agenttesla | 358c99f5f11faa788a617eae44e7d676dfbf51ba3f1cc0348f03676f7ceea8ee

Analysis

max time kernel
138s
max time network
139s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 13:44

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General

Target

captured_malware/BuXTaVVWA5WdvtU.exe
Size

1.3MB
MD5

7c5e5f9ba055d8124f78cc32cd02d70f
SHA1

25a5bc05d8e3c60bdeb0161176be10c3ace478ff
SHA256

28e9c4ad5816632edc837be54ccb120cbb6206e888b6671bc3ab935f1684e203
SHA512

50e4b61a8bc70f12b438a37340d802997ea8c5874ddbe8b909def09d87e2c1433164ef78e37fbf1b18cc89dee7b0d4fddf1ada346a127ccd142e9e561e757e03
SSDEEP

24576:2tNS/d3bYdkadXVcZnGpBcJp8bjzC8IndPn+mwRGPoN7vdiTbnFM:SzlVcILc/8bjkF+m/PoiM

Score

10^/10

agenttesla collection credential_access discovery keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
webmail.worldlinkcolombo.net
Port:
587
Username:
[email protected]
Password:
FBF8TNIO60WI6615677789

Signatures

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

AgentTesla payload 5 IoCs

resource	yara_rule
behavioral17/memory/2840-16-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral17/memory/2840-20-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral17/memory/2840-18-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral17/memory/2840-13-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral17/memory/2840-12-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

resource	yara_rule
behavioral17/memory/2380-3-0x00000000002D0000-0x00000000002E2000-memory.dmp	CustAttr

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 3 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

Credentials from Web Browsers
T1555.003
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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2380 set thread context of 2840	2380	BuXTaVVWA5WdvtU.exe	31

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	BuXTaVVWA5WdvtU.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	BuXTaVVWA5WdvtU.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2840	BuXTaVVWA5WdvtU.exe
2840	BuXTaVVWA5WdvtU.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2840	BuXTaVVWA5WdvtU.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2840	BuXTaVVWA5WdvtU.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31
PID 2380 wrote to memory of 2840	2380	BuXTaVVWA5WdvtU.exe	31

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe

C:\Users\Admin\AppData\Local\Temp\captured_malware\BuXTaVVWA5WdvtU.exe
"C:\Users\Admin\AppData\Local\Temp\captured_malware\BuXTaVVWA5WdvtU.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Users\Admin\AppData\Local\Temp\captured_malware\BuXTaVVWA5WdvtU.exe
  "C:\Users\Admin\AppData\Local\Temp\captured_malware\BuXTaVVWA5WdvtU.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:2840

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

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Downloads

memory/2380-0-0x000000007413E000-0x000000007413F000-memory.dmp

Filesize
4KB

Download
memory/2380-1-0x0000000000C00000-0x0000000000D52000-memory.dmp

Filesize
1.3MB

Download
memory/2380-2-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2380-3-0x00000000002D0000-0x00000000002E2000-memory.dmp

Filesize
72KB

Download
memory/2380-4-0x000000007413E000-0x000000007413F000-memory.dmp

Filesize
4KB

Download
memory/2380-5-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2380-6-0x00000000059B0000-0x0000000005A4C000-memory.dmp

Filesize
624KB

Download
memory/2380-7-0x0000000000BC0000-0x0000000000BFC000-memory.dmp

Filesize
240KB

Download
memory/2380-21-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-16-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-8-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-20-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-18-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-13-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-12-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-10-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2840-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2840-22-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-23-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-24-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-25-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-26-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2840-27-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download