Analysis
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max time kernel
110s -
max time network
110s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
01-04-2021 13:01
Static task
static1
Behavioral task
behavioral1
Sample
AWB-9899691012.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
AWB-9899691012.exe
Resource
win10v20201028
General
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Target
AWB-9899691012.exe
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Size
708KB
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MD5
ec57669d9ea9b2ce78acd0962dd37761
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SHA1
175f43377e8df78601a8c93a6885025647b95e56
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SHA256
9dbdfcb4749e6e441ca65cf71d75944cf90111832d10b8048b70cfe084b6e675
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SHA512
20a34130753d3bf5249727f80cf2d6f34cc771837b89796fed700e04b76928a98bf81a5433696d6b4e4c29dea9848586fab1b9de7b5eaed214ef67d06ea42d38
Malware Config
Extracted
oski
http://45.85.90.220
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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Loads dropped DLL 3 IoCs
Processes:
AWB-9899691012.exepid process 808 AWB-9899691012.exe 808 AWB-9899691012.exe 808 AWB-9899691012.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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Suspicious use of SetThreadContext 1 IoCs
Processes:
AWB-9899691012.exedescription pid process target process PID 4760 set thread context of 808 4760 AWB-9899691012.exe AWB-9899691012.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:
AWB-9899691012.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString AWB-9899691012.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1424 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
AWB-9899691012.exepid process 4760 AWB-9899691012.exe 4760 AWB-9899691012.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
AWB-9899691012.exetaskkill.exedescription pid process Token: SeDebugPrivilege 4760 AWB-9899691012.exe Token: SeDebugPrivilege 1424 taskkill.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
AWB-9899691012.exeAWB-9899691012.execmd.exedescription pid process target process PID 4760 wrote to memory of 644 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 644 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 644 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 4760 wrote to memory of 808 4760 AWB-9899691012.exe AWB-9899691012.exe PID 808 wrote to memory of 1168 808 AWB-9899691012.exe cmd.exe PID 808 wrote to memory of 1168 808 AWB-9899691012.exe cmd.exe PID 808 wrote to memory of 1168 808 AWB-9899691012.exe cmd.exe PID 1168 wrote to memory of 1424 1168 cmd.exe taskkill.exe PID 1168 wrote to memory of 1424 1168 cmd.exe taskkill.exe PID 1168 wrote to memory of 1424 1168 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe"C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe"C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe"C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe"2⤵
- 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 808 & erase C:\Users\Admin\AppData\Local\Temp\AWB-9899691012.exe & RD /S /Q C:\\ProgramData\\942405186281420\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 8084⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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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/808-13-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/808-15-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/808-14-0x000000000040717B-mapping.dmp
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memory/1168-19-0x0000000000000000-mapping.dmp
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memory/1424-20-0x0000000000000000-mapping.dmp
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memory/4760-7-0x0000000004D90000-0x0000000004D91000-memory.dmpFilesize
4KB
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memory/4760-12-0x0000000005220000-0x0000000005280000-memory.dmpFilesize
384KB
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memory/4760-11-0x0000000005010000-0x0000000005011000-memory.dmpFilesize
4KB
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memory/4760-10-0x0000000004CE0000-0x0000000004CE9000-memory.dmpFilesize
36KB
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memory/4760-9-0x0000000004EF0000-0x0000000004EF1000-memory.dmpFilesize
4KB
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memory/4760-8-0x0000000004C20000-0x0000000004C21000-memory.dmpFilesize
4KB
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memory/4760-2-0x00000000732D0000-0x00000000739BE000-memory.dmpFilesize
6.9MB
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memory/4760-6-0x0000000005290000-0x0000000005291000-memory.dmpFilesize
4KB
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memory/4760-5-0x0000000004CF0000-0x0000000004CF1000-memory.dmpFilesize
4KB
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memory/4760-3-0x0000000000210000-0x0000000000211000-memory.dmpFilesize
4KB