Analysis
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max time kernel
128s -
max time network
120s -
platform
windows10_x64 -
resource
win10-en-20211104 -
submitted
01-12-2021 08:32
Static task
static1
Behavioral task
behavioral1
Sample
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe
Resource
win7-en-20211104
Behavioral task
behavioral2
Sample
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe
Resource
win10-en-20211104
General
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Target
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe
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Size
732KB
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MD5
d47502f0f5b346169fe57cabb1228eee
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SHA1
9ddfed11c7fd9beedc44c39ce7f1cac45783b532
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SHA256
2d1dda31bb4e7657a3f9878a056323e398590837d3c11b45540013103bfbca97
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SHA512
24869686cdea61de8025471bed5f5fe38ea0e5e94aec375cf52a25fc5ec28319314471576f66d5bbe66da45c252a6620cd272dc2690fbc929973a0e0b8eb284b
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.dairysystems.co.ke - Port:
587 - Username:
[email protected] - Password:
2019@systems
Signatures
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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AgentTesla Payload 3 IoCs
Processes:
resource yara_rule behavioral2/memory/3528-127-0x0000000000400000-0x000000000043C000-memory.dmp family_agenttesla behavioral2/memory/3528-128-0x000000000043763E-mapping.dmp family_agenttesla behavioral2/memory/3528-134-0x0000000005140000-0x000000000563E000-memory.dmp family_agenttesla -
Drops file in Drivers directory 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription ioc process File opened for modification C:\Windows\system32\drivers\etc\hosts SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.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:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe Key opened \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe Key opened \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows\CurrentVersion\Run\kprUEGC = "C:\\Users\\Admin\\AppData\\Roaming\\kprUEGC\\kprUEGC.exe" SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription pid process target process PID 4292 set thread context of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exepid process 3528 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe 3528 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription pid process Token: SeDebugPrivilege 3528 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exepid process 3528 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription pid process target process PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe PID 4292 wrote to memory of 3528 4292 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
outlook_office_path 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe -
outlook_win_path 1 IoCs
Processes:
SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-1042495040-510797905-2613508344-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4292 -
C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe"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 SetWindowsHookEx
- outlook_office_path
- outlook_win_path
PID:3528
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\SecuriteInfo.com.Trojan.YakbeexMSIL.ZZ4.1057.9472.exe.log
MD50c2899d7c6746f42d5bbe088c777f94c
SHA1622f66c5f7a3c91b28a9f43ce7c6cabadbf514f1
SHA2565b0b99740cadaeff7b9891136644b396941547e20cc7eea646560d0dad5a5458
SHA512ab7a3409ed4b6ca00358330a3aa4ef6de7d81eb21a5e24bb629ef6a7c7c4e2a70ca3accfbc989ed6e495fdb8eb6203a26d6f2a37b2a5809af4276af375b49078