Malware Analysis Report

2025-01-18 12:39

Sample ID 240403-byxwxsbh81
Target 8e0cab6e15c8ecf53d170b396a5cdb6db74f1a8cc5bfd408ef5d480f25fa358c.r01
SHA256 8e0cab6e15c8ecf53d170b396a5cdb6db74f1a8cc5bfd408ef5d480f25fa358c
Tags
formbook ns03 rat spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

8e0cab6e15c8ecf53d170b396a5cdb6db74f1a8cc5bfd408ef5d480f25fa358c

Threat Level: Known bad

The file 8e0cab6e15c8ecf53d170b396a5cdb6db74f1a8cc5bfd408ef5d480f25fa358c.r01 was found to be: Known bad.

Malicious Activity Summary

formbook ns03 rat spyware stealer trojan

Formbook

Formbook payload

Detects executables packed with SmartAssembly

Deletes itself

Suspicious use of SetThreadContext

Suspicious use of WriteProcessMemory

Gathers network information

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of UnmapMainImage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-03 01:33

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-03 01:33

Reported

2024-04-03 01:36

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

150s

Command Line

C:\Windows\Explorer.EXE

Signatures

Formbook

trojan spyware stealer formbook

Detects executables packed with SmartAssembly

Description Indicator Process Target
N/A N/A N/A N/A

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2928 set thread context of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 5916 set thread context of 3480 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Windows\Explorer.EXE
PID 5916 set thread context of 3480 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Windows\Explorer.EXE
PID 1504 set thread context of 3480 N/A C:\Windows\SysWOW64\NETSTAT.EXE C:\Windows\Explorer.EXE

Gathers network information

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A
N/A N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\NETSTAT.EXE N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Windows\Explorer.EXE N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2928 wrote to memory of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2928 wrote to memory of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2928 wrote to memory of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2928 wrote to memory of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2928 wrote to memory of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2928 wrote to memory of 5916 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 5916 wrote to memory of 1504 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Windows\SysWOW64\NETSTAT.EXE
PID 5916 wrote to memory of 1504 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Windows\SysWOW64\NETSTAT.EXE
PID 5916 wrote to memory of 1504 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Windows\SysWOW64\NETSTAT.EXE
PID 1504 wrote to memory of 4416 N/A C:\Windows\SysWOW64\NETSTAT.EXE C:\Windows\SysWOW64\cmd.exe
PID 1504 wrote to memory of 4416 N/A C:\Windows\SysWOW64\NETSTAT.EXE C:\Windows\SysWOW64\cmd.exe
PID 1504 wrote to memory of 4416 N/A C:\Windows\SysWOW64\NETSTAT.EXE C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe

"C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe"

C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe

"C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe"

C:\Windows\SysWOW64\NETSTAT.EXE

"C:\Windows\SysWOW64\NETSTAT.EXE"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 www.beatricesswarthout.xyz udp
US 172.67.171.253:80 www.beatricesswarthout.xyz tcp
US 8.8.8.8:53 253.171.67.172.in-addr.arpa udp
US 8.8.8.8:53 84.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 www.grupooceanique.com udp
US 8.8.8.8:53 www.tapeworm.xyz udp
US 8.8.8.8:53 78.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 www.repair-services.today udp
US 172.67.146.200:80 www.repair-services.today tcp
US 8.8.8.8:53 200.146.67.172.in-addr.arpa udp
US 8.8.8.8:53 www.tcindustrie.net udp
US 8.8.8.8:53 3.173.189.20.in-addr.arpa udp

Files

memory/2928-0-0x0000000000980000-0x0000000000A1C000-memory.dmp

memory/2928-1-0x0000000074680000-0x0000000074E30000-memory.dmp

memory/2928-2-0x00000000058A0000-0x0000000005E44000-memory.dmp

memory/2928-3-0x00000000053F0000-0x0000000005482000-memory.dmp

memory/2928-4-0x00000000055A0000-0x00000000055B0000-memory.dmp

memory/2928-5-0x00000000054B0000-0x00000000054BA000-memory.dmp

memory/2928-6-0x00000000057A0000-0x00000000057B4000-memory.dmp

memory/2928-7-0x0000000005860000-0x000000000586A000-memory.dmp

memory/2928-8-0x0000000005870000-0x000000000587C000-memory.dmp

memory/2928-9-0x0000000006660000-0x00000000066D6000-memory.dmp

memory/2928-10-0x0000000006920000-0x00000000069BC000-memory.dmp

memory/5916-11-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2928-13-0x0000000074680000-0x0000000074E30000-memory.dmp

