Analysis
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max time kernel
138s -
max time network
138s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
21-01-2021 11:33
Behavioral task
behavioral1
Sample
sample20210121-01.xlsm
Resource
win7v20201028
General
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Target
sample20210121-01.xlsm
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Size
30KB
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MD5
d89d70ee6809ef93910bfbf10c4caf94
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SHA1
5e8d4db8464fd6d427d5987ae6cb017ceac13839
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SHA256
55cbb43aad59d149ba4bc06684771b5d87a3f570da165437c4d07d442d4b8db7
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SHA512
c5eb5a46edb4cf9a7eeeb7e945665f9091d2b536310d5e4de54d47fca8690821c28c004a4677daae1273911f8e60d467cd8424f2e7e23e12f20ac589bb6d5073
Malware Config
Extracted
dridex
10444
194.225.58.214:443
211.110.44.63:5353
69.164.207.140:3388
198.57.200.100:3786
Signatures
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Process spawned unexpected child process 2 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
regsvr32.exeregsvr32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 3328 640 regsvr32.exe EXCEL.EXE Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 4048 640 regsvr32.exe EXCEL.EXE -
Processes:
resource yara_rule behavioral2/memory/3716-12-0x00000000734C0000-0x00000000734FD000-memory.dmp dridex_ldr behavioral2/memory/3716-13-0x00000000734C0000-0x00000000734FD000-memory.dmp dridex_ldr behavioral2/memory/3716-15-0x00000000734C0000-0x00000000734FD000-memory.dmp dridex_ldr -
Loads dropped DLL 1 IoCs
Processes:
regsvr32.exepid process 3716 regsvr32.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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
EXCEL.EXEdescription 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
Processes:
EXCEL.EXEpid process 640 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE 640 EXCEL.EXE -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
EXCEL.EXEregsvr32.exedescription pid process target process PID 640 wrote to memory of 3328 640 EXCEL.EXE regsvr32.exe PID 640 wrote to memory of 3328 640 EXCEL.EXE regsvr32.exe PID 640 wrote to memory of 4048 640 EXCEL.EXE regsvr32.exe PID 640 wrote to memory of 4048 640 EXCEL.EXE regsvr32.exe PID 4048 wrote to memory of 3716 4048 regsvr32.exe regsvr32.exe PID 4048 wrote to memory of 3716 4048 regsvr32.exe regsvr32.exe PID 4048 wrote to memory of 3716 4048 regsvr32.exe regsvr32.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\sample20210121-01.xlsm"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\regsvr32.exe"C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\jgcjr.dll2⤵
- Process spawned unexpected child process
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C:\Windows\System32\regsvr32.exe"C:\Windows\System32\regsvr32.exe" -s C:\Users\Admin\AppData\Local\Temp\jgcjr.dll2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe-s C:\Users\Admin\AppData\Local\Temp\jgcjr.dll3⤵
- Loads dropped DLL
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\jgcjr.dllMD5
b987ba911cf1217e83778e71df3182c8
SHA1842bcedd76890326ca5552010c5c3dc9d0b4c0e7
SHA256a9653dacc87403855ff752ff34c6913f5c4f0aec5bfe2c83f95151c9e13d5ba4
SHA512ed5ed5028549ba0b9877b9524ad70e24e49c30fd43076e13bc20a8b92c3d7bdba11219607fd7487b6650842b02f4e22f723657491acafd292cb363232e069844
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\Users\Admin\AppData\Local\Temp\jgcjr.dllMD5
b987ba911cf1217e83778e71df3182c8
SHA1842bcedd76890326ca5552010c5c3dc9d0b4c0e7
SHA256a9653dacc87403855ff752ff34c6913f5c4f0aec5bfe2c83f95151c9e13d5ba4
SHA512ed5ed5028549ba0b9877b9524ad70e24e49c30fd43076e13bc20a8b92c3d7bdba11219607fd7487b6650842b02f4e22f723657491acafd292cb363232e069844
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memory/640-5-0x00007FFC11220000-0x00007FFC11230000-memory.dmpFilesize
64KB
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memory/640-2-0x00007FFC11220000-0x00007FFC11230000-memory.dmpFilesize
64KB
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memory/640-6-0x00007FFC342F0000-0x00007FFC34927000-memory.dmpFilesize
6.2MB
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memory/640-4-0x00007FFC11220000-0x00007FFC11230000-memory.dmpFilesize
64KB
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memory/640-3-0x00007FFC11220000-0x00007FFC11230000-memory.dmpFilesize
64KB
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memory/3328-7-0x0000000000000000-mapping.dmp
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memory/3716-10-0x0000000000000000-mapping.dmp
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memory/3716-12-0x00000000734C0000-0x00000000734FD000-memory.dmpFilesize
244KB
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memory/3716-13-0x00000000734C0000-0x00000000734FD000-memory.dmpFilesize
244KB
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memory/3716-14-0x00000000011C0000-0x00000000011C1000-memory.dmpFilesize
4KB
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memory/3716-15-0x00000000734C0000-0x00000000734FD000-memory.dmpFilesize
244KB
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memory/4048-8-0x0000000000000000-mapping.dmp