agenttesla | 4c886afcf091e440b12ade502e4b8dcd2e9995cb2c10d7c0f8fd16e736d6fca6

General

Target

RFQ 342 W-Heavy.exe
Size

499KB
MD5

76bb8d3cf1b086d5217c9c8872187821
SHA1

6dd66e7fb11a8aeafba22d63c1c17a2b6d8cbea4
SHA256

4c886afcf091e440b12ade502e4b8dcd2e9995cb2c10d7c0f8fd16e736d6fca6
SHA512

282a847853e0fff60bc79afd2f44ae099112093e7fe5f9d779ad333c2a9807ea0619a04f02c957fae815d16e0639f3b20e99e9639e9062863e4341c1ac3f5327

Score

10^/10

agenttesla evasion keylogger persistence rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.sridurgaagros.com
Port:
587
Username:
bestlog@sridurgaagros.com
Password:
@Hammer75

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

AgentTesla Payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/912-45-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/912-46-0x000000000044B05E-mapping.dmp	family_agenttesla
behavioral1/memory/912-47-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral1/memory/912-48-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1588-4-0x0000000005240000-0x0000000005292000-memory.dmp	rezer0

Drops file in Drivers directory 1 IoCs

Processes:

RFQ 342 W-Heavy.exe

description ioc process

File opened for modification C:\Windows\system32\drivers\etc\hosts RFQ 342 W-Heavy.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

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

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

Data from Local System
T1005

Credentials in Files
T1081

description	ioc	process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	RFQ 342 W-Heavy.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

RFQ 342 W-Heavy.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	RFQ 342 W-Heavy.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	RFQ 342 W-Heavy.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RFQ 342 W-Heavy.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\ARevKB = "C:\\Users\\Admin\\AppData\\Roaming\\ARevKB\\ARevKB.exe"	RFQ 342 W-Heavy.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

RFQ 342 W-Heavy.exe

description pid process target process

PID 1588 set thread context of 912 1588 RFQ 342 W-Heavy.exe RFQ 342 W-Heavy.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

1224 schtasks.exe
Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exeRFQ 342 W-Heavy.exeRFQ 342 W-Heavy.exe

pid process

1500 powershell.exe
1500 powershell.exe
1588 RFQ 342 W-Heavy.exe
912 RFQ 342 W-Heavy.exe
912 RFQ 342 W-Heavy.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

RFQ 342 W-Heavy.exe

pid process

912 RFQ 342 W-Heavy.exe

description	pid	process	target process
PID 1588 set thread context of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe

pid	process
1224	schtasks.exe

pid	process
1500	powershell.exe
1500	powershell.exe
1588	RFQ 342 W-Heavy.exe
912	RFQ 342 W-Heavy.exe
912	RFQ 342 W-Heavy.exe

pid	process
912	RFQ 342 W-Heavy.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exeRFQ 342 W-Heavy.exeRFQ 342 W-Heavy.exe

description	pid	process
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	1588	RFQ 342 W-Heavy.exe
Token: SeDebugPrivilege	912	RFQ 342 W-Heavy.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RFQ 342 W-Heavy.exe

pid process

912 RFQ 342 W-Heavy.exe

pid	process
912	RFQ 342 W-Heavy.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

