Analysis
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max time kernel
125s -
max time network
46s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
20-05-2022 22:17
Static task
static1
Behavioral task
behavioral1
Sample
Attached Proforma-xls.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
Attached Proforma-xls.exe
Resource
win10v2004-20220414-en
General
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Target
Attached Proforma-xls.exe
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Size
671KB
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MD5
6d22a496faacb5fd4c4717256c219b5c
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SHA1
ca2acc40e012b00b007900071cca1e334a49c3d5
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SHA256
5af795fb7f2afc8329d025b4b5f053942b82c75f4b3796a1a53f77e97e74019d
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SHA512
91be74d93f503d7763190a1a5f24779bf0b5f721649484928f34fcd97eb3ae310bcad397371df5e1a251a34e46db1be5916fbf467480e28c7a5220121dda19b8
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
smtp.yandex.com - Port:
587 - Username:
[email protected] - Password:
company1960
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/892-64-0x0000000000400000-0x0000000000458000-memory.dmp family_agenttesla behavioral1/memory/892-65-0x0000000000400000-0x0000000000458000-memory.dmp family_agenttesla behavioral1/memory/892-66-0x0000000000400000-0x0000000000458000-memory.dmp family_agenttesla behavioral1/memory/892-67-0x00000000004538AE-mapping.dmp family_agenttesla behavioral1/memory/892-69-0x0000000000400000-0x0000000000458000-memory.dmp family_agenttesla behavioral1/memory/892-71-0x0000000000400000-0x0000000000458000-memory.dmp family_agenttesla -
Looks for VirtualBox Guest Additions in registry 2 TTPs
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Looks for VMWare Tools registry key 2 TTPs
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Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
Attached Proforma-xls.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion Attached Proforma-xls.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion Attached Proforma-xls.exe -
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:
Attached Proforma-xls.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Attached Proforma-xls.exe Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Attached Proforma-xls.exe Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Attached Proforma-xls.exe -
Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
Attached Proforma-xls.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum Attached Proforma-xls.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0 Attached Proforma-xls.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Attached Proforma-xls.exedescription pid process target process PID 1664 set thread context of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.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 5 IoCs
Processes:
Attached Proforma-xls.exeAttached Proforma-xls.exepid process 1664 Attached Proforma-xls.exe 1664 Attached Proforma-xls.exe 1664 Attached Proforma-xls.exe 892 Attached Proforma-xls.exe 892 Attached Proforma-xls.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Attached Proforma-xls.exeAttached Proforma-xls.exedescription pid process Token: SeDebugPrivilege 1664 Attached Proforma-xls.exe Token: SeDebugPrivilege 892 Attached Proforma-xls.exe -
Suspicious use of WriteProcessMemory 13 IoCs
Processes:
Attached Proforma-xls.exedescription pid process target process PID 1664 wrote to memory of 588 1664 Attached Proforma-xls.exe schtasks.exe PID 1664 wrote to memory of 588 1664 Attached Proforma-xls.exe schtasks.exe PID 1664 wrote to memory of 588 1664 Attached Proforma-xls.exe schtasks.exe PID 1664 wrote to memory of 588 1664 Attached Proforma-xls.exe schtasks.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe PID 1664 wrote to memory of 892 1664 Attached Proforma-xls.exe Attached Proforma-xls.exe -
outlook_office_path 1 IoCs
Processes:
Attached Proforma-xls.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 Attached Proforma-xls.exe -
outlook_win_path 1 IoCs
Processes:
Attached Proforma-xls.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 Attached Proforma-xls.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Attached Proforma-xls.exe"C:\Users\Admin\AppData\Local\Temp\Attached Proforma-xls.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- 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\VpwSKBybNCVas" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA516.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\Attached Proforma-xls.exe"{path}"2⤵
- 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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C:\Users\Admin\AppData\Local\Temp\tmpA516.tmpFilesize
1KB
MD5120340bf9c19e3d63f7fcceef92d1b98
SHA10f456db85a0ecf27650edd4e3dcb38f65781ae09
SHA2560e18cf6425243dae379b52f361f733875a3c3b4ef3a0d60b8ddab459a357084c
SHA5125fea7aba28880ea991f0682614d41a80ef2891d40a1eb8cf0a0053c7364ba86c7ce6eed7f60fae638fba1f7eb48c16708414187ee5d98d925c2612eaba1eac40
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memory/588-59-0x0000000000000000-mapping.dmp
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memory/892-64-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/892-61-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/892-62-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/892-65-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/892-66-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/892-67-0x00000000004538AE-mapping.dmp
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memory/892-69-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/892-71-0x0000000000400000-0x0000000000458000-memory.dmpFilesize
352KB
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memory/1664-57-0x0000000005FE0000-0x000000000607C000-memory.dmpFilesize
624KB
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memory/1664-58-0x0000000005F10000-0x0000000005FA2000-memory.dmpFilesize
584KB
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memory/1664-56-0x0000000000650000-0x000000000065A000-memory.dmpFilesize
40KB
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memory/1664-55-0x0000000076011000-0x0000000076013000-memory.dmpFilesize
8KB
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memory/1664-54-0x0000000000CD0000-0x0000000000D7E000-memory.dmpFilesize
696KB