agenttesla | efe702eff8b1684d9a92b1a5f24e1f375033dd124e588ee30cc778adc16d76f1

Analysis

max time kernel
121s
max time network
124s
platform
windows10_x64
resource
win10-en-20211014
submitted
18/10/2021, 10:36

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General

Target
92c492_959babd593ed4cd49dd3b6a0f1146d59.ps1
Size 355KB
Sample211018-mm9l5aechm
SHA256 efe702eff8b1684d9a92b1a5f24e1f375033dd124e588ee30cc778adc16d76f1
MD5 20155e92f6a7a7763994226e11713552
SHA1 40924207e867cf348592997149b3c4c09218913b
SHA512 593cdb29c24e72818603dfbe367db4e85a6e5750309658cda0b3443b2b4a65188a51f83bac20089095cdd1400d032be1fa33937d52aeaaf468d53df834559191
MD5 SHA1 SHA512

Score

10^/10

agenttesla collection keylogger 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 1 IoCs

resource	yara_rule
behavioral2/memory/4648-189-0x000000000043755E-mapping.dmp	family_agenttesla

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	RegAsm.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

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe
Key opened	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3392 set thread context of 4648	3392	powershell.exe	72

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3392	powershell.exe
3392	powershell.exe
3392	powershell.exe
4648	RegAsm.exe
4648	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3392	powershell.exe
Token: SeDebugPrivilege	4648	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4648	RegAsm.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3392 wrote to memory of 4528	3392	powershell.exe	70
PID 3392 wrote to memory of 4528	3392	powershell.exe	70
PID 4528 wrote to memory of 4600	4528	csc.exe	71
PID 4528 wrote to memory of 4600	4528	csc.exe	71
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72
PID 3392 wrote to memory of 4648	3392	powershell.exe	72

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	RegAsm.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\92c492_959babd593ed4cd49dd3b6a0f1146d59.ps1
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3392
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\kfatldol\kfatldol.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4528
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
    C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESC3AE.tmp" "c:\Users\Admin\AppData\Local\Temp\kfatldol\CSCBADAB2B2E9FF4DA79B9E9A8C108E13DD.TMP"
    3⤵
    PID:4600
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Drops file in Drivers directory
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:4648

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3392-127-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-119-0x000001E0654F0000-0x000001E0654F1000-memory.dmp

Download

memory/3392-122-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-123-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-124-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-125-0x000001E065FE0000-0x000001E065FE1000-memory.dmp

Download

memory/3392-126-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

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memory/3392-115-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

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memory/3392-131-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-132-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-191-0x000001E065476000-0x000001E065478000-memory.dmp

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memory/3392-121-0x000001E065473000-0x000001E065475000-memory.dmp

Download

memory/3392-120-0x000001E065470000-0x000001E065472000-memory.dmp

Download

memory/3392-187-0x000001E04D000000-0x000001E04D004000-memory.dmp

Download

memory/3392-118-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

Download

memory/3392-117-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

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memory/3392-116-0x000001E04B3E0000-0x000001E04B3E2000-memory.dmp

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memory/4648-196-0x0000000005620000-0x0000000005621000-memory.dmp

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memory/4648-200-0x0000000005621000-0x0000000005622000-memory.dmp

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