Analysis
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max time kernel
83s -
max time network
47s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21-05-2022 01:36
Static task
static1
Behavioral task
behavioral1
Sample
Bank Details.pdf.exe
Resource
win7-20220414-en
General
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Target
Bank Details.pdf.exe
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Size
470KB
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MD5
f13e09c25b9c7c10247bb018181a8814
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SHA1
5bfffdee2bedf34c51efd4d1caf546f5d2f0302d
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SHA256
2ae952b2cc6f04f55a42c82386e16ddece41b1f8f6cff192cc18eb2b037d89b4
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SHA512
0c44eb7d8a5d0d07d0a180d548fbe3c8e13b4077d1b99ae2ab9cf058a4040eb369cf41d578d3366f7502ce5b5cfb28f2c47287f8aa8a61f470fc6b7022aa6466
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.hotel71.com.bd - Port:
587 - Username:
[email protected] - Password:
9+^va&phP1v9
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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CoreEntity .NET Packer 1 IoCs
A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.
Processes:
resource yara_rule behavioral1/memory/1044-56-0x0000000000410000-0x0000000000418000-memory.dmp coreentity -
AgentTesla Payload 6 IoCs
Processes:
resource yara_rule behavioral1/memory/1948-61-0x0000000000400000-0x0000000000450000-memory.dmp family_agenttesla behavioral1/memory/1948-62-0x0000000000400000-0x0000000000450000-memory.dmp family_agenttesla behavioral1/memory/1948-63-0x0000000000400000-0x0000000000450000-memory.dmp family_agenttesla behavioral1/memory/1948-64-0x000000000044AC5E-mapping.dmp family_agenttesla behavioral1/memory/1948-66-0x0000000000400000-0x0000000000450000-memory.dmp family_agenttesla behavioral1/memory/1948-68-0x0000000000400000-0x0000000000450000-memory.dmp family_agenttesla -
ReZer0 packer 1 IoCs
Detects ReZer0, a packer with multiple versions used in various campaigns.
Processes:
resource yara_rule behavioral1/memory/1044-57-0x0000000000AF0000-0x0000000000B48000-memory.dmp rezer0 -
Disables Task Manager via registry modification
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Drops file in Drivers directory 1 IoCs
Processes:
RegSvcs.exedescription ioc process File opened for modification C:\Windows\system32\drivers\etc\hosts RegSvcs.exe -
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Bank Details.pdf.exedescription pid process target process PID 1044 set thread context of 1948 1044 Bank Details.pdf.exe RegSvcs.exe -
Modifies registry key 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
RegSvcs.exepid process 1948 RegSvcs.exe 1948 RegSvcs.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
RegSvcs.exedescription pid process Token: SeDebugPrivilege 1948 RegSvcs.exe -
Suspicious use of WriteProcessMemory 20 IoCs
Processes:
Bank Details.pdf.exeRegSvcs.exedescription pid process target process PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1044 wrote to memory of 1948 1044 Bank Details.pdf.exe RegSvcs.exe PID 1948 wrote to memory of 1668 1948 RegSvcs.exe REG.exe PID 1948 wrote to memory of 1668 1948 RegSvcs.exe REG.exe PID 1948 wrote to memory of 1668 1948 RegSvcs.exe REG.exe PID 1948 wrote to memory of 1668 1948 RegSvcs.exe REG.exe PID 1948 wrote to memory of 1088 1948 RegSvcs.exe netsh.exe PID 1948 wrote to memory of 1088 1948 RegSvcs.exe netsh.exe PID 1948 wrote to memory of 1088 1948 RegSvcs.exe netsh.exe PID 1948 wrote to memory of 1088 1948 RegSvcs.exe netsh.exe -
outlook_office_path 1 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
outlook_win_path 1 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Bank Details.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Bank Details.pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"{path}"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
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C:\Windows\SysWOW64\REG.exeREG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f3⤵
- Modifies registry key
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C:\Windows\SysWOW64\netsh.exe"netsh" wlan show profile3⤵
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/1044-54-0x0000000000800000-0x000000000087C000-memory.dmpFilesize
496KB
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memory/1044-55-0x00000000759F1000-0x00000000759F3000-memory.dmpFilesize
8KB
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memory/1044-56-0x0000000000410000-0x0000000000418000-memory.dmpFilesize
32KB
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memory/1044-57-0x0000000000AF0000-0x0000000000B48000-memory.dmpFilesize
352KB
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memory/1088-71-0x0000000000000000-mapping.dmp
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memory/1668-70-0x0000000000000000-mapping.dmp
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memory/1948-61-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/1948-62-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/1948-63-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/1948-64-0x000000000044AC5E-mapping.dmp
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memory/1948-66-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/1948-68-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/1948-59-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB
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memory/1948-58-0x0000000000400000-0x0000000000450000-memory.dmpFilesize
320KB