agenttesla | a284fe0ba3ca99fb776ffcff4ca1da7a839bcbd301e4b07aea056ef5ce3909d3

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	Offer_CTJV.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\VMware, Inc.\VMware Tools	Offer_CTJV.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Offer_CTJV.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Offer_CTJV.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Offer_CTJV.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Offer_CTJV.exe
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Offer_CTJV.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	api.ipify.org
5	api.ipify.org

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Offer_CTJV.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Offer_CTJV.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 916 set thread context of 876	916	Offer_CTJV.exe	35

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

pid	Process
1504	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
876	Offer_CTJV.exe
876	Offer_CTJV.exe
1364	powershell.exe
832	powershell.exe
876	Offer_CTJV.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	876	Offer_CTJV.exe
Token: SeDebugPrivilege	1364	powershell.exe
Token: SeDebugPrivilege	832	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 1364	916	Offer_CTJV.exe	28
PID 916 wrote to memory of 1364	916	Offer_CTJV.exe	28
PID 916 wrote to memory of 1364	916	Offer_CTJV.exe	28
PID 916 wrote to memory of 1364	916	Offer_CTJV.exe	28
PID 916 wrote to memory of 832	916	Offer_CTJV.exe	31
PID 916 wrote to memory of 832	916	Offer_CTJV.exe	31
PID 916 wrote to memory of 832	916	Offer_CTJV.exe	31
PID 916 wrote to memory of 832	916	Offer_CTJV.exe	31
PID 916 wrote to memory of 1504	916	Offer_CTJV.exe	33
PID 916 wrote to memory of 1504	916	Offer_CTJV.exe	33
PID 916 wrote to memory of 1504	916	Offer_CTJV.exe	33
PID 916 wrote to memory of 1504	916	Offer_CTJV.exe	33
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35
PID 916 wrote to memory of 876	916	Offer_CTJV.exe	35

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Offer_CTJV.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Offer_CTJV.exe

C:\Users\Admin\AppData\Local\Temp\Offer_CTJV.exe
"C:\Users\Admin\AppData\Local\Temp\Offer_CTJV.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:916
- 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\Offer_CTJV.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1364
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\tBQANbInzY.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:832
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tBQANbInzY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6B13.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1504
- C:\Users\Admin\AppData\Local\Temp\Offer_CTJV.exe
  "C:\Users\Admin\AppData\Local\Temp\Offer_CTJV.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:876

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

Persistence

Scheduled Task

Privilege Escalation

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Credentials in Files

T1081

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

T1082

Virtualization/Sandbox Evasion