agenttesla | cf0bf5de52bbc06c76d726f34f17d10fe3759a067c1a51b704eefba18efe65d4

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
23-12-2024 17:52

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General

Target

5b6d5819cc000436777cda63e9022fdd19b15a91451c7b8c4608db9fcf3d359c.vbs
Size

2.4MB
MD5

7a690238b7ada1318edede1f7190ac29
SHA1

7c9df4979e1a5a9f205fc6c1e139112297ddc6bc
SHA256

5b6d5819cc000436777cda63e9022fdd19b15a91451c7b8c4608db9fcf3d359c
SHA512

e7c49f13ba5ba9c096c9c69746a2e908753ae3a2c03307c29d36a304023981a4bfc369776c1beff144c80dd7d4d4d47812054c86d4cbaddd8f665505c113af23
SSDEEP

24576:CHZqNW+LcY+MC/2nd7xTFgLO3pCVXB0byLVswFtuUoQhAdWXAYK/ZB6rDVoWhCLm:2ZgU8ZEOgVR0OJt1oZB6HV7QUumt05y

Score

10^/10

agenttesla quasar office collection credential_access discovery execution keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

https://api.telegram.org/bot5127674234:AAHGscjRk7JCDDCItFO4GPZfan-K7Hc89Z8/sendDocument

Extracted

Family

quasar

Version

1.4.0

Botnet

Office

3.83.129.253:4747

Mutex

fa713452-a1f8-4da7-a382-97f45b1b5335

Attributes

encryption_key
9C151EB9A0DBBD17722074A748153D56BF64F723
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Agenttesla family
agenttesla
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/1052-57-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1052-55-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1052-54-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1052-51-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1052-49-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar

AgentTesla payload 5 IoCs

resource	yara_rule
behavioral1/memory/868-38-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/868-37-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/868-35-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/868-32-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla
behavioral1/memory/868-30-0x0000000000400000-0x000000000043C000-memory.dmp	family_agenttesla

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
2876	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
2564	Google.exe
2808	notepad.exe
868	notepad.exe

Loads dropped DLL 1 IoCs

pid	Process
2808	notepad.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\hmltog = "C:\\Users\\Admin\\AppData\\Roaming\\hmltog\\hmltog.exe"	notepad.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 868	2808	notepad.exe	33
PID 2564 set thread context of 1052	2564	Google.exe	38

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 6 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	Google.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	notepad.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
868	notepad.exe
868	notepad.exe
2876	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	868	notepad.exe
Token: SeDebugPrivilege	1052	RegSvcs.exe
Token: SeDebugPrivilege	2876	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1052	RegSvcs.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1052	RegSvcs.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1052	RegSvcs.exe
868	notepad.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 2564	2756	WScript.exe	30
PID 2756 wrote to memory of 2564	2756	WScript.exe	30
PID 2756 wrote to memory of 2564	2756	WScript.exe	30
PID 2756 wrote to memory of 2564	2756	WScript.exe	30
PID 2756 wrote to memory of 2808	2756	WScript.exe	31
PID 2756 wrote to memory of 2808	2756	WScript.exe	31
PID 2756 wrote to memory of 2808	2756	WScript.exe	31
PID 2756 wrote to memory of 2808	2756	WScript.exe	31
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2808 wrote to memory of 868	2808	notepad.exe	33
PID 2564 wrote to memory of 2876	2564	Google.exe	34
PID 2564 wrote to memory of 2876	2564	Google.exe	34
PID 2564 wrote to memory of 2876	2564	Google.exe	34
PID 2564 wrote to memory of 2876	2564	Google.exe	34
PID 2564 wrote to memory of 2788	2564	Google.exe	36
PID 2564 wrote to memory of 2788	2564	Google.exe	36
PID 2564 wrote to memory of 2788	2564	Google.exe	36
PID 2564 wrote to memory of 2788	2564	Google.exe	36
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38
PID 2564 wrote to memory of 1052	2564	Google.exe	38

