Analysis
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max time kernel
103s -
max time network
136s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
16/11/2024, 07:36
Static task
static1
Behavioral task
behavioral1
Sample
5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe
Resource
win10v2004-20241007-en
General
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Target
5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe
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Size
1.1MB
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MD5
7ff7fe2c6873fe797424222a0b5870e4
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SHA1
d6667dffbf6623ee8e6c3a081243725250d9113d
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SHA256
5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b
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SHA512
cc1c7bcfe8fe67d6b3664c519464751816db2fc1fff48a57be7bdadf563eaa55129687f975c234888e771052844223228c63fca4b8711a380c42021327014264
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SSDEEP
12288:Xtb20Qc3lT7af41ePBRYuQLKpqeUhbTv5OFgNuPPpHSga0yln5XgYQ3J9a+PN2O5:Xtb20pkaCqT5TBWgNQ7a0G5X4s+wO6A
Malware Config
Signatures
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Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Bohmerwald.vbs Bohmerwald.exe -
Executes dropped EXE 1 IoCs
pid Process 3228 Bohmerwald.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 13 checkip.dyndns.org -
AutoIT Executable 1 IoCs
AutoIT scripts compiled to PE executables.
resource yara_rule behavioral2/files/0x0002000000022af2-9.dat autoit_exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3228 set thread context of 2064 3228 Bohmerwald.exe 88 -
System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language Bohmerwald.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language RegSvcs.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 2064 RegSvcs.exe -
Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 3228 Bohmerwald.exe 3228 Bohmerwald.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2064 RegSvcs.exe -
Suspicious use of FindShellTrayWindow 4 IoCs
pid Process 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 3228 Bohmerwald.exe 3228 Bohmerwald.exe -
Suspicious use of SendNotifyMessage 4 IoCs
pid Process 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 3228 Bohmerwald.exe 3228 Bohmerwald.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2816 wrote to memory of 3228 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 86 PID 2816 wrote to memory of 3228 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 86 PID 2816 wrote to memory of 3228 2816 5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe 86 PID 3228 wrote to memory of 2064 3228 Bohmerwald.exe 88 PID 3228 wrote to memory of 2064 3228 Bohmerwald.exe 88 PID 3228 wrote to memory of 2064 3228 Bohmerwald.exe 88 PID 3228 wrote to memory of 2064 3228 Bohmerwald.exe 88 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe"C:\Users\Admin\AppData\Local\Temp\5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2816 -
C:\Users\Admin\AppData\Local\Fonda\Bohmerwald.exe"C:\Users\Admin\AppData\Local\Temp\5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:3228 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"C:\Users\Admin\AppData\Local\Temp\5f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b.exe"3⤵
- Accesses Microsoft Outlook profiles
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:2064
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.1MB
MD57ff7fe2c6873fe797424222a0b5870e4
SHA1d6667dffbf6623ee8e6c3a081243725250d9113d
SHA2565f97099c9597917ad3091e70910dc93ded0181185c1878fa4dfffaf540b46e4b
SHA512cc1c7bcfe8fe67d6b3664c519464751816db2fc1fff48a57be7bdadf563eaa55129687f975c234888e771052844223228c63fca4b8711a380c42021327014264
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Filesize
91KB
MD5ac298e33ec8d28eebdef77dd78055100
SHA1724b420cd53ede6d20c06091ef6f93595cc526e4
SHA256258bc185214703ef73acb225c39ccd845ee8d267ca019e25db5bf4c95305996d
SHA512a4a9339c5456e4f7e71042cad50c4ef8f6129cace8f5965cc8817e591ea3d396afeafa2ba54877b8018233d26f81db2a909553d55828e7c4c0a34831148b25ab