Analysis
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max time kernel
142s -
max time network
143s -
platform
windows10_x64 -
resource
win10v20201028 -
submitted
06-04-2021 12:39
Static task
static1
Behavioral task
behavioral1
Sample
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe
Resource
win10v20201028
General
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Target
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe
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Size
684KB
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MD5
b53c91938416807d1ee5a408c5b2a636
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SHA1
2bd54114bccd24abf158ee1b5ae1e77a238f4bc1
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SHA256
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7
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SHA512
855ffa525e36e9406d8c4ee9c148effe994c1e513ea498757ef91918d93c2c9a33ffdce457b31754c8cf65577caa012320ccd450bdc82cac6963b0dbed110dac
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:
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exepid process 3576 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 3576 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 3576 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.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:
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exedescription pid process target process PID 8 set thread context of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.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:
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 3968 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exepid process 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exetaskkill.exedescription pid process Token: SeDebugPrivilege 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe Token: SeDebugPrivilege 3968 taskkill.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.execmd.exedescription pid process target process PID 8 wrote to memory of 2828 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 2828 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 2828 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 2532 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 2532 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 2532 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 8 wrote to memory of 3576 8 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe PID 3576 wrote to memory of 2088 3576 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe cmd.exe PID 3576 wrote to memory of 2088 3576 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe cmd.exe PID 3576 wrote to memory of 2088 3576 791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe cmd.exe PID 2088 wrote to memory of 3968 2088 cmd.exe taskkill.exe PID 2088 wrote to memory of 3968 2088 cmd.exe taskkill.exe PID 2088 wrote to memory of 3968 2088 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe"C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.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\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe"C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe"C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.exe"C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376ad5ea955b049c5dac7.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 3576 & erase C:\Users\Admin\AppData\Local\Temp\791d39e806357e832c5aa1043ebdfe95c90ffe41f20376' & RD /S /Q C:\\ProgramData\\609573751219310\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 35764⤵
- 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/8-11-0x0000000005790000-0x0000000005791000-memory.dmpFilesize
4KB
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memory/8-6-0x00000000059E0000-0x00000000059E1000-memory.dmpFilesize
4KB
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memory/8-8-0x0000000005400000-0x0000000005401000-memory.dmpFilesize
4KB
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memory/8-9-0x00000000057A0000-0x00000000057A1000-memory.dmpFilesize
4KB
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memory/8-10-0x00000000054F0000-0x00000000054F9000-memory.dmpFilesize
36KB
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memory/8-2-0x0000000073940000-0x000000007402E000-memory.dmpFilesize
6.9MB
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memory/8-12-0x0000000005970000-0x00000000059D0000-memory.dmpFilesize
384KB
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memory/8-3-0x0000000000B50000-0x0000000000B51000-memory.dmpFilesize
4KB
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memory/8-5-0x0000000005410000-0x0000000005411000-memory.dmpFilesize
4KB
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memory/8-7-0x0000000005580000-0x0000000005581000-memory.dmpFilesize
4KB
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memory/2088-19-0x0000000000000000-mapping.dmp
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memory/3576-15-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3576-14-0x000000000040717B-mapping.dmp
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memory/3576-13-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3968-20-0x0000000000000000-mapping.dmp