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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2104-37-0x0000000000400000-0x0000000000450000-memory.dmp	family_agenttesla
behavioral2/memory/2104-38-0x000000000044B05E-mapping.dmp	family_agenttesla

rezer0 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral2/memory/656-8-0x00000000072C0000-0x0000000007312000-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
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	RFQ 342 W-Heavy.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	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-1-5-21-1985363256-3005190890-1182679451-1000\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 656 set thread context of 2104 656 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

812 schtasks.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

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

pid process

3760 powershell.exe
3760 powershell.exe
3760 powershell.exe
656 RFQ 342 W-Heavy.exe
2104 RFQ 342 W-Heavy.exe
2104 RFQ 342 W-Heavy.exe
Suspicious behavior: RenamesItself 1 IoCs

Processes:

RFQ 342 W-Heavy.exe

pid process

2104 RFQ 342 W-Heavy.exe

description	pid	process	target process
PID 656 set thread context of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe

pid	process
812	schtasks.exe

pid	process
3760	powershell.exe
3760	powershell.exe
3760	powershell.exe
656	RFQ 342 W-Heavy.exe
2104	RFQ 342 W-Heavy.exe
2104	RFQ 342 W-Heavy.exe

pid	process
2104	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	3760	powershell.exe
Token: SeDebugPrivilege	656	RFQ 342 W-Heavy.exe
Token: SeDebugPrivilege	2104	RFQ 342 W-Heavy.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RFQ 342 W-Heavy.exe

pid process

2104 RFQ 342 W-Heavy.exe

pid	process
2104	RFQ 342 W-Heavy.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

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

description	pid	process	target process
PID 656 wrote to memory of 3760	656	RFQ 342 W-Heavy.exe	powershell.exe
PID 656 wrote to memory of 3760	656	RFQ 342 W-Heavy.exe	powershell.exe
PID 656 wrote to memory of 3760	656	RFQ 342 W-Heavy.exe	powershell.exe
PID 656 wrote to memory of 812	656	RFQ 342 W-Heavy.exe	schtasks.exe
PID 656 wrote to memory of 812	656	RFQ 342 W-Heavy.exe	schtasks.exe
PID 656 wrote to memory of 812	656	RFQ 342 W-Heavy.exe	schtasks.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 656 wrote to memory of 2104	656	RFQ 342 W-Heavy.exe	RFQ 342 W-Heavy.exe
PID 2104 wrote to memory of 1028	2104	RFQ 342 W-Heavy.exe	netsh.exe
PID 2104 wrote to memory of 1028	2104	RFQ 342 W-Heavy.exe	netsh.exe
PID 2104 wrote to memory of 1028	2104	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:656

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell" Get-MpPreference -verbose
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3760

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ykbVJGg" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC7BA.tmp"
2⤵
- Creates scheduled task(s)
PID:812

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:2104

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1028

Network

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\Microsoft\CLR_v4.0_32\UsageLogs\RFQ 342 W-Heavy.exe.log
MD5
0c2899d7c6746f42d5bbe088c777f94c

SHA1
622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1

SHA256
5b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458

SHA512
ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC7BA.tmp
MD5
6fe8f445dd44ba80c21334f9256dda73

SHA1
e064a597289c7b0eabad2332c86d2cc2ccbfac48

SHA256
f049c5e6143fe9514076e97484116da46f25ee2b0b807495d5ae5fe8491b340e

SHA512
4b0b43b921e6f15b0c83c157706ebfb273cd9454c057b296ec7d30fb27b87d9112dd33297814a52166361362fbd01a81269a5eecd2a3f95cd8961502011eb131

Download Submit
memory/656-1-0x0000000000380000-0x0000000000381000-memory.dmp

Filesize
4KB

Download
memory/656-3-0x0000000005120000-0x0000000005121000-memory.dmp

Filesize
4KB

Download
memory/656-4-0x0000000004CC0000-0x0000000004CC1000-memory.dmp

Filesize
4KB

Download
memory/656-5-0x0000000004C50000-0x0000000004C51000-memory.dmp

Filesize
4KB

Download
memory/656-6-0x0000000004DD0000-0x0000000004DD3000-memory.dmp

Filesize
12KB

Download
memory/656-7-0x0000000007120000-0x0000000007121000-memory.dmp

Filesize
4KB

Download
memory/656-8-0x00000000072C0000-0x0000000007312000-memory.dmp

Filesize
328KB

Download
memory/656-0-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/812-35-0x0000000000000000-mapping.dmp

Download
memory/1028-47-0x0000000000000000-mapping.dmp

Download
memory/2104-38-0x000000000044B05E-mapping.dmp

Download
memory/2104-37-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/2104-40-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/2104-45-0x0000000005A20000-0x0000000005A21000-memory.dmp

Filesize
4KB

Download
memory/3760-17-0x00000000067A0000-0x00000000067A1000-memory.dmp

Filesize
4KB

Download
memory/3760-16-0x00000000075C0000-0x00000000075C1000-memory.dmp

Filesize
4KB

Download
memory/3760-19-0x0000000007C20000-0x0000000007C21000-memory.dmp

Filesize
4KB

Download
memory/3760-21-0x0000000008C70000-0x0000000008CA3000-memory.dmp

Filesize
204KB

Download
memory/3760-28-0x0000000008C30000-0x0000000008C31000-memory.dmp

Filesize
4KB

Download
memory/3760-29-0x0000000008DA0000-0x0000000008DA1000-memory.dmp

Filesize
4KB

Download
memory/3760-30-0x0000000008F70000-0x0000000008F71000-memory.dmp

Filesize
4KB

Download
memory/3760-31-0x0000000008E80000-0x0000000008E81000-memory.dmp

Filesize
4KB

Download
memory/3760-33-0x0000000008E70000-0x0000000008E71000-memory.dmp

Filesize
4KB

Download
memory/3760-18-0x0000000007D40000-0x0000000007D41000-memory.dmp

Filesize
4KB

Download
memory/3760-15-0x0000000007550000-0x0000000007551000-memory.dmp

Filesize
4KB

Download
memory/3760-14-0x0000000007470000-0x0000000007471000-memory.dmp

Filesize
4KB

Download
memory/3760-13-0x0000000006B60000-0x0000000006B61000-memory.dmp

Filesize
4KB

Download
memory/3760-12-0x0000000006BF0000-0x0000000006BF1000-memory.dmp

Filesize
4KB

Download
memory/3760-11-0x0000000006530000-0x0000000006531000-memory.dmp

Filesize
4KB

Download
memory/3760-10-0x0000000074070000-0x000000007475E000-memory.dmp

Filesize
6.9MB

Download
memory/3760-9-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads