agenttesla | 26f5f239c823689bf255c4ecf37f085a6540c9fe9951fb4bca4484f1caadcbd7

General

Target

Arrival551132_XGG1635006pdf.exe
Size

722KB
MD5

0f9420abd956257bc58cd6dda5097b66
SHA1

488a0500f179f9dc3d4a6f81a03e4c1355fc036e
SHA256

9003935bc497446d14818f11d156c3cd52a891c394ed13d544e30c6dafff1e2a
SHA512

7f912af19c1da438e13188c9710519d5814798531b857086d71edae9451dc5760cc3e71fc4d06b9c3811894f8ca21d8fba917e6a800cdf31214613b73fa9c972

Score

10^/10

agenttesla collection coreentity evasion keylogger rezer0 spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.karmachalets.co.in
Port:
587
Username:
[email protected]
Password:
Akshya@123

Signatures

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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/912-56-0x00000000004C0000-0x00000000004C8000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/748-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/748-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/748-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/748-68-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/748-66-0x000000000044C8DE-mapping.dmp	family_agenttesla
behavioral1/memory/748-70-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla

Looks for VirtualBox Guest Additions in registry 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

ReZer0 packer 1 IoCs

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

rezer0

Processes:

resource	yara_rule
behavioral1/memory/912-57-0x0000000001380000-0x00000000013D8000-memory.dmp	rezer0

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:

Arrival551132_XGG1635006pdf.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Arrival551132_XGG1635006pdf.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Arrival551132_XGG1635006pdf.exe

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:

Arrival551132_XGG1635006pdf.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	Arrival551132_XGG1635006pdf.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Arrival551132_XGG1635006pdf.exe
Key opened	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Arrival551132_XGG1635006pdf.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:

Arrival551132_XGG1635006pdf.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Arrival551132_XGG1635006pdf.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Arrival551132_XGG1635006pdf.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Arrival551132_XGG1635006pdf.exe

description pid process target process

PID 912 set thread context of 748 912 Arrival551132_XGG1635006pdf.exe Arrival551132_XGG1635006pdf.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

2020 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

Arrival551132_XGG1635006pdf.exeArrival551132_XGG1635006pdf.exe

pid process

912 Arrival551132_XGG1635006pdf.exe
748 Arrival551132_XGG1635006pdf.exe
748 Arrival551132_XGG1635006pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Arrival551132_XGG1635006pdf.exeArrival551132_XGG1635006pdf.exe

description pid process

Token: SeDebugPrivilege 912 Arrival551132_XGG1635006pdf.exe
Token: SeDebugPrivilege 748 Arrival551132_XGG1635006pdf.exe

description	pid	process	target process
PID 912 set thread context of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe

pid	process
2020	schtasks.exe

pid	process
912	Arrival551132_XGG1635006pdf.exe
748	Arrival551132_XGG1635006pdf.exe
748	Arrival551132_XGG1635006pdf.exe

description	pid	process
Token: SeDebugPrivilege	912	Arrival551132_XGG1635006pdf.exe
Token: SeDebugPrivilege	748	Arrival551132_XGG1635006pdf.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

Arrival551132_XGG1635006pdf.exeArrival551132_XGG1635006pdf.exe

description	pid	process	target process
PID 912 wrote to memory of 2020	912	Arrival551132_XGG1635006pdf.exe	schtasks.exe
PID 912 wrote to memory of 2020	912	Arrival551132_XGG1635006pdf.exe	schtasks.exe
PID 912 wrote to memory of 2020	912	Arrival551132_XGG1635006pdf.exe	schtasks.exe
PID 912 wrote to memory of 2020	912	Arrival551132_XGG1635006pdf.exe	schtasks.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 912 wrote to memory of 748	912	Arrival551132_XGG1635006pdf.exe	Arrival551132_XGG1635006pdf.exe
PID 748 wrote to memory of 1992	748	Arrival551132_XGG1635006pdf.exe	netsh.exe
PID 748 wrote to memory of 1992	748	Arrival551132_XGG1635006pdf.exe	netsh.exe
PID 748 wrote to memory of 1992	748	Arrival551132_XGG1635006pdf.exe	netsh.exe
PID 748 wrote to memory of 1992	748	Arrival551132_XGG1635006pdf.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

Arrival551132_XGG1635006pdf.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	Arrival551132_XGG1635006pdf.exe

outlook_win_path 1 IoCs

Processes:

Arrival551132_XGG1635006pdf.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	Arrival551132_XGG1635006pdf.exe

C:\Users\Admin\AppData\Local\Temp\Arrival551132_XGG1635006pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Arrival551132_XGG1635006pdf.exe"
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:912

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\iIVegojK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6308.tmp"
2⤵
- Creates scheduled task(s)
PID:2020

C:\Users\Admin\AppData\Local\Temp\Arrival551132_XGG1635006pdf.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:748

C:\Windows\SysWOW64\netsh.exe
"netsh" wlan show profile
3⤵
PID:1992

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

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Credentials in Files

3

T1081

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

2

T1497

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\tmp6308.tmp

Filesize
1KB

MD5
d961c9a36bad4a9336432c4ac04a2916

SHA1
e2ba8fe38ad0c102699e7c85411322cf7e466483

SHA256
957358e3943f229348291e525b4d77fc0faeea5f48ed45e20ae737dddeb941a3

SHA512
971dff379d911a7aca699abda5f06dd551720d841352865cde828bc95275df962b8b5871caa21c8ca568e40a16cd9a61c16374f86e88928c6817133e846787a3

Download Submit
memory/748-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/748-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/748-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/748-66-0x000000000044C8DE-mapping.dmp

Download
memory/748-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/748-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/748-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/748-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/912-54-0x00000000013E0000-0x000000000149A000-memory.dmp

Filesize
744KB

Download
memory/912-55-0x0000000075E31000-0x0000000075E33000-memory.dmp

Filesize
8KB

Download
memory/912-56-0x00000000004C0000-0x00000000004C8000-memory.dmp

Filesize
32KB

Download
memory/912-57-0x0000000001380000-0x00000000013D8000-memory.dmp

Filesize
352KB

Download
memory/1992-72-0x0000000000000000-mapping.dmp

Download
memory/2020-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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