Analysis Overview
SHA256
c0765fd53d64c425a848b89fa1168552fd2cae90984cfa14c0b7d4e0789fece7
Threat Level: Known bad
The file 8e771b25550073599c67601bad91b7b4 was found to be: Known bad.
Malicious Activity Summary
Oski
CustAttr .NET packer
Reads user/profile data of web browsers
Checks computer location settings
Suspicious use of SetThreadContext
Enumerates physical storage devices
Program crash
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Creates scheduled task(s)
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-02-04 06:34
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-02-04 06:34
Reported
2024-02-04 06:37
Platform
win7-20231215-en
Max time kernel
122s
Max time network
122s
Command Line
Signatures
Oski
CustAttr .NET packer
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Reads user/profile data of web browsers
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2516 set thread context of 2396 | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.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\8e771b25550073599c67601bad91b7b4.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\8e771b25550073599c67601bad91b7b4.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe
"C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\CsFvluJ.exe"
C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CsFvluJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD356.tmp"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\CsFvluJ.exe"
C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe
"C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2396 -s 784
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | fine.le-pearl.com | udp |
| US | 108.167.158.96:80 | fine.le-pearl.com | tcp |
Files
memory/2516-0-0x0000000000F80000-0x0000000001082000-memory.dmp
memory/2516-1-0x0000000074A40000-0x000000007512E000-memory.dmp
memory/2516-2-0x0000000004830000-0x0000000004870000-memory.dmp
memory/2516-3-0x0000000000310000-0x0000000000322000-memory.dmp
memory/2516-4-0x0000000074A40000-0x000000007512E000-memory.dmp
memory/2516-5-0x0000000004830000-0x0000000004870000-memory.dmp
memory/2516-6-0x00000000057E0000-0x000000000587E000-memory.dmp
memory/2516-7-0x0000000004870000-0x00000000048A8000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmpD356.tmp
| MD5 | 230f1197385527bc022482a86ab5ae70 |
| SHA1 | 728a8183fada7ac23a46f78eaac7f8a72c2ba23e |
| SHA256 | d5a695ab808ad032ac5664252eead4cf3c49922c6cf8ec739c0a97834cbad77c |
| SHA512 | 71e14d8ac5777078952413e61776544195ecd1f69aa088e669758b2681225b0b52dceaf2bb2f8a232a5cb972cf8f8e6eaf4367450dd065468825a0bafde73e16 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\2SVK0H6WGGOLC72AS40Z.temp
| MD5 | 2a5eac5eaa0b710598342d4a3414c603 |
| SHA1 | 26ca87facb91376ccccf25824938a11e7e93b03d |
| SHA256 | 4aa53a1eeb78044ecb8c9616e7418be8baf896dbc91f9b958c420ca1397c418d |
| SHA512 | d99329cabd43b7ea18308e42dcc9423deec87ec2cd0a7949c9a72c52fba5500d0ce4e483c348bc53587bae70519f04444f9a293dea1d9bcc823a7d80fa6b96bd |
memory/2396-20-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2396-21-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2396-22-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2396-23-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2396-24-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2396-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/2396-27-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2396-29-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3068-35-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/2608-36-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/2608-37-0x0000000002890000-0x00000000028D0000-memory.dmp
memory/3068-38-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/2608-39-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/2396-40-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3056-41-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/3056-42-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/3056-43-0x0000000002750000-0x0000000002790000-memory.dmp
memory/3056-44-0x0000000002750000-0x0000000002790000-memory.dmp
memory/3068-45-0x00000000029C0000-0x0000000002A00000-memory.dmp
memory/3068-47-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/3056-46-0x000000006ED20000-0x000000006F2CB000-memory.dmp
memory/2608-48-0x000000006ED20000-0x000000006F2CB000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\LFTKP12M\suspendedpage[1].htm
| MD5 | 1842eed13fddc700a50adada08a0f84d |
| SHA1 | 5e7b6997ffaf89afdb803de2e9231cd8886621ae |
| SHA256 | 47ac9eef48022403111f9cef6871af594079acdd88da83e7d2b2a92fa47f7368 |
| SHA512 | 0d0086367e60782f81324abc5a79ae4c19aaa96aeb7aead23d4ca2dde0af5cc7cf3cc9b6e391b95405ed97a136fcd99af3f868a6027b89b5fcc47cff52272b1d |
memory/2516-65-0x0000000074A40000-0x000000007512E000-memory.dmp
memory/2396-66-0x0000000000400000-0x0000000000438000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-02-04 06:34
Reported
2024-02-04 06:37
Platform
win10v2004-20231222-en
Max time kernel
87s
Max time network
150s
Command Line
Signatures
Oski
CustAttr .NET packer
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | N/A |
Reads user/profile data of web browsers
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3020 set thread context of 4668 | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.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\8e771b25550073599c67601bad91b7b4.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:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe
"C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\CsFvluJ.exe"
C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CsFvluJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF54D.tmp"
