agenttesla | c93b2e5437769a30e512a711ca27632b529736967d1c07b5b497eb9944f70374

General

Target

NYRNC200420511_FreightArrival.exe
Size

446KB
MD5

4e94b9a3025122a9949b79b37eeb3cff
SHA1

a298bbb92765a40d6229da48b5c6c0edbc70f510
SHA256

cb2792644a81d965b332d8d165e1e6f75894b43942a33d7e367f9b3a36d4a2bf
SHA512

8551ea40aa3ee4dfc119b4560bee1c6a501be24b53f209e6b1672902b37a063cdd859822ba5793383ef679364fadc672b03c5752915f5404c75be74bef6678f3

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 2 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/1656-54-0x0000000001300000-0x0000000001376000-memory.dmp	coreentity
behavioral1/memory/1656-56-0x0000000000C80000-0x0000000000C88000-memory.dmp	coreentity

AgentTesla Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1244-64-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1244-63-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1244-65-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1244-66-0x000000000044C8DE-mapping.dmp	family_agenttesla
behavioral1/memory/1244-70-0x0000000000400000-0x0000000000452000-memory.dmp	family_agenttesla
behavioral1/memory/1244-68-0x0000000000400000-0x0000000000452000-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/1656-57-0x0000000004780000-0x00000000047D8000-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:

NYRNC200420511_FreightArrival.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	NYRNC200420511_FreightArrival.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	NYRNC200420511_FreightArrival.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:

NYRNC200420511_FreightArrival.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	NYRNC200420511_FreightArrival.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	NYRNC200420511_FreightArrival.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	NYRNC200420511_FreightArrival.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:

NYRNC200420511_FreightArrival.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	NYRNC200420511_FreightArrival.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	NYRNC200420511_FreightArrival.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

NYRNC200420511_FreightArrival.exe

description pid process target process

PID 1656 set thread context of 1244 1656 NYRNC200420511_FreightArrival.exe NYRNC200420511_FreightArrival.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

940 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

NYRNC200420511_FreightArrival.exeNYRNC200420511_FreightArrival.exe

pid process

1656 NYRNC200420511_FreightArrival.exe
1244 NYRNC200420511_FreightArrival.exe
1244 NYRNC200420511_FreightArrival.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

NYRNC200420511_FreightArrival.exeNYRNC200420511_FreightArrival.exe

description pid process

Token: SeDebugPrivilege 1656 NYRNC200420511_FreightArrival.exe
Token: SeDebugPrivilege 1244 NYRNC200420511_FreightArrival.exe

description	pid	process	target process
PID 1656 set thread context of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe

pid	process
940	schtasks.exe

pid	process
1656	NYRNC200420511_FreightArrival.exe
1244	NYRNC200420511_FreightArrival.exe
1244	NYRNC200420511_FreightArrival.exe

description	pid	process
Token: SeDebugPrivilege	1656	NYRNC200420511_FreightArrival.exe
Token: SeDebugPrivilege	1244	NYRNC200420511_FreightArrival.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

NYRNC200420511_FreightArrival.exeNYRNC200420511_FreightArrival.exe

description	pid	process	target process
PID 1656 wrote to memory of 940	1656	NYRNC200420511_FreightArrival.exe	schtasks.exe
PID 1656 wrote to memory of 940	1656	NYRNC200420511_FreightArrival.exe	schtasks.exe
PID 1656 wrote to memory of 940	1656	NYRNC200420511_FreightArrival.exe	schtasks.exe
PID 1656 wrote to memory of 940	1656	NYRNC200420511_FreightArrival.exe	schtasks.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1656 wrote to memory of 1244	1656	NYRNC200420511_FreightArrival.exe	NYRNC200420511_FreightArrival.exe
PID 1244 wrote to memory of 748	1244	NYRNC200420511_FreightArrival.exe	netsh.exe
PID 1244 wrote to memory of 748	1244	NYRNC200420511_FreightArrival.exe	netsh.exe
PID 1244 wrote to memory of 748	1244	NYRNC200420511_FreightArrival.exe	netsh.exe
PID 1244 wrote to memory of 748	1244	NYRNC200420511_FreightArrival.exe	netsh.exe

outlook_office_path 1 IoCs

Processes:

NYRNC200420511_FreightArrival.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	NYRNC200420511_FreightArrival.exe

outlook_win_path 1 IoCs

Processes:

NYRNC200420511_FreightArrival.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	NYRNC200420511_FreightArrival.exe

C:\Users\Admin\AppData\Local\Temp\NYRNC200420511_FreightArrival.exe
"C:\Users\Admin\AppData\Local\Temp\NYRNC200420511_FreightArrival.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:1656
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PldCGfbSGLnQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8122.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:940
- C:\Users\Admin\AppData\Local\Temp\NYRNC200420511_FreightArrival.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:1244
- - C:\Windows\SysWOW64\netsh.exe
    "netsh" wlan show profile
    3⤵
    PID:748

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\tmp8122.tmp

Filesize
1KB

MD5
887823c77259143e4f9574e1e4328368

SHA1
1e46c4039cefaacf9e8802aec63d56140d1f7e9c

SHA256
853f0fc3bd2a5a7b48e2360b53a70f9df553fa02c1f5965f401a350945db95a8

SHA512
bcad89ec70b56644a417ca65f30db694ec7834aaca026535984a27fcc0cf505dbc5d716f298e806d4330f8cabb837ed8f59013dbd164835569ad2b0bb8571ccd

Download Submit
memory/748-72-0x0000000000000000-mapping.dmp

Download
memory/940-58-0x0000000000000000-mapping.dmp

Download
memory/1244-63-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1244-60-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1244-61-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1244-64-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1244-65-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1244-66-0x000000000044C8DE-mapping.dmp

Download
memory/1244-70-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1244-68-0x0000000000400000-0x0000000000452000-memory.dmp

Filesize
328KB

Download
memory/1656-57-0x0000000004780000-0x00000000047D8000-memory.dmp

Filesize
352KB

Download
memory/1656-56-0x0000000000C80000-0x0000000000C88000-memory.dmp

Filesize
32KB

Download
memory/1656-54-0x0000000001300000-0x0000000001376000-memory.dmp

Filesize
472KB

Download
memory/1656-55-0x00000000765C1000-0x00000000765C3000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads