rhysida | 3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f

Analysis

max time kernel
94s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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
behavioral2/memory/4748-3372-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral2/memory/4748-3373-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida
behavioral2/memory/4748-3375-0x0000000000400000-0x0000000000478000-memory.dmp	family_rhysida

Rhysida
Rhysida is a ransomware that is written in C++ and discovered in 2023.
ransomware rhysida
Renames multiple (1720) 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
880	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
964	cmd.exe
2348	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
2348	cmd.exe
964	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-1-5-21-1194130065-3471212556-1656947724-1000\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
2856	cmd.exe
1436	cmd.exe
3656	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3656	PING.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
880	powershell.exe
880	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	880	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 4748 wrote to memory of 1480	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	90
PID 4748 wrote to memory of 1480	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	90
PID 1480 wrote to memory of 3144	1480	cmd.exe	92
PID 1480 wrote to memory of 3144	1480	cmd.exe	92
PID 3144 wrote to memory of 1452	3144	cmd.exe	93
PID 3144 wrote to memory of 1452	3144	cmd.exe	93
PID 4748 wrote to memory of 3664	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	94
PID 4748 wrote to memory of 3664	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	94
PID 3664 wrote to memory of 2232	3664	cmd.exe	96
PID 3664 wrote to memory of 2232	3664	cmd.exe	96
PID 2232 wrote to memory of 1760	2232	cmd.exe	97
PID 2232 wrote to memory of 1760	2232	cmd.exe	97
PID 4748 wrote to memory of 5028	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	98
PID 4748 wrote to memory of 5028	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	98
PID 5028 wrote to memory of 2012	5028	cmd.exe	100
PID 5028 wrote to memory of 2012	5028	cmd.exe	100
PID 2012 wrote to memory of 3768	2012	cmd.exe	101
PID 2012 wrote to memory of 3768	2012	cmd.exe	101
PID 4748 wrote to memory of 1504	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	102
PID 4748 wrote to memory of 1504	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	102
PID 1504 wrote to memory of 1736	1504	cmd.exe	104
PID 1504 wrote to memory of 1736	1504	cmd.exe	104
PID 1736 wrote to memory of 3264	1736	cmd.exe	105
PID 1736 wrote to memory of 3264	1736	cmd.exe	105
PID 4748 wrote to memory of 1096	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	106
PID 4748 wrote to memory of 1096	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	106
PID 1096 wrote to memory of 536	1096	cmd.exe	108
PID 1096 wrote to memory of 536	1096	cmd.exe	108
PID 536 wrote to memory of 5032	536	cmd.exe	109
PID 536 wrote to memory of 5032	536	cmd.exe	109
PID 4748 wrote to memory of 2380	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	110
PID 4748 wrote to memory of 2380	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	110
PID 2380 wrote to memory of 2220	2380	cmd.exe	112
PID 2380 wrote to memory of 2220	2380	cmd.exe	112
PID 2220 wrote to memory of 4720	2220	cmd.exe	113
PID 2220 wrote to memory of 4720	2220	cmd.exe	113
PID 4748 wrote to memory of 824	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	114
PID 4748 wrote to memory of 824	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	114
PID 824 wrote to memory of 3028	824	cmd.exe	116
PID 824 wrote to memory of 3028	824	cmd.exe	116
PID 3028 wrote to memory of 1872	3028	cmd.exe	117
PID 3028 wrote to memory of 1872	3028	cmd.exe	117
PID 4748 wrote to memory of 4708	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	118
PID 4748 wrote to memory of 4708	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	118
PID 4708 wrote to memory of 3520	4708	cmd.exe	120
PID 4708 wrote to memory of 3520	4708	cmd.exe	120
PID 3520 wrote to memory of 4732	3520	cmd.exe	121
PID 3520 wrote to memory of 4732	3520	cmd.exe	121
PID 4748 wrote to memory of 3544	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	122
PID 4748 wrote to memory of 3544	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	122
PID 3544 wrote to memory of 3092	3544	cmd.exe	124
PID 3544 wrote to memory of 3092	3544	cmd.exe	124
PID 4748 wrote to memory of 2348	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	125
PID 4748 wrote to memory of 2348	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	125
PID 2348 wrote to memory of 964	2348	cmd.exe	127
PID 2348 wrote to memory of 964	2348	cmd.exe	127
PID 964 wrote to memory of 880	964	cmd.exe	128
PID 964 wrote to memory of 880	964	cmd.exe	128
PID 4748 wrote to memory of 1436	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	129
PID 4748 wrote to memory of 1436	4748	3518195c256aa940c607f8534c91b5a9cd453c7417810de3cd4d262e2906d24f.exe	129
PID 1436 wrote to memory of 2856	1436	cmd.exe	132
PID 1436 wrote to memory of 2856	1436	cmd.exe	132
PID 2856 wrote to memory of 3656	2856	cmd.exe	133
PID 2856 wrote to memory of 3656	2856	cmd.exe	133

