agenttesla | d81e35754aa34fb2fd0b850b4f1d8080a64a8408623303d3a8abecea5b0a30de

Analysis

max time kernel
143s
max time network
156s
platform
windows10_x64
resource
win10-en-20210920
submitted
18-10-2021 11:33

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General

Target

[Schedule_&_Booking__18th_oct.exe
Size

525KB
MD5

4114e15de65a9ec4b8eacc3ef60804bb
SHA1

eb450264abe3b3ed70167f267cb974ea13d60260
SHA256

d81e35754aa34fb2fd0b850b4f1d8080a64a8408623303d3a8abecea5b0a30de
SHA512

256e27521a7008896808a798222025769a00aa155148e843a959c969bb9b7e369a4d57f5d1605fe4c1d1f0704c675df638eea032f602c51d1fb78e2af8e6805c

Score

10^/10

agenttesla quasar venomrat office04 collection evasion keylogger persistence rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.mail.ru
Port:
587
Username:
[email protected]
Password:
PxhrKDkvikRcSaP2dkv9

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

grace.adds-only.xyz:1609

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes

encryption_key
wHq4o3k6UfKZv19jkcxs
install_name
winrara.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup
subdirectory
SubDir

Extracted

Family

quasar

Mutex

Attributes

encryption_key
install_name
log_directory
reconnect_delay
3000
startup_key
subdirectory

Signatures

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

Contains code to disable Windows Defender 3 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/5012-176-0x0000000000400000-0x000000000048C000-memory.dmp	disable_win_def
behavioral2/memory/5012-177-0x0000000000486C1E-mapping.dmp	disable_win_def
behavioral2/memory/5012-197-0x0000000004F60000-0x000000000545E000-memory.dmp	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

Quasar Payload 3 IoCs

resource	yara_rule
behavioral2/memory/5012-176-0x0000000000400000-0x000000000048C000-memory.dmp	family_quasar
behavioral2/memory/5012-177-0x0000000000486C1E-mapping.dmp	family_quasar
behavioral2/memory/5012-197-0x0000000004F60000-0x000000000545E000-memory.dmp	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile
suricata

AgentTesla Payload 3 IoCs

resource	yara_rule
behavioral2/memory/2492-126-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral2/memory/2492-129-0x000000000043780E-mapping.dmp	family_agenttesla
behavioral2/memory/2492-138-0x00000000054B0000-0x00000000059AE000-memory.dmp	family_agenttesla

Downloads MZ/PE file

Executes dropped EXE 3 IoCs

pid	Process
3244	apps.exe
5012	apps.exe
312	winrara.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

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	apps.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	apps.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	[Schedule_&_Booking__18th_oct.exe
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	[Schedule_&_Booking__18th_oct.exe
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	[Schedule_&_Booking__18th_oct.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows\CurrentVersion\Run\desktop_app = "C:\\Users\\Admin\\AppData\\Roaming\\desktop_app\\desktop_app.exe"	[Schedule_&_Booking__18th_oct.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
37	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3580 set thread context of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3244 set thread context of 5012	3244	apps.exe	84

