netwire | 482a6a0bf95d313de664dec7523d7487995d5f26e1a30b8bc62c0a5e1431fbd7

General

Target
02_file.exe
Size 2.0MB
Sample201104-yavfxphfrx
SHA256 482a6a0bf95d313de664dec7523d7487995d5f26e1a30b8bc62c0a5e1431fbd7
MD5 9c0973c401f84fdbf24404a4cc2cf812
SHA1 b15bdd7623c1bdd0713be7597930b48c81b85aae
SHA512 fffced9b909cd0ac1f21493c2486c528f09930ae8d83aa25b784e9534172cde5ba3fdec78a6e674ba3134a1d66830d05028dd8c2006074d3b6a2f492f6f2e401
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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\02_file.exe\""	02_file.exe

NetWire RAT payload 3 IoCs

rat

resource	yara_rule
behavioral1/memory/1760-5-0x000000000040242D-mapping.dmp	netwire
behavioral1/memory/1760-4-0x0000000000400000-0x0000000000434000-memory.dmp	netwire
behavioral1/memory/1760-6-0x0000000000400000-0x0000000000434000-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	02_file.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	02_file.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\02_file.exe	02_file.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\02_file.exe	02_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-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\02_file.exe"	02_file.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Windows\CurrentVersion\Run\02_file.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\02_file.exe"	02_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	02_file.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	02_file.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 8 IoCs

pid	Process
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1852 set thread context of 1760	1852	02_file.exe	30

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1684	1852	WerFault.exe	24

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1852	02_file.exe
1852	02_file.exe
1852	02_file.exe
1684	WerFault.exe
1684	WerFault.exe
1684	WerFault.exe
1684	WerFault.exe
1684	WerFault.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	02_file.exe
Token: SeDebugPrivilege	1684	WerFault.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1760	1852	02_file.exe	30
PID 1852 wrote to memory of 1684	1852	02_file.exe	31
PID 1852 wrote to memory of 1684	1852	02_file.exe	31
PID 1852 wrote to memory of 1684	1852	02_file.exe	31
PID 1852 wrote to memory of 1684	1852	02_file.exe	31

C:\Users\Admin\AppData\Local\Temp\02_file.exe
"C:\Users\Admin\AppData\Local\Temp\02_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:1852
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe"
  2⤵
  PID:1760
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1852 -s 808
  2⤵
  - Program crash
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1684