agenttesla | 06146002319e655ea5e677ffada926dce41e36c667cf17c3604069c87cf68420

General

Target

Invoices.scr
Size

642KB
MD5

7e1276e8a9605cceaeb2c92ee2dee098
SHA1

d2ff633768b6745d8e8f171d84c3aba4c2f1b92d
SHA256

e61b98aab63f89f2c11d138da7c42c20e5f5019a6063e4af547c7f2903cd133c
SHA512

ec534ea78f14507e2984e5a80a5d8cdeddfb99f96dd7c85f5ce3ad5269455fd1919cf60a922fc42610c716461ac46b8edaf364c0aa66d061305f26902fe46901

Score

10^/10

agenttesla collection evasion keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.gmail.com
Port:
587
Username:
[email protected]
Password:
z123456789ok

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/1176-61-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1176-62-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1176-63-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1176-64-0x000000000045449E-mapping.dmp	family_agenttesla
behavioral1/memory/1176-66-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla
behavioral1/memory/1176-68-0x0000000000400000-0x000000000045A000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497
Looks for VMWare Tools registry key 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

Invoices.scr

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Invoices.scr
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Invoices.scr

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

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

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

Invoices.scr

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Invoices.scr
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Invoices.scr

Suspicious use of SetThreadContext 1 IoCs

Processes:

Invoices.scr

description pid process target process

PID 732 set thread context of 1176 732 Invoices.scr MSBuild.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

900 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Invoices.scrMSBuild.exe

pid process

732 Invoices.scr
1176 MSBuild.exe
1176 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Invoices.scrMSBuild.exe

description pid process

Token: SeDebugPrivilege 732 Invoices.scr
Token: SeDebugPrivilege 1176 MSBuild.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSBuild.exe

pid process

1176 MSBuild.exe

description	pid	process	target process
PID 732 set thread context of 1176	732	Invoices.scr	MSBuild.exe

pid	process
900	schtasks.exe

pid	process
732	Invoices.scr
1176	MSBuild.exe
1176	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	732	Invoices.scr
Token: SeDebugPrivilege	1176	MSBuild.exe

pid	process
1176	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Invoices.scr

description	pid	process	target process
PID 732 wrote to memory of 900	732	Invoices.scr	schtasks.exe
PID 732 wrote to memory of 900	732	Invoices.scr	schtasks.exe
PID 732 wrote to memory of 900	732	Invoices.scr	schtasks.exe
PID 732 wrote to memory of 900	732	Invoices.scr	schtasks.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe
PID 732 wrote to memory of 1176	732	Invoices.scr	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Invoices.scr
"C:\Users\Admin\AppData\Local\Temp\Invoices.scr" /S
1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:732

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZDNxwnC" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEF5F.tmp"
2⤵
- Creates scheduled task(s)
PID:900

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:1176

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

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpEF5F.tmp
Filesize
1KB

MD5
2a1de7745e93b19d3b439bce7deb8dd2

SHA1
2ed65149fb0e866465219734279407f822b1cd56

SHA256
4d66fabb5951bedbe4f7b6ee0efc11ee682f3d8b01006f28c3cc47ea90684fe4

SHA512
4b6e6cfba410056d60d159ca646a884adf10aab498a873e1b86dce33e3d3a5ebce32c7e0dc28eb2c4fe37bff2aad539d8d9ab71b927ad22bc4c6f702d49face5

Download Submit
memory/732-54-0x0000000076561000-0x0000000076563000-memory.dmp

Filesize
8KB

Download
memory/732-55-0x0000000074BD0000-0x000000007517B000-memory.dmp

Filesize
5.7MB

Download
memory/900-56-0x0000000000000000-mapping.dmp

Download
memory/1176-61-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-59-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-58-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-62-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-63-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-64-0x000000000045449E-mapping.dmp

Download
memory/1176-66-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-68-0x0000000000400000-0x000000000045A000-memory.dmp

Filesize
360KB

Download
memory/1176-70-0x0000000074BD0000-0x000000007517B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads