Analysis
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max time kernel
121s -
max time network
123s -
platform
windows10_x64 -
resource
win10-en-20211014 -
submitted
27-10-2021 09:49
Static task
static1
Behavioral task
behavioral1
Sample
PO294232.exe
Resource
win7-en-20211014
Behavioral task
behavioral2
Sample
PO294232.exe
Resource
win10-en-20211014
General
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Target
PO294232.exe
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Size
538KB
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MD5
2ed2d26ee75e5bc46a355c0265dd4719
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SHA1
7d45cf3ded4de7432aaeaac18937e13e567d4e81
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SHA256
192f884438809d6fb01ae0c89c4ccd1fdae62d429e78bdbcc4ff4d28a54049af
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SHA512
a14e8312c283df893daa6222ca9fe15fc87b74d1a1271f5892c78f3362b4f8d41cccccb268827e7a557866a016b9ec927a3e5868de83b53733d74caeb2e99a1d
Malware Config
Extracted
oski
bakas1e.xyz
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:
PO294232.exepid process 4080 PO294232.exe 4080 PO294232.exe 4080 PO294232.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:
PO294232.exedescription pid process target process PID 2776 set thread context of 4080 2776 PO294232.exe PO294232.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:
PO294232.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString PO294232.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1392 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 1392 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
PO294232.exePO294232.execmd.exedescription pid process target process PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 2776 wrote to memory of 4080 2776 PO294232.exe PO294232.exe PID 4080 wrote to memory of 2820 4080 PO294232.exe cmd.exe PID 4080 wrote to memory of 2820 4080 PO294232.exe cmd.exe PID 4080 wrote to memory of 2820 4080 PO294232.exe cmd.exe PID 2820 wrote to memory of 1392 2820 cmd.exe taskkill.exe PID 2820 wrote to memory of 1392 2820 cmd.exe taskkill.exe PID 2820 wrote to memory of 1392 2820 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\PO294232.exe"C:\Users\Admin\AppData\Local\Temp\PO294232.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\PO294232.exe"C:\Users\Admin\AppData\Local\Temp\PO294232.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 4080 & erase C:\Users\Admin\AppData\Local\Temp\PO294232.exe & RD /S /Q C:\\ProgramData\\844842201159027\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 40804⤵
- 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/1392-131-0x0000000000000000-mapping.dmp
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memory/2776-120-0x0000000004EA0000-0x0000000004EA1000-memory.dmpFilesize
4KB
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memory/2776-121-0x0000000005130000-0x0000000005136000-memory.dmpFilesize
24KB
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memory/2776-122-0x0000000007640000-0x0000000007641000-memory.dmpFilesize
4KB
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memory/2776-123-0x00000000077E0000-0x0000000007834000-memory.dmpFilesize
336KB
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memory/2776-115-0x00000000005E0000-0x00000000005E1000-memory.dmpFilesize
4KB
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memory/2776-119-0x0000000004DF0000-0x00000000052EE000-memory.dmpFilesize
5.0MB
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memory/2776-118-0x0000000004ED0000-0x0000000004ED1000-memory.dmpFilesize
4KB
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memory/2776-117-0x00000000052F0000-0x00000000052F1000-memory.dmpFilesize
4KB
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memory/2820-130-0x0000000000000000-mapping.dmp
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memory/4080-124-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4080-125-0x000000000040717B-mapping.dmp
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memory/4080-126-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB