Analysis
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max time kernel
151s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
12-07-2022 10:19
Static task
static1
Behavioral task
behavioral1
Sample
RFQ.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
RFQ.exe
Resource
win10v2004-20220414-en
General
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Target
RFQ.exe
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Size
414KB
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MD5
8cf823ee0766126638d33918383ca5d8
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SHA1
3b215b084b9ff049a860fc29108f62c4b6d2133b
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SHA256
6de7efc9e04cb4db0acc603a7ed700b186d0545acd0e8e84a1d8cce668202dc8
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SHA512
41cd0278ebb15faddd178fb826e8dc74021980f09b94ff785b1b6d88d5504c2e7b37450484666fd7a00e3c3e865459ace696c41ad84e4d0630d1ef893e93ed94
Malware Config
Extracted
Protocol: smtp- Host:
mail.cpworldindia.com - Port:
587 - Username:
import.cs@ahd.cpworldindia.com - Password:
imprtcs@2019
Extracted
agenttesla
Protocol: smtp- Host:
mail.cpworldindia.com - Port:
587 - Username:
import.cs@ahd.cpworldindia.com - Password:
imprtcs@2019
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/2132-138-0x0000000000400000-0x0000000000452000-memory.dmp family_agenttesla -
Disables Task Manager via registry modification
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Drops file in Drivers directory 1 IoCs
Processes:
RFQ.exedescription ioc process File opened for modification C:\Windows\system32\drivers\etc\hosts RFQ.exe -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
RFQ.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation RFQ.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:
RFQ.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RFQ.exe Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RFQ.exe Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RFQ.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
RFQ.exedescription pid process target process PID 552 set thread context of 2132 552 RFQ.exe RFQ.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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Modifies registry key 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
RFQ.exeRFQ.exepid process 552 RFQ.exe 2132 RFQ.exe 2132 RFQ.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
RFQ.exeRFQ.exedescription pid process Token: SeDebugPrivilege 552 RFQ.exe Token: SeDebugPrivilege 2132 RFQ.exe -
Suspicious use of WriteProcessMemory 17 IoCs
Processes:
RFQ.exeRFQ.exedescription pid process target process PID 552 wrote to memory of 5108 552 RFQ.exe schtasks.exe PID 552 wrote to memory of 5108 552 RFQ.exe schtasks.exe PID 552 wrote to memory of 5108 552 RFQ.exe schtasks.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 552 wrote to memory of 2132 552 RFQ.exe RFQ.exe PID 2132 wrote to memory of 5008 2132 RFQ.exe REG.exe PID 2132 wrote to memory of 5008 2132 RFQ.exe REG.exe PID 2132 wrote to memory of 5008 2132 RFQ.exe REG.exe PID 2132 wrote to memory of 664 2132 RFQ.exe netsh.exe PID 2132 wrote to memory of 664 2132 RFQ.exe netsh.exe PID 2132 wrote to memory of 664 2132 RFQ.exe netsh.exe -
outlook_office_path 1 IoCs
Processes:
RFQ.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 RFQ.exe -
outlook_win_path 1 IoCs
Processes:
RFQ.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 RFQ.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\RFQ.exe"C:\Users\Admin\AppData\Local\Temp\RFQ.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\FzcrWS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9271.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\RFQ.exe"{path}"2⤵
- Drops file in Drivers directory
- Accesses Microsoft Outlook profiles
- 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\SysWOW64\netsh.exe"netsh" wlan show profile3⤵
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\tmp9271.tmpFilesize
1KB
MD59b3f85784454362f113d70c56787b9f1
SHA11dfcd3f658e4c352195f2bd6e04dd6654c5aa715
SHA2563a9fdbe1d003aeb6b8d66d8796f5405e494c02a3151be1914dc59e64a5826fbc
SHA5121def30d37a520d25f104920ec48db8fee16992bcf54fd9af6d9a9693e5671477e2ce387d9b6686c4fc2b7b0064a8493140d38ef85f247d79eec9326f5129ac2e
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memory/552-133-0x00000000058D0000-0x00000000058DA000-memory.dmpFilesize
40KB
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memory/552-132-0x00000000057A0000-0x0000000005832000-memory.dmpFilesize
584KB
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memory/552-130-0x0000000000D90000-0x0000000000DFE000-memory.dmpFilesize
440KB
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memory/552-134-0x0000000008F20000-0x0000000008FBC000-memory.dmpFilesize
624KB
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memory/552-131-0x0000000005E00000-0x00000000063A4000-memory.dmpFilesize
5.6MB
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memory/664-142-0x0000000000000000-mapping.dmp
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memory/2132-137-0x0000000000000000-mapping.dmp
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memory/2132-138-0x0000000000400000-0x0000000000452000-memory.dmpFilesize
328KB
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memory/2132-139-0x0000000006680000-0x00000000066E6000-memory.dmpFilesize
408KB
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memory/2132-141-0x0000000006A80000-0x0000000006AD0000-memory.dmpFilesize
320KB
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memory/5008-140-0x0000000000000000-mapping.dmp
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memory/5108-135-0x0000000000000000-mapping.dmp