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 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2764	schtasks.exe
4992	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
3580	[Schedule_&_Booking__18th_oct.exe
3580	[Schedule_&_Booking__18th_oct.exe
2492	[Schedule_&_Booking__18th_oct.exe
2492	[Schedule_&_Booking__18th_oct.exe
3124	powershell.exe
3124	powershell.exe
3124	powershell.exe
3244	apps.exe
3244	apps.exe
4952	powershell.exe
4952	powershell.exe
4952	powershell.exe
1212	powershell.exe
1212	powershell.exe
1212	powershell.exe
5012	apps.exe
5012	apps.exe
5012	apps.exe
5012	apps.exe
5012	apps.exe
5012	apps.exe
5012	apps.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	3580	[Schedule_&_Booking__18th_oct.exe
Token: SeDebugPrivilege	2492	[Schedule_&_Booking__18th_oct.exe
Token: SeDebugPrivilege	3124	powershell.exe
Token: SeDebugPrivilege	3244	apps.exe
Token: SeDebugPrivilege	4952	powershell.exe
Token: SeDebugPrivilege	5012	apps.exe
Token: SeDebugPrivilege	1212	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2492	[Schedule_&_Booking__18th_oct.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 3580 wrote to memory of 3124	3580	[Schedule_&_Booking__18th_oct.exe	70
PID 3580 wrote to memory of 3124	3580	[Schedule_&_Booking__18th_oct.exe	70
PID 3580 wrote to memory of 3124	3580	[Schedule_&_Booking__18th_oct.exe	70
PID 3580 wrote to memory of 2764	3580	[Schedule_&_Booking__18th_oct.exe	72
PID 3580 wrote to memory of 2764	3580	[Schedule_&_Booking__18th_oct.exe	72
PID 3580 wrote to memory of 2764	3580	[Schedule_&_Booking__18th_oct.exe	72
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 3580 wrote to memory of 2492	3580	[Schedule_&_Booking__18th_oct.exe	73
PID 2492 wrote to memory of 3244	2492	[Schedule_&_Booking__18th_oct.exe	79
PID 2492 wrote to memory of 3244	2492	[Schedule_&_Booking__18th_oct.exe	79
PID 2492 wrote to memory of 3244	2492	[Schedule_&_Booking__18th_oct.exe	79
PID 3244 wrote to memory of 4952	3244	apps.exe	80
PID 3244 wrote to memory of 4952	3244	apps.exe	80
PID 3244 wrote to memory of 4952	3244	apps.exe	80
PID 3244 wrote to memory of 4992	3244	apps.exe	82
PID 3244 wrote to memory of 4992	3244	apps.exe	82
PID 3244 wrote to memory of 4992	3244	apps.exe	82
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 3244 wrote to memory of 5012	3244	apps.exe	84
PID 5012 wrote to memory of 312	5012	apps.exe	85
PID 5012 wrote to memory of 312	5012	apps.exe	85
PID 5012 wrote to memory of 312	5012	apps.exe	85
PID 5012 wrote to memory of 1212	5012	apps.exe	86
PID 5012 wrote to memory of 1212	5012	apps.exe	86
PID 5012 wrote to memory of 1212	5012	apps.exe	86
PID 5012 wrote to memory of 4668	5012	apps.exe	88
PID 5012 wrote to memory of 4668	5012	apps.exe	88
PID 5012 wrote to memory of 4668	5012	apps.exe	88
PID 4668 wrote to memory of 1840	4668	cmd.exe	90
PID 4668 wrote to memory of 1840	4668	cmd.exe	90
PID 4668 wrote to memory of 1840	4668	cmd.exe	90

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	[Schedule_&_Booking__18th_oct.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2481030822-2828258191-1606198294-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	[Schedule_&_Booking__18th_oct.exe

C:\Users\Admin\AppData\Local\Temp\[Schedule_&_Booking__18th_oct.exe
"C:\Users\Admin\AppData\Local\Temp\[Schedule_&_Booking__18th_oct.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3580
- 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\[Schedule_&_Booking__18th_oct.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3124
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\swqpSTZh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp47A4.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:2764
- C:\Users\Admin\AppData\Local\Temp\[Schedule_&_Booking__18th_oct.exe
  "C:\Users\Admin\AppData\Local\Temp\[Schedule_&_Booking__18th_oct.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  - outlook_office_path
  - outlook_win_path
  PID:2492
- - C:\Users\Admin\AppData\Local\Temp\apps.exe
    "C:\Users\Admin\AppData\Local\Temp\apps.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3244
  - - 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\apps.exe"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4952
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\kCCzCqEnSxl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp96D8.tmp"
      4⤵
      Creates scheduled task(s)
      PID:4992
  - - C:\Users\Admin\AppData\Local\Temp\apps.exe
      "C:\Users\Admin\AppData\Local\Temp\apps.exe"
      4⤵
      Executes dropped EXE
      Windows security modification
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:5012
    - - C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe
        
        "C:\Users\Admin\AppData\Roaming\SubDir\winrara.exe"
        5⤵
        Executes dropped EXE
        
        PID:312
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell" Get-MpPreference -verbose
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1212
    - - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4668
      - C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
        6⤵
        
        PID:1840

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/312-246-0x0000000007B10000-0x000000000800E000-memory.dmp

Filesize
5.0MB

Download
memory/1212-349-0x000000007F030000-0x000000007F031000-memory.dmp

Filesize
4KB

Download
memory/1212-215-0x00000000007B0000-0x00000000007B1000-memory.dmp

Filesize
4KB

Download
memory/1212-244-0x00000000007B2000-0x00000000007B3000-memory.dmp

Filesize
4KB

Download
memory/1212-352-0x00000000007B3000-0x00000000007B4000-memory.dmp

Filesize
4KB

Download
memory/2492-126-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2492-160-0x0000000005910000-0x0000000005911000-memory.dmp

