Malware Analysis Report

2024-11-15 04:40

Sample ID 231105-dsgnvscb79
Target ConsoleApplication1_protected.exe
SHA256 35e27fd1445c11bcceede5059823629f428058d70d182dffc4d02ce0a5a5ae41
Tags
themida umbral evasion stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

35e27fd1445c11bcceede5059823629f428058d70d182dffc4d02ce0a5a5ae41

Threat Level: Known bad

The file ConsoleApplication1_protected.exe was found to be: Known bad.

Malicious Activity Summary

themida umbral evasion stealer trojan

Detect Umbral payload

Umbral

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Checks BIOS information in registry

Themida packer

Executes dropped EXE

Checks whether UAC is enabled

Drops file in System32 directory

Suspicious use of NtSetInformationThreadHideFromDebugger

Unsigned PE

Suspicious use of WriteProcessMemory

Views/modifies file attributes

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-11-05 03:16

Signatures

Themida packer

themida
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

2023-11-05 03:16

Reported

2023-11-05 03:16

Platform

win10v2004-20231023-en

Max time kernel

10s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe"

Signatures

Detect Umbral payload

Description Indicator Process Target
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Umbral

stealer umbral

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A

Themida packer

themida
Description Indicator Process Target
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Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\System32\Speech\x124HWpAAOxjQbpVb3iT2uY8lC4Hgn0E.exe C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A
File created C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe

"C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1_protected.exe"

C:\Windows\System32\Speech\x124HWpAAOxjQbpVb3iT2uY8lC4Hgn0E.exe

C:\Windows\System32\Speech\x124HWpAAOxjQbpVb3iT2uY8lC4Hgn0E.exe

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c pause > nul

C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe

C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe

C:\Windows\SYSTEM32\attrib.exe

"attrib.exe" +h +s "C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 121.252.72.23.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 39.142.81.104.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 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 gstatic.com udp
NL 142.250.179.131:443 gstatic.com tcp
US 8.8.8.8:53 131.179.250.142.in-addr.arpa udp

Files

memory/2828-0-0x00007FFBF84F0000-0x00007FFBF86E5000-memory.dmp

memory/2828-1-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/2828-2-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/2828-3-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/2828-4-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/2828-5-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/2828-6-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

C:\Windows\System32\Speech\x124HWpAAOxjQbpVb3iT2uY8lC4Hgn0E.exe

MD5 cebf7458dceffcbb81a290cf045beb27
SHA1 98c74fa610995d61d2ee78a2ea888e003e9f436d
SHA256 97d22321ba783bf6d2119320d38d776bbc6bef42fe3dadecf512e23bbdd29660
SHA512 144f0da1e8060e08340f1b349f7bbb17be298ee3d27d056d5603143125b8a9d7abb9485d0f5a2a26e2e50f0d5970ecf5fc3a9e665eece70414c6dc1504b04a91

C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe

MD5 ef2711e9aeeb23297016ef32b46a3c7e
SHA1 ba51f478c1118d7803620367cb97ce2ceba52a5a
SHA256 2fe65b8585389b60e44f688f755bbaefe5a3689737050a96c7586bd9b69a9759
SHA512 3c5453a308f0f8321141c2949540f7c3a7c9774eb9e8767210ee30e9745caee0e8bafa8806736f1ec04bd952aa411a5a38a6c97fe19bea3d8d86729571a7059f

C:\Windows\System32\Speech\Fo8hwdjszXcvIt64pmIY5R8iBiGY8cds.exe

MD5 ef2711e9aeeb23297016ef32b46a3c7e
SHA1 ba51f478c1118d7803620367cb97ce2ceba52a5a
SHA256 2fe65b8585389b60e44f688f755bbaefe5a3689737050a96c7586bd9b69a9759
SHA512 3c5453a308f0f8321141c2949540f7c3a7c9774eb9e8767210ee30e9745caee0e8bafa8806736f1ec04bd952aa411a5a38a6c97fe19bea3d8d86729571a7059f

memory/3016-16-0x0000017855AD0000-0x0000017855B10000-memory.dmp

memory/3016-17-0x00007FFBD8DA0000-0x00007FFBD9861000-memory.dmp

memory/2828-18-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/3016-19-0x0000017855F60000-0x0000017855F70000-memory.dmp

memory/2828-20-0x00007FFBF84F0000-0x00007FFBF86E5000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eooyuxbb.14e.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2672-30-0x00000237DC130000-0x00000237DC152000-memory.dmp

memory/2672-31-0x00007FFBD8DA0000-0x00007FFBD9861000-memory.dmp

memory/2672-33-0x00000237DC180000-0x00000237DC190000-memory.dmp

memory/2672-32-0x00000237DC180000-0x00000237DC190000-memory.dmp

memory/2672-34-0x00000237DC180000-0x00000237DC190000-memory.dmp

memory/2672-37-0x00007FFBD8DA0000-0x00007FFBD9861000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

memory/1224-39-0x00007FFBD8DA0000-0x00007FFBD9861000-memory.dmp

memory/1224-40-0x000002B9A4960000-0x000002B9A4970000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

memory/3016-51-0x00007FFBD8DA0000-0x00007FFBD9861000-memory.dmp

memory/1224-54-0x000002B9A4960000-0x000002B9A4970000-memory.dmp

memory/2828-56-0x00007FFBF84F0000-0x00007FFBF86E5000-memory.dmp

memory/2828-53-0x00007FF6DBBA0000-0x00007FF6DFCF4000-memory.dmp

memory/1224-57-0x00007FFBD8DA0000-0x00007FFBD9861000-memory.dmp

memory/3016-60-0x0000017870220000-0x0000017870296000-memory.dmp

memory/3016-61-0x00000178702A0000-0x00000178702F0000-memory.dmp

memory/3016-62-0x00000178578C0000-0x00000178578DE000-memory.dmp