Analysis
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max time kernel
10s -
max time network
110s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
20-04-2021 06:12
Static task
static1
Behavioral task
behavioral1
Sample
DHL Shipments Docs Arrival.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
DHL Shipments Docs Arrival.exe
Resource
win10v20210410
General
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Target
DHL Shipments Docs Arrival.exe
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Size
419KB
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MD5
64e7c59ace47ccf1a97eedaf751e343c
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SHA1
56f17882965d10fdc10643b38f224799ce26ce26
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SHA256
e8c024453b4ea2c8deae99a076086cc051cb6d52453e8ba9a6316d4e7cb6a783
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SHA512
865eac96134348888b76db6d94b19d88009854055ace13a3f2147e27dc5d6a2f8a72a7b0cb92c23090ff0801955f4eed55390cfbd5a66816a0b839f3e0e41e18
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:
DHL Shipments Docs Arrival.exeDHL Shipments Docs Arrival.exepid process 3892 DHL Shipments Docs Arrival.exe 3540 DHL Shipments Docs Arrival.exe 3540 DHL Shipments Docs Arrival.exe 3540 DHL Shipments Docs Arrival.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:
DHL Shipments Docs Arrival.exedescription pid process target process PID 3892 set thread context of 3540 3892 DHL Shipments Docs Arrival.exe DHL Shipments Docs Arrival.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:
DHL Shipments Docs Arrival.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString DHL Shipments Docs Arrival.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 4084 taskkill.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
DHL Shipments Docs Arrival.exepid process 3892 DHL Shipments Docs Arrival.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 4084 taskkill.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
DHL Shipments Docs Arrival.exeDHL Shipments Docs Arrival.execmd.exedescription pid process target process PID 3892 wrote to memory of 3540 3892 DHL Shipments Docs Arrival.exe DHL Shipments Docs Arrival.exe PID 3892 wrote to memory of 3540 3892 DHL Shipments Docs Arrival.exe DHL Shipments Docs Arrival.exe PID 3892 wrote to memory of 3540 3892 DHL Shipments Docs Arrival.exe DHL Shipments Docs Arrival.exe PID 3892 wrote to memory of 3540 3892 DHL Shipments Docs Arrival.exe DHL Shipments Docs Arrival.exe PID 3540 wrote to memory of 2680 3540 DHL Shipments Docs Arrival.exe cmd.exe PID 3540 wrote to memory of 2680 3540 DHL Shipments Docs Arrival.exe cmd.exe PID 3540 wrote to memory of 2680 3540 DHL Shipments Docs Arrival.exe cmd.exe PID 2680 wrote to memory of 4084 2680 cmd.exe taskkill.exe PID 2680 wrote to memory of 4084 2680 cmd.exe taskkill.exe PID 2680 wrote to memory of 4084 2680 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\DHL Shipments Docs Arrival.exe"C:\Users\Admin\AppData\Local\Temp\DHL Shipments Docs Arrival.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\DHL Shipments Docs Arrival.exe"C:\Users\Admin\AppData\Local\Temp\DHL Shipments Docs Arrival.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 3540 & erase C:\Users\Admin\AppData\Local\Temp\DHL Shipments Docs Arrival.exe & RD /S /Q C:\\ProgramData\\483167855573670\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 35404⤵
- 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\nso29F6.tmp\5u3m5tmpoljikjh.dllMD5
f544319fb7e2cf7bd2395920fef3b56a
SHA15a9967ba6a2e9077071784d1a73c1c000beacee5
SHA256597357f1f0cb1939db02ebe4987044e67f7ac26f15a257243499f6d2823485a9
SHA51266a46ef526e6d82c5fd9716b21bc2aba13073c2abdf9fca5cba8eba974d325e5407e5c2111c956ca51d13217f562eac93aac16d5cb262539c729bad2c0208cfd
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memory/2680-122-0x0000000000000000-mapping.dmp
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memory/3540-115-0x000000000040717B-mapping.dmp
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memory/3540-118-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3892-117-0x0000000002D61000-0x0000000002D63000-memory.dmpFilesize
8KB
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memory/3892-116-0x0000000002D60000-0x0000000002D61000-memory.dmpFilesize
4KB
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memory/4084-123-0x0000000000000000-mapping.dmp