Filesize
4KB

Download
memory/2492-138-0x00000000054B0000-0x00000000059AE000-memory.dmp

Filesize
5.0MB

Download
memory/2492-699-0x00000000054B0000-0x00000000059AE000-memory.dmp

Filesize
5.0MB

Download
memory/3124-136-0x0000000006A10000-0x0000000006A11000-memory.dmp

Filesize
4KB

Download
memory/3124-140-0x0000000006DD0000-0x0000000006DD1000-memory.dmp

Filesize
4KB

Download
memory/3124-145-0x0000000008090000-0x0000000008091000-memory.dmp

Filesize
4KB

Download
memory/3124-146-0x0000000007EC0000-0x0000000007EC1000-memory.dmp

Filesize
4KB

Download
memory/3124-147-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/3124-157-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/3124-158-0x0000000006A13000-0x0000000006A14000-memory.dmp

Filesize
4KB

Download
memory/3124-159-0x0000000006A14000-0x0000000006A16000-memory.dmp

Filesize
8KB

Download
memory/3124-143-0x00000000077B0000-0x00000000077B1000-memory.dmp

Filesize
4KB

Download
memory/3124-142-0x0000000006E80000-0x0000000006E81000-memory.dmp

Filesize
4KB

Download
memory/3124-141-0x00000000076F0000-0x00000000076F1000-memory.dmp

Filesize
4KB

Download
memory/3124-144-0x00000000076A0000-0x00000000076A1000-memory.dmp

Filesize
4KB

Download
memory/3124-127-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/3124-128-0x00000000009F0000-0x00000000009F1000-memory.dmp

Filesize
4KB

Download
memory/3124-131-0x0000000004360000-0x0000000004361000-memory.dmp

Filesize
4KB

Download
memory/3124-134-0x0000000007050000-0x0000000007051000-memory.dmp

Filesize
4KB

Download
memory/3124-137-0x0000000006A12000-0x0000000006A13000-memory.dmp

Filesize
4KB

Download
memory/3244-165-0x0000000000300000-0x0000000000301000-memory.dmp

Filesize
4KB

Download
memory/3244-173-0x0000000009410000-0x00000000094B8000-memory.dmp

Filesize
672KB

Download
memory/3244-170-0x0000000007010000-0x000000000750E000-memory.dmp

Filesize
5.0MB

Download
memory/3580-117-0x0000000007340000-0x0000000007341000-memory.dmp

Filesize
4KB

Download
memory/3580-118-0x0000000006EE0000-0x0000000006EE1000-memory.dmp

Filesize
4KB

Download
memory/3580-119-0x0000000006ED0000-0x0000000006ED1000-memory.dmp

Filesize
4KB

Download
memory/3580-115-0x0000000000130000-0x0000000000131000-memory.dmp

Filesize
4KB

Download
memory/3580-120-0x0000000009370000-0x0000000009371000-memory.dmp

Filesize
4KB

Download
memory/3580-121-0x00000000092D0000-0x00000000092D8000-memory.dmp

Filesize
32KB

Download
memory/3580-122-0x0000000006E40000-0x000000000733E000-memory.dmp

Filesize
5.0MB

Download
memory/3580-123-0x0000000008C10000-0x0000000008C69000-memory.dmp

Filesize
356KB

Download
memory/4952-191-0x0000000007570000-0x0000000007571000-memory.dmp

Filesize
4KB

Download
memory/4952-180-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/4952-199-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/4952-181-0x00000000005A0000-0x00000000005A1000-memory.dmp

Filesize
4KB

Download
memory/4952-196-0x00000000041E2000-0x00000000041E3000-memory.dmp

Filesize
4KB

Download
memory/4952-247-0x000000007FD80000-0x000000007FD81000-memory.dmp

Filesize
4KB

Download
memory/4952-249-0x00000000041E3000-0x00000000041E4000-memory.dmp

Filesize
4KB

Download
memory/4952-195-0x00000000041E0000-0x00000000041E1000-memory.dmp

Filesize
4KB

Download
memory/4952-194-0x00000000079E0000-0x00000000079E1000-memory.dmp

Filesize
4KB

Download
memory/5012-197-0x0000000004F60000-0x000000000545E000-memory.dmp

Filesize
5.0MB

Download
memory/5012-176-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download