Analysis
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max time kernel
45s -
max time network
113s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
03-05-2021 06:10
Static task
static1
Behavioral task
behavioral1
Sample
2b4a1bcc464360c350c05bf9fbb18ce3.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
2b4a1bcc464360c350c05bf9fbb18ce3.exe
Resource
win10v20210410
General
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Target
2b4a1bcc464360c350c05bf9fbb18ce3.exe
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Size
224KB
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MD5
2b4a1bcc464360c350c05bf9fbb18ce3
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SHA1
62ddaabfa34733a114afd3668c29feaf9dc96502
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SHA256
37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3
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SHA512
a230b489936b0c1b90922f9e49f02bf8addf605923ba0b5e92633ee93fd34eec6f479e4e995ddb6149aae461d262d396d5d20bf45e88f41a8f14bb762d9c420f
Malware Config
Extracted
oski
31.210.20.238
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:
2b4a1bcc464360c350c05bf9fbb18ce3.exepid process 3548 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3548 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3548 2b4a1bcc464360c350c05bf9fbb18ce3.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:
2b4a1bcc464360c350c05bf9fbb18ce3.exedescription pid process target process PID 3200 set thread context of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.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:
2b4a1bcc464360c350c05bf9fbb18ce3.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 2b4a1bcc464360c350c05bf9fbb18ce3.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 3988 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
Processes:
2b4a1bcc464360c350c05bf9fbb18ce3.exepid process 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
2b4a1bcc464360c350c05bf9fbb18ce3.exetaskkill.exedescription pid process Token: SeDebugPrivilege 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe Token: SeDebugPrivilege 3988 taskkill.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
2b4a1bcc464360c350c05bf9fbb18ce3.exe2b4a1bcc464360c350c05bf9fbb18ce3.execmd.exedescription pid process target process PID 3200 wrote to memory of 1540 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 1540 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 1540 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3200 wrote to memory of 3548 3200 2b4a1bcc464360c350c05bf9fbb18ce3.exe 2b4a1bcc464360c350c05bf9fbb18ce3.exe PID 3548 wrote to memory of 3724 3548 2b4a1bcc464360c350c05bf9fbb18ce3.exe cmd.exe PID 3548 wrote to memory of 3724 3548 2b4a1bcc464360c350c05bf9fbb18ce3.exe cmd.exe PID 3548 wrote to memory of 3724 3548 2b4a1bcc464360c350c05bf9fbb18ce3.exe cmd.exe PID 3724 wrote to memory of 3988 3724 cmd.exe taskkill.exe PID 3724 wrote to memory of 3988 3724 cmd.exe taskkill.exe PID 3724 wrote to memory of 3988 3724 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2b4a1bcc464360c350c05bf9fbb18ce3.exe"C:\Users\Admin\AppData\Local\Temp\2b4a1bcc464360c350c05bf9fbb18ce3.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\2b4a1bcc464360c350c05bf9fbb18ce3.exeC:\Users\Admin\AppData\Local\Temp\2b4a1bcc464360c350c05bf9fbb18ce3.exe2⤵
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C:\Users\Admin\AppData\Local\Temp\2b4a1bcc464360c350c05bf9fbb18ce3.exeC:\Users\Admin\AppData\Local\Temp\2b4a1bcc464360c350c05bf9fbb18ce3.exe2⤵
- 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 3548 & erase C:\Users\Admin\AppData\Local\Temp\2b4a1bcc464360c350c05bf9fbb18ce3.exe & RD /S /Q C:\\ProgramData\\093483247800150\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 35484⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
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/3200-121-0x0000000005C10000-0x0000000005C2C000-memory.dmpFilesize
112KB
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memory/3200-119-0x0000000004B70000-0x0000000004B71000-memory.dmpFilesize
4KB
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memory/3200-120-0x0000000005A90000-0x0000000005A91000-memory.dmpFilesize
4KB
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memory/3200-114-0x0000000000260000-0x0000000000261000-memory.dmpFilesize
4KB
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memory/3200-118-0x00000000051A0000-0x00000000051A1000-memory.dmpFilesize
4KB
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memory/3200-117-0x00000000008B0000-0x00000000008B2000-memory.dmpFilesize
8KB
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memory/3200-116-0x0000000004C90000-0x0000000004C91000-memory.dmpFilesize
4KB
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memory/3548-122-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3548-123-0x000000000040717B-mapping.dmp
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memory/3548-124-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3724-128-0x0000000000000000-mapping.dmp
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memory/3988-129-0x0000000000000000-mapping.dmp