agenttesla | a98363bdb8463df20c4d516540582eef30b77dac637132c137511845de89f533

General

Target

ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
Size

1.4MB
MD5

ec546e1a4d7f40aeb07bb8ca59b5e2d6
SHA1

2d6620d65e0947fdafa0b14cc67341fcfa836950
SHA256

a98363bdb8463df20c4d516540582eef30b77dac637132c137511845de89f533
SHA512

88623a66c57bbbb244d0ebefec1607cf60a065ac62a69903191caff1c9ec68d68ddc0c6eba80b41db4c1ebed1d9f0ecbc788c8b585c602411bf750c92e3b4337
SSDEEP

24576:4AHnh+eWsN3skA4RV1Hom2KXMmHaT9HDzhBPeXDdq8Ba5:/h+ZkldoPK8YaTD8e

Score

10^/10

agenttesla collection credential_access discovery keylogger 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 12 IoCs

resource	yara_rule
behavioral2/memory/4320-1-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-9-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-25-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-23-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-22-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-20-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-17-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-16-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-14-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-12-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-11-0x0000000000580000-0x00000000005CC000-memory.dmp	family_agenttesla
behavioral2/memory/4320-10-0x0000000000580000-0x00000000005CC000-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-1-5-21-2629364133-3182087385-364449604-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	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
56	checkip.amazonaws.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 864 set thread context of 4320	864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe	87

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	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4320	RegAsm.exe
4320	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4320	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4320	RegAsm.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 4320	864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe	87
PID 864 wrote to memory of 4320	864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe	87
PID 864 wrote to memory of 4320	864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe	87
PID 864 wrote to memory of 4320	864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe	87
PID 864 wrote to memory of 4320	864	ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe	87

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ec546e1a4d7f40aeb07bb8ca59b5e2d6_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:864
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:4320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

5

T1552

Credentials In Files

4

T1552.001

Credentials in Registry

1

T1552.002

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/864-0-0x0000000000610000-0x0000000000611000-memory.dmp

Filesize
4KB

Download
memory/4320-1-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-6-0x0000000073E22000-0x0000000073E23000-memory.dmp

Filesize
4KB

Download
memory/4320-7-0x0000000073E20000-0x00000000743D1000-memory.dmp

Filesize
5.7MB

Download
memory/4320-8-0x0000000073E20000-0x00000000743D1000-memory.dmp

Filesize
5.7MB

Download
memory/4320-9-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-25-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-23-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-22-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-20-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-17-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-16-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-14-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-12-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-11-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-10-0x0000000000580000-0x00000000005CC000-memory.dmp

Filesize
304KB

Download
memory/4320-26-0x0000000073E22000-0x0000000073E23000-memory.dmp

Filesize
4KB

Download
memory/4320-27-0x0000000073E20000-0x00000000743D1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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