Analysis
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max time kernel
176s -
max time network
187s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
21-05-2022 11:15
Static task
static1
Behavioral task
behavioral1
Sample
pictures.scr
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
pictures.scr
Resource
win10v2004-20220414-en
General
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Target
pictures.scr
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Size
637KB
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MD5
0879e42f499d25bc6651cef6c74e2c42
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SHA1
08c604275d3faafa8b6fed5a26399dc0010f8964
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SHA256
ff556834b215cb5dc865342178c6e15e015cee26d4b601710c58264c5c76ba21
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SHA512
b56b2daacca231c7c6fc9db0062d8a81fbb1524b0d9909d39af9be0a24bd484ac03ad5f00597846ae968c62547af04821b41d9eff9971fe09da646d8d1ad2ecc
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
bh-31.webhostbox.net - Port:
587 - Username:
[email protected] - Password:
*JP9uoO%;M%Z
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/3456-140-0x0000000000400000-0x000000000044A000-memory.dmp family_agenttesla -
Executes dropped EXE 2 IoCs
Processes:
computer.exeRegAsm.exepid process 1960 computer.exe 3456 RegAsm.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
pictures.scrdescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation pictures.scr -
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 -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
reg.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run reg.exe Set value (str) \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\computer = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\computer.exe" reg.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
computer.exedescription pid process target process PID 1960 set thread context of 3456 1960 computer.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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Suspicious behavior: EnumeratesProcesses 29 IoCs
Processes:
pictures.scrcomputer.exeRegAsm.exepid process 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 4476 pictures.scr 1960 computer.exe 1960 computer.exe 1960 computer.exe 3456 RegAsm.exe 3456 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
pictures.scrcomputer.exeRegAsm.exedescription pid process Token: SeDebugPrivilege 4476 pictures.scr Token: SeDebugPrivilege 1960 computer.exe Token: SeDebugPrivilege 3456 RegAsm.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
RegAsm.exepid process 3456 RegAsm.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
pictures.scrcmd.execomputer.exedescription pid process target process PID 4476 wrote to memory of 2676 4476 pictures.scr cmd.exe PID 4476 wrote to memory of 2676 4476 pictures.scr cmd.exe PID 4476 wrote to memory of 2676 4476 pictures.scr cmd.exe PID 2676 wrote to memory of 4196 2676 cmd.exe reg.exe PID 2676 wrote to memory of 4196 2676 cmd.exe reg.exe PID 2676 wrote to memory of 4196 2676 cmd.exe reg.exe PID 4476 wrote to memory of 1960 4476 pictures.scr computer.exe PID 4476 wrote to memory of 1960 4476 pictures.scr computer.exe PID 4476 wrote to memory of 1960 4476 pictures.scr computer.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.exe RegAsm.exe PID 1960 wrote to memory of 3456 1960 computer.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\pictures.scr"C:\Users\Admin\AppData\Local\Temp\pictures.scr" /S1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4476 -
C:\Windows\SysWOW64\cmd.exe"cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v computer /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\computer.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:2676 -
C:\Windows\SysWOW64\reg.exeREG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v computer /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\computer.exe"3⤵
- Adds Run key to start application
PID:4196 -
C:\Users\Admin\AppData\Roaming\computer.exe"C:\Users\Admin\AppData\Roaming\computer.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1960 -
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"3⤵
- Executes dropped EXE
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:3456
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\RegAsm.exeFilesize
63KB
MD50d5df43af2916f47d00c1573797c1a13
SHA1230ab5559e806574d26b4c20847c368ed55483b0
SHA256c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc
SHA512f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2
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C:\Users\Admin\AppData\Local\Temp\RegAsm.exeFilesize
63KB
MD50d5df43af2916f47d00c1573797c1a13
SHA1230ab5559e806574d26b4c20847c368ed55483b0
SHA256c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc
SHA512f96cf9e1890746b12daf839a6d0f16f062b72c1b8a40439f96583f242980f10f867720232a6fa0f7d4d7ac0a7a6143981a5a130d6417ea98b181447134c7cfe2
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C:\Users\Admin\AppData\Roaming\computer.exeFilesize
637KB
MD50879e42f499d25bc6651cef6c74e2c42
SHA108c604275d3faafa8b6fed5a26399dc0010f8964
SHA256ff556834b215cb5dc865342178c6e15e015cee26d4b601710c58264c5c76ba21
SHA512b56b2daacca231c7c6fc9db0062d8a81fbb1524b0d9909d39af9be0a24bd484ac03ad5f00597846ae968c62547af04821b41d9eff9971fe09da646d8d1ad2ecc
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C:\Users\Admin\AppData\Roaming\computer.exeFilesize
637KB
MD50879e42f499d25bc6651cef6c74e2c42
SHA108c604275d3faafa8b6fed5a26399dc0010f8964
SHA256ff556834b215cb5dc865342178c6e15e015cee26d4b601710c58264c5c76ba21
SHA512b56b2daacca231c7c6fc9db0062d8a81fbb1524b0d9909d39af9be0a24bd484ac03ad5f00597846ae968c62547af04821b41d9eff9971fe09da646d8d1ad2ecc
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memory/1960-136-0x0000000000000000-mapping.dmp
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memory/2676-134-0x0000000000000000-mapping.dmp
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memory/3456-143-0x0000000005BF0000-0x0000000005C8C000-memory.dmpFilesize
624KB
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memory/3456-139-0x0000000000000000-mapping.dmp
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memory/3456-140-0x0000000000400000-0x000000000044A000-memory.dmpFilesize
296KB
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memory/3456-144-0x0000000006830000-0x0000000006896000-memory.dmpFilesize
408KB
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memory/3456-145-0x0000000006E10000-0x0000000006E60000-memory.dmpFilesize
320KB
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memory/3456-146-0x0000000006DC0000-0x0000000006DCA000-memory.dmpFilesize
40KB
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memory/4196-135-0x0000000000000000-mapping.dmp
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memory/4476-133-0x0000000002E50000-0x0000000002E94000-memory.dmpFilesize
272KB
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memory/4476-130-0x0000000000B00000-0x0000000000BA6000-memory.dmpFilesize
664KB
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memory/4476-132-0x0000000007BA0000-0x0000000007C32000-memory.dmpFilesize
584KB
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memory/4476-131-0x00000000080B0000-0x0000000008654000-memory.dmpFilesize
5.6MB