netwire | 92c0d7be74bd55ea431d9f144b0938834c74764e87c39e8bcd640e05458c4adf

General

Target
01_file.exe
Size 61KB
Sample201117-e8lwszn5p2
SHA256 92c0d7be74bd55ea431d9f144b0938834c74764e87c39e8bcd640e05458c4adf
MD5 09f44613721448e9a45692a2f9bab7f7
SHA1 8f62c0683a552fef59136a7b7ae2a1f41e4d43cd
SHA512 611a0943c9112c0928d10037797d0e55acb51887c19a48fcf8982cd0aaed84e8cf35659cb22c1a9aef98b8ff9347e7c84d6894a5eda543be70c3fefcb9a704b2
MD5 SHA1 SHA512

Score

10^/10

netwire botnet evasion persistence rat stealer

Malware Config

Signatures

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-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\01_file.exe\""	01_file.exe

NetWire RAT payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/1120-6-0x0000000000400000-0x0000000000434000-memory.dmp	netwire
behavioral1/memory/1120-7-0x000000000040242D-mapping.dmp	netwire
behavioral1/memory/1120-8-0x0000000000400000-0x0000000000434000-memory.dmp	netwire

Netwire
Netwire is a RAT with main functionalities focused password stealing and keylogging, but also includes remote control capabilities as well.
botnet stealer netwire
Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	01_file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	01_file.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\01_file.exe	01_file.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\01_file.exe	01_file.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\01_file.exe"	01_file.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\01_file.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\01_file.exe"	01_file.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	01_file.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	01_file.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs

pid	Process
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1644 set thread context of 1120	1644	01_file.exe	32

Program crash 1 IoCs

pid	pid_target	Process	procid_target
964	1644	WerFault.exe	24

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1720	timeout.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1644	01_file.exe
1644	01_file.exe
1644	01_file.exe
964	WerFault.exe
964	WerFault.exe
964	WerFault.exe
964	WerFault.exe
964	WerFault.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1644	01_file.exe
Token: SeDebugPrivilege	964	WerFault.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1644 wrote to memory of 1720	1644	01_file.exe	29
PID 1644 wrote to memory of 1720	1644	01_file.exe	29
PID 1644 wrote to memory of 1720	1644	01_file.exe	29
PID 1644 wrote to memory of 1720	1644	01_file.exe	29
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 1120	1644	01_file.exe	32
PID 1644 wrote to memory of 964	1644	01_file.exe	33
PID 1644 wrote to memory of 964	1644	01_file.exe	33
PID 1644 wrote to memory of 964	1644	01_file.exe	33
PID 1644 wrote to memory of 964	1644	01_file.exe	33

C:\Users\Admin\AppData\Local\Temp\01_file.exe
"C:\Users\Admin\AppData\Local\Temp\01_file.exe"
1⤵
- Modifies WinLogon for persistence
- Checks BIOS information in registry
- Drops startup file
- Adds Run key to start application
- Maps connected drives based on registry
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1644
- C:\Windows\SysWOW64\timeout.exe
  timeout 5
  2⤵
  - Delays execution with timeout.exe
  PID:1720
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
  2⤵
  PID:1120
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1644 -s 1668
  2⤵
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:964