Analysis
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max time kernel
150s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
02-02-2023 07:08
Static task
static1
Behavioral task
behavioral1
Sample
Document#749450pdf.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
Document#749450pdf.exe
Resource
win10v2004-20221111-en
General
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Target
Document#749450pdf.exe
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Size
657KB
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MD5
15ae90fffd2f5fd0d3c28fdb6a1ed0b5
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SHA1
4fd3d2470cd1c1e83bdac50ba103b1550fd5c1b9
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SHA256
c2882a42e9ad87ef5260d3299307dae39af71853c75b44441c0dec497bc5c175
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SHA512
6491b03ecaceacf0a1d75ac93a65e0ad03bf2e70c45dece60ef9d1cd3b8c3c691de1a13dd713c4f78b0a8a140e336c5344acd6f67ee1eacd799bad51bdba004b
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SSDEEP
12288:b7EWNDJccwIWYh7jQofzmAuPMrkQUmGjbPhYYHNZcVbOcNjRtBnMAr87:MUlyYtjQG7uPMrkqnYt6OsNfC7
Malware Config
Signatures
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
Processes:
Document#749450pdf.exeDocument#749450pdf.exedescription ioc process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe Document#749450pdf.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe Document#749450pdf.exe -
Loads dropped DLL 1 IoCs
Processes:
Document#749450pdf.exepid process 1208 Document#749450pdf.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
Document#749450pdf.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce Document#749450pdf.exe Set value (str) \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Inconsolately = "C:\\Users\\Admin\\AppData\\Roaming\\Amtsforvaltere\\Kviltningerne90.exe" Document#749450pdf.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
Processes:
Document#749450pdf.exepid process 3424 Document#749450pdf.exe 3424 Document#749450pdf.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
Processes:
Document#749450pdf.exeDocument#749450pdf.exepid process 1208 Document#749450pdf.exe 3424 Document#749450pdf.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
Document#749450pdf.exedescription pid process target process PID 1208 set thread context of 3424 1208 Document#749450pdf.exe Document#749450pdf.exe -
Drops file in Windows directory 1 IoCs
Processes:
Document#749450pdf.exedescription ioc process File opened for modification C:\Windows\resources\0409\Vre\Prstekrave\Uskadeliggjort.Pun Document#749450pdf.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
Document#749450pdf.exepid process 1208 Document#749450pdf.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
Document#749450pdf.exepid process 3424 Document#749450pdf.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
Document#749450pdf.exedescription pid process target process PID 1208 wrote to memory of 3424 1208 Document#749450pdf.exe Document#749450pdf.exe PID 1208 wrote to memory of 3424 1208 Document#749450pdf.exe Document#749450pdf.exe PID 1208 wrote to memory of 3424 1208 Document#749450pdf.exe Document#749450pdf.exe PID 1208 wrote to memory of 3424 1208 Document#749450pdf.exe Document#749450pdf.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe"C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe"C:\Users\Admin\AppData\Local\Temp\Document#749450pdf.exe"2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\nsf88FD.tmp\System.dllFilesize
11KB
MD59625d5b1754bc4ff29281d415d27a0fd
SHA180e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA256c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
SHA512dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b
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memory/1208-138-0x0000000077A40000-0x0000000077BE3000-memory.dmpFilesize
1.6MB
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memory/1208-134-0x00000000041B0000-0x0000000006855000-memory.dmpFilesize
38.6MB
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memory/1208-135-0x00007FF871450000-0x00007FF871645000-memory.dmpFilesize
2.0MB
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memory/1208-136-0x0000000077A40000-0x0000000077BE3000-memory.dmpFilesize
1.6MB
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memory/1208-133-0x00000000041B0000-0x0000000006855000-memory.dmpFilesize
38.6MB
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memory/3424-137-0x0000000000000000-mapping.dmp
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memory/3424-139-0x0000000000400000-0x0000000001654000-memory.dmpFilesize
18.3MB
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memory/3424-140-0x0000000001660000-0x0000000003D05000-memory.dmpFilesize
38.6MB
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memory/3424-141-0x00007FF871450000-0x00007FF871645000-memory.dmpFilesize
2.0MB
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memory/3424-142-0x0000000077A40000-0x0000000077BE3000-memory.dmpFilesize
1.6MB
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memory/3424-143-0x0000000001660000-0x0000000003D05000-memory.dmpFilesize
38.6MB
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memory/3424-144-0x0000000077A40000-0x0000000077BE3000-memory.dmpFilesize
1.6MB