Analysis
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max time kernel
151s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220113 -
submitted
19/01/2022, 00:14
Static task
static1
Behavioral task
behavioral1
Sample
bf17e17ac450bdb3c8facde0f72402bd.xll
Resource
win7-en-20211208
Behavioral task
behavioral2
Sample
bf17e17ac450bdb3c8facde0f72402bd.xll
Resource
win10v2004-en-20220113
General
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Target
bf17e17ac450bdb3c8facde0f72402bd.xll
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Size
1.7MB
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MD5
bf17e17ac450bdb3c8facde0f72402bd
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SHA1
e31a8d85239522ef7542291cc66c3ba30d5cb8f1
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SHA256
b2e7408b9eb3af0bb7c4267432fa08e92fd335ddc72a69acbab123a7d919fb44
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SHA512
64c042d649f83e851086c7172220cecd937f482a50f48e56714bf43ad328ccfa555b69d5f2d3f72254f3daf113bfdffaf446532b3aeee2b3c998a9b557ce7ea5
Malware Config
Extracted
Signatures
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Bazar Loader
Detected loader normally used to deploy BazarBackdoor malware.
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2228 1232 rundll32.exe 51 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral2/memory/2228-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 3 IoCs
flow pid Process 36 2228 rundll32.exe 39 2228 rundll32.exe 40 2228 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 1232 EXCEL.EXE 1232 EXCEL.EXE 2228 rundll32.exe -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description 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
description ioc Process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1232 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 1232 wrote to memory of 2228 1232 EXCEL.EXE 58 PID 1232 wrote to memory of 2228 1232 EXCEL.EXE 58
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\bf17e17ac450bdb3c8facde0f72402bd.xll"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1232 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectiveE.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:2228
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