General
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Target
2024-02-18_4ba6b0d4fc46d595e1b59a965a0044a4_gazer_ryuk
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Size
6.1MB
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Sample
240218-p172kaaf87
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MD5
4ba6b0d4fc46d595e1b59a965a0044a4
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SHA1
55e5e00cac5a78d51d370b347d1982288151d553
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SHA256
6976ffaa2deac082dedcd30e2ecb2faa86e5361d1c22d6678baf44985ef217ce
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SHA512
768d350c06bac0a07b11d076bbc8164d8bd0fe48263fa7848ec13c856d6d46513754ba3f2bd87ce5717904b70a0e2efe5d7f66ef604c83286b3c6f9853f48c6f
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SSDEEP
98304:ilLAB1vqhIQD/u9LkqFle1Gui16ZEXiZTslVw53gcbj:is0IQq9LjFlk53gc
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-18_4ba6b0d4fc46d595e1b59a965a0044a4_gazer_ryuk.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-18_4ba6b0d4fc46d595e1b59a965a0044a4_gazer_ryuk.exe
Resource
win10v2004-20231215-en
Malware Config
Extracted
\Device\HarddiskVolume1\HOW TO RESTORE FILES.txt
targetcompany
http://wtyafjyhwqrgo4a45wdvvwhen3cx4euie73qvlhkhvlrexljoyuklaad.onion/mallox/privateSignin
http://wtyafjyhwqrgo4a45wdvvwhen3cx4euie73qvlhkhvlrexljoyuklaad.onion
Extracted
C:\Users\Admin\Contacts\HOW TO RESTORE FILES.txt
targetcompany
http://wtyafjyhwqrgo4a45wdvvwhen3cx4euie73qvlhkhvlrexljoyuklaad.onion/mallox/privateSignin
http://wtyafjyhwqrgo4a45wdvvwhen3cx4euie73qvlhkhvlrexljoyuklaad.onion
Targets
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Target
2024-02-18_4ba6b0d4fc46d595e1b59a965a0044a4_gazer_ryuk
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Size
6.1MB
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MD5
4ba6b0d4fc46d595e1b59a965a0044a4
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SHA1
55e5e00cac5a78d51d370b347d1982288151d553
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SHA256
6976ffaa2deac082dedcd30e2ecb2faa86e5361d1c22d6678baf44985ef217ce
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SHA512
768d350c06bac0a07b11d076bbc8164d8bd0fe48263fa7848ec13c856d6d46513754ba3f2bd87ce5717904b70a0e2efe5d7f66ef604c83286b3c6f9853f48c6f
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SSDEEP
98304:ilLAB1vqhIQD/u9LkqFle1Gui16ZEXiZTslVw53gcbj:is0IQq9LjFlk53gc
Score10/10-
TargetCompany,Mallox
TargetCompany (aka Mallox) is a ransomware which encrypts files using a combination of ChaCha20, AES-128, and Curve25519, first seen in June 2021.
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Modifies boot configuration data using bcdedit
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Renames multiple (7264) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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