General
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Target
musikk.exe
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Size
32KB
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Sample
210120-2jkmcf7yt6
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MD5
edeae783c7249315102d03a637fd3257
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SHA1
22044ad362803278ec491b260e6d34a6342f17f4
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SHA256
74957e6668e2336b8892c3943890462ee2f7e7782d25b574e8184a3862a1b396
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SHA512
88f3eee886d178455e516326ffaa7ed6f32d234583be4b10738ae7c0097fe1f503e6c9c5f95107f80ec82bfb236f36372c6d5a7c837c0415240c4ffcc329f202
Static task
static1
Behavioral task
behavioral1
Sample
musikk.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
musikk.exe
Resource
win10v20201028
Malware Config
Extracted
agenttesla
Protocol: smtp- Host:
mail.privateemail.com - Port:
587 - Username:
sales1@razorwirefecning.com - Password:
Blessings@12345
Targets
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Target
musikk.exe
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Size
32KB
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MD5
edeae783c7249315102d03a637fd3257
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SHA1
22044ad362803278ec491b260e6d34a6342f17f4
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SHA256
74957e6668e2336b8892c3943890462ee2f7e7782d25b574e8184a3862a1b396
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SHA512
88f3eee886d178455e516326ffaa7ed6f32d234583be4b10738ae7c0097fe1f503e6c9c5f95107f80ec82bfb236f36372c6d5a7c837c0415240c4ffcc329f202
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AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
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Modifies WinLogon for persistence
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Turns off Windows Defender SpyNet reporting
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AgentTesla Payload
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Looks for VirtualBox Guest Additions in registry
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Looks for VMWare Tools registry key
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Drops startup file
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Reads data files stored by FTP clients
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients
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
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application
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Legitimate hosting services abused for malware hosting/C2
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Maps connected drives based on registry
Disk information is often read in order to detect sandboxing environments.
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Suspicious use of NtSetInformationThreadHideFromDebugger
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Suspicious use of SetThreadContext
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MITRE ATT&CK Matrix ATT&CK v6
Persistence
Winlogon Helper DLL
1Modify Existing Service
1Registry Run Keys / Startup Folder
1Defense Evasion
Modify Registry
6Disabling Security Tools
4Virtualization/Sandbox Evasion
2