Analysis
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max time kernel
97s -
max time network
49s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21-05-2022 00:58
Static task
static1
Behavioral task
behavioral1
Sample
Sheet.......pdf.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
Sheet.......pdf.exe
Resource
win10v2004-20220414-en
General
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Target
Sheet.......pdf.exe
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Size
437KB
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MD5
ac621011571eca9bfcc83b3457e8bc4e
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SHA1
9979d2ac17eaaeb8c65457212cd0b8f25db24dc4
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SHA256
c4ccd023eed63b7c47c69e1b08e267f4579cc54e9998f3767d7c1438127b6d1a
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SHA512
86715884fc9ce924919b37ec820ebf57f8acf7ede3eadd4aa1af71da9d606bf8e3f41f33b2e958bd11826377a7ccdd94f1328235fb457a41041592e30500b783
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
us2.smtp.mailhostbox.com - Port:
587 - Username:
[email protected] - Password:
nnedimma080
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 6 IoCs
Processes:
resource yara_rule behavioral1/memory/2000-61-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/2000-62-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/2000-63-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/2000-64-0x0000000000447DEE-mapping.dmp family_agenttesla behavioral1/memory/2000-66-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/2000-68-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
Sheet.......pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Sheet.......pdf.exe Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Sheet.......pdf.exe Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Sheet.......pdf.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Sheet.......pdf.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\YYtJku = "C:\\Users\\Admin\\AppData\\Roaming\\YYtJku\\YYtJku.exe" Sheet.......pdf.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Sheet.......pdf.exedescription pid process target process PID 1564 set thread context of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
Sheet.......pdf.exeSheet.......pdf.exepid process 1564 Sheet.......pdf.exe 2000 Sheet.......pdf.exe 2000 Sheet.......pdf.exe -
Suspicious behavior: RenamesItself 1 IoCs
Processes:
Sheet.......pdf.exepid process 2000 Sheet.......pdf.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Sheet.......pdf.exeSheet.......pdf.exedescription pid process Token: SeDebugPrivilege 1564 Sheet.......pdf.exe Token: SeDebugPrivilege 2000 Sheet.......pdf.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
Sheet.......pdf.exedescription pid process target process PID 1564 wrote to memory of 1900 1564 Sheet.......pdf.exe schtasks.exe PID 1564 wrote to memory of 1900 1564 Sheet.......pdf.exe schtasks.exe PID 1564 wrote to memory of 1900 1564 Sheet.......pdf.exe schtasks.exe PID 1564 wrote to memory of 1900 1564 Sheet.......pdf.exe schtasks.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe PID 1564 wrote to memory of 2000 1564 Sheet.......pdf.exe Sheet.......pdf.exe -
outlook_office_path 1 IoCs
Processes:
Sheet.......pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Sheet.......pdf.exe -
outlook_win_path 1 IoCs
Processes:
Sheet.......pdf.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Sheet.......pdf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Sheet.......pdf.exe"C:\Users\Admin\AppData\Local\Temp\Sheet.......pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\hrZoEWJfRidjT" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8344.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Sheet.......pdf.exe"{path}"2⤵
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\tmp8344.tmpFilesize
1KB
MD5bc47803d8fb9cbeb882e7f44a745c55a
SHA1955ce161df7a5d35b49a7db4100ce028466bd21c
SHA256cad20b71ab87c21191f01297fa200a8f8385afe7871da0f604f05979e54a0cc6
SHA512607b4952650ee98b3048bf35f131d5a33e8fb01185cc55e6aab8548c5d408c1ba7c6f657df9ffbdbef90dcf59490081ed5d088ece9e1debdbc31d6d37deb2fde
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memory/1564-54-0x00000000763B1000-0x00000000763B3000-memory.dmpFilesize
8KB
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memory/1564-55-0x0000000074FF0000-0x000000007559B000-memory.dmpFilesize
5.7MB
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memory/1900-56-0x0000000000000000-mapping.dmp
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memory/2000-61-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-59-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-58-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-62-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-63-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-64-0x0000000000447DEE-mapping.dmp
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memory/2000-66-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-68-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/2000-70-0x0000000074F80000-0x000000007552B000-memory.dmpFilesize
5.7MB