Analysis
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max time kernel
110s -
max time network
123s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
15-11-2021 21:42
Static task
static1
Behavioral task
behavioral1
Sample
77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe
Resource
win7-en-20211104
Behavioral task
behavioral2
Sample
77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe
Resource
win10-en-20211014
General
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Target
77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe
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Size
29.8MB
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MD5
f24c1c3b8d39e6e7a6d765c6ef69f8fd
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SHA1
c3aba9eeeaa4b4ddadea83a6327826e81187d222
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SHA256
77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3
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SHA512
c4102d32a2232d8d5844b080cf75c51419c5f276a33cc9cc1c707796ddfc0a670cffb07d494a0641a102a3fdd4f74424105eebec6ad9bf70ea4a3955fc89bb6f
Malware Config
Extracted
oski
projectblackhat.com
Signatures
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Oski
Oski is an infostealer targeting browser data, crypto wallets.
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Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
ORB.net.exepid process 752 ORB.net.exe -
Loads dropped DLL 3 IoCs
Processes:
ORB.net.exepid process 752 ORB.net.exe 752 ORB.net.exe 752 ORB.net.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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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
ORB.net.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString ORB.net.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 2660 taskkill.exe -
Modifies registry class 2 IoCs
Processes:
77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exeOpenWith.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000_Classes\Local Settings 77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe Key created \REGISTRY\USER\S-1-5-21-941723256-3451054534-3089625102-1000_Classes\Local Settings OpenWith.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 2660 taskkill.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
OpenWith.exepid process 2992 OpenWith.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exeORB.net.execmd.exedescription pid process target process PID 1776 wrote to memory of 752 1776 77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe ORB.net.exe PID 1776 wrote to memory of 752 1776 77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe ORB.net.exe PID 1776 wrote to memory of 752 1776 77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe ORB.net.exe PID 752 wrote to memory of 3516 752 ORB.net.exe cmd.exe PID 752 wrote to memory of 3516 752 ORB.net.exe cmd.exe PID 752 wrote to memory of 3516 752 ORB.net.exe cmd.exe PID 3516 wrote to memory of 2660 3516 cmd.exe taskkill.exe PID 3516 wrote to memory of 2660 3516 cmd.exe taskkill.exe PID 3516 wrote to memory of 2660 3516 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe"C:\Users\Admin\AppData\Local\Temp\77bee09a3541dba878366b1c93835ebbfb316ab0b4487eb9b5f15eaa4c1277c3.exe"1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ORB.net.exe"C:\Users\Admin\AppData\Local\Temp\ORB.net.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /pid 752 & erase C:\Users\Admin\AppData\Local\Temp\ORB.net.exe & RD /S /Q C:\\ProgramData\\719728861698306\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 7524⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\OpenWith.exeC:\Windows\system32\OpenWith.exe -Embedding1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\ORB.net.exeMD5
e67f4583ef6c8cea06288afc539beb88
SHA1dcf6a480ebb9f84b7d6f7f04edd2d8753e7a5e21
SHA256218296d2ac0f8fdff0ff27adf2ee5d196a646c9b6cc2a2f8d60ef04b8f2bb59b
SHA5127051b007b1f810369d6fe9506dd02016dfb016d4a03aa4a2fb2ac71e9a689b4ad707b07089dd1eabc4a7a3a291cab1a6500111e7b0ec8468f970908ff2b06af4
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C:\Users\Admin\AppData\Local\Temp\ORB.net.exeMD5
e67f4583ef6c8cea06288afc539beb88
SHA1dcf6a480ebb9f84b7d6f7f04edd2d8753e7a5e21
SHA256218296d2ac0f8fdff0ff27adf2ee5d196a646c9b6cc2a2f8d60ef04b8f2bb59b
SHA5127051b007b1f810369d6fe9506dd02016dfb016d4a03aa4a2fb2ac71e9a689b4ad707b07089dd1eabc4a7a3a291cab1a6500111e7b0ec8468f970908ff2b06af4
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\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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\ProgramData\sqlite3.dllMD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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memory/752-115-0x0000000000000000-mapping.dmp
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memory/2660-122-0x0000000000000000-mapping.dmp
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memory/3516-121-0x0000000000000000-mapping.dmp