agenttesla | cf754ba143aca919dc53b8869d18ceb489014003092559062018193d6e0928bb

General

Target

Telex-23200205.exe
Size

280KB
MD5

f9e3b1d85896f808de50e1cfdfc37623
SHA1

4c976e4f29f55b071f9498d2773781acfdaa3cfc
SHA256

cf754ba143aca919dc53b8869d18ceb489014003092559062018193d6e0928bb
SHA512

d81eaeaa4819dd2bfba55defc9fbe337d864f311186db8ad3622011f180dc02c741c855cab558197e9e62a90abdc86a652aee0c4ac1676c25f5c1ec626889844
SSDEEP

6144:lI6kN4X+4hUWikAgqmb79dk/JVr84ZlYB4mJT4lE:lIIu4hLik8aM3g4IB424

Score

10^/10

agenttesla collection keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.thereccorp.com
Port:
587
Username:
[email protected]
Password:
O@123456
Email To:
[email protected]

Signatures

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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
3	api.ipify.org
4	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1972 set thread context of 1936	1972	Telex-23200205.exe	28

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1936	RegAsm.exe
1936	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28
PID 1972 wrote to memory of 1936	1972	Telex-23200205.exe	28

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3948302646-268491222-1934009652-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\Telex-23200205.exe
"C:\Users\Admin\AppData\Local\Temp\Telex-23200205.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1972
- 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
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1936

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1936-63-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-60-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-92-0x0000000001140000-0x0000000001180000-memory.dmp

Filesize
256KB

Download
memory/1936-68-0x0000000001140000-0x0000000001180000-memory.dmp

Filesize
256KB

Download
memory/1936-58-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-59-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-67-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-61-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-65-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1936-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1972-54-0x0000000000B10000-0x0000000000B5C000-memory.dmp

Filesize
304KB

Download
memory/1972-55-0x0000000000480000-0x00000000004C8000-memory.dmp

Filesize
288KB

Download
memory/1972-57-0x0000000004A90000-0x0000000004AD0000-memory.dmp

Filesize
256KB

Download
memory/1972-56-0x00000000003E0000-0x00000000003EA000-memory.dmp

Filesize
40KB

Download

Analysis

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