Analysis
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max time kernel
82s -
max time network
121s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
01-05-2021 01:07
Static task
static1
Behavioral task
behavioral1
Sample
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe
Resource
win10v20210410
General
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Target
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe
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Size
54KB
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MD5
a3d964aaf642d626474f02ba3ae4f49b
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SHA1
a4e2deb65f97f657b50e48707b883ce2b138e787
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SHA256
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893
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SHA512
f424466a1019e82a11b3317160f2009c572179355d6a48a42547cb3e57d99eaa4bf3425fc0c002f3be154270abc5ff97e53a39e0c3a7c09db2354ef87de96e4f
Malware Config
Extracted
C:\\README.aeef1a75.TXT
darkside
https://ibb.co/87JcyNT
https://ibb.co/QfBfq0y
https://ibb.co/L5cwM9L
https://ibb.co/Tr6JvBd
https://ibb.co/Wcw1MsD
https://ibb.co/y0GtL0z
https://ibb.co/v1ykbV3
https://ibb.co/G5bLyFj
https://ibb.co/YpY238t
http://darksidc3iux462n6yunevoag52ntvwp6wulaz3zirkmh4cnz6hhj7id.onion/122/primehealthservices/2HL7CQH8SIgjDOC6Drmy91ks9uF-8tH01iNecY1tAkFnQK2c0TEWlOek8biiBK9K
http://dark24zz36xm4y2phwe7yvnkkkkhxionhfrwp67awpb3r3bdcneivoqd.onion/LD73WIA272ABZP7ZPOH20QAECU6KOF3IBL2EVVZVFIQDZSADZFKOCUIYRMBI0PSN
Signatures
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DarkSide
Targeted ransomware first seen in August 2020. Operators steal data to use as leverage.
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Modifies extensions of user files 13 IoCs
Ransomware generally changes the extension on encrypted files.
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process File renamed C:\Users\Admin\Pictures\ConvertFromGroup.raw => C:\Users\Admin\Pictures\ConvertFromGroup.raw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\NewMount.raw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\UnpublishInstall.png.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File renamed C:\Users\Admin\Pictures\OptimizeUse.tiff => C:\Users\Admin\Pictures\OptimizeUse.tiff.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\OptimizeUse.tiff.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File renamed C:\Users\Admin\Pictures\StepSet.raw => C:\Users\Admin\Pictures\StepSet.raw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\StepSet.raw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File renamed C:\Users\Admin\Pictures\UnpublishInstall.png => C:\Users\Admin\Pictures\UnpublishInstall.png.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\ConvertFromGroup.raw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File renamed C:\Users\Admin\Pictures\NewMount.raw => C:\Users\Admin\Pictures\NewMount.raw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\OptimizeUse.tiff bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File renamed C:\Users\Admin\Pictures\WaitProtect.crw => C:\Users\Admin\Pictures\WaitProtect.crw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Users\Admin\Pictures\WaitProtect.crw.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Enumerates connected drives 3 TTPs 2 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exebfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process File opened (read-only) \??\Z: bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened (read-only) \??\Z: bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Drops file in System32 directory 15 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\BAB7F775BADE1EC8628B8D8B4C22C44D bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\counters2.dat bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\644B8874112055B5E195ECB0E8F243A4 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\BAB7F775BADE1EC8628B8D8B4C22C44D bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\644B8874112055B5E195ECB0E8F243A4 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\aeef1a75.BMP" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Modifies Control Panel 2 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop\WallpaperStyle = "10" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Control Panel\Desktop bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Modifies data under HKEY_USERS 13 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (data) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\16\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\OnDemandInterfaceCache bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\USER\.DEFAULT\Control Panel\International bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (str) \REGISTRY\USER\.DEFAULT\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\aeef1a75.BMP" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Modifies registry class 5 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.aeef1a75\ = "aeef1a75" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\aeef1a75\DefaultIcon bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\aeef1a75 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\aeef1a75\DefaultIcon\ = "C:\\ProgramData\\aeef1a75.ico" bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exepid process 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
vssvc.exedescription pid process Token: SeBackupPrivilege 3660 vssvc.exe Token: SeRestorePrivilege 3660 vssvc.exe Token: SeAuditPrivilege 3660 vssvc.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exebfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exedescription pid process target process PID 3064 wrote to memory of 1504 3064 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 3064 wrote to memory of 1504 3064 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 3064 wrote to memory of 1504 3064 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 1504 wrote to memory of 732 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 1504 wrote to memory of 732 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 1504 wrote to memory of 732 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 1504 wrote to memory of 3032 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 1504 wrote to memory of 3032 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe PID 1504 wrote to memory of 3032 1504 bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe"C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe"1⤵PID:1868
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C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe"C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:3064 -
C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe"C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe"2⤵
- Enumerates connected drives
- Drops file in System32 directory
- Sets desktop wallpaper using registry
- Modifies Control Panel
- Modifies data under HKEY_USERS
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1504 -
C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exeC:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -work worker0 job0-15043⤵
- Modifies extensions of user files
PID:732
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C:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exeC:\Users\Admin\AppData\Local\Temp\bfb31c96f9e6285f5bb60433f2e45898b8a7183a2591157dc1d766be16c29893.exe -work worker1 job1-15043⤵
- Enumerates connected drives
PID:3032
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3660