Analysis
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max time kernel
109s -
max time network
134s -
platform
windows10-2004_x64 -
resource
win10v2004-en-20220112 -
submitted
19/01/2022, 09:39
Static task
static1
Behavioral task
behavioral1
Sample
2741d6da882c151334cb7777b2f8bf26f8b0e197d244f1aa86570b040f334a76.xll
Resource
win10v2004-en-20220112
General
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Target
2741d6da882c151334cb7777b2f8bf26f8b0e197d244f1aa86570b040f334a76.xll
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Size
1.7MB
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MD5
7d42847bf18bc1de902661998c69991f
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SHA1
55feab0ce9c6eb0558b34c801d2f290ddb570afe
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SHA256
2741d6da882c151334cb7777b2f8bf26f8b0e197d244f1aa86570b040f334a76
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SHA512
5ae2d47ad7d4b44b4338676a5c244ea54b9fc9e8bcdd20345de189365a13d146504e962dc57907be52dca5a0bb2b81c577c71af7df25ef00bbab902ebd5b5f36
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 2508 3872 rundll32.exe 50 -
Bazar/Team9 Loader payload 1 IoCs
resource yara_rule behavioral1/memory/2508-152-0x0000000180000000-0x000000018003C000-memory.dmp BazarLoaderVar5 -
Blocklisted process makes network request 4 IoCs
flow pid Process 31 2508 rundll32.exe 35 2508 rundll32.exe 38 2508 rundll32.exe 39 2508 rundll32.exe -
Loads dropped DLL 3 IoCs
pid Process 3872 EXCEL.EXE 3872 EXCEL.EXE 2508 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 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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 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 3872 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 8 IoCs
pid Process 3872 EXCEL.EXE 3872 EXCEL.EXE 3872 EXCEL.EXE 3872 EXCEL.EXE 3872 EXCEL.EXE 3872 EXCEL.EXE 3872 EXCEL.EXE 3872 EXCEL.EXE -
Suspicious use of WriteProcessMemory 2 IoCs
description pid Process procid_target PID 3872 wrote to memory of 2508 3872 EXCEL.EXE 55 PID 3872 wrote to memory of 2508 3872 EXCEL.EXE 55
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\2741d6da882c151334cb7777b2f8bf26f8b0e197d244f1aa86570b040f334a76.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:3872 -
C:\Windows\SYSTEM32\rundll32.exerundll32 C:\Users\Admin\JavaObjectReflectX.dll , dopt2⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Loads dropped DLL
PID:2508
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