Analysis
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max time kernel
136s -
max time network
128s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
26-01-2021 20:25
Behavioral task
behavioral1
Sample
case (1057).xls
Resource
win7v20201028
General
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Target
case (1057).xls
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Size
153KB
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MD5
cbc37bc9a7ec9836c033708d090db81c
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SHA1
a1fbde54662fb5cdb677f5841a3603df30345108
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SHA256
95e0295b15b7c624febe347f44747dada5cb1fc79b73561b3153af81b351a8de
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SHA512
03c04ea7f7f64836491fa345f075f86f9e983770e0ce174daa2ee187a79c748b548b82c3a1c4f870d6390a616a03a8f713795c2b902d788c4bc2aa17e21d2f05
Malware Config
Extracted
zloader
kev
26/01
https://gadgetswolf.com/post.php
https://homesoapmolds.com/post.php
https://govemedico.tk/post.php
Signatures
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
rundll32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 3780 1036 rundll32.exe EXCEL.EXE -
Blocklisted process makes network request 3 IoCs
Processes:
msiexec.exeflow pid process 32 3116 msiexec.exe 34 3116 msiexec.exe 36 3116 msiexec.exe -
Loads dropped DLL 1 IoCs
Processes:
rundll32.exepid process 1284 rundll32.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious use of SetThreadContext 1 IoCs
Processes:
rundll32.exedescription pid process target process PID 1284 set thread context of 3116 1284 rundll32.exe msiexec.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
EXCEL.EXEdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 1036 EXCEL.EXE -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
msiexec.exedescription pid process Token: SeSecurityPrivilege 3116 msiexec.exe Token: SeSecurityPrivilege 3116 msiexec.exe -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE 1036 EXCEL.EXE -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
EXCEL.EXErundll32.exerundll32.exedescription pid process target process PID 1036 wrote to memory of 3780 1036 EXCEL.EXE rundll32.exe PID 1036 wrote to memory of 3780 1036 EXCEL.EXE rundll32.exe PID 3780 wrote to memory of 1284 3780 rundll32.exe rundll32.exe PID 3780 wrote to memory of 1284 3780 rundll32.exe rundll32.exe PID 3780 wrote to memory of 1284 3780 rundll32.exe rundll32.exe PID 1284 wrote to memory of 3116 1284 rundll32.exe msiexec.exe PID 1284 wrote to memory of 3116 1284 rundll32.exe msiexec.exe PID 1284 wrote to memory of 3116 1284 rundll32.exe msiexec.exe PID 1284 wrote to memory of 3116 1284 rundll32.exe msiexec.exe PID 1284 wrote to memory of 3116 1284 rundll32.exe msiexec.exe
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\case (1057).xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rundll32.exe"C:\Windows\System32\rundll32.exe" C:\ProgramData\formnet.dll,DllRegisterServer3⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\msiexec.exemsiexec.exe4⤵
- Blocklisted process makes network request
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\ProgramData\formnet.dllMD5
b0f3fa047f6ae39a145fd364f693638e
SHA11951696d8aca4a31614bb68f9da392402785e14e
SHA2560bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890
SHA51286e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98
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\ProgramData\formnet.dllMD5
b0f3fa047f6ae39a145fd364f693638e
SHA11951696d8aca4a31614bb68f9da392402785e14e
SHA2560bf22b8f9aaef21afe71fcbbea62325e7582dad410b0a537f38a9eb8e6855890
SHA51286e4516705380617a9f48b2e1cd7d9e676439398b802eb6047cd478d4b10bf8f4ba20e019f337b01761fa247cd631ccab22851f078089c2e1c61574bca9f5b98
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memory/1036-5-0x00007FFC34F80000-0x00007FFC355B7000-memory.dmpFilesize
6.2MB
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memory/1036-2-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmpFilesize
64KB
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memory/1036-6-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmpFilesize
64KB
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memory/1036-4-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmpFilesize
64KB
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memory/1036-3-0x00007FFC119D0000-0x00007FFC119E0000-memory.dmpFilesize
64KB
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memory/1284-9-0x0000000000000000-mapping.dmp
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memory/1284-11-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/1284-12-0x0000000002BF0000-0x0000000002BF1000-memory.dmpFilesize
4KB
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memory/3116-13-0x0000000000000000-mapping.dmp
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memory/3116-14-0x0000000000400000-0x0000000000426000-memory.dmpFilesize
152KB
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memory/3780-7-0x0000000000000000-mapping.dmp