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Analysis
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max time kernel
118s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
18/01/2025, 01:06
Static task
static1
Behavioral task
behavioral1
Sample
BstkDDU.dll
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
BstkDDU.dll
Resource
win10v2004-20241007-en
Behavioral task
behavioral3
Sample
BstkRT.dll
Resource
win7-20240903-en
Behavioral task
behavioral4
Sample
BstkRT.dll
Resource
win10v2004-20241007-en
Behavioral task
behavioral5
Sample
Factura nº 9194633.exe
Resource
win7-20240903-en
General
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Target
BstkDDU.dll
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Size
451KB
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MD5
5ea0e72799f7ab9d3f426f77e02499f5
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SHA1
03f91e09564f19f99953d82924d3437df3de5b8d
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SHA256
f7a3464b99eff79164de42b98a8d3bc3944c758386d5e446541030e205501049
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SHA512
e0ca46a585e434fdc6ba735afe94f73dbb3ff4b8b97b32801f8d20739e869c4f41e5287dd9fc90a0cb3f8d1a25e004cd0335a7b43cdae53959d79f92e0e3b836
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SSDEEP
12288:7RejOcRw0FRIOK9pcwWvni+Jr/cUkc8OIgWi9klTX:FcOcRwgRIDp6Z/cUkE9klTX
Malware Config
Extracted
agenttesla
Protocol: ftp- Host:
ftp://ftp.transotraval.cl - Port:
21 - Username:
[email protected] - Password:
vIZ2P]dt&a!d
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Agenttesla family
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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 9 ip-api.com -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2388 set thread context of 1968 2388 rundll32.exe 83 -
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AddInProcess32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1968 AddInProcess32.exe 1968 AddInProcess32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1968 AddInProcess32.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83 PID 2388 wrote to memory of 1968 2388 rundll32.exe 83
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\BstkDDU.dll,#11⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2388 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1968
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