Analysis
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max time kernel
140s -
max time network
107s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
19-05-2024 19:53
Static task
static1
Behavioral task
behavioral1
Sample
proforma invoice.exe
Resource
win7-20240221-en
General
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Target
proforma invoice.exe
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Size
1.7MB
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MD5
61c5dde7b4dbb77058f8aad370e92648
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SHA1
753c4913e5bd73a37c04ec4b180f99aa5d15b2f0
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SHA256
4f387257ba2721c27465800f9db3e513ded059ce28b68d593de0f459dfcf95a7
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SHA512
7cc15313ed4c0373112cd08240303f4baae696eb86dd9fcf9d3de6b1773fa0e2a5089b86051fd0c15257b3588fe9135dea559dbc799880c8820bbf6e097d9ae1
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SSDEEP
24576:EAHnh+eWsN3skA4RV1Hom2KXMmHapr1X5pc0zEtdKnY2jDPFT7TVfd5HTfr6sbt5:Th+ZkldoPK8Yapyqu2jDPpNHH5T
Malware Config
Extracted
Protocol: smtp- Host:
smtp.vivaldi.net - Port:
587 - Username:
[email protected] - Password:
kelvinklin123
Signatures
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NirSoft MailPassView 5 IoCs
Password recovery tool for various email clients
resource yara_rule behavioral2/memory/3436-2-0x0000000000400000-0x0000000000484000-memory.dmp MailPassView behavioral2/memory/2140-9-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral2/memory/2140-11-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral2/memory/2140-12-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView behavioral2/memory/2140-15-0x0000000000400000-0x000000000041B000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 5 IoCs
Password recovery tool for various web browsers
resource yara_rule behavioral2/memory/3436-2-0x0000000000400000-0x0000000000484000-memory.dmp WebBrowserPassView behavioral2/memory/3324-16-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral2/memory/3324-18-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral2/memory/3324-19-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView behavioral2/memory/3324-27-0x0000000000400000-0x0000000000458000-memory.dmp WebBrowserPassView -
Nirsoft 9 IoCs
resource yara_rule behavioral2/memory/3436-2-0x0000000000400000-0x0000000000484000-memory.dmp Nirsoft behavioral2/memory/2140-9-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/2140-11-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/2140-12-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/2140-15-0x0000000000400000-0x000000000041B000-memory.dmp Nirsoft behavioral2/memory/3324-16-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral2/memory/3324-18-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral2/memory/3324-19-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft behavioral2/memory/3324-27-0x0000000000400000-0x0000000000458000-memory.dmp Nirsoft -
Uses the VBS compiler for execution 1 TTPs
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts vbc.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 14 whatismyipaddress.com 16 whatismyipaddress.com -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 1676 set thread context of 3436 1676 proforma invoice.exe 84 PID 3436 set thread context of 2140 3436 RegAsm.exe 89 PID 3436 set thread context of 3324 3436 RegAsm.exe 93 -
Suspicious behavior: EnumeratesProcesses 48 IoCs
pid Process 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 3324 vbc.exe 3324 vbc.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 1676 proforma invoice.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3436 RegAsm.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
pid Process 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe -
Suspicious use of SendNotifyMessage 3 IoCs
pid Process 1676 proforma invoice.exe 1676 proforma invoice.exe 1676 proforma invoice.exe -
Suspicious use of WriteProcessMemory 22 IoCs
description pid Process procid_target PID 1676 wrote to memory of 3436 1676 proforma invoice.exe 84 PID 1676 wrote to memory of 3436 1676 proforma invoice.exe 84 PID 1676 wrote to memory of 3436 1676 proforma invoice.exe 84 PID 1676 wrote to memory of 3436 1676 proforma invoice.exe 84 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 2140 3436 RegAsm.exe 89 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93 PID 3436 wrote to memory of 3324 3436 RegAsm.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\proforma invoice.exe"C:\Users\Admin\AppData\Local\Temp\proforma invoice.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1676 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3436 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"3⤵
- Accesses Microsoft Outlook accounts
PID:2140
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C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exeC:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"3⤵
- Suspicious behavior: EnumeratesProcesses
PID:3324
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3KB
MD5f94dc819ca773f1e3cb27abbc9e7fa27
SHA19a7700efadc5ea09ab288544ef1e3cd876255086
SHA256a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92
SHA51272a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196