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Analysis
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max time kernel
99s -
max time network
118s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
08/02/2023, 08:56
Static task
static1
Behavioral task
behavioral1
Sample
Credit Note.pdf.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
Credit Note.pdf.exe
Resource
win10v2004-20221111-en
General
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Target
Credit Note.pdf.exe
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Size
567KB
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MD5
75e1d17c8431d6b7d840fcdfe0dd9a2d
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SHA1
3a71b6a0b1e6bdfbe6b3ed9624f17f504072f068
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SHA256
efa920373efaa4bd26fb1704e6ea6cb05ed8e91b5e552db7ff2a7764ace07758
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SHA512
f6e9ed253e735bfd95392914d33eacd0c70057e1335b6f2564ba7d40455bec2249bb842042b866bf35c9364383ea8882adb20cd1d26f780e08dfb35d88bc9777
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SSDEEP
12288:9cBXiEZz7yDne7f4WYMTyPdLX2tuCAe/ZXazVt1Ek6ugpRZN7gNFSxCDH:uRJe7MTyPdLX2tuCAe/ZXazSkKacxC
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.ppecindia.com - Port:
587 - Username:
[email protected] - Password:
accounts@123$ - Email To:
[email protected]
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation Credit Note.pdf.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\yGbzOMp = "C:\\Users\\Admin\\AppData\\Roaming\\yGbzOMp\\yGbzOMp.exe" RegSvcs.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3624 set thread context of 1912 3624 Credit Note.pdf.exe 96 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 4876 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 5 IoCs
pid Process 3624 Credit Note.pdf.exe 3624 Credit Note.pdf.exe 3624 Credit Note.pdf.exe 3624 Credit Note.pdf.exe 3624 Credit Note.pdf.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3624 Credit Note.pdf.exe Token: SeDebugPrivilege 1912 RegSvcs.exe -
Suspicious use of WriteProcessMemory 17 IoCs
description pid Process procid_target PID 3624 wrote to memory of 4876 3624 Credit Note.pdf.exe 92 PID 3624 wrote to memory of 4876 3624 Credit Note.pdf.exe 92 PID 3624 wrote to memory of 4876 3624 Credit Note.pdf.exe 92 PID 3624 wrote to memory of 1460 3624 Credit Note.pdf.exe 94 PID 3624 wrote to memory of 1460 3624 Credit Note.pdf.exe 94 PID 3624 wrote to memory of 1460 3624 Credit Note.pdf.exe 94 PID 3624 wrote to memory of 2544 3624 Credit Note.pdf.exe 95 PID 3624 wrote to memory of 2544 3624 Credit Note.pdf.exe 95 PID 3624 wrote to memory of 2544 3624 Credit Note.pdf.exe 95 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 PID 3624 wrote to memory of 1912 3624 Credit Note.pdf.exe 96 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Credit Note.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Credit Note.pdf.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3624 -
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TZiqjCD" /XML "C:\Users\Admin\AppData\Local\Temp\tmpED24.tmp"2⤵
- Creates scheduled task(s)
PID:4876
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵PID:1460
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵PID:2544
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1912
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
1KB
MD503cc8b77eeaf377a5ab3a465d47cb9c0
SHA17c930db5ea7e398f1ae5c2e4deda8d42466ddc36
SHA256a04cfd4ca1bb23a6b4a5ff5d9101ca60b46db2137df8ce7f993e2ddefc29f7d1
SHA51253abf6c08bb02249e72b61c51df9e8612add3750dcc9692cb9559baab44e7f402ad2ca677a3f22b9e0e64defa163278f89d1467294dbe2c1aaee88e92b5ea774