agenttesla | 3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
03-10-2024 00:27

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General

Target

3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
Size

865KB
MD5

d8404d85fa9f6980630b5ee00b4a90c0
SHA1

c72db1e830c1ec09a813824c4cb14719ac1f011c
SHA256

3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41
SHA512

d01d9bd2423ed849f0447d533229224a8dea26bb041f1a4f70be655855d243f7d2843bb6b138fa653b8e0f0aca932139204942fadde795e99bea1279fad2de49
SSDEEP

12288:4YV6MorX7qzuC3QHO9FQVHPF51jgcqxk2HW06fpZYxEkaOiOeuZmCxcdif1BWk:XBXu9HGaVHqHHafpEEoeVCSUfuk

Score

10^/10

agenttesla collection credential_access discovery keylogger persistence spyware stealer trojan upx

Malware Config

Signatures

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

AgentTesla payload 14 IoCs

resource	yara_rule
behavioral1/memory/2176-15-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-14-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-8-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-30-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-35-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-33-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-32-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-27-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-26-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-24-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-22-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-21-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-20-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral1/memory/2176-19-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bi.url	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\MyApp = "C:\\Users\\Admin\\AppData\\Roaming\\MyApp\\MyApp.exe"	RegAsm.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	checkip.amazonaws.com

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/2404-17-0x0000000000920000-0x0000000000AFD000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2404 set thread context of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2404-0-0x0000000000920000-0x0000000000AFD000-memory.dmp	upx
behavioral1/memory/2404-17-0x0000000000920000-0x0000000000AFD000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2176	RegAsm.exe
2176	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2176	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2176	RegAsm.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31
PID 2404 wrote to memory of 2176	2404	3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe	31

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe
"C:\Users\Admin\AppData\Local\Temp\3cf2c0aa307a4485eb1f730d8e1289d1036ca9381a59ee74e49c26f1d9184e41N.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2404
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:2176

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2176-35-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-15-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-36-0x0000000074032000-0x0000000074034000-memory.dmp

Filesize
8KB

Download
memory/2176-32-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-33-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-14-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-8-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-19-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-18-0x0000000074032000-0x0000000074034000-memory.dmp

Filesize
8KB

Download
memory/2176-30-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-7-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-20-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2176-27-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-26-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-24-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-22-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2176-21-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2404-6-0x00000000001E0000-0x00000000001E1000-memory.dmp

Filesize
4KB

Download
memory/2404-17-0x0000000000920000-0x0000000000AFD000-memory.dmp

Filesize
1.9MB

Download
memory/2404-0-0x0000000000920000-0x0000000000AFD000-memory.dmp

Filesize
1.9MB

Download