Malware Analysis Report

2025-03-15 06:55

Sample ID 231216-blevksbce2
Target b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715
SHA256 b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715
Tags
orcus
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715

Threat Level: Known bad

The file b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715 was found to be: Known bad.

Malicious Activity Summary

orcus

Orcurs Rat Executable

Orcus family

Orcus main payload

Drops desktop.ini file(s)

Drops file in Windows directory

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-16 01:13

Signatures

Orcurs Rat Executable

Description Indicator Process Target
N/A N/A N/A N/A

Orcus family

orcus

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

2023-12-16 01:13

Reported

2023-12-16 01:16

Platform

win7-20231129-en

Max time kernel

117s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe

"C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.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\nfk4gp5h.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\RESFBED.tmp" "c:\Users\Admin\AppData\Local\Temp\CSCFBEC.tmp"

Network

N/A

Files

memory/2240-1-0x000007FEF5410000-0x000007FEF5DAD000-memory.dmp

memory/2240-0-0x00000000022D0000-0x000000000232C000-memory.dmp

memory/2240-2-0x0000000000280000-0x000000000028E000-memory.dmp

memory/2240-3-0x0000000002100000-0x0000000002180000-memory.dmp

memory/2240-4-0x000007FEF5410000-0x000007FEF5DAD000-memory.dmp

\??\c:\Users\Admin\AppData\Local\Temp\nfk4gp5h.cmdline

MD5 764fd76f3f831c418e2ac4a925a5dc71
SHA1 538b7b76ab9a2b54879a87e74a9b0aba9063b0b9
SHA256 b08736329152b083e9e722d4f0768155274da3b5214e661257b92777b0dbead0
SHA512 698ae81d6294d24d328017812dffa22312a1f20dfd9f7f01b00f7f225f246b025aa4e3f97abdcea9d916396f4e67864a7679d36a988ec9941e9573cc8b7de4d3

\??\c:\Users\Admin\AppData\Local\Temp\nfk4gp5h.0.cs

MD5 2b14ae8b54d216abf4d228493ceca44a
SHA1 d134351498e4273e9d6391153e35416bc743adef
SHA256 4e1cc3da1f7bf92773aae6cffa6d61bfc3e25aead3ad947f6215f93a053f346c
SHA512 5761b605add10ae3ef80f3b8706c8241b4e8abe4ac3ce36b7be8a97d08b08da5a72fedd5e976b3c9e1c463613a943ebb5d323e6a075ef6c7c3b1abdc0d53ac05

\??\c:\Users\Admin\AppData\Local\Temp\CSCFBEC.tmp

MD5 4d13d296ee64e63e5fce603aaa28eaed
SHA1 6dcfe2bdfe9ea5502dafd9b77ff74d10eb0bbb34
SHA256 892b5d3efd1ea90d59d0df0cc38bdc41af95fde416a8e1e025304462220840ff
SHA512 daf5775994c68ee6c3ea9603f9931ffb1a3141071e90ed210f8b29a5e232bad1f23f351d701c307e9c2d870aa401894a80cebded53193571a1a1d730914ac4d0

C:\Users\Admin\AppData\Local\Temp\RESFBED.tmp

MD5 bd6a79a559b0b308441e07a522b79989
SHA1 259d7d1eee0d0455e05b882245ef2869b3473a01
SHA256 6adf9cdb581125f805f8086a1fdbef3c00d43a8d1e016d6c500373f402b2580d
SHA512 763ad6cbcc95ac123a393daed4d8888d9a91e5428608392bdf436d5c6fec6358e52e88c590d4f6bf1dd9d20cfd1cd52d1d2a56a68d763b6e3241a84b7efd9d44

C:\Users\Admin\AppData\Local\Temp\nfk4gp5h.dll

MD5 22bd79191193deedac26ad5dec9ea304
SHA1 e10a96e0cd67fca6d6aa7db78cf7a21725947d55
SHA256 63468e6af93cf8da96ebc4526ebbc50b9a4d36d9b0e6ff8e8fe7b03632accaa3
SHA512 df51ac737b6231df28c8d4d703017b4d9ad8fad3bdc0054a2a130a5137017bfc0a6f053cd1231ffd13a74f833a4c4fb2da1e6293a46f75255389d79ec91366b7

memory/2240-17-0x00000000007D0000-0x00000000007E6000-memory.dmp

memory/2240-19-0x00000000002B0000-0x00000000002C2000-memory.dmp

memory/2240-20-0x0000000002100000-0x0000000002180000-memory.dmp

memory/2240-21-0x000007FEF5410000-0x000007FEF5DAD000-memory.dmp

memory/2240-22-0x0000000002100000-0x0000000002180000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-16 01:13

Reported

2023-12-16 01:16

Platform

win10v2004-20231215-en

Max time kernel

92s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe"

Signatures

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe N/A
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe N/A
File opened for modification C:\Windows\assembly\Desktop.ini C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe N/A
File opened for modification C:\Windows\assembly C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.exe

"C:\Users\Admin\AppData\Local\Temp\b7168a34637ac6e481638d9e4ad35ad73baf201695be358dfab0cb386bd1d715.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\rxc_jpde.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\RES4CE8.tmp" "c:\Users\Admin\AppData\Local\Temp\CSC4CE7.tmp"

Network

Country Destination Domain Proto
NL 52.142.223.178:80 tcp
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 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 23.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

memory/468-1-0x00000000012F0000-0x0000000001300000-memory.dmp

memory/468-0-0x00007FFEC2660000-0x00007FFEC3001000-memory.dmp

memory/468-3-0x00007FFEC2660000-0x00007FFEC3001000-memory.dmp

memory/468-2-0x000000001B950000-0x000000001B9AC000-memory.dmp

memory/468-6-0x000000001BB30000-0x000000001BB3E000-memory.dmp

memory/468-7-0x000000001C010000-0x000000001C4DE000-memory.dmp

memory/468-8-0x000000001C580000-0x000000001C61C000-memory.dmp

\??\c:\Users\Admin\AppData\Local\Temp\rxc_jpde.0.cs

MD5 99f896af7ba9810e05de66b887908440
SHA1 7fd5f665636d79f3ae74b01d0faf68c756ffbc5a
SHA256 b78bfa96da479a871390b6ee4eb4975f8c11cf72a7971cb13206bc0cd96ba775
SHA512 47623c8ce88b912666891fa3919f9b51eb0cc5b17792737346665d2eb972eb720726c5604a91725a57949db9ff99b4f236a54ba59f3fd1431469aa4f89657532

\??\c:\Users\Admin\AppData\Local\Temp\rxc_jpde.cmdline

MD5 0f5ecc51f5173139db253ed7707f650c
SHA1 ec9cd48b65e8e22bc663b19803e3efe180fc3287
SHA256 ac7c8f615e480899c398cd0869cf89568bf05e4ae9c5aa92ae85745b5b6145cc
SHA512 99e0a7d2cb906291a5fb88e892e859912bda2a498eaaf1a47b6167907a9dd82c8a2af626a591208d85f32825fd38972e95a384037de980a657cf088581557612

memory/2416-14-0x0000000000A70000-0x0000000000A80000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\RES4CE8.tmp

MD5 d8205df99daf2c188c07fc099397cf44
SHA1 cf30fffcf635063d5b17635ad1dc8ea59ba28151
SHA256 4590bc8ebadb433c74aa5270ccd6f3f10669c318e64d2f58b63937c03806fc0a
SHA512 bef71bcce49c082c255bdc38e6f373fa30419567aa4051806e6162443e464006d89fcccf5d7ad8b2157d3c2339a2b98b6fd505879c00c86e066f3b13793599b8

memory/468-22-0x000000001CC40000-0x000000001CC56000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\rxc_jpde.dll

MD5 f2a2209a551a8c71629331c52061a92f
SHA1 493a4de243a8c5fbd234211c732fa91532d7a525
SHA256 4354e979d43570798043b913c2f90c351b823b4368b2ecc7578493ad4468e70f
SHA512 5942a1d9b005b6b122fdcf98c5923f930ce3549a4a92d7c56da76e3c3c2a42bc1d0422b9d9e2f29e26b4f594d2185b7110e5fea406fee988002a98e084d69579

\??\c:\Users\Admin\AppData\Local\Temp\CSC4CE7.tmp

MD5 590f2d159a9b30813db42192988ff5f7
SHA1 370a1275c2f616a5dc5ee114708ab85c4211afc8
SHA256 ba516a062b031c324aca6cef8828361d077bb4651862cf4ef0a6484ffbc37181
SHA512 1fb86a16b095c3bb53a974b0d3fe89281c719386e1e1e5de3671957988eab86af518436f4356ecdba22091d2a828c7438f9d8a6d1fe8813a2a26bcabf62ffaf6

memory/468-24-0x000000001B890000-0x000000001B8A2000-memory.dmp

memory/468-25-0x000000001B800000-0x000000001B808000-memory.dmp

memory/468-26-0x00000000012F0000-0x0000000001300000-memory.dmp

memory/468-27-0x00007FFEC2660000-0x00007FFEC3001000-memory.dmp

memory/468-28-0x00000000012F0000-0x0000000001300000-memory.dmp

memory/468-29-0x00000000012F0000-0x0000000001300000-memory.dmp