C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe
"C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\CsFvluJ.exe"
C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe
"C:\Users\Admin\AppData\Local\Temp\8e771b25550073599c67601bad91b7b4.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4668 -ip 4668
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4668 -s 1324
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 154.239.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | fine.le-pearl.com | udp |
| US | 108.167.158.96:80 | fine.le-pearl.com | tcp |
| US | 8.8.8.8:53 | 96.158.167.108.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
Files
memory/3020-0-0x0000000000610000-0x0000000000712000-memory.dmp
memory/3020-1-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/3020-2-0x00000000055F0000-0x0000000005B94000-memory.dmp
memory/3020-3-0x0000000005120000-0x00000000051B2000-memory.dmp
memory/3020-4-0x0000000005260000-0x00000000052FC000-memory.dmp
memory/3020-5-0x0000000005110000-0x0000000005120000-memory.dmp
memory/3020-6-0x00000000051E0000-0x00000000051EA000-memory.dmp
memory/3020-7-0x0000000005580000-0x0000000005592000-memory.dmp
memory/3020-8-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/3020-9-0x0000000005110000-0x0000000005120000-memory.dmp
memory/3020-10-0x0000000006AC0000-0x0000000006B5E000-memory.dmp
memory/3020-11-0x00000000066E0000-0x0000000006718000-memory.dmp
memory/4828-16-0x0000000005080000-0x00000000050B6000-memory.dmp
memory/4828-17-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/4828-18-0x0000000005150000-0x0000000005160000-memory.dmp
memory/4828-19-0x0000000005150000-0x0000000005160000-memory.dmp
memory/4828-20-0x0000000005790000-0x0000000005DB8000-memory.dmp
memory/5048-21-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/5048-23-0x0000000004B20000-0x0000000004B30000-memory.dmp
memory/5048-24-0x0000000004B20000-0x0000000004B30000-memory.dmp
memory/4828-22-0x0000000005EA0000-0x0000000005EC2000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hbzssuqg.slu.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/4828-27-0x0000000006020000-0x0000000006086000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmpF54D.tmp
| MD5 | 6cfe7c306a618255c5da50faadb93270 |
| SHA1 | f54dfdcdad1dbc53aa557dd263ed4e90c499c814 |
| SHA256 | 7a0b02cfda8a5b89ae25762f8c5b741d9f05907210fe26d9b9db19cd9471971c |
| SHA512 | 8180cbb7bdae3fcd63fb047bc9888ab02ccee80284d9edfc14e0686d0c299a52421d9e349964ec35a76d9a320db44985835d015e9c2e58406ade9d124135a53f |
memory/4828-43-0x0000000006190000-0x00000000064E4000-memory.dmp
memory/4828-25-0x0000000005F40000-0x0000000005FA6000-memory.dmp
memory/4668-47-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4668-49-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4668-48-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4668-51-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3020-52-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/4452-54-0x0000000005080000-0x0000000005090000-memory.dmp
memory/4828-56-0x0000000006610000-0x000000000662E000-memory.dmp
memory/4452-55-0x0000000005080000-0x0000000005090000-memory.dmp
memory/4452-53-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/4828-66-0x0000000006820000-0x000000000686C000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\NSWVVUXL\suspendedpage[1].htm
| MD5 | 1842eed13fddc700a50adada08a0f84d |
| SHA1 | 5e7b6997ffaf89afdb803de2e9231cd8886621ae |
| SHA256 | 47ac9eef48022403111f9cef6871af594079acdd88da83e7d2b2a92fa47f7368 |
| SHA512 | 0d0086367e60782f81324abc5a79ae4c19aaa96aeb7aead23d4ca2dde0af5cc7cf3cc9b6e391b95405ed97a136fcd99af3f868a6027b89b5fcc47cff52272b1d |
memory/4828-75-0x0000000006BE0000-0x0000000006C12000-memory.dmp
memory/4828-76-0x000000007F8F0000-0x000000007F900000-memory.dmp
memory/4828-79-0x0000000070BB0000-0x0000000070BFC000-memory.dmp
memory/5048-78-0x0000000070BB0000-0x0000000070BFC000-memory.dmp
memory/5048-77-0x000000007FA90000-0x000000007FAA0000-memory.dmp
memory/5048-104-0x0000000004B20000-0x0000000004B30000-memory.dmp
memory/5048-103-0x0000000007240000-0x00000000072E3000-memory.dmp
memory/4828-102-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/5048-100-0x0000000004B20000-0x0000000004B30000-memory.dmp
memory/5048-91-0x0000000007210000-0x000000000722E000-memory.dmp
memory/4828-107-0x0000000007F80000-0x00000000085FA000-memory.dmp
memory/4828-110-0x0000000007940000-0x000000000795A000-memory.dmp
memory/4452-112-0x0000000070BB0000-0x0000000070BFC000-memory.dmp
memory/5048-111-0x00000000073F0000-0x00000000073FA000-memory.dmp
memory/4828-113-0x0000000005150000-0x0000000005160000-memory.dmp
memory/4452-124-0x0000000005080000-0x0000000005090000-memory.dmp
memory/4452-123-0x0000000005080000-0x0000000005090000-memory.dmp
memory/5048-125-0x0000000007600000-0x0000000007696000-memory.dmp
memory/5048-126-0x0000000007580000-0x0000000007591000-memory.dmp
memory/5048-130-0x00000000075B0000-0x00000000075BE000-memory.dmp
memory/5048-131-0x00000000075C0000-0x00000000075D4000-memory.dmp
memory/5048-132-0x00000000076C0000-0x00000000076DA000-memory.dmp
memory/5048-133-0x00000000076A0000-0x00000000076A8000-memory.dmp
memory/4668-134-0x0000000000400000-0x0000000000438000-memory.dmp
memory/4452-139-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/5048-140-0x00000000743C0000-0x0000000074B70000-memory.dmp
memory/4828-138-0x00000000743C0000-0x0000000074B70000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
| MD5 | 3d086a433708053f9bf9523e1d87a4e8 |
| SHA1 | b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28 |
| SHA256 | 6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69 |
| SHA512 | 931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd |