Analysis
- max time kernel
138s - max time network
126s - platform
windows10_x64 - resource
win10v20201028 - submitted
09/11/2020, 20:06
General
- Target SecuriteInfo.com.FileRepMalware.28825.exe
- Size 444KB
- Sample201109-cefbv4mraj
- SHA256 d1c1e3948a60d00f55a9e6e9eaf68ab0b8a18480d863a5a568cccdeeb75162fa
Malware Config
Extracted
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agenttesla
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Protocol
smtp
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Host
mail.okgrocer.co.za
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Port
587
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Username
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Password
Theunis@123
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- AgentTesla Payload 13 IoCs
- Executes dropped EXE 2 IoCs
- Obfuscated with Agile.Net obfuscator 1 IoCs
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Suspicious behavior: EnumeratesProcesses 33 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 17 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.FileRepMalware.28825.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.FileRepMalware.28825.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v winservie /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\winservie.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v winservie /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\winservie.exe"3⤵
- Adds Run key to start application
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C:\Users\Admin\AppData\Roaming\winservie.exe"C:\Users\Admin\AppData\Roaming\winservie.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2100 -s 14524⤵
- Program crash
- 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/512-27-0x0000000005BE0000-0x0000000005BE1000-memory.dmp
memory/512-16-0x0000000073CE0000-0x00000000743CE000-memory.dmp
memory/616-52-0x0000000005800000-0x0000000005801000-memory.dmp
memory/616-39-0x0000000004CC0000-0x0000000004CC1000-memory.dmp
memory/2100-37-0x0000000005520000-0x0000000005521000-memory.dmp
memory/2100-28-0x0000000000400000-0x0000000000452000-memory.dmp
memory/2100-32-0x0000000073CE0000-0x00000000743CE000-memory.dmp
memory/2100-36-0x0000000004FA0000-0x0000000004FA1000-memory.dmp
memory/2100-38-0x0000000005AB0000-0x0000000005AB1000-memory.dmp
memory/4692-0-0x0000000073CE0000-0x00000000743CE000-memory.dmp
memory/4692-3-0x00000000026B0000-0x00000000026BF000-memory.dmp
memory/4692-4-0x0000000005310000-0x0000000005311000-memory.dmp
memory/4692-5-0x00000000052E0000-0x00000000052E2000-memory.dmp
memory/4692-6-0x0000000005A70000-0x0000000005A71000-memory.dmp
memory/4692-7-0x0000000005A60000-0x0000000005A62000-memory.dmp
memory/4692-8-0x0000000005D00000-0x0000000005D01000-memory.dmp
memory/4692-9-0x0000000005B50000-0x0000000005B52000-memory.dmp
memory/4692-1-0x0000000000500000-0x0000000000501000-memory.dmp