ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbc

Analysis

max time kernel
115s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
30-09-2024 00:56

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General

Target

ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Size

412KB
MD5

fa34f1060890c39f4a3a660188d3b7b0
SHA1

4ee63732b0507164776899842f0d1cd5f4efd6c4
SHA256

ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbc
SHA512

0e7cd9d60b57ce22cb86b7166e59ab14c412529e1405f366687b7b20c8931d734923e5fd47cbf4f1ebc11dec37d5682781655de95087b1d140d9dfdda9c3dbfe
SSDEEP

6144:HkggvLlERJqQtjHFsdWAYzblGLmiCxrrPiujhQ37WCSxh:EggTl+IQtTmdrYzblGLmiCQujhu7W

Score

10^/10

bootkit discovery evasion persistence privilege_escalation

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe

Adds policy Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Key created	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe

Modifies Windows Firewall 2 TTPs 1 IoCs

evasion

Windows Service

T1543.003

Disable or Modify System Firewall

T1562.004

pid	Process
2012	netsh.exe

Executes dropped EXE 3 IoCs

pid	Process
3272	csrss.exe
1260	csrss.exe
2280	csrss.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\csrss = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\csrss.exe"	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
File opened for modification	\??\PhysicalDrive0	csrss.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1592 set thread context of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 2284 set thread context of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 3272 set thread context of 1260	3272	csrss.exe	98
PID 1260 set thread context of 2280	1260	csrss.exe	99

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

persistence privilege_escalation

Netsh Helper DLL

T1546.007

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	netsh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe

System Time Discovery 1 TTPs 1 IoCs

Adversary may gather the system time and/or time zone settings from a local or remote system.

discovery

System Time Discovery

T1124

pid	Process
2012	netsh.exe

Suspicious use of SetWindowsHookEx 6 IoCs

pid	Process
1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
3272	csrss.exe
1260	csrss.exe
2280	csrss.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 1592 wrote to memory of 2284	1592	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	88
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2284 wrote to memory of 2216	2284	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	89
PID 2216 wrote to memory of 2012	2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	90
PID 2216 wrote to memory of 2012	2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	90
PID 2216 wrote to memory of 2012	2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	90
PID 2216 wrote to memory of 3272	2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	92
PID 2216 wrote to memory of 3272	2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	92
PID 2216 wrote to memory of 3272	2216	ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe	92
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 3272 wrote to memory of 1260	3272	csrss.exe	98
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99
PID 1260 wrote to memory of 2280	1260	csrss.exe	99

C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
"C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1592
- C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
  "C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2284
- - C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
    "C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2216
  - - C:\Windows\SysWOW64\netsh.exe
      netsh advfirewall firewall add rule name="Nero" dir=in action=allow description="Multimedia suite" program="C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe" enable=yes
      4⤵
      Modifies Windows Firewall
      Event Triggered Execution: Netsh Helper DLL
      System Location Discovery: System Language Discovery
      System Time Discovery
      PID:2012
  - - C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
      C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3272
    - - C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
        
        C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
        5⤵
        Executes dropped EXE
        Writes to the Master Boot Record (MBR)
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1260
      - C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe
        
        C:\Users\Admin\AppData\Local\Temp\ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbcN.exe
        6⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2280

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

T1562.004

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

System Time Discovery

T1124

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\csrss.exe

Filesize
412KB

MD5
fa34f1060890c39f4a3a660188d3b7b0

SHA1
4ee63732b0507164776899842f0d1cd5f4efd6c4

SHA256
ffc5d2ee9e92d3a08c779193aeb9716012d390600bc876e45a8ed71bdb805dbc

SHA512
0e7cd9d60b57ce22cb86b7166e59ab14c412529e1405f366687b7b20c8931d734923e5fd47cbf4f1ebc11dec37d5682781655de95087b1d140d9dfdda9c3dbfe

Download Submit
memory/1260-28-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1260-50-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2216-7-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2216-9-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2216-24-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2280-33-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2280-48-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/2284-2-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2284-4-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/2284-12-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads