Analysis Overview
SHA256
bcd164a7b96b84faa2f2ba69f84ef7db8dd160904ab1e36b5c2ec6a4fbae9282
Threat Level: Known bad
The file service.bin.zip was found to be: Known bad.
Malicious Activity Summary
Oski
Downloads MZ/PE file
Reads user/profile data of web browsers
Deletes itself
Loads dropped DLL
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Suspicious use of SetThreadContext
Program crash
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Kills process with taskkill
Checks processor information in registry
Suspicious behavior: MapViewOfSection
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2021-08-02 19:58
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2021-08-02 19:58
Reported
2021-08-02 20:03
Platform
win7v20210408
Max time kernel
8s
Max time network
49s
Command Line
Signatures
Oski
Downloads MZ/PE file
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
Reads user/profile data of web browsers
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 676 set thread context of 1780 | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
Enumerates physical storage devices
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\service.bin.exe
"C:\Users\Admin\AppData\Local\Temp\service.bin.exe"
C:\Users\Admin\AppData\Local\Temp\service.bin.exe
"C:\Users\Admin\AppData\Local\Temp\service.bin.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 1780 & erase C:\Users\Admin\AppData\Local\Temp\service.bin.exe & RD /S /Q C:\\ProgramData\\889775212846765\\* & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 1780
Network
| Country | Destination | Domain | Proto |
| N/A | 8.8.8.8:53 | chikkark.xyz | udp |
| N/A | 172.67.177.59:80 | chikkark.xyz | tcp |
Files
memory/1780-59-0x000000000040717B-mapping.dmp
memory/1780-60-0x0000000075051000-0x0000000075053000-memory.dmp
memory/676-61-0x0000000000130000-0x0000000000132000-memory.dmp
memory/1780-62-0x0000000000400000-0x0000000000438000-memory.dmp
\ProgramData\sqlite3.dll
| MD5 | e477a96c8f2b18d6b5c27bde49c990bf |
| SHA1 | e980c9bf41330d1e5bd04556db4646a0210f7409 |
| SHA256 | 16574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660 |
| SHA512 | 335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c |
\ProgramData\nss3.dll
| MD5 | bfac4e3c5908856ba17d41edcd455a51 |
| SHA1 | 8eec7e888767aa9e4cca8ff246eb2aacb9170428 |
| SHA256 | e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78 |
| SHA512 | 2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66 |
\ProgramData\mozglue.dll
| MD5 | 8f73c08a9660691143661bf7332c3c27 |
| SHA1 | 37fa65dd737c50fda710fdbde89e51374d0c204a |
| SHA256 | 3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd |
| SHA512 | 0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89 |
\ProgramData\msvcp140.dll
| MD5 | 109f0f02fd37c84bfc7508d4227d7ed5 |
| SHA1 | ef7420141bb15ac334d3964082361a460bfdb975 |
| SHA256 | 334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4 |
| SHA512 | 46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39 |
\ProgramData\vcruntime140.dll
| MD5 | 7587bf9cb4147022cd5681b015183046 |
| SHA1 | f2106306a8f6f0da5afb7fc765cfa0757ad5a628 |
| SHA256 | c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d |
| SHA512 | 0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f |
memory/1624-68-0x0000000000000000-mapping.dmp
memory/1632-69-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2021-08-02 19:58
Reported
2021-08-02 20:02
Platform
win10v20210410
Max time kernel
13s
Max time network
115s
Command Line
Signatures
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3944 set thread context of 612 | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Suspicious behavior: MapViewOfSection
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeRestorePrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WerFault.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3944 wrote to memory of 612 | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
| PID 3944 wrote to memory of 612 | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
| PID 3944 wrote to memory of 612 | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
| PID 3944 wrote to memory of 612 | N/A | C:\Users\Admin\AppData\Local\Temp\service.bin.exe | C:\Users\Admin\AppData\Local\Temp\service.bin.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\service.bin.exe
"C:\Users\Admin\AppData\Local\Temp\service.bin.exe"
C:\Users\Admin\AppData\Local\Temp\service.bin.exe
"C:\Users\Admin\AppData\Local\Temp\service.bin.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 612 -s 284
Network
Files
memory/612-114-0x000000000050717B-mapping.dmp
memory/3944-115-0x0000000000FA0000-0x0000000000FA2000-memory.dmp