agenttesla | f1b3c6cfecb62010f8cd4cb100a760865d244ee9bdf92d849f2561d2cd36882b

General

Target
KINETRICS-INV AND CONTRACT OFFER_Pdf.js
Size 618KB
Sample220121-2t1ecsbhb5
SHA256 ab50b83463c8797644dbf07441650e06510b9d3aa70478e218dd0a1116c5001f
MD5 fc044ff2b1cbc1f3135d32f872feb918
SHA1 cd27200ed74b3bf66450f5dbebe39e76b906c006
SHA512 a64da0d189fb7ea4a821cb892736f0e88e22a56eabcb02439e89512378755110405c2f792f20c5357cde783286ad0b7660c2166a0cc1a513ba8c0d539783aa84
MD5 SHA1 SHA512

Score

10^/10

agenttesla wshrat keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol
smtp
Host
mail.zolvtek.com
Port
587
Username
[email protected]
Password
susan1234

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

WSHRAT Payload 1 IoCs

resource	yara_rule
behavioral2/files/0x000800000001ab32-266.dat	family_wshrat

AgentTesla Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000700000001ab36-431.dat	family_agenttesla
behavioral2/files/0x000700000001ab36-537.dat	family_agenttesla

Blocklisted process makes network request 6 IoCs

flow	pid	Process
12	788	wscript.exe
14	788	wscript.exe
16	788	wscript.exe
25	788	wscript.exe
27	788	wscript.exe
34	788	wscript.exe

Executes dropped EXE 1 IoCs

pid	Process
708	152020latest.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\KINETRICS-INV AND CONTRACT OFFER_Pdf.js	wscript.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\KINETRICS-INV AND CONTRACT OFFER_Pdf.js	wscript.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

Adds Run key to start application 2 TTPs 9 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KINETRICS-INV AND CONTRACT OFFER_Pdf = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\KINETRICS-INV AND CONTRACT OFFER_Pdf.js\""	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\KINETRICS-INV AND CONTRACT OFFER_Pdf = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\KINETRICS-INV AND CONTRACT OFFER_Pdf.js\""	wscript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\KINETRICS-INV AND CONTRACT OFFER_Pdf = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\KINETRICS-INV AND CONTRACT OFFER_Pdf.js\""	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\software\microsoft\windows\currentversion\run	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Key created	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\software\microsoft\windows\currentversion\run	wscript.exe
Key created	\REGISTRY\MACHINE\software\microsoft\windows\currentversion\run	wscript.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\KsVAR = "C:\\Users\\Admin\\AppData\\Roaming\\KsVAR\\KsVAR.exe"	152020latest.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2361464256-2201551969-2316606395-1000\Software\Microsoft\Windows\CurrentVersion\Run\KINETRICS-INV AND CONTRACT OFFER_Pdf = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Roaming\\KINETRICS-INV AND CONTRACT OFFER_Pdf.js\""	wscript.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
11	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
708	152020latest.exe
708	152020latest.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	708	152020latest.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4016 wrote to memory of 788	4016	wscript.exe	68
PID 4016 wrote to memory of 788	4016	wscript.exe	68
PID 788 wrote to memory of 708	788	wscript.exe	69
PID 788 wrote to memory of 708	788	wscript.exe	69
PID 788 wrote to memory of 708	788	wscript.exe	69
PID 708 wrote to memory of 1332	708	152020latest.exe	73
PID 708 wrote to memory of 1332	708	152020latest.exe	73
PID 708 wrote to memory of 1332	708	152020latest.exe	73

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\KINETRICS-INV AND CONTRACT OFFER_Pdf.js"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:4016
- C:\Windows\System32\wscript.exe
  "C:\Windows\System32\wscript.exe" //B "C:\Users\Admin\AppData\Roaming\KINETRICS-INV AND CONTRACT OFFER_Pdf.js"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:788
- - C:\Users\Admin\AppData\Roaming\152020latest.exe
    "C:\Users\Admin\AppData\Roaming\152020latest.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:708
  - - C:\Windows\SysWOW64\netsh.exe
      "netsh" wlan show profile
      4⤵
      PID:1332