Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10_x64 -
resource
win10v20210408 -
submitted
19-04-2021 19:55
Static task
static1
Behavioral task
behavioral1
Sample
Shipment Document BL,INV And Packing List Attached.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
Shipment Document BL,INV And Packing List Attached.exe
Resource
win10v20210408
General
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Target
Shipment Document BL,INV And Packing List Attached.exe
Malware Config
Extracted
oski
31.210.20.228
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 4 IoCs
Processes:
Shipment Document BL,INV And Packing List Attached.exeShipment Document BL,INV And Packing List Attached.exepid process 1000 Shipment Document BL,INV And Packing List Attached.exe 856 Shipment Document BL,INV And Packing List Attached.exe 856 Shipment Document BL,INV And Packing List Attached.exe 856 Shipment Document BL,INV And Packing List Attached.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:
Shipment Document BL,INV And Packing List Attached.exedescription pid process target process PID 1000 set thread context of 856 1000 Shipment Document BL,INV And Packing List Attached.exe Shipment Document BL,INV And Packing List Attached.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:
Shipment Document BL,INV And Packing List Attached.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString Shipment Document BL,INV And Packing List Attached.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1640 taskkill.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
Shipment Document BL,INV And Packing List Attached.exepid process 1000 Shipment Document BL,INV And Packing List Attached.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 1640 taskkill.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
Shipment Document BL,INV And Packing List Attached.exeShipment Document BL,INV And Packing List Attached.execmd.exedescription pid process target process PID 1000 wrote to memory of 856 1000 Shipment Document BL,INV And Packing List Attached.exe Shipment Document BL,INV And Packing List Attached.exe PID 1000 wrote to memory of 856 1000 Shipment Document BL,INV And Packing List Attached.exe Shipment Document BL,INV And Packing List Attached.exe PID 1000 wrote to memory of 856 1000 Shipment Document BL,INV And Packing List Attached.exe Shipment Document BL,INV And Packing List Attached.exe PID 1000 wrote to memory of 856 1000 Shipment Document BL,INV And Packing List Attached.exe Shipment Document BL,INV And Packing List Attached.exe PID 856 wrote to memory of 1096 856 Shipment Document BL,INV And Packing List Attached.exe cmd.exe PID 856 wrote to memory of 1096 856 Shipment Document BL,INV And Packing List Attached.exe cmd.exe PID 856 wrote to memory of 1096 856 Shipment Document BL,INV And Packing List Attached.exe cmd.exe PID 1096 wrote to memory of 1640 1096 cmd.exe taskkill.exe PID 1096 wrote to memory of 1640 1096 cmd.exe taskkill.exe PID 1096 wrote to memory of 1640 1096 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV And Packing List Attached.exe"C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV And Packing List Attached.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV And Packing List Attached.exe"C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV And Packing List Attached.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 856 & erase C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV And Packing List Atta' & RD /S /Q C:\\ProgramData\\334660920130261\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 8564⤵
- 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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\Users\Admin\AppData\Local\Temp\nsm578E.tmp\ye59m9ri8.dllMD5
d50900281f111920d7f29261a6147120
SHA1de2d026a2cbc09be2b1a76136c56cf0591f5455c
SHA256bdf8682656f026c7622a0cf0e90e711bffcd6fd6c6343f0d1c81d10b896b386d
SHA512918feb60368412f92f00588c0224b49dea6b96ad4debcac6b9d7b814da290ebe36e1d31cd5faf43fe494b7f6d428dc0f46c7c3e59e6c6106d5398ce6779a5f44
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memory/856-115-0x000000000040717B-mapping.dmp
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memory/856-118-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/1000-116-0x0000000003190000-0x0000000003191000-memory.dmpFilesize
4KB
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memory/1000-117-0x0000000003191000-0x0000000003193000-memory.dmpFilesize
8KB
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memory/1096-122-0x0000000000000000-mapping.dmp
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memory/1640-123-0x0000000000000000-mapping.dmp