b59025790d5de9bfd8c847c329946a

SHA256
c8d109877f3df54aa9962471b7253e803141e0acefca8d04f4fb16246ba57e08

SHA512
50ad4613ccb035fbc89197d38d1f028fd888d0053deb7f59489da9d584b2576dfb655835f063adc435a66356605c426461f62f834e98d1b209be197b71c1a4cf

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_05llb5jl.4y5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2972-3396-0x0000029BE9C20000-0x0000029BE9C42000-memory.dmp

Filesize
136KB

Download
memory/4196-3387-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/4196-3388-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download
memory/4196-3390-0x0000000000400000-0x0000000000477000-memory.dmp

Filesize
476KB

Download