Analysis
- max time kernel
133s - max time network
122s - platform
windows7_x64 - resource
win7-en-20211208 - submitted
30/01/2022, 14:18
General
- Target Draft Quotation 20220130.exe
- Size 483KB
- Sample220130-rmaj9acccj
- SHA256 7ef2a4ddbdb6f28ec39e26bbd6883221326eaf51babfca78fdb27f1d5f4fdbe1
Malware Config
Extracted
-
agenttesla
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https://api.telegram.org/bot2030557675:AAF2CRvHF_rfT7tYXz9VN8YUb6kF5qxu_xg/sendDocument
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 5 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.
- 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 behavior: RenamesItself 1 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 25 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Draft Quotation 20220130.exe"C:\Users\Admin\AppData\Local\Temp\Draft Quotation 20220130.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\Draft Quotation 20220130.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\UJXlESjG.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\UJXlESjG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp71A7.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Draft Quotation 20220130.exe"C:\Users\Admin\AppData\Local\Temp\Draft Quotation 20220130.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\Draft Quotation 20220130.exe"C:\Users\Admin\AppData\Local\Temp\Draft Quotation 20220130.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
memory/1156-77-0x0000000001E81000-0x0000000001E82000-memory.dmp
memory/1156-74-0x0000000001E80000-0x0000000001E81000-memory.dmp
memory/1156-79-0x0000000001E82000-0x0000000001E84000-memory.dmp
memory/1272-72-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1272-73-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1272-68-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1272-69-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1272-70-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1272-71-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1272-76-0x0000000004B70000-0x0000000004B71000-memory.dmp
memory/1672-56-0x0000000075DF1000-0x0000000075DF3000-memory.dmp
memory/1672-57-0x0000000004680000-0x0000000004681000-memory.dmp
memory/1672-55-0x0000000000160000-0x00000000001E0000-memory.dmp
memory/1672-58-0x00000000003D0000-0x00000000003DC000-memory.dmp
memory/1672-59-0x0000000004F40000-0x0000000004FB0000-memory.dmp
memory/1980-75-0x0000000002500000-0x000000000314A000-memory.dmp
memory/1980-78-0x0000000002500000-0x000000000314A000-memory.dmp
memory/1980-80-0x0000000002500000-0x000000000314A000-memory.dmp