Analysis
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max time kernel
124s -
max time network
135s -
platform
windows10_x64 -
resource
win10-en-20210920 -
submitted
14-10-2021 14:20
Static task
static1
General
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Target
bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe
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Size
715KB
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MD5
711b94767734527a2b96c451367003a2
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SHA1
d096978d290d04e73fe15d41216b66df5628ce09
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SHA256
bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3
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SHA512
ce717cb957336f993fc74cd27005715d89820a24b9792aed5a6fc416ed4617446becef2ca8583315410306e5954c0e54246f7068e1f395fa882a7000e9251037
Malware Config
Extracted
vidar
41.3
1008
https://mas.to/@oleg98
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profile_id
1008
Signatures
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suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
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suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
suricata: ET MALWARE Vidar/Arkei Stealer Client Data Upload
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suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
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Vidar Stealer 1 IoCs
Processes:
resource yara_rule behavioral1/memory/2428-117-0x0000000000400000-0x0000000000524000-memory.dmp family_vidar -
Downloads MZ/PE file
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Loads dropped DLL 2 IoCs
Processes:
bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exepid process 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.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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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 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1488 timeout.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 3008 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exepid process 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 3008 taskkill.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.execmd.exedescription pid process target process PID 2428 wrote to memory of 3452 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe cmd.exe PID 2428 wrote to memory of 3452 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe cmd.exe PID 2428 wrote to memory of 3452 2428 bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe cmd.exe PID 3452 wrote to memory of 3008 3452 cmd.exe taskkill.exe PID 3452 wrote to memory of 3008 3452 cmd.exe taskkill.exe PID 3452 wrote to memory of 3008 3452 cmd.exe taskkill.exe PID 3452 wrote to memory of 1488 3452 cmd.exe timeout.exe PID 3452 wrote to memory of 1488 3452 cmd.exe timeout.exe PID 3452 wrote to memory of 1488 3452 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe"C:\Users\Admin\AppData\Local\Temp\bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe"1⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe" & del C:\ProgramData\*.dll & exit2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im bb3f5d12e82d2ef8a2294270da5606572f37c1ea5f02e0be95f57a31909414e3.exe /f3⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\timeout.exetimeout /t 63⤵
- Delays execution with timeout.exe
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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memory/1488-122-0x0000000000000000-mapping.dmp
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memory/2428-115-0x0000000000891000-0x000000000090E000-memory.dmpFilesize
500KB
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memory/2428-116-0x0000000000530000-0x000000000067A000-memory.dmpFilesize
1.3MB
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memory/2428-117-0x0000000000400000-0x0000000000524000-memory.dmpFilesize
1.1MB
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memory/3008-121-0x0000000000000000-mapping.dmp
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memory/3452-120-0x0000000000000000-mapping.dmp