Analysis
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max time kernel
143s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 00:58
Static task
static1
Behavioral task
behavioral1
Sample
TT SWIFT.PDF.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
TT SWIFT.PDF.exe
Resource
win10v2004-20220414-en
General
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Target
TT SWIFT.PDF.exe
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Size
437KB
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MD5
16cead8ab91ee65984e242d25310c8eb
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SHA1
56eee9eed7bca79c2380ca2f8b88d5938af3cc10
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SHA256
285921447b7223c6f6c6419c9ddfa5d26619286089de7cefa3255aa5f6c3bd51
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SHA512
44cc25cb1b8c9e97706455f4de08d0b47dd09da957b4444901091726e74929d55ed8db284c501bd3d8f55af1c3bfdff0a3edc2a2652a50a0ba266b2976b6f9ab
Malware Config
Extracted
Protocol: smtp- Host:
mail.yitaipackaging.com - Port:
587 - Username:
[email protected] - Password:
22799213
Extracted
agenttesla
Protocol: smtp- Host:
mail.yitaipackaging.com - Port:
587 - Username:
[email protected] - Password:
22799213
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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suricata: ET MALWARE AgentTesla Exfil Via SMTP
suricata: ET MALWARE AgentTesla Exfil Via SMTP
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AgentTesla Payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/32-138-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla -
Drops file in Drivers directory 1 IoCs
Processes:
TT SWIFT.PDF.exedescription ioc process File opened for modification C:\Windows\system32\drivers\etc\hosts TT SWIFT.PDF.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
TT SWIFT.PDF.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation TT SWIFT.PDF.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:
TT SWIFT.PDF.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 TT SWIFT.PDF.exe Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 TT SWIFT.PDF.exe Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 TT SWIFT.PDF.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
TT SWIFT.PDF.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gKWBf = "C:\\Users\\Admin\\AppData\\Roaming\\gKWBf\\gKWBf.exe" TT SWIFT.PDF.exe -
Drops file in System32 directory 2 IoCs
Processes:
svchost.exedescription ioc process File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{66A5F708-AFA8-4470-B2F8-7A386E7720D4}.catalogItem svchost.exe File created C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{813802F5-49C3-4172-B736-B0CCC248DFDE}.catalogItem svchost.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
TT SWIFT.PDF.exedescription pid process target process PID 4076 set thread context of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
svchost.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString svchost.exe Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz svchost.exe -
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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Enumerates system info in registry 2 TTPs 2 IoCs
Processes:
svchost.exedescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS svchost.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU svchost.exe -
Modifies registry key 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 5 IoCs
Processes:
TT SWIFT.PDF.exeTT SWIFT.PDF.exepid process 4076 TT SWIFT.PDF.exe 4076 TT SWIFT.PDF.exe 4076 TT SWIFT.PDF.exe 32 TT SWIFT.PDF.exe 32 TT SWIFT.PDF.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
TT SWIFT.PDF.exeTT SWIFT.PDF.exedescription pid process Token: SeDebugPrivilege 4076 TT SWIFT.PDF.exe Token: SeDebugPrivilege 32 TT SWIFT.PDF.exe -
Suspicious use of WriteProcessMemory 14 IoCs
Processes:
TT SWIFT.PDF.exeTT SWIFT.PDF.exedescription pid process target process PID 4076 wrote to memory of 1332 4076 TT SWIFT.PDF.exe schtasks.exe PID 4076 wrote to memory of 1332 4076 TT SWIFT.PDF.exe schtasks.exe PID 4076 wrote to memory of 1332 4076 TT SWIFT.PDF.exe schtasks.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 4076 wrote to memory of 32 4076 TT SWIFT.PDF.exe TT SWIFT.PDF.exe PID 32 wrote to memory of 4332 32 TT SWIFT.PDF.exe REG.exe PID 32 wrote to memory of 4332 32 TT SWIFT.PDF.exe REG.exe PID 32 wrote to memory of 4332 32 TT SWIFT.PDF.exe REG.exe -
outlook_office_path 1 IoCs
Processes:
TT SWIFT.PDF.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 TT SWIFT.PDF.exe -
outlook_win_path 1 IoCs
Processes:
TT SWIFT.PDF.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 TT SWIFT.PDF.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\TT SWIFT.PDF.exe"C:\Users\Admin\AppData\Local\Temp\TT SWIFT.PDF.exe"1⤵
- Checks computer location settings
- 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\dumIvW" /XML "C:\Users\Admin\AppData\Local\Temp\tmp82CC.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\TT SWIFT.PDF.exe"{path}"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- 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\System32\svchost.exeC:\Windows\System32\svchost.exe -k netsvcs -p1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
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\tmp82CC.tmpFilesize
1KB
MD554ca8bd3fa25b6115450f6b96ffecd9d
SHA17f197fd3a9c272aaa74ef18bcc6a9e12672a75c5
SHA2561c46b1c81b6451084bb54aaa5312588c61f12faef6877f378f4530b4bdbb527f
SHA5120b892e54546cfe7a70dd56327cfa2b51120a998792335ddbb9318309f79859aeee6179463c01994c579d2cce97e6d59d5ea61fcaad2f14371aff1757badbb4c8
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memory/32-137-0x0000000000000000-mapping.dmp
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memory/32-138-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
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memory/32-139-0x00000000060E0000-0x0000000006146000-memory.dmpFilesize
408KB
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memory/32-140-0x0000000006520000-0x0000000006570000-memory.dmpFilesize
320KB
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memory/1332-135-0x0000000000000000-mapping.dmp
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memory/4076-130-0x00000000006C0000-0x0000000000734000-memory.dmpFilesize
464KB
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memory/4076-131-0x0000000007B00000-0x00000000080A4000-memory.dmpFilesize
5.6MB
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memory/4076-132-0x00000000075F0000-0x0000000007682000-memory.dmpFilesize
584KB
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memory/4076-133-0x00000000075B0000-0x00000000075BA000-memory.dmpFilesize
40KB
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memory/4076-134-0x0000000009AC0000-0x0000000009B5C000-memory.dmpFilesize
624KB
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memory/4332-141-0x0000000000000000-mapping.dmp