Analysis
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max time kernel
193s -
max time network
198s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 01:28
Static task
static1
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20220414-en
General
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Target
tmp.exe
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Size
653KB
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MD5
cf67271f2b35c9db343f08eba81c2408
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SHA1
2862120c6c8fac978543d4dc9ccf8cf337361fe6
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SHA256
447531e094a1210b3de8f430e72c6fc8abcb8adfee2b029ad7480bb4eb2f77a7
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SHA512
a18926c2dc262ae1125ee1bf5a33e11712e52aad38db8fe0947e0f4b0ad5abc398a3a8422ba1ee0fb739de7c28d62ab4b266832c03ee2706b7715e3b02ca7751
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
us2.smtp.mailhostbox.com - Port:
587 - Username:
[email protected] - Password:
5+t@dw5Mc}Dr
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
tmp.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation tmp.exe -
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:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
tmp.exedescription pid process target process PID 1168 set thread context of 4576 1168 tmp.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 3396 timeout.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
tmp.exeRegAsm.exepid process 1168 tmp.exe 1168 tmp.exe 4576 RegAsm.exe 4576 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
RegAsm.exedescription pid process Token: SeDebugPrivilege 4576 RegAsm.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
tmp.execmd.exedescription pid process target process PID 1168 wrote to memory of 2632 1168 tmp.exe cmd.exe PID 1168 wrote to memory of 2632 1168 tmp.exe cmd.exe PID 1168 wrote to memory of 2632 1168 tmp.exe cmd.exe PID 2632 wrote to memory of 3396 2632 cmd.exe timeout.exe PID 2632 wrote to memory of 3396 2632 cmd.exe timeout.exe PID 2632 wrote to memory of 3396 2632 cmd.exe timeout.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe PID 1168 wrote to memory of 4576 1168 tmp.exe RegAsm.exe -
outlook_office_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
outlook_win_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout 102⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout 103⤵
- Delays execution with timeout.exe
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exeC:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/1168-131-0x0000000000A30000-0x0000000000ADA000-memory.dmpFilesize
680KB
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memory/2632-132-0x0000000000000000-mapping.dmp
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memory/3396-133-0x0000000000000000-mapping.dmp
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memory/4576-134-0x0000000000000000-mapping.dmp
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memory/4576-135-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4576-136-0x0000000005D80000-0x0000000006324000-memory.dmpFilesize
5.6MB
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memory/4576-137-0x00000000058D0000-0x000000000596C000-memory.dmpFilesize
624KB
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memory/4576-138-0x00000000065E0000-0x0000000006646000-memory.dmpFilesize
408KB
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memory/4576-139-0x0000000006AC0000-0x0000000006B10000-memory.dmpFilesize
320KB