Analysis
- max time kernel
120s - max time network
130s - platform
windows10-2004_x64 - resource
win10v2004-20220414-en - submitted
15/04/2022, 09:22
General
- Target k1d.exe
- Size 938KB
- Sample220415-lbwqfsfcfj
- SHA256 f8455e5d2f2ddddf2f3e2764602974a85d680d33e5dd13d636882a1e7523f254
Malware Config
Extracted
-
Protocol
smtp
-
Host
us2.smtp.mailhostbox.com
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Port
587
-
Username
-
Password
oqyxieh7
Extracted
-
agenttesla
-
Protocol
smtp
-
Host
us2.smtp.mailhostbox.com
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Port
587
-
Username
-
Password
oqyxieh7
Signatures
- AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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.
- Accesses Microsoft Outlook profiles 1 TTPs 3 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.
- 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 10 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
- outlook_office_path 1 IoCs
- outlook_win_path 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\k1d.exe"C:\Users\Admin\AppData\Local\Temp\k1d.exe"1⤵
- Checks computer location settings
- 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\Roaming\FHThfANnY.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\FHThfANnY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6C66.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\k1d.exe"C:\Users\Admin\AppData\Local\Temp\k1d.exe"2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
k1d.exe.log
tmp6C66.tmp
memory/3472-144-0x0000000004DB0000-0x0000000004DD2000-memory.dmp
memory/3472-146-0x0000000004C50000-0x0000000004C6E000-memory.dmp
memory/3472-158-0x00000000074C0000-0x00000000074C8000-memory.dmp
memory/3472-157-0x00000000074E0000-0x00000000074FA000-memory.dmp
memory/3472-138-0x0000000002550000-0x0000000002586000-memory.dmp
memory/3472-156-0x00000000073D0000-0x00000000073DE000-memory.dmp
memory/3472-140-0x00000000050D0000-0x00000000056F8000-memory.dmp
memory/3472-155-0x0000000007420000-0x00000000074B6000-memory.dmp
memory/3472-153-0x0000000007210000-0x000000000721A000-memory.dmp
memory/3472-152-0x00000000071A0000-0x00000000071BA000-memory.dmp
memory/3472-151-0x00000000077F0000-0x0000000007E6A000-memory.dmp
memory/3472-145-0x0000000005050000-0x00000000050B6000-memory.dmp
memory/3472-150-0x0000000006440000-0x000000000645E000-memory.dmp
memory/3472-147-0x00000000026B5000-0x00000000026B7000-memory.dmp
memory/3472-148-0x0000000006460000-0x0000000006492000-memory.dmp
memory/3472-149-0x0000000070AF0000-0x0000000070B3C000-memory.dmp
memory/4064-134-0x000000000B300000-0x000000000B30A000-memory.dmp
memory/4064-130-0x0000000000FD0000-0x00000000010C2000-memory.dmp
memory/4064-131-0x000000000B7B0000-0x000000000BD54000-memory.dmp
memory/4064-132-0x000000000B3A0000-0x000000000B432000-memory.dmp
memory/4064-133-0x000000000B440000-0x000000000B4DC000-memory.dmp
memory/4064-135-0x0000000005ED0000-0x0000000005F36000-memory.dmp
memory/4612-142-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4612-154-0x00000000065D0000-0x0000000006620000-memory.dmp