Analysis
-
max time kernel
146s -
max time network
44s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
21-05-2022 12:40
Static task
static1
Behavioral task
behavioral1
Sample
PI . 290.pdf.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
PI . 290.pdf.exe
Resource
win10v2004-20220414-en
General
-
Target
PI . 290.pdf.exe
-
Size
658KB
-
MD5
165a8076aefc984b43248293ffe0fe04
-
SHA1
5c5f6a1d70db1493f3d9f3a0f17b6afdba2727b9
-
SHA256
5889fd00dbdb63d2e655258fac2143f291c1f94d515c8a94707f3c439fde5932
-
SHA512
337b467b703261bc311d45811901f55ec452a3f6dbcd6717969f9ead9738ed2be7c9e7052dd03fa07ececd366f0e7278aafa80b1e41ebb3bc015b2c37f502055
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.bestinjectionmachines.com - Port:
587 - Username:
v6engine@bestinjectionmachines.com - Password:
wN{qPRgN7Lo~
Signatures
-
AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
-
AgentTesla Payload 6 IoCs
Processes:
resource yara_rule behavioral1/memory/652-68-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/652-69-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/652-70-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/652-71-0x0000000000446E4E-mapping.dmp family_agenttesla behavioral1/memory/652-74-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla behavioral1/memory/652-76-0x0000000000400000-0x000000000044C000-memory.dmp family_agenttesla -
Executes dropped EXE 2 IoCs
Processes:
appli.exeRegAsm.exepid process 1404 appli.exe 652 RegAsm.exe -
Loads dropped DLL 3 IoCs
Processes:
PI . 290.pdf.exeappli.exeRegAsm.exepid process 1964 PI . 290.pdf.exe 1404 appli.exe 652 RegAsm.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
-
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
-
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe -
Adds Run key to start application 2 TTPs 3 IoCs
Processes:
reg.exeRegAsm.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\appli = "C:\\Windows\\system32\\pcalua.exe -a C:\\Windows\\SysWOW64\\appli.exe" reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows\CurrentVersion\Run\uWWL = "C:\\Users\\Admin\\AppData\\Roaming\\uWWL\\uWWL.exe" RegAsm.exe -
Drops file in System32 directory 2 IoCs
Processes:
PI . 290.pdf.exedescription ioc process File opened for modification C:\Windows\SysWOW64\appli.exe PI . 290.pdf.exe File created C:\Windows\SysWOW64\appli.exe PI . 290.pdf.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
appli.exedescription pid process target process PID 1404 set thread context of 652 1404 appli.exe RegAsm.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Suspicious behavior: EnumeratesProcesses 7 IoCs
Processes:
PI . 290.pdf.exeappli.exeRegAsm.exepid process 1964 PI . 290.pdf.exe 1964 PI . 290.pdf.exe 1404 appli.exe 1404 appli.exe 1404 appli.exe 652 RegAsm.exe 652 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
PI . 290.pdf.exeappli.exeRegAsm.exedescription pid process Token: SeDebugPrivilege 1964 PI . 290.pdf.exe Token: SeDebugPrivilege 1404 appli.exe Token: SeDebugPrivilege 652 RegAsm.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
RegAsm.exepid process 652 RegAsm.exe -
Suspicious use of WriteProcessMemory 24 IoCs
Processes:
PI . 290.pdf.execmd.exeappli.exedescription pid process target process PID 1964 wrote to memory of 2024 1964 PI . 290.pdf.exe cmd.exe PID 1964 wrote to memory of 2024 1964 PI . 290.pdf.exe cmd.exe PID 1964 wrote to memory of 2024 1964 PI . 290.pdf.exe cmd.exe PID 1964 wrote to memory of 2024 1964 PI . 290.pdf.exe cmd.exe PID 2024 wrote to memory of 1128 2024 cmd.exe reg.exe PID 2024 wrote to memory of 1128 2024 cmd.exe reg.exe PID 2024 wrote to memory of 1128 2024 cmd.exe reg.exe PID 2024 wrote to memory of 1128 2024 cmd.exe reg.exe PID 1964 wrote to memory of 1404 1964 PI . 290.pdf.exe appli.exe PID 1964 wrote to memory of 1404 1964 PI . 290.pdf.exe appli.exe PID 1964 wrote to memory of 1404 1964 PI . 290.pdf.exe appli.exe PID 1964 wrote to memory of 1404 1964 PI . 290.pdf.exe appli.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe PID 1404 wrote to memory of 652 1404 appli.exe RegAsm.exe -
