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Error [deobfuscator.py:2990 process_file(**vars(args))]: #78

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JA1E0 opened this issue Feb 26, 2021 · 2 comments
Open

Error [deobfuscator.py:2990 process_file(**vars(args))]: #78

JA1E0 opened this issue Feb 26, 2021 · 2 comments
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@JA1E0
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JA1E0 commented Feb 26, 2021


When analyzing a malicious document with version 0.1.7, analysis proceeds until...
xlmdeobfuscator.exe -f D:\malware\white\ecaaab9e2fc089eefb6accae9750ac60.bin

      _        _______

|\ /|( \ ( )
( \ / )| ( | () () |
\ () / | | | || || |
) _ ( | | | |(
)| |
/ ( ) \ | | | | | |
( / \ )| (/| ) ( |
|/ |(
___/|/ |


( __ \ ( ____ ( ___ )( ___ \ ( ____ |\ /|( ____ ( ____ ( ___ )__ /( ___ )( ____ )
| ( \ )| ( /| ( ) || ( ) )| ( /| ) ( || ( /| ( /| ( ) | ) ( | ( ) || ( )|
| | ) || (
| | | || (/ / | ( | | | || (_____ | | | () | | | | | | || ()|
| | | || ) | | | || __ ( | ) | | | |(_ )| | | ___ | | | | | | || )
| | ) || ( | | | || ( \ \ | ( | | | | ) || | | ( ) | | | | | | || (\ (
| (
/ )| (
/| () || )) )| ) | () |/_) || (/| ) ( | | | | () || ) \ _
(
/ (/()|/ ___/ |/ ()_)(/|/ | )( (____)|/ _/

XLMMacroDeobfuscator(v0.1.7) - https://github.com/DissectMalware/XLMMacroDeobfuscator

File: D:\malware\ecaaab9e2fc089eefb6accae9750ac60.bin

Unencrypted xls file

[Loading Cells]
Error [deobfuscator.py:2990 process_file(**vars(args))]:

========
MD5: ecaaab9e2fc089eefb6accae9750ac60

@DissectMalware
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DissectMalware commented Feb 26, 2021

Fixed an issue in xlrd2 project (DissectMalware/xlrd2@91bcd84)

Please update xlrd2:

pip install -U https://github.com/DissectMalware/xlrd2/archive/master.zip --force

Then you should see this:
image

The output seems to be incomplete. The inner if block in z6 formula caused the interpreter loop detection logic to mark it as a loop; thus, halting the interpretation

using -x (to extract raw formula)

image

@DissectMalware DissectMalware self-assigned this Feb 26, 2021
@DissectMalware DissectMalware added the bug Something isn't working label Feb 26, 2021
@doomedraven
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thanks this also fixed error for me, upgrading the xlrd2

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