agenttesla | 359c6dd6d5b5d3b1a0c3aa744d1df91f083efebeaf554b251d1607775d2dba55

General

Target
FR00098WED88_________.com.exe
Size 411KB
Sample201109-pwq72hyp1e
SHA256 359c6dd6d5b5d3b1a0c3aa744d1df91f083efebeaf554b251d1607775d2dba55
MD5 55041e67523a23b8c38cb0986fa80081
SHA1 53ad642ab5f78b27d8d73a0af337578396863a58
SHA512 cd492e20836cfa961d06b96b9a0da34f9d70c5856d140aa463c1cc538ee927974a7a1c6eb20153ff9e966033b06765d06854f81e34a757f4611b05ef490f7f0a
MD5 SHA1 SHA512

Score

10^/10

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

AgentTesla Payload 4 IoCs

resource	yara_rule
behavioral1/memory/360-0-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/360-1-0x00000000004473AE-mapping.dmp	family_agenttesla
behavioral1/memory/360-2-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/360-3-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	RegSvcs.exe

Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

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	FR00098WED88_________.com.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	FR00098WED88_________.com.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\noApp = "C:\\Users\\Admin\\AppData\\Local\\Temp\\noApp\\noApp.exe"	RegSvcs.exe

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

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	FR00098WED88_________.com.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	FR00098WED88_________.com.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 836 set thread context of 360	836	FR00098WED88_________.com.exe	31

Suspicious behavior: EnumeratesProcesses 4 IoCs

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	836	FR00098WED88_________.com.exe
Token: SeDebugPrivilege	360	RegSvcs.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 432	836	FR00098WED88_________.com.exe	30
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31
PID 836 wrote to memory of 360	836	FR00098WED88_________.com.exe	31

C:\Users\Admin\AppData\Local\Temp\FR00098WED88_________.com.exe
"C:\Users\Admin\AppData\Local\Temp\FR00098WED88_________.com.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
PID:836
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "{path}"
  2⤵
  PID:432
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
  "{path}"
  2⤵
  - Drops file in Drivers directory
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:360