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	notepad.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\5b6d5819cc000436777cda63e9022fdd19b15a91451c7b8c4608db9fcf3d359c.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Users\Admin\AppData\Local\Temp\Google.exe
  "C:\Users\Admin\AppData\Local\Temp\Google.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\xXKBkYDYj.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2876
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\xXKBkYDYj" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFD62.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2788
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of SetWindowsHookEx
    PID:1052
- C:\Users\Admin\AppData\Local\Temp\notepad.exe
  "C:\Users\Admin\AppData\Local\Temp\notepad.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2808
- - C:\Users\Admin\AppData\Local\Temp\notepad.exe
    "C:\Users\Admin\AppData\Local\Temp\notepad.exe"
    3⤵
    - Executes dropped EXE
    - 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:868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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 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

C:\Users\Admin\AppData\Local\Temp\Google.exe

Filesize
1.0MB

MD5
8aba5e2140c382e5817452748c3ecb16

SHA1
492aa98cdd0b1e1665d7fe592d73fbb949247ea6

SHA256
f170610a1155a605f18bf116ac90c1d83f93d709d4dc40974da429af4352b9ee

SHA512
5ed010b690e4da41b1d6363a1c0f21003fb578b78a2c6bafba140083bde29a971bc31cdb2476abe1c5dbcc2289f8bd2e291d7c920467c7182038a792c3499b59

Download Submit
C:\Users\Admin\AppData\Local\Temp\notepad.exe

Filesize
757KB

MD5
4aa72ed512ffb2077978ef041dbe2e41

SHA1
35879349bdd7c3bca9ca97b07d6078faa7304871

SHA256
a9e6700d6bede169026ea3ff8ffc248454569610c10581e368b5834fb218141a

SHA512
d7f9c55f4431af459ee48212af9d9f2c0346ec598eaf03c6bcb31a32c33791e8ab7738b1dc833b333feba985fd99654b0b2cdf03c1e508c9f43876a3ac41e0b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpFD62.tmp

Filesize
1KB

MD5
f8db8bac5cb17f342bf0b8a75ccc6251

SHA1
313b416a4dac0c871d0c2183ecb2b9debeb66ca8

SHA256
4f8a1fac58c9de1ae29b9846bf81800c82ea295e255f9e72a2277dcffbd38533

SHA512
16875b192de09bd9140561017ab48d00eac07028fa21cd2b39c9b6ea27929f06e6137df95a9df8d43750c861db1a0f8eb26033c9a511f5d4c5f628e6edaeef14

Download Submit
memory/868-38-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/868-26-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/868-28-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/868-30-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/868-32-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/868-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/868-35-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/868-37-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/1052-57-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1052-55-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1052-45-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1052-47-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1052-49-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1052-51-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1052-53-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1052-54-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2564-16-0x0000000000360000-0x0000000000372000-memory.dmp

Filesize
72KB

Download
memory/2564-14-0x00000000000E0000-0x00000000001E8000-memory.dmp

Filesize
1.0MB

Download
memory/2564-44-0x0000000008150000-0x00000000081DA000-memory.dmp

Filesize
552KB

Download
memory/2564-58-0x0000000074710000-0x0000000074DFE000-memory.dmp

Filesize
6.9MB

Download
memory/2564-15-0x0000000074710000-0x0000000074DFE000-memory.dmp

Filesize
6.9MB

Download
memory/2564-19-0x0000000074710000-0x0000000074DFE000-memory.dmp

Filesize
6.9MB

Download
memory/2564-21-0x0000000007F10000-0x0000000007FD6000-memory.dmp

Filesize
792KB

Download
memory/2808-13-0x0000000000B40000-0x0000000000C02000-memory.dmp

Filesize
776KB

Download
memory/2808-12-0x000000007471E000-0x000000007471F000-memory.dmp

Filesize
4KB

Download
memory/2808-17-0x00000000003F0000-0x0000000000402000-memory.dmp

Filesize
72KB

Download
memory/2808-22-0x0000000004D70000-0x0000000004DB4000-memory.dmp

Filesize
272KB

Download
memory/2808-18-0x000000007471E000-0x000000007471F000-memory.dmp

Filesize
4KB

Download
memory/2808-20-0x0000000005C10000-0x0000000005C96000-memory.dmp

Filesize
536KB

Download