agenttesla | 84e8e0fb65510d250e5427aabab3dfd60c0562c60f13ed5e4fa8410fa216c53b

General

Target

RFQ.exe
Size

420KB
MD5

55ee586dd55c291e9829fe345028de76
SHA1

e1457c39c4412c5b7ab3f12767025177f0b6c03b
SHA256

ffd474ba42b484a0c7eb8688e37334d55e65c49dcb88dcf3bc542276cd7d5348
SHA512

fa5e1ebcd2573943da0c5926ae232333ec0c17536fdfafd5be0b675f5d569a27e7727ee44cab6c6bec27fc9a81dd6b09e90a6490242b296a00561fe78564f42f

Score

10^/10

agenttesla collection keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.yandex.ru
Port:
587
Username:
[email protected]
Password:
@jaffinmarknma@344

Signatures

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

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/836-62-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla
behavioral1/memory/836-63-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla
behavioral1/memory/836-65-0x0000000000445BBE-mapping.dmp	family_agenttesla
behavioral1/memory/836-64-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla
behavioral1/memory/836-67-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla
behavioral1/memory/836-69-0x0000000000400000-0x000000000044A000-memory.dmp	family_agenttesla

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/2020-56-0x0000000004C10000-0x0000000004C62000-memory.dmp	rezer0

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

Processes:

RFQ.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ.exe

description pid process target process

PID 2020 set thread context of 836 2020 RFQ.exe RFQ.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

1584 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

RFQ.exeRFQ.exe

pid process

2020 RFQ.exe
2020 RFQ.exe
2020 RFQ.exe
836 RFQ.exe
836 RFQ.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

RFQ.exeRFQ.exe

description pid process

Token: SeDebugPrivilege 2020 RFQ.exe
Token: SeDebugPrivilege 836 RFQ.exe

description	pid	process	target process
PID 2020 set thread context of 836	2020	RFQ.exe	RFQ.exe

pid	process
1584	schtasks.exe

pid	process
2020	RFQ.exe
2020	RFQ.exe
2020	RFQ.exe
836	RFQ.exe
836	RFQ.exe

description	pid	process
Token: SeDebugPrivilege	2020	RFQ.exe
Token: SeDebugPrivilege	836	RFQ.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

RFQ.exe

description	pid	process	target process
PID 2020 wrote to memory of 1584	2020	RFQ.exe	schtasks.exe
PID 2020 wrote to memory of 1584	2020	RFQ.exe	schtasks.exe
PID 2020 wrote to memory of 1584	2020	RFQ.exe	schtasks.exe
PID 2020 wrote to memory of 1584	2020	RFQ.exe	schtasks.exe
PID 2020 wrote to memory of 1636	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1636	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1636	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1636	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1588	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1588	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1588	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1588	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1208	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1208	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1208	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 1208	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe
PID 2020 wrote to memory of 836	2020	RFQ.exe	RFQ.exe

outlook_office_path 1 IoCs

Processes:

RFQ.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ.exe

outlook_win_path 1 IoCs

Processes:

RFQ.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RFQ.exe

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2020

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCZOTtFRHx" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4210.tmp"
2⤵
- Creates scheduled task(s)
PID:1584

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"{path}"
2⤵
PID:1636

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"{path}"
2⤵
PID:1588

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"{path}"
2⤵
PID:1208

C:\Users\Admin\AppData\Local\Temp\RFQ.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:836

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

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

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\Temp\tmp4210.tmp

Filesize
1KB

MD5
8f5560af5375e220c7f93d6af0e0f7f4

SHA1
988601865072e054c82703fba2a7662f8961345a

SHA256
1aa09122ef7edadbf64171b44914049155a345bc48945e1bd485cca0f5d8cce5

SHA512
e6199845eaf0c785795a79be23f81c77b7e471ff493da9320db4b3229b282e85951386f65f4e938b1adc4ae5f9dc649fb4f510f826eb9e1b34f42e991a93e37e

Download Submit
memory/836-65-0x0000000000445BBE-mapping.dmp

Download
memory/836-59-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-62-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-63-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-60-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-64-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-67-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-69-0x0000000000400000-0x000000000044A000-memory.dmp

Filesize
296KB

Download
memory/836-70-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download
memory/1584-57-0x0000000000000000-mapping.dmp

Download
memory/2020-56-0x0000000004C10000-0x0000000004C62000-memory.dmp

Filesize
328KB

Download
memory/2020-55-0x0000000000200000-0x0000000000212000-memory.dmp

Filesize
72KB

Download
memory/2020-54-0x00000000009E0000-0x0000000000A50000-memory.dmp

Filesize
448KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads