Analysis
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max time kernel
79s -
max time network
133s -
platform
windows7_x64 -
resource
win7v20210408 -
submitted
15-04-2021 08:07
Static task
static1
Behavioral task
behavioral1
Sample
ser33vs.exe
Resource
win7v20210408
General
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Target
ser33vs.exe
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Size
1.5MB
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MD5
a812b477526d412e6d89d9733b935406
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SHA1
dada6f2fde5f1679665625dfba529f0c13c1d1d5
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SHA256
9ff7923de3f164579964eab7e8f6e23a8ed18c488a862a504a23ef14281198de
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SHA512
2cd838e2d5a2c7ca6f4bfe6f2035084276677f526cab0194dd3b45007d8d0453528f8ded130dbd3484b751f76221f54c2c8866c137ddd44ae2096e3abefe0cff
Malware Config
Signatures
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Deletes itself 1 IoCs
Processes:
cmd.exepid process 436 cmd.exe -
Loads dropped DLL 4 IoCs
Processes:
ser33vs.exepid process 1540 ser33vs.exe 1540 ser33vs.exe 1540 ser33vs.exe 1540 ser33vs.exe -
Reads local data of messenger clients 2 TTPs
Infostealers often target stored data of messaging applications, which can include saved credentials and account information.
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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:
ser33vs.exedescription pid process target process PID 1640 set thread context of 1540 1640 ser33vs.exe ser33vs.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 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
ser33vs.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 ser33vs.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString ser33vs.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 1944 timeout.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1452 taskkill.exe -
Processes:
ser33vs.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436 ser33vs.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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 ser33vs.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
ser33vs.exepid process 1540 ser33vs.exe 1540 ser33vs.exe 1540 ser33vs.exe 1540 ser33vs.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
taskkill.exedescription pid process Token: SeDebugPrivilege 1452 taskkill.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
ser33vs.exeser33vs.execmd.exedescription pid process target process PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1640 wrote to memory of 1540 1640 ser33vs.exe ser33vs.exe PID 1540 wrote to memory of 436 1540 ser33vs.exe cmd.exe PID 1540 wrote to memory of 436 1540 ser33vs.exe cmd.exe PID 1540 wrote to memory of 436 1540 ser33vs.exe cmd.exe PID 1540 wrote to memory of 436 1540 ser33vs.exe cmd.exe PID 436 wrote to memory of 1452 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1452 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1452 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1452 436 cmd.exe taskkill.exe PID 436 wrote to memory of 1944 436 cmd.exe timeout.exe PID 436 wrote to memory of 1944 436 cmd.exe timeout.exe PID 436 wrote to memory of 1944 436 cmd.exe timeout.exe PID 436 wrote to memory of 1944 436 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\ser33vs.exe"C:\Users\Admin\AppData\Local\Temp\ser33vs.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ser33vs.exe"{path}"2⤵
- Loads dropped DLL
- Checks processor information in registry
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im ser33vs.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\ser33vs.exe" & del C:\ProgramData\*.dll & exit3⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /im ser33vs.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
Loading Replay Monitor...
Downloads
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C:\ProgramData\freebl3.dllMD5
ef2834ac4ee7d6724f255beaf527e635
SHA15be8c1e73a21b49f353c2ecfa4108e43a883cb7b
SHA256a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba
SHA512c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2
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C:\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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C:\ProgramData\msvcp140.dllMD5
109f0f02fd37c84bfc7508d4227d7ed5
SHA1ef7420141bb15ac334d3964082361a460bfdb975
SHA256334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4
SHA51246eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39
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C:\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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C:\ProgramData\softokn3.dllMD5
a2ee53de9167bf0d6c019303b7ca84e5
SHA12a3c737fa1157e8483815e98b666408a18c0db42
SHA25643536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083
SHA51245b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8
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C:\ProgramData\vcruntime140.dllMD5
7587bf9cb4147022cd5681b015183046
SHA1f2106306a8f6f0da5afb7fc765cfa0757ad5a628
SHA256c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d
SHA5120b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f
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\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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\ProgramData\msvcp140.dllMD5
109f0f02fd37c84bfc7508d4227d7ed5
SHA1ef7420141bb15ac334d3964082361a460bfdb975
SHA256334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4
SHA51246eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39
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\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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\ProgramData\vcruntime140.dllMD5
7587bf9cb4147022cd5681b015183046
SHA1f2106306a8f6f0da5afb7fc765cfa0757ad5a628
SHA256c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d
SHA5120b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f
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memory/436-74-0x0000000000000000-mapping.dmp
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memory/1452-75-0x0000000000000000-mapping.dmp
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memory/1540-69-0x0000000000400000-0x0000000000498000-memory.dmpFilesize
608KB
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memory/1540-68-0x00000000769B1000-0x00000000769B3000-memory.dmpFilesize
8KB
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memory/1540-67-0x000000000046662D-mapping.dmp
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memory/1540-66-0x0000000000400000-0x0000000000498000-memory.dmpFilesize
608KB
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memory/1640-59-0x0000000000C50000-0x0000000000C51000-memory.dmpFilesize
4KB
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memory/1640-65-0x0000000000600000-0x0000000000695000-memory.dmpFilesize
596KB
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memory/1640-64-0x0000000009510000-0x00000000095E8000-memory.dmpFilesize
864KB
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memory/1640-63-0x0000000000210000-0x0000000000215000-memory.dmpFilesize
20KB
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memory/1640-62-0x0000000005030000-0x00000000050FF000-memory.dmpFilesize
828KB
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memory/1640-61-0x0000000004A00000-0x0000000004A01000-memory.dmpFilesize
4KB
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memory/1944-76-0x0000000000000000-mapping.dmp