Analysis
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max time kernel
135s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
30-03-2023 14:05
Static task
static1
Behavioral task
behavioral1
Sample
build2.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
build2.exe
Resource
win10v2004-20230220-en
General
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Target
build2.exe
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Size
416KB
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MD5
aa18968e6cfbdc382ada6a3ed2852085
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SHA1
4a41fa1a182916d5790aa2071106b3441d64468d
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SHA256
c165c8db38ef8dd8c33d103b5ee78e9ddafd8081ff0c7c035fa5251f970e6cfb
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SHA512
8ffdacca2b003438fd4874e7c88beedb6ad8cf9cd5b36fda5907751e06a85a829e7d9ce7335fb59590462f78054722bccba511b21db838368c661d993000a845
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SSDEEP
6144:2tSK7xCXvZt/cuPXL/G1a5i7VHUOepEXqZCbt+sEtDDTS:2tSKtavZLPrCa5YHUjpdQbIzS
Malware Config
Extracted
vidar
3.2
5df88deb5dde677ba658b77ad5f60248
https://steamcommunity.com/profiles/76561199489580435
https://t.me/tabootalks
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profile_id_v2
5df88deb5dde677ba658b77ad5f60248
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user_agent
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 OPR/91.0.4516.79
Signatures
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
build2.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation build2.exe -
Loads dropped DLL 2 IoCs
Processes:
build2.exepid process 2716 build2.exe 2716 build2.exe -
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 cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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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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Suspicious use of SetThreadContext 1 IoCs
Processes:
build2.exedescription pid process target process PID 2144 set thread context of 2716 2144 build2.exe build2.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
build2.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 3564 timeout.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
build2.exepid process 2716 build2.exe 2716 build2.exe -
Suspicious use of WriteProcessMemory 15 IoCs
Processes:
build2.exebuild2.execmd.exedescription pid process target process PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2144 wrote to memory of 2716 2144 build2.exe build2.exe PID 2716 wrote to memory of 4064 2716 build2.exe cmd.exe PID 2716 wrote to memory of 4064 2716 build2.exe cmd.exe PID 2716 wrote to memory of 4064 2716 build2.exe cmd.exe PID 4064 wrote to memory of 3564 4064 cmd.exe timeout.exe PID 4064 wrote to memory of 3564 4064 cmd.exe timeout.exe PID 4064 wrote to memory of 3564 4064 cmd.exe timeout.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\build2.exe"C:\Users\Admin\AppData\Local\Temp\build2.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2144 -
C:\Users\Admin\AppData\Local\Temp\build2.exe"C:\Users\Admin\AppData\Local\Temp\build2.exe"2⤵
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2716 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\build2.exe" & exit3⤵
- Suspicious use of WriteProcessMemory
PID:4064 -
C:\Windows\SysWOW64\timeout.exetimeout /t 64⤵
- Delays execution with timeout.exe
PID:3564
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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C:\ProgramData\mozglue.dllFilesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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C:\ProgramData\nss3.dllFilesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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memory/2144-135-0x00000000048D0000-0x0000000004927000-memory.dmpFilesize
348KB
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memory/2716-134-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/2716-136-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/2716-137-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/2716-138-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/2716-148-0x0000000061E00000-0x0000000061EF3000-memory.dmpFilesize
972KB
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memory/2716-216-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/2716-217-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/2716-219-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB