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Analysis
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max time kernel
150s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20220721-en -
resource tags
arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system -
submitted
04/08/2022, 08:53
Static task
static1
Behavioral task
behavioral1
Sample
Halkbank,.pdf.exe
Resource
win7-20220715-en
Behavioral task
behavioral2
Sample
Halkbank,.pdf.exe
Resource
win10v2004-20220721-en
General
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Target
Halkbank,.pdf.exe
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Size
628KB
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MD5
a63e6e9c58e82cce53442ebacb9fb399
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SHA1
b82363c41eea39a1db51c2ac9bff713dfac171e7
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SHA256
ec8fddcd3c310a14168754ee1965cfb5c7d7c86360a146c1da4c042afb551dda
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SHA512
a69cb143ca04b34657421ccc366eb70a752d13e8cc363398486ec6f1abefa8032c156b7abfb38f7a9cc885f8410c835f9f945b515d75384325a7d1e800e7adc7
Malware Config
Signatures
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BluStealer
A Modular information stealer written in Visual Basic.
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StormKitty
StormKitty is an open source info stealer written in C#.
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StormKitty payload 1 IoCs
resource yara_rule behavioral2/memory/3608-143-0x0000000000D60000-0x0000000000D7A000-memory.dmp family_stormkitty -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AppLaunch.exe Key opened \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AppLaunch.exe Key opened \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AppLaunch.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 59 icanhazip.com -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4428 set thread context of 1244 4428 Halkbank,.pdf.exe 93 PID 1244 set thread context of 3608 1244 Halkbank,.pdf.exe 94 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0 AppLaunch.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier AppLaunch.exe -
Suspicious behavior: EnumeratesProcesses 7 IoCs
pid Process 4428 Halkbank,.pdf.exe 4428 Halkbank,.pdf.exe 4428 Halkbank,.pdf.exe 4428 Halkbank,.pdf.exe 4428 Halkbank,.pdf.exe 4428 Halkbank,.pdf.exe 4428 Halkbank,.pdf.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 4428 Halkbank,.pdf.exe Token: SeDebugPrivilege 3608 AppLaunch.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1244 Halkbank,.pdf.exe -
Suspicious use of WriteProcessMemory 13 IoCs
description pid Process procid_target PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 4428 wrote to memory of 1244 4428 Halkbank,.pdf.exe 93 PID 1244 wrote to memory of 3608 1244 Halkbank,.pdf.exe 94 PID 1244 wrote to memory of 3608 1244 Halkbank,.pdf.exe 94 PID 1244 wrote to memory of 3608 1244 Halkbank,.pdf.exe 94 PID 1244 wrote to memory of 3608 1244 Halkbank,.pdf.exe 94 PID 1244 wrote to memory of 3608 1244 Halkbank,.pdf.exe 94 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AppLaunch.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2372564722-193526734-2636556182-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 AppLaunch.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4428 -
C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Halkbank,.pdf.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1244 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe3⤵
- Accesses Microsoft Outlook profiles
- Checks processor information in registry
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:3608
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