Analysis
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max time kernel
121s -
max time network
124s -
platform
windows10_x64 -
resource
win10-en-20210920 -
submitted
26-10-2021 05:42
Static task
static1
General
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Target
22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exe
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Size
567KB
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MD5
41ed34b70460e1eb3b561fbc89b65052
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SHA1
a5def1d5bf16265f8a828dd4b1e9c2deede4e3c1
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SHA256
22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b
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SHA512
03cc6e74afc17bfbc54d9284d84c3b0d33f1d615cd7214aa6fabddb42579e30d9117aeaa88c3e8fdb56a9d6438eb1fdd7c00af9c0ebb730619ee19b6f34dbf60
Malware Config
Extracted
vidar
41.5
921
https://mas.to/@xeroxxx
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profile_id
921
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 2 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\Temp\build.exe family_vidar C:\Users\Admin\AppData\Local\Temp\build.exe family_vidar -
Downloads MZ/PE file
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Executes dropped EXE 1 IoCs
Processes:
build.exepid process 648 build.exe -
Loads dropped DLL 2 IoCs
Processes:
build.exepid process 648 build.exe 648 build.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:
build.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 2688 timeout.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 3976 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
build.exepid process 648 build.exe 648 build.exe 648 build.exe 648 build.exe 648 build.exe 648 build.exe 648 build.exe 648 build.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 3976 taskkill.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exebuild.execmd.exedescription pid process target process PID 1664 wrote to memory of 648 1664 22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exe build.exe PID 1664 wrote to memory of 648 1664 22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exe build.exe PID 1664 wrote to memory of 648 1664 22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exe build.exe PID 648 wrote to memory of 916 648 build.exe cmd.exe PID 648 wrote to memory of 916 648 build.exe cmd.exe PID 648 wrote to memory of 916 648 build.exe cmd.exe PID 916 wrote to memory of 3976 916 cmd.exe taskkill.exe PID 916 wrote to memory of 3976 916 cmd.exe taskkill.exe PID 916 wrote to memory of 3976 916 cmd.exe taskkill.exe PID 916 wrote to memory of 2688 916 cmd.exe timeout.exe PID 916 wrote to memory of 2688 916 cmd.exe timeout.exe PID 916 wrote to memory of 2688 916 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exe"C:\Users\Admin\AppData\Local\Temp\22d5d59d54369797b47fb086e329d72d65f98bd679977370ddb24118815f311b.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\build.exe"C:\Users\Admin\AppData\Local\Temp\build.exe"2⤵
- Executes dropped EXE
- 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 build.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\build.exe" & del C:\ProgramData\*.dll & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im build.exe /f4⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\timeout.exetimeout /t 64⤵
- Delays execution with timeout.exe
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\build.exeMD5
eafba1017e94765780d8a5b182d4c325
SHA17968d32aa44d2c66dc670841d86ef8dba376128f
SHA2560d50080d7267c71894ccfd698c1ef6369cf2b1b182f903c6b8cbab8e1fb524e3
SHA51231ff0f70cafc20e71cbe4e574b4c1460dbb77e85815339bbe191b41c771da1faa201f5fc95ab10a9b8e707df590431060e7c9d7cb8c15bd275523e1d78be2aaa
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C:\Users\Admin\AppData\Local\Temp\build.exeMD5
eafba1017e94765780d8a5b182d4c325
SHA17968d32aa44d2c66dc670841d86ef8dba376128f
SHA2560d50080d7267c71894ccfd698c1ef6369cf2b1b182f903c6b8cbab8e1fb524e3
SHA51231ff0f70cafc20e71cbe4e574b4c1460dbb77e85815339bbe191b41c771da1faa201f5fc95ab10a9b8e707df590431060e7c9d7cb8c15bd275523e1d78be2aaa
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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/648-119-0x0000000000000000-mapping.dmp
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memory/916-125-0x0000000000000000-mapping.dmp
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memory/1664-115-0x0000000000C40000-0x0000000000C41000-memory.dmpFilesize
4KB
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memory/1664-117-0x000000001C640000-0x000000001C77D000-memory.dmpFilesize
1.2MB
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memory/1664-118-0x000000001C7F0000-0x000000001C868000-memory.dmpFilesize
480KB
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memory/1664-122-0x000000001C9E0000-0x000000001C9E2000-memory.dmpFilesize
8KB
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memory/2688-127-0x0000000000000000-mapping.dmp
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memory/3976-126-0x0000000000000000-mapping.dmp