Analysis
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max time kernel
64s -
max time network
119s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
19-11-2021 16:46
Static task
static1
Behavioral task
behavioral1
Sample
NEW.exe
Resource
win7-en-20211104
Behavioral task
behavioral2
Sample
NEW.exe
Resource
win10-en-20211014
General
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Target
NEW.exe
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Size
200KB
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MD5
320329dc62b4db96ba0b0cab347601de
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SHA1
1c362e00c620b975c41c3b0db8815bf2379c5f21
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SHA256
b221129b7a885377264e070750a5ad6a5ca01426df99777f15a89f438a143211
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SHA512
8f5935ae264ed0199690ee9693642d35bedc34aa1803009d6ada5bc12be6dc3c72d0c5c0f2d6172610d4540cc6fcdd5d6b0b0e0dc3fe9f5fabdd9a81666b24ba
Malware Config
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:
NEW.exepid process 1044 NEW.exe 1044 NEW.exe 1044 NEW.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:
NEW.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString NEW.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 676 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 676 taskkill.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
NEW.execmd.exedescription pid process target process PID 1044 wrote to memory of 2408 1044 NEW.exe cmd.exe PID 1044 wrote to memory of 2408 1044 NEW.exe cmd.exe PID 1044 wrote to memory of 2408 1044 NEW.exe cmd.exe PID 2408 wrote to memory of 676 2408 cmd.exe taskkill.exe PID 2408 wrote to memory of 676 2408 cmd.exe taskkill.exe PID 2408 wrote to memory of 676 2408 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\NEW.exe"C:\Users\Admin\AppData\Local\Temp\NEW.exe"1⤵
- 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 1044 & erase C:\Users\Admin\AppData\Local\Temp\NEW.exe & RD /S /Q C:\\ProgramData\\413064910599250\\* & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 10443⤵
- 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/676-119-0x0000000000000000-mapping.dmp
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memory/2408-118-0x0000000000000000-mapping.dmp