arrowrat | cd15fbc9e839dbc2888b3e72c47827e09a8bc50038a509f138c266ebcf2f3ed6

Analysis

max time kernel
150s
max time network
138s
platform
windows7_x64
resource
win7-20230621-en
resource tags

arch:x64arch:x86image:win7-20230621-enlocale:en-usos:windows7-x64system
submitted
28-06-2023 14:23

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General

Target

file.exe
Size

457KB
MD5

288a04f04d9fc3e84ff5b2402c8050b1
SHA1

8e0b920bb33920e298ac9f73ab4b7ea0bbdfdbf2
SHA256

cd15fbc9e839dbc2888b3e72c47827e09a8bc50038a509f138c266ebcf2f3ed6
SHA512

928b111cfb151ad8967e1bde8e1e17ab592f0312f3883b1faf6578401b49cc741dde7ae426ee1ef7d8c985b3e4d4b287ccabaf01ea3841f8438d4dc993d9b5fb
SSDEEP

12288:QkoPbgRuF1R5u7w1eTe5XxLvZNOujzAKv546Q4dPHm:QkEb4E5u7w8Te5XxLhN9l54r4dHm

Score

10^/10

arrowrat client persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

Client

212.224.86.109:1337

Mutex

mTiBFWwWe

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

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Local\\DIirrnVVh\\WgQyIIgDg.exe"	jsc.exe

Modifies Installed Components in the registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1760 set thread context of 1700	1760	file.exe	30
PID 1700 set thread context of 524	1700	jsc.exe	32

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3465915139-4244146034-2076118314-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1760	file.exe
1760	file.exe
1700	jsc.exe
1700	jsc.exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeDebugPrivilege	1760	file.exe
Token: SeDebugPrivilege	1700	jsc.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: 33	1616	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1616	AUDIODG.EXE
Token: 33	1616	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1616	AUDIODG.EXE
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe
Token: SeShutdownPrivilege	1904	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

pid	Process
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe

Suspicious use of SendNotifyMessage 15 IoCs

pid	Process
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe
1904	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1700	jsc.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2004	1760	file.exe	28
PID 1760 wrote to memory of 2004	1760	file.exe	28
PID 1760 wrote to memory of 2004	1760	file.exe	28
PID 1760 wrote to memory of 1364	1760	file.exe	29
PID 1760 wrote to memory of 1364	1760	file.exe	29
PID 1760 wrote to memory of 1364	1760	file.exe	29
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1760 wrote to memory of 1700	1760	file.exe	30
PID 1700 wrote to memory of 1904	1700	jsc.exe	31
PID 1700 wrote to memory of 1904	1700	jsc.exe	31
PID 1700 wrote to memory of 1904	1700	jsc.exe	31
PID 1700 wrote to memory of 1904	1700	jsc.exe	31
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1700 wrote to memory of 524	1700	jsc.exe	32
PID 1904 wrote to memory of 860	1904	explorer.exe	34
PID 1904 wrote to memory of 860	1904	explorer.exe	34
PID 1904 wrote to memory of 860	1904	explorer.exe	34

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\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CasPol.exe"
  2⤵
  PID:2004
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe"
  2⤵
  PID:1364
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\jsc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\jsc.exe"
  2⤵
  - Modifies WinLogon for persistence
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1700
- - C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    3⤵
    - 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:1904
  - - C:\Windows\system32\ctfmon.exe
      ctfmon.exe
      4⤵
      PID:860
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Client 212.224.86.109 1337 mTiBFWwWe
    3⤵
    PID:524

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x570
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1616

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/524-71-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/524-73-0x00000000049B0000-0x00000000049F0000-memory.dmp

Filesize
256KB

Download
memory/524-66-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/524-65-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/524-64-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/524-61-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/524-62-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/524-63-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/524-68-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1700-56-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1700-58-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1700-72-0x0000000000CE0000-0x0000000000D20000-memory.dmp

Filesize
256KB

Download
memory/1700-60-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1760-54-0x0000000000EA0000-0x0000000000F16000-memory.dmp

Filesize
472KB

Download
memory/1760-55-0x000000001BE30000-0x000000001BEB0000-memory.dmp

Filesize
512KB

Download
memory/1904-83-0x0000000002640000-0x0000000002650000-memory.dmp

Filesize
64KB

Download
memory/1904-78-0x0000000003C60000-0x0000000003C61000-memory.dmp

Filesize
4KB

Download
memory/1904-79-0x0000000003C60000-0x0000000003C61000-memory.dmp

Filesize
4KB

Download