RFQ 342 W-Heavy.exeRFQ 342 W-Heavy.exe

description	pid	process	target process
PID 1588 wrote to memory of 1500	1588	RFQ 342 W-Heavy.exe	powershell.exe
PID 1588 wrote to memory of 1500	1588	RFQ 342 W-Heavy.exe	powershell.exe
PID 1588 wrote to memory of 1500	1588	RFQ 342 W-Heavy.exe	powershell.exe
PID 1588 wrote to memory of 1500	1588	RFQ 342 W-Heavy.exe	powershell.exe
PID 1588 wrote to memory of 1224	1588	RFQ 342 W-Heavy.exe	schtasks.exe
PID 1588 wrote to memory of 1224	1588	RFQ 342 W-Heavy.exe	schtasks.exe
PID 1588 wrote to memory of 1224	1588	RFQ 342 W-Heavy.exe	schtasks.exe
PID 1588 wrote to memory of 1224	1588	RFQ 342 W-Heavy.exe	schtasks.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 1588 wrote to memory of 912	1588	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 912 wrote to memory of 2016	912	RFQ 342 W-Heavy.exe	netsh.exe
PID 912 wrote to memory of 2016	912	RFQ 342 W-Heavy.exe	netsh.exe
PID 912 wrote to memory of 2016	912	RFQ 342 W-Heavy.exe	netsh.exe
PID 912 wrote to memory of 2016	912	RFQ 342 W-Heavy.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\RFQ 342 W-Heavy.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ 342 W-Heavy.exe"
1⤵
- Windows security modification
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1588

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1500

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ykbVJGg" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1FA1.tmp"
2⤵
- Creates scheduled task(s)
PID:1224

C:\Users\Admin\AppData\Local\Temp\RFQ 342 W-Heavy.exe
"{path}"
2⤵
- Drops file in Drivers directory
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:912

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:2016

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

3

T1112

Disabling Security Tools

2

T1089

Credential Access

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp1FA1.tmp
MD5
806836e2da82d550acda6dadf265f10c

SHA1
786e097250aab0e2a4232a4ef8d205b968a80261

SHA256
d006c897b7eb02f9a241b62bd91722977ddaafa0f072ab4701f15a8d6191d895

SHA512
9753489d32f0801f6bdbbc16ae2ee69bc583bc3860af9704efcd9a23ed1d2b3671b13b3d3dd6b21970a6abc52b2fbe3b9fa2fd88dedddc6f86e04a43d564b38e

Download Submit
memory/912-49-0x0000000074670000-0x0000000074D5E000-memory.dmp

Filesize
6.9MB

Download
memory/912-48-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/912-47-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/912-46-0x000000000044B05E-mapping.dmp

Download
memory/912-45-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1224-43-0x0000000000000000-mapping.dmp

Download
memory/1500-7-0x0000000000AC0000-0x0000000000AC1000-memory.dmp

Filesize
4KB

Download
memory/1500-42-0x0000000006330000-0x0000000006331000-memory.dmp

Filesize
4KB

Download
memory/1500-10-0x0000000005260000-0x0000000005261000-memory.dmp

Filesize
4KB

Download
memory/1500-13-0x0000000005690000-0x0000000005691000-memory.dmp

Filesize
4KB

Download
memory/1500-18-0x00000000060E0000-0x00000000060E1000-memory.dmp

Filesize
4KB

Download
memory/1500-19-0x0000000006110000-0x0000000006111000-memory.dmp

Filesize
4KB

Download
memory/1500-26-0x00000000062A0000-0x00000000062A1000-memory.dmp

Filesize
4KB

Download
memory/1500-27-0x00000000055F0000-0x00000000055F1000-memory.dmp

Filesize
4KB

Download
memory/1500-41-0x0000000006320000-0x0000000006321000-memory.dmp

Filesize
4KB

Download
memory/1500-9-0x0000000002450000-0x0000000002451000-memory.dmp

Filesize
4KB

Download
memory/1500-8-0x0000000004840000-0x0000000004841000-memory.dmp

Filesize
4KB

Download
memory/1500-5-0x0000000000000000-mapping.dmp

Download
memory/1500-6-0x0000000074670000-0x0000000074D5E000-memory.dmp

Filesize
6.9MB

Download
memory/1588-0-0x0000000074670000-0x0000000074D5E000-memory.dmp

Filesize
6.9MB

Download
memory/1588-4-0x0000000005240000-0x0000000005292000-memory.dmp

Filesize
328KB

Download
memory/1588-3-0x0000000000530000-0x0000000000533000-memory.dmp

Filesize
12KB

Download
memory/1588-1-0x0000000001220000-0x0000000001221000-memory.dmp

Filesize
4KB

Download
memory/2016-52-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads