Analysis
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max time kernel
124s -
max time network
145s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
04-10-2022 19:20
Static task
static1
Behavioral task
behavioral1
Sample
Purchase Order.pdf.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
Purchase Order.pdf.exe
Resource
win10v2004-20220901-en
General
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Target
Purchase Order.pdf.exe
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Size
273KB
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MD5
bb5ce7931695bdec6adf8bdc1a674a14
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SHA1
ac678662e2dc124111cee4ff9f180b87a8b7f2c0
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SHA256
371384518223a80ff5381a728ba1e4f846c93713bb39bc80fb2d95cdd8158241
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SHA512
1bde736bcafc95da870d1a51022c03de359d66b65000c50a73a070256b2fc3c971f02d70a029e1e380d544cc85eb6564bba75b2f5ea78aefac42431eabeafe7a
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SSDEEP
6144:cVP0JqJ1ped5HIf7SwKCcdo1L6BQgyZVLa0pOxWW6krZKy:u0JqJenHIfnTcdnhyZVLXOwW6ktKy
Malware Config
Extracted
oski
�&C
o.oteqprojects.co.in
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:
Purchase Order.pdf.exepid process 2036 Purchase Order.pdf.exe 2036 Purchase Order.pdf.exe 2036 Purchase Order.pdf.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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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
Purchase Order.pdf.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\windows.dll = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe" Purchase Order.pdf.exe -
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 2 IoCs
Processes:
Purchase Order.pdf.exePurchase Order.pdf.exedescription pid process target process PID 1884 set thread context of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 set thread context of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.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:
Purchase Order.pdf.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString Purchase Order.pdf.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1752 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 1752 taskkill.exe -
Suspicious use of WriteProcessMemory 29 IoCs
Processes:
Purchase Order.pdf.exePurchase Order.pdf.exePurchase Order.pdf.execmd.exedescription pid process target process PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1884 wrote to memory of 1780 1884 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 1780 wrote to memory of 2036 1780 Purchase Order.pdf.exe Purchase Order.pdf.exe PID 2036 wrote to memory of 568 2036 Purchase Order.pdf.exe cmd.exe PID 2036 wrote to memory of 568 2036 Purchase Order.pdf.exe cmd.exe PID 2036 wrote to memory of 568 2036 Purchase Order.pdf.exe cmd.exe PID 2036 wrote to memory of 568 2036 Purchase Order.pdf.exe cmd.exe PID 568 wrote to memory of 1752 568 cmd.exe taskkill.exe PID 568 wrote to memory of 1752 568 cmd.exe taskkill.exe PID 568 wrote to memory of 1752 568 cmd.exe taskkill.exe PID 568 wrote to memory of 1752 568 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe"2⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe"C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe"3⤵
- 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 2036 & erase C:\Users\Admin\AppData\Local\Temp\Purchase Order.pdf.exe & RD /S /Q C:\\ProgramData\\806887364164302\\* & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 20365⤵
- 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.dllFilesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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\ProgramData\nss3.dllFilesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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\ProgramData\sqlite3.dllFilesize
630KB
MD5e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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memory/568-87-0x0000000000000000-mapping.dmp
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memory/1752-89-0x0000000000000000-mapping.dmp
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memory/1780-80-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-54-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-65-0x0000000076321000-0x0000000076323000-memory.dmpFilesize
8KB
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memory/1780-63-0x0000000000401110-mapping.dmp
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memory/1780-62-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-67-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-66-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-55-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-57-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-58-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-59-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/1780-60-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/2036-69-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-77-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-81-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-83-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-78-0x000000000040717B-mapping.dmp
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memory/2036-73-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-75-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-68-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-88-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2036-71-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB