agenttesla | 676423afc2035dbb07114870ae1b2369b30e7251b75682d7a8888faa103d0c2d

Analysis

max time kernel
142s
max time network
147s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 02:58

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General

Target

PO-136477475364.exe
Size

1.2MB
MD5

f533a8bfbbc2396cab09b1d64ec8206f
SHA1

f4c554b1dfaeb870a3ec584abe293b0212e2f2f6
SHA256

968e835ddb77634082095a04add6efc6db48489371cd6763e626d00d4e4334ef
SHA512

4904704611b4fc09556c58f2e60b6b2c6d894d647eedc4b2f3f459742260489904dda586a9ecd86231c10930d075f064435f1caca2604474119f66c746e2b80d
SSDEEP

24576:3AHnh+eWsN3skA4RV1Hom2KXMmHaNmXbcrAtM1aCB8uSH5:qh+ZkldoPK8YaNmXbcrAtM1hWuO

Score

10^/10

agenttesla collection credential_access discovery keylogger persistence spyware stealer trojan

Malware Config

Signatures

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

AgentTesla payload 3 IoCs

resource	yara_rule
behavioral1/memory/2748-12-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/2748-11-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/2748-5-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003
Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
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
T1552.001
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\MefbZIXopp = "C:\\Users\\Public\\MefbZIXopp.vbs"	PO-136477475364.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows\CurrentVersion\Run\MyApp = "C:\\Users\\Admin\\AppData\\Local\\Temp\\MyApp\\MyApp.exe"	RegAsm.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
4	checkip.amazonaws.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2240 set thread context of 2748	2240	PO-136477475364.exe	28

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	PO-136477475364.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
2240	PO-136477475364.exe
2748	RegAsm.exe
2748	RegAsm.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2240	PO-136477475364.exe
2240	PO-136477475364.exe
2240	PO-136477475364.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2748	RegAsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28
PID 2240 wrote to memory of 2748	2240	PO-136477475364.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3434294380-2554721341-1919518612-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\PO-136477475364.exe
"C:\Users\Admin\AppData\Local\Temp\PO-136477475364.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2240
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2240-2-0x00000000000B0000-0x00000000000B1000-memory.dmp

Filesize
4KB

Download
memory/2748-4-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2748-12-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2748-11-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2748-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2748-5-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/2748-14-0x00000000004C0000-0x00000000004CA000-memory.dmp

Filesize
40KB

Download
memory/2748-15-0x00000000052C0000-0x0000000005300000-memory.dmp

Filesize
256KB

Download
memory/2748-16-0x00000000052C0000-0x0000000005300000-memory.dmp

Filesize
256KB

Download