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General
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Target
NEAS.2023-09-05_036b5cf132e734762af8fbf07faf094a_ryuk_JC.exe
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Size
21.6MB
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Sample
231023-xrk5faeh47
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MD5
036b5cf132e734762af8fbf07faf094a
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SHA1
d71e385c7a3e808acfcf63f71291ba74c435b306
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SHA256
e301f19720af26914bd818e738f68ce7d1fa7ccdcd1cbe97b867e2bbf7fbe97e
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SHA512
bd4f1113e9f161edc2aed4c9816779b367bdb68e637178e37a3d26d7e17991b8872020e232c21dbe83485d3f19c19312a5c8a598dd07941834fc91169db04723
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMW:9nwngnwnBR/
Static task
static1
Behavioral task
behavioral1
Sample
NEAS.2023-09-05_036b5cf132e734762af8fbf07faf094a_ryuk_JC.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
NEAS.2023-09-05_036b5cf132e734762af8fbf07faf094a_ryuk_JC.exe
Resource
win10v2004-20231023-en
Malware Config
Targets
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Target
NEAS.2023-09-05_036b5cf132e734762af8fbf07faf094a_ryuk_JC.exe
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Size
21.6MB
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MD5
036b5cf132e734762af8fbf07faf094a
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SHA1
d71e385c7a3e808acfcf63f71291ba74c435b306
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SHA256
e301f19720af26914bd818e738f68ce7d1fa7ccdcd1cbe97b867e2bbf7fbe97e
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SHA512
bd4f1113e9f161edc2aed4c9816779b367bdb68e637178e37a3d26d7e17991b8872020e232c21dbe83485d3f19c19312a5c8a598dd07941834fc91169db04723
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SSDEEP
98304:9E2RpMMHMMMvMMZMMMlmMMMiMMMYJMMHMMM6MMZMMMqNMMzMMMUMMVMMMYJMMzMW:9nwngnwnBR/
Score10/10-
Modifies WinLogon for persistence
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Renames multiple (224) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Renames multiple (93) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops startup file
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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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Drops autorun.inf file
Malware can abuse Windows Autorun to spread further via attached volumes.
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Drops file in System32 directory
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