agenttesla | 358c99f5f11faa788a617eae44e7d676dfbf51ba3f1cc0348f03676f7ceea8ee

Analysis

max time kernel
139s
max time network
181s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
21-11-2024 20:41

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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 1 IoCs

resource	yara_rule
behavioral18/memory/3556-13-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

CustAttr .NET packer 1 IoCs

Detects CustAttr .NET packer in memory.

resource	yara_rule
behavioral18/memory/5024-8-0x00000000056B0000-0x00000000056C2000-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-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5024 set thread context of 3556	5024	BuXTaVVWA5WdvtU.exe	96

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
3556	BuXTaVVWA5WdvtU.exe
3556	BuXTaVVWA5WdvtU.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3556	BuXTaVVWA5WdvtU.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3556	BuXTaVVWA5WdvtU.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96
PID 5024 wrote to memory of 3556	5024	BuXTaVVWA5WdvtU.exe	96

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	BuXTaVVWA5WdvtU.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\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:5024
- 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:3556

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

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\BuXTaVVWA5WdvtU.exe.log

Filesize
1KB

MD5
17573558c4e714f606f997e5157afaac

SHA1
13e16e9415ceef429aaf124139671ebeca09ed23

SHA256
c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

SHA512
f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

Download Submit
memory/3556-13-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/3556-25-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/3556-24-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/3556-23-0x0000000006E90000-0x0000000006EE0000-memory.dmp

Filesize
320KB

Download
memory/3556-22-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/3556-21-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/3556-20-0x0000000005F10000-0x0000000005F76000-memory.dmp

Filesize
408KB

Download
memory/3556-19-0x0000000005990000-0x00000000059A8000-memory.dmp

Filesize
96KB

Download
memory/3556-18-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/3556-16-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/5024-6-0x00000000056D0000-0x0000000005726000-memory.dmp

Filesize
344KB

Download
memory/5024-7-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/5024-11-0x0000000007020000-0x00000000070BC000-memory.dmp

Filesize
624KB

Download
memory/5024-10-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/5024-9-0x0000000074A4E000-0x0000000074A4F000-memory.dmp

Filesize
4KB

Download
memory/5024-17-0x0000000074A40000-0x00000000751F0000-memory.dmp

Filesize
7.7MB

Download
memory/5024-8-0x00000000056B0000-0x00000000056C2000-memory.dmp

Filesize
72KB

Download
memory/5024-12-0x0000000006E20000-0x0000000006E5C000-memory.dmp

Filesize
240KB

Download
memory/5024-0-0x0000000074A4E000-0x0000000074A4F000-memory.dmp

Filesize
4KB

Download
memory/5024-5-0x0000000005430000-0x000000000543A000-memory.dmp

Filesize
40KB

Download
memory/5024-4-0x00000000054B0000-0x0000000005542000-memory.dmp

Filesize
584KB

Download
memory/5024-3-0x00000000059C0000-0x0000000005F64000-memory.dmp

Filesize
5.6MB

Download
memory/5024-2-0x0000000005320000-0x00000000053BC000-memory.dmp

Filesize
624KB

Download
memory/5024-1-0x0000000000840000-0x0000000000992000-memory.dmp

Filesize
1.3MB

Download