arrowrat | 8a572189d449be581188db033f77172d4f84649cdddaa81e8f00390e8e71a987

Analysis

max time kernel
151s
max time network
144s
platform
windows7_x64
resource
win7-20230220-en
resource tags

arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
submitted
04-05-2023 12:31

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General

Target

arrow/54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe
Size

361KB
MD5

8fa43d91b2fbf126d65bdb8520b57f79
SHA1

1de09d6a5f44169c6c0fe0290dbaca04d13789cc
SHA256

54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24
SHA512

63086eb0f61cbc8f240d332ab09342bf0abc449a2a6d94ba13ce4cfff62832eee7193aa71c3eaa0ea5edb260169c8aba4deade1db5dab0aae0c5d6f3f9dd0bf5
SSDEEP

6144:5bRq0OWdltyB7dWY0J6ddKwpgouYj8IbHCLb7tkm+RsMRBvc:m0OEltc7dyEv97jYfRk1mMRB

Score

10^/10

arrowrat company persistence rat

Malware Config

Extracted

Family

arrowrat

Botnet

company

103.178.236.127:1337

Mutex

pKfaPMMUE

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-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, C:\\Users\\Admin\\AppData\\Roaming\\HpmjJVGCM\\company"	MSBuild.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-1-5-21-1563773381-2037468142-1146002597-1000\Software\Microsoft\Active Setup\Installed Components	explorer.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2016 set thread context of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 1324 set thread context of 1500	1324	MSBuild.exe	29

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_Classes\Local Settings	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell	explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	explorer.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	explorer.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1324	MSBuild.exe
1324	MSBuild.exe
1324	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 17 IoCs

description	pid	Process
Token: SeDebugPrivilege	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe
Token: SeDebugPrivilege	1324	MSBuild.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: 33	1632	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1632	AUDIODG.EXE
Token: 33	1632	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1632	AUDIODG.EXE
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe
Token: SeShutdownPrivilege	1696	explorer.exe

Suspicious use of FindShellTrayWindow 27 IoCs

pid	Process
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe

Suspicious use of SendNotifyMessage 17 IoCs

pid	Process
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe
1696	explorer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1324	MSBuild.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 2016 wrote to memory of 1324	2016	54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe	27
PID 1324 wrote to memory of 1696	1324	MSBuild.exe	28
PID 1324 wrote to memory of 1696	1324	MSBuild.exe	28
PID 1324 wrote to memory of 1696	1324	MSBuild.exe	28
PID 1324 wrote to memory of 1696	1324	MSBuild.exe	28
PID 1324 wrote to memory of 564	1324	MSBuild.exe	30
PID 1324 wrote to memory of 564	1324	MSBuild.exe	30
PID 1324 wrote to memory of 564	1324	MSBuild.exe	30
PID 1324 wrote to memory of 564	1324	MSBuild.exe	30
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1324 wrote to memory of 1500	1324	MSBuild.exe	29
PID 1696 wrote to memory of 1284	1696	explorer.exe	31
PID 1696 wrote to memory of 1284	1696	explorer.exe	31
PID 1696 wrote to memory of 1284	1696	explorer.exe	31

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\arrow\54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe
"C:\Users\Admin\AppData\Local\Temp\arrow\54a0a1cf6b5fb30614ff4a2a7757cadf23fa539b4a352137dfc3292c6ceffa24.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2016
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.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:1324
- - 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:1696
  - - C:\Windows\system32\ctfmon.exe
      ctfmon.exe
      4⤵
      PID:1284
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" company 103.178.236.127 1337 pKfaPMMUE
    3⤵
    PID:1500
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" company 103.178.236.127 1337 pKfaPMMUE
    3⤵
    PID:564

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x520
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1632

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/1324-81-0x00000000009D0000-0x0000000000A10000-memory.dmp

Filesize
256KB

Download
memory/1324-56-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1324-84-0x00000000009D0000-0x0000000000A10000-memory.dmp

Filesize
256KB

Download
memory/1324-57-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1324-59-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1324-61-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1324-60-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1324-63-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1324-58-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1324-65-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/1500-70-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/1500-76-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-69-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-85-0x0000000004A60000-0x0000000004AA0000-memory.dmp

Filesize
256KB

Download
memory/1500-66-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-71-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-74-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-68-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-67-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1500-82-0x0000000004A60000-0x0000000004AA0000-memory.dmp

Filesize
256KB

Download
memory/1696-83-0x0000000003E90000-0x0000000003E91000-memory.dmp

Filesize
4KB

Download
memory/1696-86-0x0000000003E90000-0x0000000003E91000-memory.dmp

Filesize
4KB

Download
memory/1696-90-0x00000000027E0000-0x00000000027F0000-memory.dmp

Filesize
64KB

Download
memory/2016-54-0x0000000001250000-0x00000000012B0000-memory.dmp

Filesize
384KB

Download
memory/2016-55-0x0000000000580000-0x000000000059C000-memory.dmp

Filesize
112KB

Download