agenttesla | 8f004bc9aec06467c6d02274e540d990f49f936a089fe46c651fe80b38b5a4cd

General

Target
inquiry.exe
Size 1.1MB
Sample200828-4n45552zan
SHA256 8f004bc9aec06467c6d02274e540d990f49f936a089fe46c651fe80b38b5a4cd
MD5 6c02d06c0de5067c4c3b29faa5e0bc25
SHA1 399efdb57be9352580dfff8313d0b2b1c8575da6
SHA512 7ef9e76e3b875a566a408067fe9031da182a805be01cfda2a6e0efc41bbc109a090ba3c1bb6b7339adafccde04bad7065620619dad58e653ec023e4c0ef023d4
MD5 SHA1 SHA512

Score

10^/10

keylogger stealer evasion spyware trojan agenttesla

Malware Config

Extracted

Credentials

Protocol
smtp
Host
smtp.millndustries.com
Port
587
Username
[email protected]
Password
{zdog:g7S@R3

Signatures

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

AgentTesla Payload 3 IoCs

keylogger stealer

resource	yara_rule
behavioral2/memory/424-6-0x0000000000400000-0x0000000000466000-memory.dmp	agent_tesla
behavioral2/memory/424-6-0x0000000000400000-0x0000000000466000-memory.dmp	agent_tesla
behavioral2/memory/424-7-0x0000000000460ACE-mapping.dmp	agent_tesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
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

T1012

System Information Discovery

T1082

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

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

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

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

Data from Local System
T1005

Credentials in Files
T1081

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 508 set thread context of 424	508	inquiry.exe	79

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.exe

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

T1053

pid	Process
956	schtasks.exe

Modifies data under HKEY_USERS 6 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 0a093b4c5d7dd601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\windows\CurrentVersion\Internet Settings\Connections	svchost.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
508	inquiry.exe
424	inquiry.exe
424	inquiry.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeShutdownPrivilege	900	svchost.exe
Token: SeCreatePagefilePrivilege	900	svchost.exe
Token: SeDebugPrivilege	508	inquiry.exe
Token: SeDebugPrivilege	424	inquiry.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
424	inquiry.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 508 wrote to memory of 956	508	inquiry.exe	77
PID 508 wrote to memory of 956	508	inquiry.exe	77
PID 508 wrote to memory of 956	508	inquiry.exe	77
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79
PID 508 wrote to memory of 424	508	inquiry.exe	79

C:\Users\Admin\AppData\Local\Temp\inquiry.exe
"C:\Users\Admin\AppData\Local\Temp\inquiry.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:508
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\buoISaUJZPqhxs" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8C62.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:956
- C:\Users\Admin\AppData\Local\Temp\inquiry.exe
  "C:\Users\Admin\AppData\Local\Temp\inquiry.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:424

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:900