agenttesla | 78754a57a06bd7b5f2eaa2fbee3ef6ccfcf04dfc1500f9c1dff4f115f67c2929

General

Target

overdue invoice.pdf...exe
Size

539KB
MD5

fa0c9ce3695691566ec8fbba088433c6
SHA1

1b5693cbe7521087c8bb5b46a8706edb71b037a4
SHA256

93c807a2fb8dff5a30d9f860f1eb98304d8303f8fff4c53c98870201d6d3eb68
SHA512

b3bb49000f13d18163d685905384b7acbca9b165cc009b53830c7f567b5c9f762fb6c6d1c08036db774265c1048d3e62b6ca198253a37a8a5a19adcffac4c57a

Score

10^/10

agenttesla collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
mail.matrixas.in
Port:
587
Username:
[email protected]
Password:
info2013

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.matrixas.in
Port:
587
Username:
[email protected]
Password:
info2013

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/4484-137-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla

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:

overdue invoice.pdf...exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	overdue invoice.pdf...exe

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

Processes:

overdue invoice.pdf...exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	overdue invoice.pdf...exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	overdue invoice.pdf...exe
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	overdue invoice.pdf...exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

overdue invoice.pdf...exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\BAVLA = "C:\\Users\\Admin\\AppData\\Roaming\\BAVLA\\BAVLA.exe"	overdue invoice.pdf...exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

overdue invoice.pdf...exe

description pid process target process

PID 2632 set thread context of 4484 2632 overdue invoice.pdf...exe overdue invoice.pdf...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

2824 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

overdue invoice.pdf...exeoverdue invoice.pdf...exe

pid process

2632 overdue invoice.pdf...exe
4484 overdue invoice.pdf...exe
4484 overdue invoice.pdf...exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

overdue invoice.pdf...exeoverdue invoice.pdf...exe

description pid process

Token: SeDebugPrivilege 2632 overdue invoice.pdf...exe
Token: SeDebugPrivilege 4484 overdue invoice.pdf...exe

description	pid	process	target process
PID 2632 set thread context of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe

pid	process
2824	schtasks.exe

pid	process
2632	overdue invoice.pdf...exe
4484	overdue invoice.pdf...exe
4484	overdue invoice.pdf...exe

description	pid	process
Token: SeDebugPrivilege	2632	overdue invoice.pdf...exe
Token: SeDebugPrivilege	4484	overdue invoice.pdf...exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

overdue invoice.pdf...exe

description	pid	process	target process
PID 2632 wrote to memory of 2824	2632	overdue invoice.pdf...exe	schtasks.exe
PID 2632 wrote to memory of 2824	2632	overdue invoice.pdf...exe	schtasks.exe
PID 2632 wrote to memory of 2824	2632	overdue invoice.pdf...exe	schtasks.exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe
PID 2632 wrote to memory of 4484	2632	overdue invoice.pdf...exe	overdue invoice.pdf...exe

outlook_office_path 1 IoCs

Processes:

overdue invoice.pdf...exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	overdue invoice.pdf...exe

outlook_win_path 1 IoCs

Processes:

overdue invoice.pdf...exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	overdue invoice.pdf...exe

C:\Users\Admin\AppData\Local\Temp\overdue invoice.pdf...exe
"C:\Users\Admin\AppData\Local\Temp\overdue invoice.pdf...exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2632

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\zRCQEZ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC66D.tmp"
2⤵
- Creates scheduled task(s)
PID:2824

C:\Users\Admin\AppData\Local\Temp\overdue invoice.pdf...exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4484

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\overdue invoice.pdf...exe.log

Filesize
507B

MD5
76ffb2f33cb32ade8fc862a67599e9d8

SHA1
920cc4ab75b36d2f9f6e979b74db568973c49130

SHA256
f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310

SHA512
f33502c2e1bb30c05359bfc6819ca934642a1e01874e3060349127d792694d56ad22fccd6c9477b8ee50d66db35785779324273f509576b48b7f85577e001b4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC66D.tmp

Filesize
1KB

MD5
6150ecbd348919a0a83b058339014590

SHA1
b27a328394de96f0ad2f2638848a4f8fa0ccec92

SHA256
1158ff6d200d748de3268d80e77a9f707fc44da65df9ce15576f4bb0ec9d2fbd

SHA512
75a70e7eaf33d66ff1cdef570855ae238eaf3b08aa3470779ad782409f934cddf7270611abe4a3d1a764d4fd50cd35ffe5851a89853fb21a664d2f6a14bd93cc

Download Submit
memory/2632-130-0x00000000009C0000-0x0000000000A4E000-memory.dmp

Filesize
568KB

Download
memory/2632-131-0x0000000007E50000-0x00000000083F4000-memory.dmp

Filesize
5.6MB

Download
memory/2632-132-0x0000000007940000-0x00000000079D2000-memory.dmp

Filesize
584KB

Download
memory/2632-133-0x0000000007A80000-0x0000000007B1C000-memory.dmp

Filesize
624KB

Download
memory/2824-134-0x0000000000000000-mapping.dmp

Download
memory/4484-136-0x0000000000000000-mapping.dmp

Download
memory/4484-137-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/4484-139-0x0000000005C90000-0x0000000005CF6000-memory.dmp

Filesize
408KB

Download
memory/4484-140-0x0000000006150000-0x00000000061A0000-memory.dmp

Filesize
320KB

Download
memory/4484-141-0x00000000061E0000-0x00000000061EA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads