Analysis
- max time kernel
136s - max time network
112s - platform
windows10_x64 - resource
win10v20210408 - submitted
07/05/2021, 13:35
General
- Target RFQ11054.pdf.exe
- Size 679KB
- Sample210507-kfl53ptr56
- SHA256 ea86beebc5237d00ee6fd3cffbbb07e0e625da940cc056e07ff26b9f47ed9a5f
Malware Config
Extracted
-
agenttesla
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Protocol
smtp
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Host
mail.saudimedlabexpo.com
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Port
587
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Username
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Password
]dTqP-]^T]Pt
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 3 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs
- Looks for VMWare Tools registry key 2 TTPs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Adds Run key to start application 2 TTPs 1 IoCs
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 12 IoCs
- Suspicious use of AdjustPrivilegeToken 5 IoCs
- Suspicious use of WriteProcessMemory 20 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\RFQ11054.pdf.exe"C:\Users\Admin\AppData\Local\Temp\RFQ11054.pdf.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\RFQ11054.pdf.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\geFvfxQBeF.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\geFvfxQBeF" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF07B.tmp"2⤵
- Creates scheduled task(s)
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\geFvfxQBeF.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\RFQ11054.pdf.exe"C:\Users\Admin\AppData\Local\Temp\RFQ11054.pdf.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/512-161-0x0000000005660000-0x0000000005B5E000-memory.dmp
memory/512-148-0x0000000000400000-0x000000000043C000-memory.dmp
memory/520-170-0x0000000008160000-0x0000000008161000-memory.dmp
memory/520-162-0x0000000006A52000-0x0000000006A53000-memory.dmp
memory/520-160-0x0000000006A50000-0x0000000006A51000-memory.dmp
memory/520-192-0x000000007F110000-0x000000007F111000-memory.dmp
memory/520-196-0x0000000006A53000-0x0000000006A54000-memory.dmp
memory/1316-145-0x0000000008290000-0x0000000008291000-memory.dmp
memory/1316-128-0x0000000004F20000-0x0000000004F21000-memory.dmp
memory/1316-132-0x00000000073F2000-0x00000000073F3000-memory.dmp
memory/1316-194-0x000000007E940000-0x000000007E941000-memory.dmp
memory/1316-137-0x00000000079B0000-0x00000000079B1000-memory.dmp
memory/1316-139-0x00000000080D0000-0x00000000080D1000-memory.dmp
memory/1316-131-0x00000000073F0000-0x00000000073F1000-memory.dmp
memory/1316-129-0x0000000007A30000-0x0000000007A31000-memory.dmp
memory/1316-197-0x00000000073F3000-0x00000000073F4000-memory.dmp
memory/1860-173-0x00000000084E0000-0x00000000084E1000-memory.dmp
memory/1860-158-0x0000000004C30000-0x0000000004C31000-memory.dmp
memory/1860-159-0x0000000004C32000-0x0000000004C33000-memory.dmp
memory/1860-195-0x0000000004C33000-0x0000000004C34000-memory.dmp
memory/1860-167-0x00000000070A0000-0x00000000070A1000-memory.dmp
memory/1860-193-0x000000007EB70000-0x000000007EB71000-memory.dmp
memory/3728-114-0x0000000000690000-0x0000000000691000-memory.dmp
memory/3728-120-0x0000000004F60000-0x0000000004F61000-memory.dmp
memory/3728-121-0x0000000005200000-0x000000000520E000-memory.dmp
memory/3728-122-0x0000000005D50000-0x0000000005DEA000-memory.dmp
memory/3728-123-0x0000000000DA0000-0x0000000000E00000-memory.dmp
memory/3728-119-0x0000000004F50000-0x000000000544E000-memory.dmp
memory/3728-125-0x000000000B310000-0x000000000B311000-memory.dmp
memory/3728-118-0x0000000005090000-0x0000000005091000-memory.dmp
memory/3728-117-0x0000000004FF0000-0x0000000004FF1000-memory.dmp
memory/3728-116-0x0000000005450000-0x0000000005451000-memory.dmp