Analysis
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max time kernel
129s -
max time network
122s -
platform
windows7_x64 -
resource
win7-en-20211014 -
submitted
19-10-2021 11:03
Static task
static1
Behavioral task
behavioral1
Sample
PecpzdhhxVzEzfz.exe
Resource
win7-en-20211014
Behavioral task
behavioral2
Sample
PecpzdhhxVzEzfz.exe
Resource
win10-en-20210920
General
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Target
PecpzdhhxVzEzfz.exe
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Size
396KB
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MD5
5506f5f983abe9d8d839c3635993869d
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SHA1
c9646d81d0601d23c6b434175f5fd1f636b6d726
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SHA256
818ae91a4cafe79347b2e1b5b436ed118e53483a6a51f3fbb055d752ec00cf2c
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SHA512
907f30758a00ad963badf47d3bdcdc567c6013ed377a626607118e08a3b414728348f6a2538a5b0ca6bc99ef2526ea92f3a23a56cd1fe7caf50bec1062c19a0c
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.priserveinfra.com - Port:
587 - Username:
[email protected] - Password:
oppipl121019
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1328-63-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral1/memory/1328-65-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral1/memory/1328-64-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral1/memory/1328-66-0x000000000043762E-mapping.dmp family_agenttesla behavioral1/memory/1328-67-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla -
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-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe Key opened \REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
RegSvcs.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows\CurrentVersion\Run\NXLun = "C:\\Users\\Admin\\AppData\\Roaming\\NXLun\\NXLun.exe" RegSvcs.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
PecpzdhhxVzEzfz.exedescription pid process target process PID 1764 set thread context of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
PecpzdhhxVzEzfz.exeRegSvcs.exepid process 1764 PecpzdhhxVzEzfz.exe 1764 PecpzdhhxVzEzfz.exe 1328 RegSvcs.exe 1328 RegSvcs.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
PecpzdhhxVzEzfz.exeRegSvcs.exedescription pid process Token: SeDebugPrivilege 1764 PecpzdhhxVzEzfz.exe Token: SeDebugPrivilege 1328 RegSvcs.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
PecpzdhhxVzEzfz.exepid process 1764 PecpzdhhxVzEzfz.exe 1764 PecpzdhhxVzEzfz.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
PecpzdhhxVzEzfz.exedescription pid process target process PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe PID 1764 wrote to memory of 1328 1764 PecpzdhhxVzEzfz.exe RegSvcs.exe -
outlook_office_path 1 IoCs
Processes:
RegSvcs.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\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-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegSvcs.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\PecpzdhhxVzEzfz.exe"C:\Users\Admin\AppData\Local\Temp\PecpzdhhxVzEzfz.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1764 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1328
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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memory/1328-65-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/1328-64-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/1328-70-0x0000000004A31000-0x0000000004A32000-memory.dmpFilesize
4KB
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memory/1328-69-0x0000000004A30000-0x0000000004A31000-memory.dmpFilesize
4KB
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memory/1328-67-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/1328-66-0x000000000043762E-mapping.dmp
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memory/1328-63-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/1328-62-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/1328-61-0x0000000000400000-0x000000000043C000-memory.dmpFilesize
240KB
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memory/1764-54-0x00000000002B0000-0x00000000002B1000-memory.dmpFilesize
4KB
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memory/1764-56-0x0000000004E70000-0x0000000004E71000-memory.dmpFilesize
4KB
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memory/1764-60-0x0000000005010000-0x0000000005068000-memory.dmpFilesize
352KB
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memory/1764-59-0x0000000000680000-0x0000000000688000-memory.dmpFilesize
32KB
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memory/1764-58-0x0000000004E72000-0x0000000004E73000-memory.dmpFilesize
4KB
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memory/1764-57-0x0000000004E71000-0x0000000004E72000-memory.dmpFilesize
4KB