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Analysis
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max time kernel
128s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
21/11/2022, 13:57
Static task
static1
Behavioral task
behavioral1
Sample
Payment advis pdf.scr.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
Payment advis pdf.scr.exe
Resource
win10v2004-20221111-en
General
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Target
Payment advis pdf.scr.exe
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Size
375KB
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MD5
c841e0d1d9238121a768bceb6339f5c9
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SHA1
62d9cfda2108525125a795467c62cda564c6ebb5
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SHA256
2cf36ac3e8c07fcbeb2ec52dd992d2722aa68305db8d5a1dee9be0b6ccd186ef
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SHA512
3834eb7529313c7653d46716790620c982f0a933fcabc4be1c37554b6bb198bd726f4dfaee0ee9b338c2f5d51a07294cd7c509b13f5ba78dc4cba3e5cdd782cc
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SSDEEP
6144:ZVGdx6x2FUdnyePvRqloupOCaDU+tnvqtxKarFZJDJyUsN/hvRB7y:HtdyePvRTupTaDU+tvc3rpJslhj+
Malware Config
Extracted
agenttesla
Protocol: ftp- Host:
ftp://ftp.mcmprint.net - Port:
21 - Username:
[email protected] - Password:
l9Hh{#_(0shZ
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
description ioc Process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe Payment advis pdf.scr.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe caspol.exe -
Loads dropped DLL 1 IoCs
pid Process 4988 Payment advis pdf.scr.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.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 81 api.ipify.org 82 api.ipify.org -
Drops file in System32 directory 1 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\Spheroidal.Col Payment advis pdf.scr.exe -
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
pid Process 4408 caspol.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 4988 Payment advis pdf.scr.exe 4408 caspol.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 4988 set thread context of 4408 4988 Payment advis pdf.scr.exe 85 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 4408 caspol.exe 4408 caspol.exe 4408 caspol.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 4988 Payment advis pdf.scr.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4408 caspol.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 4988 wrote to memory of 4408 4988 Payment advis pdf.scr.exe 85 PID 4988 wrote to memory of 4408 4988 Payment advis pdf.scr.exe 85 PID 4988 wrote to memory of 4408 4988 Payment advis pdf.scr.exe 85 PID 4988 wrote to memory of 4408 4988 Payment advis pdf.scr.exe 85 -
outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe -
outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 caspol.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Payment advis pdf.scr.exe"C:\Users\Admin\AppData\Local\Temp\Payment advis pdf.scr.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4988 -
C:\Windows\Microsoft.NET\Framework\v2.0.50727\caspol.exe"C:\Users\Admin\AppData\Local\Temp\Payment advis pdf.scr.exe"2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4408
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
11KB
MD575ed96254fbf894e42058062b4b4f0d1
SHA1996503f1383b49021eb3427bc28d13b5bbd11977
SHA256a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7
SHA51258174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4