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:4748
- 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:1480
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3144
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Contol Panel\Desktop" /v Wallpaper /f
      4⤵
      PID:1452
- 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:3664
- - C:\Windows\system32\cmd.exe
    cmd.exe /c reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2232
  - - C:\Windows\system32\reg.exe
      reg delete "HKCU\Conttol Panel\Desktop" /v WallpaperStyle /f
      4⤵
      PID:1760
- 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:5028
- - 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:2012
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:3768
- 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:1504
- - 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:1736
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\ActiveDesktop" /v NoChangingWallPaper /t REG_SZ /d 1 /f
      4⤵
      PID:3264
- 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:1096
- - 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:536
  - - 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:5032
- 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:2380
- - 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:2220
  - - 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:4720
- 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:824
- - 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:3028
  - - C:\Windows\system32\reg.exe
      reg add "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:1872
- 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:4708
- - 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:3520
  - - C:\Windows\system32\reg.exe
      reg add "HKCU\Control Panel\Desktop" /v WallpaperStyle /t REG_SZ /d 2 /f
      4⤵
      PID:4732
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c rundll32.exe user32.dll,UpdatePerUserSystemParameters
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3544
- - C:\Windows\system32\rundll32.exe
    rundll32.exe user32.dll,UpdatePerUserSystemParameters
    3⤵
    PID:3092
- 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
  - Suspicious use of WriteProcessMemory
  PID:2348
- - 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
    - Suspicious use of WriteProcessMemory
    PID:964
  - - 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:880
    - - C:\Windows\system32\schtasks.exe
        
        "C:\Windows\system32\schtasks.exe" /delete /tn Rhsd /f
        5⤵
        
        PID:2908
- 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
  - Suspicious use of WriteProcessMemory
  PID:1436
- - C:\Windows\system32\cmd.exe
    cmd.exe /c start ping 127.0.0.1 -n 2
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:2856
  - - C:\Windows\system32\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:3656

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:\Users\Admin\AppData\CriticalBreachDetected.pdf

Filesize
35KB

MD5
38c9c6953f1fcb83b1e6e04825f3b4db

SHA1
5af8caf42b0ab98349c5806f5b22d4402a343de7

SHA256
dfd0bd7b4e4f84287ab4b19bb77d5308eb29e12e8724f04cb8c2fc6d4fb66d62

SHA512
6ba08b5ff206a5bb53c60e62dac872e6473aa419ffed5c09c1cdbb18f1dde7b2ec268df8abc3080fe484a4f0a32d8fec922f65e959f0dbd91fb8a4272e492ed1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jfygesw2.ly4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/880-3385-0x0000025D55CD0000-0x0000025D55CF2000-memory.dmp

Filesize
136KB

Download
memory/4748-3372-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4748-3373-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4748-3375-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download