Analysis Overview
SHA256
42af92e5be37c1daddda7672372a39ccebb24d31d2ea65bec2a74dfbc3a4e82c
Threat Level: Known bad
The file 403990c6cbb042f7c1f5e57177272f81 was found to be: Known bad.
Malicious Activity Summary
Orcus main payload
Orcurs Rat Executable
Orcus family
Loads dropped DLL
Drops desktop.ini file(s)
Drops file in Windows directory
Unsigned PE
Suspicious use of WriteProcessMemory
Enumerates system info in registry
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-04 07:13
Signatures
Orcurs Rat Executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Orcus family
Orcus main payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-04 07:13
Reported
2024-01-04 07:15
Platform
win7-20231215-en
Max time kernel
122s
Max time network
135s
Command Line
Signatures
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2088 wrote to memory of 2924 | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe |
| PID 2088 wrote to memory of 2924 | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe |
| PID 2088 wrote to memory of 2924 | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe |
| PID 2924 wrote to memory of 2832 | N/A | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe |
| PID 2924 wrote to memory of 2832 | N/A | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe |
| PID 2924 wrote to memory of 2832 | N/A | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe
"C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe"
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe
"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\viix2i0u.cmdline"
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES693F.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC693E.tmp"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | hanakita.ddns.net | udp |
| VN | 1.54.172.244:4444 | hanakita.ddns.net | tcp |
| VN | 1.54.172.244:4444 | hanakita.ddns.net | tcp |
Files
memory/2088-0-0x0000000000590000-0x000000000059C000-memory.dmp
memory/2088-1-0x000007FEF6230000-0x000007FEF6BCD000-memory.dmp
memory/2088-2-0x0000000000630000-0x00000000006B0000-memory.dmp
memory/2088-3-0x000007FEF6230000-0x000007FEF6BCD000-memory.dmp
\Users\Admin\AppData\Local\Temp\Runtime.MSIL.1.0.0.0\NativePRo.dll
| MD5 | d80d1b6d9a6d5986fa47f6f8487030e1 |
| SHA1 | 8f5773bf9eca43b079c1766b2e9f44cc90bd9215 |
| SHA256 | 446128f1712da8064d0197376184315cb529ed26ed9122f7b171bb208e22c0c3 |
| SHA512 | 9fcf0105c2c9ee81c526d41633d93579bb8e2837989d77fb4a6523440415ec2d7fa46ac9ae4e55ecebd99126837817ac308cc079475de02667b21727a43d74cc |
memory/2088-14-0x0000000000630000-0x00000000006B0000-memory.dmp
memory/2088-15-0x00000000004E0000-0x00000000004EE000-memory.dmp
memory/2088-16-0x000000001B200000-0x000000001B25C000-memory.dmp
memory/2088-17-0x00000000012B0000-0x00000000012FE000-memory.dmp
\??\c:\Users\Admin\AppData\Local\Temp\viix2i0u.cmdline
| MD5 | e812b334c2cba2a0ad9240e7b647c50d |
| SHA1 | 03530f5276de50144b8f79b91a833af6a3055e8b |
| SHA256 | 3bb6890329216be1d35bdcf9ecc3e9df74931b3468fe69b3dc3d786586827d14 |
| SHA512 | 57524bdc2be2522e3899b74da770fde6d55a301d4672348ddf90e04e6d56a3546dc99dd961ad1bed95080cfeda293e8f61649a0cdf7e8e72fbe55776e0552676 |
\??\c:\Users\Admin\AppData\Local\Temp\viix2i0u.0.cs
| MD5 | 2fcb165ed62080a094dc317178fcc368 |
| SHA1 | ede1e71260bd57616388c192aec684498453af97 |
| SHA256 | 937d2d4a2b9e43fb0f5ad3b3c0a6baf79039417575c4e861c497a69ea283e565 |
| SHA512 | 203b177127da112964e4bec9f6cb7dcccc573366a67e344015bb72d13311322c52eb294ee6057d0e978d925373a39366dd95e320c0b2f31b945fae431de6ebe9 |
memory/2924-23-0x00000000020E0000-0x0000000002160000-memory.dmp
\??\c:\Users\Admin\AppData\Local\Temp\CSC693E.tmp
| MD5 | 44aa3ec5305aada3f5f0ef67f1c6adaa |
| SHA1 | 5f7d67230ffe2ce924457268a4e258e1fd76125f |
| SHA256 | 25e088d7e38cb9a169c13d87659e261a18083c9b492a0597b651735946f61ecf |
| SHA512 | 7b5e64a649d1045a7434a95670da97f5f42bf3eaeb5d5e897411ec31cda5bf8c31e895b8850c01d2a8e2267f90640c17d564db8250c43fac563b95ad3a0c1d4f |
C:\Users\Admin\AppData\Local\Temp\RES693F.tmp
| MD5 | 4258bd858d83677a09b2e8b8ddcbc812 |
| SHA1 | 3f35ecf509b10009872cae87e5961f704b2b29a3 |
| SHA256 | 6e78e1f8dd3ebd779bc807eb7d4c8c1a20cde22c44b9380c2acec6b815f6b032 |
| SHA512 | 045639838823a768674ff7c4f5fb79c1f230bef9a61d1af165c3850012057960d4e0b22b765626d849cc02db1021b2c1f9cafc9d2a3d3175bb0d0a6c597b105b |
C:\Users\Admin\AppData\Local\Temp\viix2i0u.dll
| MD5 | f4fe079e8aaa36dd94497170a4ad757b |
| SHA1 | bbc5b3f6d450a2240ee2128be4c8f17863c3380f |
| SHA256 | dd8f7d80273e77297347ba38a57d996bf2c3dbf125ed4250eaa2e1161e287729 |
| SHA512 | ce386d930781aef5c7811ea03fb9f1770e99be407a8a5a6ff4d7c94302c08431d35c899152237d48cb61713fd639c49e8cd42d051b1ffbd589230d97fcddb10e |
memory/2088-31-0x000000001AF30000-0x000000001AF46000-memory.dmp
memory/2088-33-0x0000000000550000-0x0000000000562000-memory.dmp
memory/2088-34-0x0000000001280000-0x0000000001298000-memory.dmp
memory/2088-36-0x0000000000630000-0x00000000006B0000-memory.dmp
memory/2088-35-0x0000000000570000-0x0000000000580000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Cab8393.tmp
| MD5 | ac05d27423a85adc1622c714f2cb6184 |
| SHA1 | b0fe2b1abddb97837ea0195be70ab2ff14d43198 |
| SHA256 | c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d |
| SHA512 | 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d |
memory/2088-53-0x000007FEF6230000-0x000007FEF6BCD000-memory.dmp
memory/2088-54-0x0000000000630000-0x00000000006B0000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\TarF04D.tmp
| MD5 | 9c0c641c06238516f27941aa1166d427 |
| SHA1 | 64cd549fb8cf014fcd9312aa7a5b023847b6c977 |
| SHA256 | 4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f |
| SHA512 | 936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06 |
memory/2088-73-0x0000000000630000-0x00000000006B0000-memory.dmp
memory/2088-74-0x0000000000630000-0x00000000006B0000-memory.dmp
memory/2088-75-0x0000000000630000-0x00000000006B0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-04 07:13
Reported
2024-01-04 07:15
Platform
win10v2004-20231215-en
Max time kernel
144s
Max time network
141s
Command Line
Signatures
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\assembly | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
| File created | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
| File opened for modification | C:\Windows\assembly\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeBackupPrivilege | N/A | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3976 wrote to memory of 2484 | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe |
| PID 3976 wrote to memory of 2484 | N/A | C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe | C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe
"C:\Users\Admin\AppData\Local\Temp\403990c6cbb042f7c1f5e57177272f81.exe"
C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
dw20.exe -x -s 876
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.181.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 194.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 158.240.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.241.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 176.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 32.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 114.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.134.32:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | udp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.16.110.114:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| US | 204.79.197.200:443 | tcp | |
| US | 204.79.197.200:443 | tcp | |
| US | 204.79.197.200:443 | tcp | |
| US | 204.79.197.200:443 | tcp | |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| GB | 96.17.178.176:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.134.18:80 | tcp | |
| GB | 88.221.134.18:80 | tcp | |
| GB | 88.221.134.18:80 | tcp | |
| GB | 88.221.134.18:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | udp | |
| GB | 87.248.205.0:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.134.18:80 | tcp | |
| GB | 88.221.134.18:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| GB | 88.221.134.18:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| GB | 87.248.205.0:80 | tcp | |
| US | 8.8.8.8:53 | udp | |
| N/A | 20.189.173.5:443 | tcp | |
| US | 192.229.221.95:80 | tcp | |
| US | 8.8.8.8:53 | udp |
Files
memory/3976-0-0x00007FF958DF0000-0x00007FF959791000-memory.dmp
memory/3976-3-0x0000000000FF0000-0x0000000001000000-memory.dmp
memory/3976-2-0x00007FF958DF0000-0x00007FF959791000-memory.dmp
memory/3976-1-0x000000001B780000-0x000000001B78C000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Runtime.MSIL.1.0.0.0\NativePRo.dll
| MD5 | d80d1b6d9a6d5986fa47f6f8487030e1 |
| SHA1 | 8f5773bf9eca43b079c1766b2e9f44cc90bd9215 |
| SHA256 | 446128f1712da8064d0197376184315cb529ed26ed9122f7b171bb208e22c0c3 |
| SHA512 | 9fcf0105c2c9ee81c526d41633d93579bb8e2837989d77fb4a6523440415ec2d7fa46ac9ae4e55ecebd99126837817ac308cc079475de02667b21727a43d74cc |
C:\Users\Admin\AppData\Local\Temp\Runtime.MSIL.1.0.0.0\NativePRo.dll
| MD5 | d41d8cd98f00b204e9800998ecf8427e |
| SHA1 | da39a3ee5e6b4b0d3255bfef95601890afd80709 |
| SHA256 | e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 |
| SHA512 | cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
memory/3976-14-0x0000000000FF0000-0x0000000001000000-memory.dmp
memory/3976-18-0x000000001BA30000-0x000000001BA8C000-memory.dmp
memory/3976-19-0x000000001C010000-0x000000001C4DE000-memory.dmp
memory/3976-21-0x000000001B8E0000-0x000000001B92E000-memory.dmp
memory/3976-20-0x000000001C4E0000-0x000000001C57C000-memory.dmp
memory/3976-15-0x0000000001170000-0x000000000117E000-memory.dmp
memory/3976-28-0x00007FF958DF0000-0x00007FF959791000-memory.dmp