agenttesla | 2ff509b5c75381343d7580089cf26cffde2d92084e171753685575d63fdf0009

General

Target
Purchase Order.exe
Size 460KB
Sample201109-ccd5yavp1e
SHA256 2ff509b5c75381343d7580089cf26cffde2d92084e171753685575d63fdf0009
MD5 60bf6075a9dd4e6833ef1c3874900384
SHA1 998acf18196a55c68db851dc00f78c95774f83e7
SHA512 771a82bdb7bf75b19befc22492a5b3803e3a83fc5ec86a3001b98e1ce2294870d1fed1726f2e5c15f6569a75beca795fd6246cd74f99e2dde97803c591509ba0
MD5 SHA1 SHA512

Score

10^/10

agenttesla evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Credentials

Protocol
smtp
Host
mail.samudrapanel.com
Port
587
Username
[email protected]
Password
weslali234

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.samudrapanel.com
Port
587
Username
[email protected]
Password
weslali234

Signatures

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

AgentTesla Payload 2 IoCs

resource	yara_rule
behavioral2/memory/836-11-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral2/memory/836-12-0x000000000044A9DE-mapping.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

rezer0 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral2/memory/728-6-0x0000000005820000-0x0000000005871000-memory.dmp	rezer0

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	Purchase Order.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase Order.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	Purchase Order.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0	Purchase Order.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 728 set thread context of 836	728	Purchase Order.exe	81

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

T1053

pid	Process
3680	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
836	Purchase Order.exe
836	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	836	Purchase Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
836	Purchase Order.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 728 wrote to memory of 3680	728	Purchase Order.exe	79
PID 728 wrote to memory of 3680	728	Purchase Order.exe	79
PID 728 wrote to memory of 3680	728	Purchase Order.exe	79
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 728 wrote to memory of 836	728	Purchase Order.exe	81
PID 836 wrote to memory of 2276	836	Purchase Order.exe	82
PID 836 wrote to memory of 2276	836	Purchase Order.exe	82
PID 836 wrote to memory of 2276	836	Purchase Order.exe	82

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:728
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sIkncmSrKvyN" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2B76.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:3680
- C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
  "{path}"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:836
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:2276