memory/5916-14-0x0000000001040000-0x000000000138A000-memory.dmp

memory/5916-17-0x0000000000BB0000-0x0000000000BC4000-memory.dmp

memory/5916-16-0x0000000000400000-0x000000000042F000-memory.dmp

memory/3480-18-0x00000000082F0000-0x000000000845D000-memory.dmp

memory/5916-20-0x0000000000400000-0x000000000042F000-memory.dmp

memory/3480-22-0x0000000002B00000-0x0000000002BB6000-memory.dmp

memory/5916-21-0x0000000000FF0000-0x0000000001004000-memory.dmp

memory/1504-23-0x0000000000020000-0x000000000002B000-memory.dmp

memory/1504-24-0x0000000000020000-0x000000000002B000-memory.dmp

memory/1504-25-0x0000000000400000-0x000000000042F000-memory.dmp

memory/1504-26-0x0000000000B30000-0x0000000000E7A000-memory.dmp

memory/1504-27-0x0000000000400000-0x000000000042F000-memory.dmp

memory/1504-28-0x0000000000A80000-0x0000000000B13000-memory.dmp

memory/3480-31-0x0000000007AB0000-0x0000000007B92000-memory.dmp

memory/3480-32-0x0000000007AB0000-0x0000000007B92000-memory.dmp

memory/3480-35-0x0000000007AB0000-0x0000000007B92000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-03 01:33

Reported

2024-04-03 01:36

Platform

win7-20231129-en

Max time kernel

148s

Max time network

119s

Command Line

C:\Windows\Explorer.EXE

Signatures

Formbook

trojan spyware stealer formbook

Detects executables packed with SmartAssembly

Description Indicator Process Target
N/A N/A N/A N/A

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2344 set thread context of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2888 set thread context of 1356 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Windows\Explorer.EXE
PID 2564 set thread context of 1356 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\Explorer.EXE

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\explorer.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 2344 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe
PID 1356 wrote to memory of 2564 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 1356 wrote to memory of 2564 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 1356 wrote to memory of 2564 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 1356 wrote to memory of 2564 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\explorer.exe
PID 2564 wrote to memory of 2656 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe
PID 2564 wrote to memory of 2656 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe
PID 2564 wrote to memory of 2656 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe
PID 2564 wrote to memory of 2656 N/A C:\Windows\SysWOW64\explorer.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe

"C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe"

C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe

"C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe"

C:\Windows\SysWOW64\explorer.exe

"C:\Windows\SysWOW64\explorer.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Users\Admin\AppData\Local\Temp\bnY2j1hTDlb4vxF.exe"

Network

N/A

Files

memory/2344-0-0x0000000001390000-0x000000000142C000-memory.dmp

memory/2344-1-0x0000000074740000-0x0000000074E2E000-memory.dmp

memory/2344-2-0x0000000004CE0000-0x0000000004D20000-memory.dmp

memory/2344-3-0x0000000000420000-0x0000000000434000-memory.dmp

memory/2344-4-0x0000000000460000-0x000000000046A000-memory.dmp

memory/2344-5-0x0000000000470000-0x000000000047C000-memory.dmp

memory/2344-6-0x00000000051B0000-0x0000000005226000-memory.dmp

memory/2888-7-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2888-8-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2888-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2888-11-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2344-12-0x0000000074740000-0x0000000074E2E000-memory.dmp

memory/2888-14-0x0000000000930000-0x0000000000C33000-memory.dmp

memory/1356-15-0x0000000003AA0000-0x0000000003BA0000-memory.dmp

memory/2888-16-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2888-17-0x00000000002C0000-0x00000000002D4000-memory.dmp

memory/1356-18-0x0000000004EA0000-0x0000000004F6E000-memory.dmp

memory/2564-19-0x0000000000AE0000-0x0000000000D61000-memory.dmp

memory/2564-20-0x0000000000AE0000-0x0000000000D61000-memory.dmp

memory/2564-21-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2564-22-0x00000000026D0000-0x00000000029D3000-memory.dmp

memory/2564-23-0x0000000000080000-0x00000000000AF000-memory.dmp

memory/2564-26-0x00000000025E0000-0x0000000002673000-memory.dmp

memory/1356-27-0x0000000004EA0000-0x0000000004F6E000-memory.dmp