Analysis
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max time kernel
145s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
29-01-2023 21:59
Static task
static1
Behavioral task
behavioral1
Sample
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe
Resource
win10v2004-20220901-en
General
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Target
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe
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Size
132KB
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MD5
dfdbbafef5cf6b3358a099dac867fec6
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SHA1
fa970f770679a60d0eea9f7e834414335a547721
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SHA256
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4
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SHA512
5f248feb2c07bd8041d54d620219ef807cdbaa296d657b73063ec38093588049cc12f190164433a9c3be7278b63e5cb224f2e173117426b52c61a004df362b30
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SSDEEP
1536:AZHtnIRYS5/Cac/Lo58OT4o/jbkZGcEXH+zX6JaB4a1L73rGUn2MEz:Ph6g8CRTHSNB4a137GU2X
Malware Config
Extracted
guloader
https://drive.google.com/uc?export=download&id=1-HLxBTGgDQAJoi4W7itkL8n6nA0XOFJK
Signatures
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Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
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Guloader payload 4 IoCs
Processes:
resource yara_rule behavioral1/memory/1532-56-0x00000000003D0000-0x00000000003DB000-memory.dmp family_guloader behavioral1/memory/776-61-0x0000000000B0CE5E-mapping.dmp family_guloader behavioral1/memory/776-65-0x0000000000090000-0x0000000000190000-memory.dmp family_guloader behavioral1/memory/776-71-0x0000000000090000-0x0000000000190000-memory.dmp family_guloader -
Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
Processes:
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exeRegAsm.exedescription ioc process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe RegAsm.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
RegAsm.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce RegAsm.exe Set value (str) \REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\subfolder1\\system.exe" RegAsm.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs
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Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
Processes:
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exeRegAsm.exepid process 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe 776 RegAsm.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exedescription pid process target process PID 1532 set thread context of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe -
Suspicious behavior: MapViewOfSection 1 IoCs
Processes:
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exepid process 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exepid process 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe -
Suspicious use of WriteProcessMemory 8 IoCs
Processes:
caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exedescription pid process target process PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe PID 1532 wrote to memory of 776 1532 caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe RegAsm.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe"C:\Users\Admin\AppData\Local\Temp\caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe"1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\caad589daa525d04613405455e0304f0197ea33a3aa9e8152a99249dac2f42a4.exe"2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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memory/776-65-0x0000000000090000-0x0000000000190000-memory.dmpFilesize
1024KB
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memory/776-71-0x0000000000090000-0x0000000000190000-memory.dmpFilesize
1024KB
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memory/776-73-0x0000000076F30000-0x00000000770B0000-memory.dmpFilesize
1.5MB
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memory/776-61-0x0000000000B0CE5E-mapping.dmp
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memory/776-72-0x0000000076D50000-0x0000000076EF9000-memory.dmpFilesize
1.7MB
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memory/776-66-0x0000000076D50000-0x0000000076EF9000-memory.dmpFilesize
1.7MB
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memory/776-69-0x0000000076F30000-0x00000000770B0000-memory.dmpFilesize
1.5MB
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memory/1532-57-0x0000000076D50000-0x0000000076EF9000-memory.dmpFilesize
1.7MB
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memory/1532-56-0x00000000003D0000-0x00000000003DB000-memory.dmpFilesize
44KB
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memory/1532-70-0x00000000003D0000-0x00000000003DB000-memory.dmpFilesize
44KB
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memory/1532-64-0x0000000076F30000-0x00000000770B0000-memory.dmpFilesize
1.5MB
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memory/1532-63-0x0000000076F30000-0x00000000770B0000-memory.dmpFilesize
1.5MB
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memory/1532-59-0x0000000074DA1000-0x0000000074DA3000-memory.dmpFilesize
8KB
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memory/1532-74-0x00000000003D0000-0x00000000003DB000-memory.dmpFilesize
44KB
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memory/1532-75-0x0000000076F30000-0x00000000770B0000-memory.dmpFilesize
1.5MB