Ransomware · Ransomworm · Worm
WannaCry - invoice_greenanimals.pdf.exe
- Author
- Moise Medici
- Updated
- 15 Feb 2026 · Completed
- Difficulty
- Medium
- Platform
- Capabilities
- Tags
Question 4
Another relatively easy question to answer is question 4, which only requires to open the sample in pestudio and extract the resource. To do that, in the section Resources → [Right-click on the entry] → Instance → Dump to File. Save the dump. Opening the new file, it is possible to see that it is a .exe and it has an additional resource attached.
Loading the file with DetectItEasy shows that it is a password-protected zip: Zip(2.0)[encrypted,55.8%,36 files]. The password is not yet known, but if it is unzipped with a random password, some of the file names in the target directory become visible:
dump
- b.wnry
- c.wnry
- f.wnry
msg
- m_bulgarian.wnry
- m_chinese (simplified).wnry
- m_chinese (traditional).wnry
- m_croatian.wnry
- m_czech.wnry
- m_danish.wnry
- m_dutch.wnry
- m_english.wnry
- m_filipino.wnry
- m_finnish.wnry
- m_french.wnry
- m_german.wnry
- m_greek.wnry
- m_indonesian.wnry
- m_italian.wnry
- m_japanese.wnry
- m_korean.wnry
- m_latvian.wnry
- m_norwegian.wnry
- m_polish.wnry
- m_portuguese.wnry
- m_romanian.wnry
- m_russian.wnry
- m_slovak.wnry
- m_spanish.wnry
- m_swedish.wnry
- m_turkish.wnry
- m_vietnamese.wnry
- r.wnry
- s.wnry
- t.wnry
- taskdl.exe
- taskse.exe
- u.wnry
The content above matches with the path found above: %ProgramData%\pafhcsxxsfdrw600. This directory actually exists and contains quite a few files:
pafhcsxxsfdrw600
- 00000000.eky
- 00000000.pky
- 00000000.res
- @ Please_Read_Me@.txt
- @ WanaDecryptor@.exe
- @ WanaDecryptor@.exe.lnk
- b.wnry
- c.wnry
- f.wnry
msg
- m_bulgarian.wnry
- m_chinese (simplified).wnry
- m_chinese (traditional).wnry
- m_croatian.wnry
- m_czech.wnry
- m_danish.wnry
- m_dutch.wnry
- m_english.wnry
- m_filipino.wnry
- m_finnish.wnry
- m_french.wnry
- m_german.wnry
- m_greek.wnry
- m_indonesian.wnry
- m_italian.wnry
- m_japanese.wnry
- m_korean.wnry
- m_latvian.wnry
- m_norwegian.wnry
- m_polish.wnry
- m_portuguese.wnry
- m_romanian.wnry
- m_russian.wnry
- m_slovak.wnry
- m_spanish.wnry
- m_swedish.wnry
- m_turkish.wnry
- m_vietnamese.wnry
- r.wnry
- s.wnry
- t.wnry
TaskData
Data
Tor/
- …
Tor
- libeay32.dll
- libevent-2-0-5.dll
- libevent_core-2-0-5.dll
- libevent_extra-2-0-5.dll
- libgcc_s_sjlj-1.dll
- libssp-0.dll
- ssleay32.dll
- taskhsvc.exe
- tor.exe
- zlib1.dll
- taskdl.exe
- tasksche.exe
- taskse.exe
- u.wnry
Note that tasksche.exe is present here but not in the original zip.
One answer has been given, but two new questions come to mind.
Continuing with question 7, filtering for “Path contains qeriuwjhrf” or “CommandLine contains qeriuwjhrf” in Procmon has not returned any value. The Regshot results are also not showing it. So that will be postponed for the code analysis.
Moving on to question 8, this currently has the same answer as question 7. In Procmon, values for mssecsvc can be seen since one of the services created has that name; however, nothing directly related to mssecsvc.exe has been found yet.