Analysis
- max time kernel
124s - max time network
26s - platform
windows7_x64 - resource
win7-en-20210920 - submitted
05/10/2021, 09:03
General
- Target New Inquiry PR #270473. 05.10.2021.xlxs.exe
- Size 509KB
- Sample211005-kz2e6shee4
- SHA256 8664bd0c09f992c53b0db3db2b6d5b5a14802fc7dd98d2e820d2df78fd26764e
Malware Config
Extracted
-
agenttesla
-
Protocol
smtp
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Host
smtp.yandex.com
-
Port
587
-
Username
-
Password
mosqueboy100
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 4 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.
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 16 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\New Inquiry PR #270473. 05.10.2021.xlxs.exe"C:\Users\Admin\AppData\Local\Temp\New Inquiry PR #270473. 05.10.2021.xlxs.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\New Inquiry PR #270473. 05.10.2021.xlxs.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"2⤵
- 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/612-54-0x0000000001230000-0x0000000001231000-memory.dmp
memory/612-56-0x0000000000620000-0x0000000000621000-memory.dmp
memory/612-57-0x0000000000400000-0x000000000040A000-memory.dmp
memory/612-58-0x0000000004FE0000-0x000000000503A000-memory.dmp
memory/964-65-0x00000000023D0000-0x000000000301A000-memory.dmp
memory/964-60-0x0000000075651000-0x0000000075653000-memory.dmp
memory/964-67-0x00000000023D0000-0x000000000301A000-memory.dmp
memory/964-68-0x00000000023D0000-0x000000000301A000-memory.dmp
memory/1520-61-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1520-63-0x0000000000400000-0x000000000043C000-memory.dmp
memory/1520-66-0x0000000004730000-0x0000000004731000-memory.dmp
memory/1520-69-0x0000000004731000-0x0000000004732000-memory.dmp