agenttesla | 8babb9a5318d0b2fa43d6c18e91a23a70de547243db91f866e50bb2ff1b7db8b

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	SpyderCrypter.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

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

Executes dropped EXE 1 IoCs

pid	Process
604	SpyderResources.exe

Loads dropped DLL 6 IoCs

pid	Process
2080	SpyderCrypter.exe
2888	WerFault.exe
2888	WerFault.exe
2888	WerFault.exe
2888	WerFault.exe
2888	WerFault.exe

Themida packer 2 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/2080-9-0x0000000001120000-0x0000000001B2C000-memory.dmp	themida
behavioral1/memory/2080-10-0x0000000001120000-0x0000000001B2C000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	SpyderCrypter.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	raw.githubusercontent.com
5	raw.githubusercontent.com

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2888	604	WerFault.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SpyderCrypter.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SpyderResources.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	SpyderCrypter.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	SpyderCrypter.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemVersion	SpyderCrypter.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2080	SpyderCrypter.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 604	2080	SpyderCrypter.exe	31
PID 2080 wrote to memory of 604	2080	SpyderCrypter.exe	31
PID 2080 wrote to memory of 604	2080	SpyderCrypter.exe	31
PID 2080 wrote to memory of 604	2080	SpyderCrypter.exe	31
PID 604 wrote to memory of 2888	604	SpyderResources.exe	32
PID 604 wrote to memory of 2888	604	SpyderResources.exe	32
PID 604 wrote to memory of 2888	604	SpyderResources.exe	32
PID 604 wrote to memory of 2888	604	SpyderResources.exe	32

C:\Users\Admin\AppData\Local\Temp\SpyderCrypter.exe
"C:\Users\Admin\AppData\Local\Temp\SpyderCrypter.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Users\Admin\AppData\Local\Temp\SpyderResources.exe
  "C:\Users\Admin\AppData\Local\Temp\SpyderResources.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:604
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 604 -s 592
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:2888

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

3

System Information Discovery

4

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Web Service