Analysis
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max time kernel
48s -
max time network
66s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
06-07-2021 09:01
Static task
static1
Behavioral task
behavioral1
Sample
8325e7768964ebee192622a378e7f28f.exe
Resource
win7v20210410
General
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Target
8325e7768964ebee192622a378e7f28f.exe
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Size
747KB
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MD5
8325e7768964ebee192622a378e7f28f
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SHA1
47ad27a29e5d3c8449fe41287bc3957bb8c37aff
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SHA256
bef42b4bb33bf2edb112d4e084df6e7aaad37b429b00ac783b9fe14eb08ac3f6
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SHA512
ba2fd924cd43d9fd4dce8956e22dbe8e33c11fe35e8acf5262dd18e102a6dcf49e931dd532f96a759e87ebccc00d55255aac67c438fb689a2ea41f6cdcf0e465
Malware Config
Extracted
oski
http://37.0.11.237/nn/
Signatures
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Oski
Oski is an infostealer targeting browser data, crypto wallets.
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Looks for VirtualBox Guest Additions in registry 2 TTPs
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Downloads MZ/PE file
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Looks for VMWare Tools registry key 2 TTPs
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Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
8325e7768964ebee192622a378e7f28f.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion 8325e7768964ebee192622a378e7f28f.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion 8325e7768964ebee192622a378e7f28f.exe -
Loads dropped DLL 3 IoCs
Processes:
8325e7768964ebee192622a378e7f28f.exepid process 2116 8325e7768964ebee192622a378e7f28f.exe 2116 8325e7768964ebee192622a378e7f28f.exe 2116 8325e7768964ebee192622a378e7f28f.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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Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
Processes:
8325e7768964ebee192622a378e7f28f.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum 8325e7768964ebee192622a378e7f28f.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum\0 8325e7768964ebee192622a378e7f28f.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
8325e7768964ebee192622a378e7f28f.exedescription pid process target process PID 4020 set thread context of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe -
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:
8325e7768964ebee192622a378e7f28f.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 8325e7768964ebee192622a378e7f28f.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 2544 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
8325e7768964ebee192622a378e7f28f.exepid process 4020 8325e7768964ebee192622a378e7f28f.exe 4020 8325e7768964ebee192622a378e7f28f.exe 4020 8325e7768964ebee192622a378e7f28f.exe 4020 8325e7768964ebee192622a378e7f28f.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
8325e7768964ebee192622a378e7f28f.exetaskkill.exedescription pid process Token: SeDebugPrivilege 4020 8325e7768964ebee192622a378e7f28f.exe Token: SeDebugPrivilege 2544 taskkill.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
8325e7768964ebee192622a378e7f28f.exe8325e7768964ebee192622a378e7f28f.execmd.exedescription pid process target process PID 4020 wrote to memory of 4036 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 4036 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 4036 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2032 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2032 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2032 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 4020 wrote to memory of 2116 4020 8325e7768964ebee192622a378e7f28f.exe 8325e7768964ebee192622a378e7f28f.exe PID 2116 wrote to memory of 1048 2116 8325e7768964ebee192622a378e7f28f.exe cmd.exe PID 2116 wrote to memory of 1048 2116 8325e7768964ebee192622a378e7f28f.exe cmd.exe PID 2116 wrote to memory of 1048 2116 8325e7768964ebee192622a378e7f28f.exe cmd.exe PID 1048 wrote to memory of 2544 1048 cmd.exe taskkill.exe PID 1048 wrote to memory of 2544 1048 cmd.exe taskkill.exe PID 1048 wrote to memory of 2544 1048 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"1⤵
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4020 -
C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"2⤵PID:4036
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C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"2⤵PID:2032
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C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe"2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
PID:2116 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /pid 2116 & erase C:\Users\Admin\AppData\Local\Temp\8325e7768964ebee192622a378e7f28f.exe & RD /S /Q C:\\ProgramData\\176971493033401\\* & exit3⤵
- Suspicious use of WriteProcessMemory
PID:1048 -
C:\Windows\SysWOW64\taskkill.exetaskkill /pid 21164⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2544
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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MD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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MD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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MD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c