agenttesla | 19bd376d4febdfc512a5e1242c79a9a0e2b77c007a09ae07b05a656957a42618

General

Target

Purchase Order.exe
Size

601KB
MD5

8b622390bd7c3a881878b740857c506b
SHA1

2f683c3dd410f542383eebfaa033dc3c47d1afec
SHA256

7a53181aa1e3f435bf2036ddff15a7e8e3382bfceade53abd9f3a6e14ed2cf5b
SHA512

73df2a62e0f389f4bcbae6b012ea0ba82bcc335a21746efcfd9f34d0d712249a743ea78d845e8d08abbf492ceb8471135af98489a2857630d8c5d3f60691a83b

Score

10^/10

agenttesla collection evasion keylogger persistence spyware stealer trojan

Malware Config

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/896-62-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/896-61-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/896-63-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/896-64-0x00000000004609CE-mapping.dmp	family_agenttesla
behavioral1/memory/896-66-0x0000000000400000-0x0000000000466000-memory.dmp	family_agenttesla
behavioral1/memory/896-68-0x0000000000400000-0x0000000000466000-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:

Purchase Order.exe

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

Purchase Order.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	Purchase Order.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchase Order.exe
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Purchase Order.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Purchase Order.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\appdata = "C:\\Users\\Admin\\AppData\\Roaming\\appdata\\appdata.exe"	Purchase Order.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:

Purchase Order.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

Purchase Order.exe

description pid process target process

PID 1912 set thread context of 896 1912 Purchase Order.exe Purchase Order.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

596 schtasks.exe

description	pid	process	target process
PID 1912 set thread context of 896	1912	Purchase Order.exe	Purchase Order.exe

pid	process
596	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

Purchase Order.exePurchase Order.exe

pid	process
1912	Purchase Order.exe
1912	Purchase Order.exe
1912	Purchase Order.exe
1912	Purchase Order.exe
1912	Purchase Order.exe
896	Purchase Order.exe
896	Purchase Order.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Purchase Order.exePurchase Order.exe

description pid process

Token: SeDebugPrivilege 1912 Purchase Order.exe
Token: SeDebugPrivilege 896 Purchase Order.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Purchase Order.exe

pid process

896 Purchase Order.exe

description	pid	process
Token: SeDebugPrivilege	1912	Purchase Order.exe
Token: SeDebugPrivilege	896	Purchase Order.exe

pid	process
896	Purchase Order.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

Purchase Order.exe

description	pid	process	target process
PID 1912 wrote to memory of 596	1912	Purchase Order.exe	schtasks.exe
PID 1912 wrote to memory of 596	1912	Purchase Order.exe	schtasks.exe
PID 1912 wrote to memory of 596	1912	Purchase Order.exe	schtasks.exe
PID 1912 wrote to memory of 596	1912	Purchase Order.exe	schtasks.exe
PID 1912 wrote to memory of 1176	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 1176	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 1176	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 1176	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 700	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 700	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 700	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 700	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe
PID 1912 wrote to memory of 896	1912	Purchase Order.exe	Purchase Order.exe

outlook_office_path 1 IoCs

Processes:

Purchase Order.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	Purchase Order.exe

outlook_win_path 1 IoCs

Processes:

Purchase Order.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	Purchase Order.exe

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase Order.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:1912

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YnvUZE" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6B13.tmp"
2⤵
- Creates scheduled task(s)
PID:596

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"{path}"
2⤵
PID:1176

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"{path}"
2⤵
PID:700

C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
"{path}"
2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:896

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

1

T1060

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

4

T1012

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

3

T1082

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Data from Local System

3

T1005

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp6B13.tmp
Filesize
1KB

MD5
e4914e35bc8e1f47552785e6cfe30366

SHA1
158a70b8cd10e08b1e7b73114b14a1f466e5310e

SHA256
ce19cce01dd5679bebb1ae869b1ad8613a0fd426745eeca0d07a0cc42f9dde79

SHA512
5f407fa74d2f7b4918ad2cb74d931fbd00e156cb1e090df12c77d61f12cc6e70f54776840bd33b0eb00ae0a4af34c38b14dd150b43c2665c5bcc4df15a4245ab

Download Submit
memory/596-56-0x0000000000000000-mapping.dmp

Download
memory/896-62-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-58-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-59-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-61-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-63-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-64-0x00000000004609CE-mapping.dmp

Download
memory/896-66-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-68-0x0000000000400000-0x0000000000466000-memory.dmp

Filesize
408KB

Download
memory/896-70-0x0000000074A80000-0x000000007502B000-memory.dmp

Filesize
5.7MB

Download
memory/1912-55-0x0000000074A80000-0x000000007502B000-memory.dmp

Filesize
5.7MB

Download
memory/1912-54-0x0000000075F61000-0x0000000075F63000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads