Analysis
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max time kernel
149s -
max time network
153s -
platform
windows10_x64 -
resource
win10v20210410 -
submitted
11-05-2021 11:21
Static task
static1
Behavioral task
behavioral1
Sample
booking.exe
Resource
win7v20210408
Behavioral task
behavioral2
Sample
booking.exe
Resource
win10v20210410
General
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Target
booking.exe
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Size
258KB
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MD5
3ea68451bc134bea97313a13587b7841
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SHA1
f75536e5d9e174aa2d2e75521c134c03a720b93b
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SHA256
b5b4f2430ee5b5348b55a2d1be3e1bf5f88094e67409bbb88d6e677da91c8482
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SHA512
e0f3afd0a7daffdb23650ce2731a107db0b6d303fd2cce82d9ecfee0a9cf41f3c000d215cc6160b1fcaeb1c722c207c92ec2190e13a6f34b9c8226852295ac80
Malware Config
Extracted
oski
45.144.225.52
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:
booking.exebooking.exepid process 508 booking.exe 1124 booking.exe 1124 booking.exe 1124 booking.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:
booking.exedescription pid process target process PID 508 set thread context of 1124 508 booking.exe booking.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:
booking.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString booking.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 3456 taskkill.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
booking.exepid process 508 booking.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 3456 taskkill.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
booking.exebooking.execmd.exedescription pid process target process PID 508 wrote to memory of 1124 508 booking.exe booking.exe PID 508 wrote to memory of 1124 508 booking.exe booking.exe PID 508 wrote to memory of 1124 508 booking.exe booking.exe PID 508 wrote to memory of 1124 508 booking.exe booking.exe PID 1124 wrote to memory of 3988 1124 booking.exe cmd.exe PID 1124 wrote to memory of 3988 1124 booking.exe cmd.exe PID 1124 wrote to memory of 3988 1124 booking.exe cmd.exe PID 3988 wrote to memory of 3456 3988 cmd.exe taskkill.exe PID 3988 wrote to memory of 3456 3988 cmd.exe taskkill.exe PID 3988 wrote to memory of 3456 3988 cmd.exe taskkill.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\booking.exe"C:\Users\Admin\AppData\Local\Temp\booking.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\booking.exe"C:\Users\Admin\AppData\Local\Temp\booking.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 1124 & erase C:\Users\Admin\AppData\Local\Temp\booking.exe & RD /S /Q C:\\ProgramData\\254292099237416\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 11244⤵
- 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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\Users\Admin\AppData\Local\Temp\nsyF71D.tmp\0jax6172i46.dllMD5
e928b08779af32df8ff1a4014b926715
SHA13c20ba4a9b188cb64f66c64d9e904e9e7445bdd1
SHA256cd8f6e2853980b7be933115ca485deb71f86b458de01956f36a1c75dc0520617
SHA51291c5a740dba49ff764b50d7b819683de180a7e096a8d9780ce750ff49b15f6b2427513887d63d3783c6fe57388abc7a41b5a7631f325ba0203d5ed1280d89161
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memory/508-116-0x00000000028C0000-0x00000000028C2000-memory.dmpFilesize
8KB
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memory/1124-115-0x000000000040717B-mapping.dmp
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memory/1124-117-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/3456-122-0x0000000000000000-mapping.dmp
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memory/3988-121-0x0000000000000000-mapping.dmp