Analysis Overview
SHA256
aec9eb81f2a2837488165119d41da8eec94607b9bde0b729f811ced008ad95cb
Threat Level: Known bad
The file Inquirypdf.exe was found to be: Known bad.
Malicious Activity Summary
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (passwords.txt) M2
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Oski
Downloads MZ/PE file
Reads user/profile data of web browsers
Deletes itself
Checks computer location settings
Loads dropped DLL
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Suspicious use of SetThreadContext
Enumerates physical storage devices
Program crash
Kills process with taskkill
Creates scheduled task(s)
Checks processor information in registry
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-04-13 17:33
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-04-13 17:33
Reported
2022-04-13 17:36
Platform
win7-20220310-en
Max time kernel
4294178s
Max time network
120s
Command Line
Signatures
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (passwords.txt) M2
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
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\Inquirypdf.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.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 1428 set thread context of 1852 | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.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\Inquirypdf.exe | N/A |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Kills process with taskkill
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\taskkill.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe"
C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vCTupI" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCC73.tmp"
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"{path}"
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"{path}"
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"{path}"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c taskkill /pid 1852 & erase C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe & RD /S /Q C:\\ProgramData\\245778750845286\\* & exit
C:\Windows\SysWOW64\taskkill.exe
taskkill /pid 1852
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | ndy.derg.tech | udp |
| US | 192.185.16.190:80 | ndy.derg.tech | tcp |
Files
memory/1428-54-0x00000000001B0000-0x0000000000226000-memory.dmp
memory/1428-55-0x0000000000390000-0x000000000039A000-memory.dmp
memory/1428-56-0x0000000005460000-0x00000000054DC000-memory.dmp
memory/1428-57-0x00000000004F0000-0x0000000000528000-memory.dmp
memory/1028-58-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\tmpCC73.tmp
| MD5 | d6dd49c4c5303793b84f18e2bc94cbb1 |
| SHA1 | 6ac8379d44d48a4485404d654a5fb095ea550c5a |
| SHA256 | 2d8f6e48a6603518024d0cb787060aaaafbc4ae95587733432f23c6726974d4c |
| SHA512 | 3e73a25abda5c8a7502dbdcc871aed1ac1c893e56cd2521b538030066cfebb2a56c0389d34705b568ee15aac182e1eecf60af6a9530d599afc731af140c00c06 |
memory/1852-60-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-61-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-63-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-65-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-67-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-69-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-70-0x000000000040717B-mapping.dmp
memory/1852-72-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1852-73-0x0000000074DE1000-0x0000000074DE3000-memory.dmp
memory/1852-74-0x0000000000400000-0x0000000000438000-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 |
memory/1304-78-0x0000000000000000-mapping.dmp
memory/800-79-0x0000000000000000-mapping.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-04-13 17:33
Reported
2022-04-13 17:36
Platform
win10v2004-20220331-en
Max time kernel
135s
Max time network
150s
Command Line
Signatures
Oski
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-157025953-3125636059-437143553-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3488 set thread context of 4384 | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe"
C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vCTupI" /XML "C:\Users\Admin\AppData\Local\Temp\tmpBF3E.tmp"
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"{path}"
C:\Users\Admin\AppData\Local\Temp\Inquirypdf.exe
"{path}"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4384 -ip 4384
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4384 -s 236
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | crl4.digicert.com | udp |
| US | 93.184.220.29:80 | crl4.digicert.com | tcp |
| US | 93.184.220.29:80 | crl4.digicert.com | tcp |
| US | 52.168.112.66:443 | tcp | |
| US | 93.184.220.29:80 | crl4.digicert.com | tcp |
| FI | 62.115.252.112:80 | tcp |
Files
memory/3488-124-0x0000000000580000-0x00000000005F6000-memory.dmp
memory/3488-125-0x0000000005490000-0x0000000005A34000-memory.dmp
memory/3488-126-0x0000000004FC0000-0x0000000005052000-memory.dmp
memory/3488-127-0x0000000005060000-0x00000000050FC000-memory.dmp
memory/3488-128-0x0000000004FA0000-0x0000000004FAA000-memory.dmp
memory/808-129-0x0000000000000000-mapping.dmp
C:\Users\Admin\AppData\Local\Temp\tmpBF3E.tmp
| MD5 | 44998581395b24278c90a076bb6d9db8 |
| SHA1 | 279bba33541d890d103e775aa7e3628c7cf5dee3 |
| SHA256 | facf69c4cb336856f289d9d0cd7dcd5e152f1908c837bdf4c12e697cc3f3072c |
| SHA512 | c52a676f3a55f8f505826a16f5a49136bb4dbaceaf2d43b27d9ae6e5a9d16c8fba68c39099743f08bb05d02cc3bebde303eccced0c7611224d74a7f95677f865 |
memory/4252-131-0x0000000000000000-mapping.dmp
memory/4384-132-0x0000000000000000-mapping.dmp
memory/4384-133-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4384-134-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4384-135-0x0000000000400000-0x0000000000438000-memory.dmp