agenttesla | b33d9e331c5b5e6a463d3be8b0456156459983fa4889009e9ba23e355f8548e5

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
10-10-2024 08:46

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General

Target

Quotation Sample_398893.xlsx
Size

1.0MB
MD5

1fa0c01f5ce39c3040b272cc0178b526
SHA1

7dcc0072cda211e5af3e025335398691736f7c7d
SHA256

b33d9e331c5b5e6a463d3be8b0456156459983fa4889009e9ba23e355f8548e5
SHA512

2c686ad61500d70ebeeddc04b26bcb6301877960c2dd03fcc4f82dc8344607ee04b33cf06ab9e63e160393a407a5385991cac5ccbfe5d35b6535705bb075bc49
SSDEEP

24576:DsP8ORmk0aZyMRIithugFmoXo0Jf4rkL7cd1AQIRL:DW8ORlZdthugFD4rPLA9

Score

10^/10

agenttesla collection discovery execution keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
mail.hermosanairobi.com
Port:
587
Username:
[email protected]
Password:
+efQ)lDLJF7899
Email To:
[email protected]

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2084	EQNEDT32.EXE
7	2084	EQNEDT32.EXE

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2596	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2740	asnjouying.scr
2620	asnjouying.scr

Loads dropped DLL 2 IoCs

pid	Process
2084	EQNEDT32.EXE
2740	asnjouying.scr

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

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	asnjouying.scr
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	asnjouying.scr
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	asnjouying.scr

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2740 set thread context of 2620	2740	asnjouying.scr	35

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	asnjouying.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	asnjouying.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2084	EQNEDT32.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2832	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2596	powershell.exe
2620	asnjouying.scr
2620	asnjouying.scr

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	asnjouying.scr
Token: SeDebugPrivilege	2596	powershell.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2832	EXCEL.EXE
2832	EXCEL.EXE
2832	EXCEL.EXE

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 2740	2084	EQNEDT32.EXE	33
PID 2084 wrote to memory of 2740	2084	EQNEDT32.EXE	33
PID 2084 wrote to memory of 2740	2084	EQNEDT32.EXE	33
PID 2084 wrote to memory of 2740	2084	EQNEDT32.EXE	33
PID 2740 wrote to memory of 2596	2740	asnjouying.scr	34
PID 2740 wrote to memory of 2596	2740	asnjouying.scr	34
PID 2740 wrote to memory of 2596	2740	asnjouying.scr	34
PID 2740 wrote to memory of 2596	2740	asnjouying.scr	34
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35
PID 2740 wrote to memory of 2620	2740	asnjouying.scr	35

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	asnjouying.scr

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	asnjouying.scr

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde "C:\Users\Admin\AppData\Local\Temp\Quotation Sample_398893.xlsx"
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2832

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Users\Admin\AppData\Local\Temp\asnjouying.scr
  C:\Users\Admin\AppData\Local\Temp\asnjouying.scr
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\asnjouying.scr"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2596
- - C:\Users\Admin\AppData\Local\Temp\asnjouying.scr
    "C:\Users\Admin\AppData\Local\Temp\asnjouying.scr"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook profiles
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Exploitation for Client Execution

T1203

Persistence

Privilege Escalation

Defense Evasion

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

Query Registry

T1012

System Information Discovery

T1082

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

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Downloads

\Users\Admin\AppData\Local\Temp\asnjouying.scr

Filesize
731KB

MD5
ed4c050ce6f4a63abdf9a7cdc1627684

SHA1
d4479bc370d5123714231e22e6fe798254a926e1

SHA256
8871961077d7992c085a7a2464082f6c39179d14711d294ceee60a25dc50011d

SHA512
80939200b0edf8aa98a22f2ee24fde503b20a22d109429c0e2470bf70326571d103c5acc4d19a9dabb28093b134e227a7f91fbbdf313e683b8b43094a771d162

Download Submit
memory/2620-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2620-33-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2620-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2620-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2620-38-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2620-39-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2620-27-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2620-32-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2740-21-0x0000000000010000-0x00000000000CC000-memory.dmp

Filesize
752KB

Download
memory/2740-25-0x0000000005B80000-0x0000000005BF2000-memory.dmp

Filesize
456KB

Download
memory/2740-23-0x0000000000500000-0x0000000000518000-memory.dmp

Filesize
96KB

Download
memory/2832-24-0x000000007254D000-0x0000000072558000-memory.dmp

Filesize
44KB

Download
memory/2832-1-0x000000007254D000-0x0000000072558000-memory.dmp

Filesize
44KB

Download
memory/2832-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download