outlook_office_path 1 IoCs
Processes:
RegAsm.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-790309383-526510583-3802439154-1000\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-1-5-21-790309383-526510583-3802439154-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RegAsm.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\PI . 290.pdf.exe"C:\Users\Admin\AppData\Local\Temp\PI . 290.pdf.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v appli /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Windows\SysWOW64\appli.exe"2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v appli /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Windows\SysWOW64\appli.exe"3⤵
- Adds Run key to start application
-
C:\Windows\SysWOW64\appli.exe"C:\Windows\SysWOW64\appli.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Accesses Microsoft Outlook profiles
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\RegAsm.exeFilesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
-
C:\Users\Admin\AppData\Local\Temp\RegAsm.exeFilesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
-
C:\Windows\SysWOW64\appli.exeFilesize
658KB
MD5165a8076aefc984b43248293ffe0fe04
SHA15c5f6a1d70db1493f3d9f3a0f17b6afdba2727b9
SHA2565889fd00dbdb63d2e655258fac2143f291c1f94d515c8a94707f3c439fde5932
SHA512337b467b703261bc311d45811901f55ec452a3f6dbcd6717969f9ead9738ed2be7c9e7052dd03fa07ececd366f0e7278aafa80b1e41ebb3bc015b2c37f502055
-
C:\Windows\SysWOW64\appli.exeFilesize
658KB
MD5165a8076aefc984b43248293ffe0fe04
SHA15c5f6a1d70db1493f3d9f3a0f17b6afdba2727b9
SHA2565889fd00dbdb63d2e655258fac2143f291c1f94d515c8a94707f3c439fde5932
SHA512337b467b703261bc311d45811901f55ec452a3f6dbcd6717969f9ead9738ed2be7c9e7052dd03fa07ececd366f0e7278aafa80b1e41ebb3bc015b2c37f502055
-
\Users\Admin\AppData\Local\Temp\RegAsm.exeFilesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
-
\Users\Admin\AppData\Local\Temp\RegAsm.exeFilesize
63KB
MD5b58b926c3574d28d5b7fdd2ca3ec30d5
SHA1d260c4ffd603a9cfc057fcb83d678b1cecdf86f9
SHA2566e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3
SHA512b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab
-
\Windows\SysWOW64\appli.exeFilesize
658KB
MD5165a8076aefc984b43248293ffe0fe04
SHA15c5f6a1d70db1493f3d9f3a0f17b6afdba2727b9
SHA2565889fd00dbdb63d2e655258fac2143f291c1f94d515c8a94707f3c439fde5932
SHA512337b467b703261bc311d45811901f55ec452a3f6dbcd6717969f9ead9738ed2be7c9e7052dd03fa07ececd366f0e7278aafa80b1e41ebb3bc015b2c37f502055
-
memory/652-70-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-69-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-77-0x00000000756E1000-0x00000000756E3000-memory.dmpFilesize
8KB
-
memory/652-76-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-65-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-66-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-68-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-74-0x0000000000400000-0x000000000044C000-memory.dmpFilesize
304KB
-
memory/652-71-0x0000000000446E4E-mapping.dmp
-
memory/1128-57-0x0000000000000000-mapping.dmp
-
memory/1404-62-0x0000000001350000-0x00000000013FA000-memory.dmpFilesize
680KB
-
memory/1404-59-0x0000000000000000-mapping.dmp
-
memory/1964-54-0x0000000001310000-0x00000000013BA000-memory.dmpFilesize
680KB
-
memory/1964-55-0x0000000000470000-0x000000000047A000-memory.dmpFilesize
40KB
-
memory/2024-56-0x0000000000000000-mapping.dmp