Analysis
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max time kernel
128s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20250217-en -
resource tags
arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system -
submitted
27/02/2025, 06:32
Static task
static1
Behavioral task
behavioral1
Sample
URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe
Resource
win10v2004-20250217-en
General
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Target
URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe
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Size
2.4MB
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MD5
c3b5d2314930b677e70e2174647eec9c
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SHA1
ca3f9e5900c943c0aa33efd95c83fac1850b0aa0
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SHA256
140b71c1dc8ccf24de4f4bdd0c1acd6db259b720eb263123b7c100d5a6051852
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SHA512
b63ea62c13e5f421eb945afb6f02a01448db42c9fe7c97a6085851048a1f184f43af744355f93115065b4bfcf3eee59f806a6701de7767a49eb155ec55fca587
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SSDEEP
49152:4LmAT3UAXdrbW5Z6MneR+Hq/GdEv3hg4W8ZSS:ImAYA6ZvHq/XhgI
Malware Config
Extracted
vipkeylogger
Protocol: smtp- Host:
mail.iaa-airferight.com - Port:
25 - Username:
[email protected] - Password:
moneyismade22 - Email To:
[email protected]
Signatures
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Suspicious use of NtCreateUserProcessOtherParentProcess 2 IoCs
description pid Process procid_target PID 320 created 3412 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 56 PID 1764 created 3412 1764 InstallUtil.exe 56 -
VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
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Vipkeylogger family
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Drops startup file 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Opcode.vbs URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe Key opened \REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe Key opened \REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 28 checkip.dyndns.org 30 reallyfreegeoip.org 31 reallyfreegeoip.org -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 320 set thread context of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 1764 set thread context of 4376 1764 InstallUtil.exe 94 -
System Location Discovery: System Language Discovery 1 TTPs 3 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 InstallUtil.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 1764 InstallUtil.exe 1764 InstallUtil.exe 1764 InstallUtil.exe 4376 InstallUtil.exe 4376 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
description pid Process Token: SeDebugPrivilege 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe Token: SeDebugPrivilege 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe Token: SeDebugPrivilege 1764 InstallUtil.exe Token: SeDebugPrivilege 1764 InstallUtil.exe Token: SeDebugPrivilege 4376 InstallUtil.exe -
Suspicious use of WriteProcessMemory 16 IoCs
description pid Process procid_target PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 320 wrote to memory of 1764 320 URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe 91 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 PID 1764 wrote to memory of 4376 1764 InstallUtil.exe 94 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-250031470-1197856012-2659781506-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 InstallUtil.exe
Processes
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C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵PID:3412
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C:\Users\Admin\AppData\Local\Temp\URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe"C:\Users\Admin\AppData\Local\Temp\URGENTDHL-OVERDUEACCOUNTLETTER-1300711528.exe"2⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:320
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"2⤵
- Suspicious use of NtCreateUserProcessOtherParentProcess
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1764
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"2⤵
- Accesses Microsoft Outlook profiles
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4376
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