agenttesla | 06146002319e655ea5e677ffada926dce41e36c667cf17c3604069c87cf68420

General

Target

Invoices.scr
Size

642KB
MD5

7e1276e8a9605cceaeb2c92ee2dee098
SHA1

d2ff633768b6745d8e8f171d84c3aba4c2f1b92d
SHA256

e61b98aab63f89f2c11d138da7c42c20e5f5019a6063e4af547c7f2903cd133c
SHA512

ec534ea78f14507e2984e5a80a5d8cdeddfb99f96dd7c85f5ce3ad5269455fd1919cf60a922fc42610c716461ac46b8edaf364c0aa66d061305f26902fe46901

Score

10^/10

agenttesla collection evasion keylogger spyware stealer trojan

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
smtp.gmail.com
Port:
587
Username:
[email protected]
Password:
z123456789ok

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.gmail.com
Port:
587
Username:
[email protected]
Password:
z123456789ok

Signatures

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

AgentTesla Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4036-134-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Invoices.scr

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Invoices.scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Invoices.scr

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Invoices.scr

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	Invoices.scr

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

Invoices.scr

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Invoices.scr
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Invoices.scr

Suspicious use of SetThreadContext 1 IoCs

Processes:

Invoices.scr

description pid process target process

PID 2108 set thread context of 4036 2108 Invoices.scr MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4924 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Invoices.scrMSBuild.exe

pid process

2108 Invoices.scr
4036 MSBuild.exe
4036 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Invoices.scrMSBuild.exe

description pid process

Token: SeDebugPrivilege 2108 Invoices.scr
Token: SeDebugPrivilege 4036 MSBuild.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSBuild.exe

pid process

4036 MSBuild.exe

description	pid	process	target process
PID 2108 set thread context of 4036	2108	Invoices.scr	MSBuild.exe

pid	process
4924	schtasks.exe

pid	process
2108	Invoices.scr
4036	MSBuild.exe
4036	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	2108	Invoices.scr
Token: SeDebugPrivilege	4036	MSBuild.exe

pid	process
4036	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

Invoices.scr

description	pid	process	target process
PID 2108 wrote to memory of 4924	2108	Invoices.scr	schtasks.exe
PID 2108 wrote to memory of 4924	2108	Invoices.scr	schtasks.exe
PID 2108 wrote to memory of 4924	2108	Invoices.scr	schtasks.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe
PID 2108 wrote to memory of 4036	2108	Invoices.scr	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Invoices.scr
"C:\Users\Admin\AppData\Local\Temp\Invoices.scr" /S
1⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2108

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZDNxwnC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8146.tmp"
2⤵
- Creates scheduled task(s)
PID:4924

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:4036

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

4

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8146.tmp
Filesize
1KB

MD5
7dac9f1fce63bae14ff1a84ac2757faf

SHA1
52377485ca22ba1cbba024a22bfb7d92af0bd5cb

SHA256
565b08aed8642c0696141adff8e7a3566a42947e57ac59cd93f6912655a98817

SHA512
fbe7e3d851cd348888c3f9ee9f0b8d933811a33c142e97f10d5713e1afa390a702ec8ff9054696f06c0d109c5fe744c331afac1dab8bc07afd7c0cca4d198a13

Download Submit
memory/2108-130-0x0000000074F90000-0x0000000075541000-memory.dmp

Filesize
5.7MB

Download
memory/4036-133-0x0000000000000000-mapping.dmp

Download
memory/4036-134-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/4036-135-0x0000000074F90000-0x0000000075541000-memory.dmp

Filesize
5.7MB

Download
memory/4924-131-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads