Analysis
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max time kernel
303s -
max time network
310s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
12-01-2024 13:28
Behavioral task
behavioral1
Sample
build.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
build.exe
Resource
win10v2004-20231215-en
General
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Target
build.exe
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Size
1.6MB
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MD5
15eba7d0774bde08d568decf06d12bea
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SHA1
353a759556e0763fb3929b4e7832ec921f4dccf8
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SHA256
c024b744939bf56b0b8ace99b765be45985d9942b4bf8141eeebd723ab30f095
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SHA512
cd1ffa0f2c1180548b33da9738f1e39a1e5e2ea7a5f6cd7c17a5b8bc0f298c9184a311ed012c0e407df7fbadc85b6332b83016efeebf761091fedecb2c8ef741
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SSDEEP
49152:/kTq24GjdGSiqkqXfd+/9AqYanieKdsx:/1EjdGSiqkqXf0FLYW
Malware Config
Extracted
stealerium
https://discord.com/api/webhooks/1195358238842044506/G9asg_ROS67f76luy2HcmQaqPL-g8wQe7Wq2rI7i-9xFGjH8kRD3cQ_zRKvuxI_PU_Hw
Signatures
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Stealerium
An open source info stealer written in C# first seen in May 2022.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
Processes:
build.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 build.exe Key opened \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 build.exe Key opened \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 build.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 51 icanhazip.com -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
build.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0 build.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier build.exe -
Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
build.exepid process 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe 5108 build.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
build.exepid process 5108 build.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
build.exemsiexec.exedescription pid process Token: SeDebugPrivilege 5108 build.exe Token: SeSecurityPrivilege 1368 msiexec.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
build.exepid process 5108 build.exe -
Suspicious use of WriteProcessMemory 21 IoCs
Processes:
build.execmd.execmd.exedescription pid process target process PID 5108 wrote to memory of 1756 5108 build.exe cmd.exe PID 5108 wrote to memory of 1756 5108 build.exe cmd.exe PID 5108 wrote to memory of 1756 5108 build.exe cmd.exe PID 1756 wrote to memory of 4416 1756 cmd.exe chcp.com PID 1756 wrote to memory of 4416 1756 cmd.exe chcp.com PID 1756 wrote to memory of 4416 1756 cmd.exe chcp.com PID 1756 wrote to memory of 8 1756 cmd.exe netsh.exe PID 1756 wrote to memory of 8 1756 cmd.exe netsh.exe PID 1756 wrote to memory of 8 1756 cmd.exe netsh.exe PID 1756 wrote to memory of 1212 1756 cmd.exe findstr.exe PID 1756 wrote to memory of 1212 1756 cmd.exe findstr.exe PID 1756 wrote to memory of 1212 1756 cmd.exe findstr.exe PID 5108 wrote to memory of 4796 5108 build.exe cmd.exe PID 5108 wrote to memory of 4796 5108 build.exe cmd.exe PID 5108 wrote to memory of 4796 5108 build.exe cmd.exe PID 4796 wrote to memory of 1244 4796 cmd.exe chcp.com PID 4796 wrote to memory of 1244 4796 cmd.exe chcp.com PID 4796 wrote to memory of 1244 4796 cmd.exe chcp.com PID 4796 wrote to memory of 3604 4796 cmd.exe netsh.exe PID 4796 wrote to memory of 3604 4796 cmd.exe netsh.exe PID 4796 wrote to memory of 3604 4796 cmd.exe netsh.exe -
outlook_office_path 1 IoCs
Processes:
build.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 build.exe -
outlook_win_path 1 IoCs
Processes:
build.exedescription ioc process Key opened \REGISTRY\USER\S-1-5-21-635608581-3370340891-292606865-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 build.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\build.exe"C:\Users\Admin\AppData\Local\Temp\build.exe"1⤵
- Accesses Microsoft Outlook profiles
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:5108 -
C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All2⤵
- Suspicious use of WriteProcessMemory
PID:1756 -
C:\Windows\SysWOW64\chcp.comchcp 650013⤵PID:4416
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C:\Windows\SysWOW64\netsh.exenetsh wlan show profile3⤵PID:8
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C:\Windows\SysWOW64\findstr.exefindstr All3⤵PID:1212
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C:\Windows\SysWOW64\cmd.exe"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid2⤵
- Suspicious use of WriteProcessMemory
PID:4796 -
C:\Windows\SysWOW64\chcp.comchcp 650013⤵PID:1244
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C:\Windows\SysWOW64\netsh.exenetsh wlan show networks mode=bssid3⤵PID:3604
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C:\Windows\system32\msiexec.exeC:\Windows\system32\msiexec.exe /V1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1368
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\aca07b2a4dde0080b086b91261def966\Admin@VFMDDVWB_en-US\Browsers\Firefox\Bookmarks.txt
Filesize105B
MD52e9d094dda5cdc3ce6519f75943a4ff4
SHA15d989b4ac8b699781681fe75ed9ef98191a5096c
SHA256c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142
SHA512d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7
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C:\Users\Admin\AppData\Local\aca07b2a4dde0080b086b91261def966\Admin@VFMDDVWB_en-US\Directories\OneDrive.txt
Filesize25B
MD5966247eb3ee749e21597d73c4176bd52
SHA11e9e63c2872cef8f015d4b888eb9f81b00a35c79
SHA2568ddfc481b1b6ae30815ecce8a73755862f24b3bb7fdebdbf099e037d53eb082e
SHA512bd30aec68c070e86e3dec787ed26dd3d6b7d33d83e43cb2d50f9e2cff779fee4c96afbbe170443bd62874073a844beb29a69b10c72c54d7d444a8d86cfd7b5aa
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C:\Users\Admin\AppData\Local\aca07b2a4dde0080b086b91261def966\Admin@VFMDDVWB_en-US\Directories\Startup.txt
Filesize24B
MD568c93da4981d591704cea7b71cebfb97
SHA1fd0f8d97463cd33892cc828b4ad04e03fc014fa6
SHA256889ed51f9c16a4b989bda57957d3e132b1a9c117ee84e208207f2fa208a59483
SHA51263455c726b55f2d4de87147a75ff04f2daa35278183969ccf185d23707840dd84363bec20d4e8c56252196ce555001ca0e61b3f4887d27577081fdef9e946402
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C:\Users\Admin\AppData\Local\aca07b2a4dde0080b086b91261def966\Admin@VFMDDVWB_en-US\Directories\Videos.txt
Filesize23B
MD51fddbf1169b6c75898b86e7e24bc7c1f
SHA1d2091060cb5191ff70eb99c0088c182e80c20f8c
SHA256a67aa329b7d878de61671e18cd2f4b011d11cbac67ea779818c6dafad2d70733
SHA51220bfeafde7fec1753fef59de467bd4a3dd7fe627e8c44e95fe62b065a5768c4508e886ec5d898e911a28cf6365f455c9ab1ebe2386d17a76f53037f99061fd4d
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Filesize
5KB
MD553cc007ac887e79be29b4def4cdde7cc
SHA14d9dfdf742397d5dce8dd698b67e7c20f26bcd91
SHA25685a6fe613d28ae1c42c840a54522935bd536ccfc3a6abfdfb1bcdb6ab1803f1f
SHA512fbc5c25b4094f01e3f6e08b1e34b31e58c16fb16e001e132525aa4a3be83a8cf5f812ad2b1a8758215743d897f61901a4529570abe1568be5ee7f4380f08e98c
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C:\Users\Admin\AppData\Local\aca07b2a4dde0080b086b91261def966\Admin@VFMDDVWB_en-US\System\Process.txt
Filesize4KB
MD5136a2c6156b3933ee4c19ca04b245ae9
SHA1974188a094653d6419525e739e352042bae558f9
SHA2563fdd6eed15e0f13c2a9542d3b1b95480204b2d2a42c941c723d5a97a04580708
SHA512d20e1d9ac6124604e72e60b0ddd529139dc7150bc837be5050008efd991c73fab0db28856a96a8f462b1dd1e720226562613b536f42d0a210544f2767280aec0
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C:\Users\Admin\AppData\Local\aca07b2a4dde0080b086b91261def966\Admin@VFMDDVWB_en-US\System\ProductKey.txt
Filesize29B
MD571eb5479298c7afc6d126fa04d2a9bde
SHA1a9b3d5505cf9f84bb6c2be2acece53cb40075113
SHA256f6cadfd4e4c25ff3b8cffe54a2af24a757a349abbf4e1142ec4c9789347fe8b3
SHA5127c6687e21d31ec1d6d2eff04b07b465f875fd80df26677f1506b14158444cf55044eb6674880bd5bd44f04ff73023b26cb19b8837427a1d6655c96df52f140bd
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Filesize
19B
MD513eafa6775c760108643a82a03806bf6
SHA1e1e859e057697cb054374c4624cbf4650a61d7d8
SHA25684922455697d73da89f891e91b940683dadb554f7f9c6bb56ba09f9428f1cb2e
SHA5123f680e0a3f2f56fcf6743fb49cd6f76a48084bd37acb35dd92703957fa367500d2aa7e58c65a02de96170c0dc93c3c7951fce7a635af13fa3f1f3f684f80b42a