Analysis
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max time kernel
142s -
max time network
145s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
22-09-2022 22:30
Static task
static1
Behavioral task
behavioral1
Sample
PURCHASE ORDER.pdf.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
PURCHASE ORDER.pdf.exe
Resource
win10v2004-20220812-en
General
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Target
PURCHASE ORDER.pdf.exe
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Size
273KB
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MD5
3304d0b6d7ce20ce511c4a90b76f3a3c
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SHA1
88195ea442c55fcf8e735c5525498e0b63107f0c
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SHA256
487723e00df8d7f8bfdb57614fa32001f2addc6be9576005b04f1dff53710634
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SHA512
130d5f5adbc5bcc4f64116e851249de7271c6ac34f706afe7e2aa9be62bfa680471c17c947806324ed1ab528cec511172f46b86ab2e7134ad4f44c948b286034
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SSDEEP
6144:EVP0JqJ1pemf6mr5GRNoQ0kk8MMXSZ7Vl9Fnog3Fpc9QI/3We:m0JqJe46fRNC3qSNf3ndrW/3We
Malware Config
Extracted
oski
�&C
v.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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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
PURCHASE ORDER.pdf.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation PURCHASE ORDER.pdf.exe -
Loads dropped DLL 3 IoCs
Processes:
PURCHASE ORDER.pdf.exepid process 4180 PURCHASE ORDER.pdf.exe 4180 PURCHASE ORDER.pdf.exe 4180 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-1-5-21-2295526160-1155304984-640977766-1000\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 2732 set thread context of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 set thread context of 4180 4316 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 3172 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 3172 taskkill.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
PURCHASE ORDER.pdf.exePURCHASE ORDER.pdf.exePURCHASE ORDER.pdf.execmd.exedescription pid process target process PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 2732 wrote to memory of 4316 2732 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4316 wrote to memory of 4180 4316 PURCHASE ORDER.pdf.exe PURCHASE ORDER.pdf.exe PID 4180 wrote to memory of 2236 4180 PURCHASE ORDER.pdf.exe cmd.exe PID 4180 wrote to memory of 2236 4180 PURCHASE ORDER.pdf.exe cmd.exe PID 4180 wrote to memory of 2236 4180 PURCHASE ORDER.pdf.exe cmd.exe PID 2236 wrote to memory of 3172 2236 cmd.exe taskkill.exe PID 2236 wrote to memory of 3172 2236 cmd.exe taskkill.exe PID 2236 wrote to memory of 3172 2236 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⤵
- Checks computer location settings
- 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 4180 & erase C:\Users\Admin\AppData\Local\Temp\PURCHASE ORDER.pdf.exe & RD /S /Q C:\\ProgramData\\131513585834127\\* & exit4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 41805⤵
- 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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C:\ProgramData\mozglue.dllFilesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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C:\ProgramData\nss3.dllFilesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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C:\ProgramData\sqlite3.dllFilesize
630KB
MD5e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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memory/2236-146-0x0000000000000000-mapping.dmp
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memory/3172-148-0x0000000000000000-mapping.dmp
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memory/4180-141-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4180-140-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4180-138-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4180-137-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4180-136-0x0000000000000000-mapping.dmp
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memory/4180-145-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4180-147-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/4316-139-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4316-132-0x0000000000000000-mapping.dmp
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memory/4316-135-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB
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memory/4316-133-0x0000000000400000-0x000000000043A000-memory.dmpFilesize
232KB