Overview
overview
10Static
static
8challenge-files.zip
windows7-x64
1challenge-files.zip
windows10-2004-x64
1challenge-...top.gz
windows7-x64
3challenge-...top.gz
windows10-2004-x64
3Stairs.txt
windows7-x64
1Stairs.txt
windows10-2004-x64
1challenge-...sk.txt
windows7-x64
1challenge-...sk.txt
windows10-2004-x64
1challenge-...64.dll
windows7-x64
10challenge-...64.dll
windows10-2004-x64
10challenge-...st.hta
windows7-x64
1challenge-...st.hta
windows10-2004-x64
1challenge-...st.dll
windows7-x64
10challenge-...st.dll
windows10-2004-x64
10challenge-...1.docm
windows7-x64
10challenge-...1.docm
windows10-2004-x64
10challenge-...se.dat
windows7-x64
3challenge-...se.dat
windows10-2004-x64
3Analysis
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max time kernel
150s -
max time network
29s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
27-12-2022 20:22
Behavioral task
behavioral1
Sample
challenge-files.zip
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
challenge-files.zip
Resource
win10v2004-20220812-en
Behavioral task
behavioral3
Sample
challenge-files/challenge-files/2021-06-02-fake-gzip-file-from-supplementik.top.gz
Resource
win7-20221111-en
Behavioral task
behavioral4
Sample
challenge-files/challenge-files/2021-06-02-fake-gzip-file-from-supplementik.top.gz
Resource
win10v2004-20220901-en
Behavioral task
behavioral5
Sample
Stairs.txt
Resource
win7-20220812-en
Behavioral task
behavioral6
Sample
Stairs.txt
Resource
win10v2004-20220812-en
Behavioral task
behavioral7
Sample
challenge-files/challenge-files/2021-06-02-scheduled-task.txt
Resource
win7-20221111-en
Behavioral task
behavioral8
Sample
challenge-files/challenge-files/2021-06-02-scheduled-task.txt
Resource
win10v2004-20221111-en
Behavioral task
behavioral9
Sample
challenge-files/challenge-files/Tetoomdu64.dll
Resource
win7-20221111-en
Behavioral task
behavioral10
Sample
challenge-files/challenge-files/Tetoomdu64.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral11
Sample
challenge-files/challenge-files/collectionBoxConst.hta
Resource
win7-20220901-en
Behavioral task
behavioral12
Sample
challenge-files/challenge-files/collectionBoxConst.hta
Resource
win10v2004-20221111-en
Behavioral task
behavioral13
Sample
challenge-files/challenge-files/collectionBoxConst.dll
Resource
win7-20220812-en
Behavioral task
behavioral14
Sample
challenge-files/challenge-files/collectionBoxConst.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral15
Sample
challenge-files/challenge-files/docs 06.02.2021.docm
Resource
win7-20221111-en
Behavioral task
behavioral16
Sample
challenge-files/challenge-files/docs 06.02.2021.docm
Resource
win10v2004-20221111-en
Behavioral task
behavioral17
Sample
challenge-files/challenge-files/license.dat
Resource
win7-20220812-en
Behavioral task
behavioral18
Sample
challenge-files/challenge-files/license.dat
Resource
win10v2004-20220901-en
General
-
Target
challenge-files/challenge-files/2021-06-02-fake-gzip-file-from-supplementik.top.gz
-
Size
730KB
-
MD5
0208817d1a0a9bd2b5ba9bb87eb934d6
-
SHA1
ba190c8cfba453e163dc0035ece7d3a1c0c4e08f
-
SHA256
ea872a29ed2189432ff3f8ce807412eaa200928fadf9eb918518be5d5bd0ca1e
-
SHA512
2a4c26bee05c2d1f0e5629fa692d3bd41540e04dbc690604c050f72a03cab9bafff7dd4a7ae8587b59fed77211c1c1f278b6a3b860a0ec6c1846199a971174b5
-
SSDEEP
12288:yKKYkbSL7/TaiQmAyBkK2hA2nczTsoQ+g7GuFg5+GAoWv6RbrjUyHzvyTA:xK7SL6LmAyBk1A2nqBsGT5W6RbrjJzKA
Malware Config
Signatures
-
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Modifies registry class 10 IoCs
Processes:
rundll32.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\gz_auto_file\shell rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\gz_auto_file\shell\Read\command rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\gz_auto_file\shell\Read\command\ = "\"C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe\" \"%1\"" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\Local Settings\Software\Microsoft\Windows\Shell\MuiCache rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\gz_auto_file rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\gz_auto_file\ rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\.gz rundll32.exe Set value (str) \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\.gz\ = "gz_auto_file" rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000_CLASSES\gz_auto_file\shell\Read rundll32.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
AcroRd32.exepid process 1156 AcroRd32.exe -
Suspicious use of SetWindowsHookEx 3 IoCs
Processes:
AcroRd32.exepid process 1156 AcroRd32.exe 1156 AcroRd32.exe 1156 AcroRd32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
cmd.exerundll32.exedescription pid process target process PID 1752 wrote to memory of 1912 1752 cmd.exe rundll32.exe PID 1752 wrote to memory of 1912 1752 cmd.exe rundll32.exe PID 1752 wrote to memory of 1912 1752 cmd.exe rundll32.exe PID 1912 wrote to memory of 1156 1912 rundll32.exe AcroRd32.exe PID 1912 wrote to memory of 1156 1912 rundll32.exe AcroRd32.exe PID 1912 wrote to memory of 1156 1912 rundll32.exe AcroRd32.exe PID 1912 wrote to memory of 1156 1912 rundll32.exe AcroRd32.exe
Processes
-
C:\Windows\system32\cmd.execmd /c C:\Users\Admin\AppData\Local\Temp\challenge-files\challenge-files\2021-06-02-fake-gzip-file-from-supplementik.top.gz1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\challenge-files\challenge-files\2021-06-02-fake-gzip-file-from-supplementik.top.gz2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\challenge-files\challenge-files\2021-06-02-fake-gzip-file-from-supplementik.top.gz"3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx