Analysis
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max time kernel
292s -
max time network
252s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
01-07-2024 05:03
Static task
static1
Behavioral task
behavioral1
Sample
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe
Resource
win10-20240404-en
General
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Target
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe
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Size
5.0MB
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MD5
0c08920d01eeb7bc6e2c909e750d6183
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SHA1
2221bfda019f34b8ad75a24e5d70d70613fe9f7e
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SHA256
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae
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SHA512
b61e6c4bc8474d205a6df9d48e059831947b372ff87c16f950b2d1cfde0102f2815bf61c3b8d1968d632a461d622103098a5760e44e72c0987d84aa208226e26
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SSDEEP
98304:CbznFGZc1nc7Qbx59/31/sSZEq1N0D5dwt6ypECFUL9hdqqkQxj:EEMncEbx59f1Eq1qlKpEQyvhkQ9
Malware Config
Signatures
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Detect Socks5Systemz Payload 1 IoCs
Processes:
resource yara_rule behavioral2/memory/4496-85-0x0000000000830000-0x00000000008D1000-memory.dmp family_socks5systemz -
Socks5Systemz
Socks5Systemz is a botnet written in C++.
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Executes dropped EXE 3 IoCs
Processes:
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmpvkfreeaudiosaver.exevkfreeaudiosaver.exepid process 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp 4444 vkfreeaudiosaver.exe 4496 vkfreeaudiosaver.exe -
Loads dropped DLL 1 IoCs
Processes:
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmppid process 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp -
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
Processes:
description ioc Destination IP 91.211.247.248 -
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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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmppid process 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmpdescription pid process target process PID 824 wrote to memory of 192 824 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp PID 824 wrote to memory of 192 824 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp PID 824 wrote to memory of 192 824 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp PID 192 wrote to memory of 4444 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp vkfreeaudiosaver.exe PID 192 wrote to memory of 4444 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp vkfreeaudiosaver.exe PID 192 wrote to memory of 4444 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp vkfreeaudiosaver.exe PID 192 wrote to memory of 4496 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp vkfreeaudiosaver.exe PID 192 wrote to memory of 4496 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp vkfreeaudiosaver.exe PID 192 wrote to memory of 4496 192 4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp vkfreeaudiosaver.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe"C:\Users\Admin\AppData\Local\Temp\4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\is-3BCTK.tmp\4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp"C:\Users\Admin\AppData\Local\Temp\is-3BCTK.tmp\4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmp" /SL5="$70220,4976259,54272,C:\Users\Admin\AppData\Local\Temp\4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe"C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe" -i3⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe"C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exe" -s3⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Temp\is-3BCTK.tmp\4eff1ef626264e3f1d795dfd71ea0b217810b5902dcb46bf914e9466ba81aeae.tmpFilesize
680KB
MD591abaa26324a0747e32442afeaf939d0
SHA190133d4c1b101d8fb8d05ed7cc005b2359f62b86
SHA2560041e3aef210e7e0566bbb3ec0e5dc34f0d65ec5563a971fa862559da249736a
SHA512a5c557fbc8dc8d44814a3527398da439d494568e7abaa32c0e28ec2417b1aba467a66311fc308bec8e8c7eff8bab6041a1dcc7e4e6360896de702ebbb46781e5
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C:\Users\Admin\AppData\Local\VK Free Audio Saver\vkfreeaudiosaver.exeFilesize
3.3MB
MD50c66c4f91ef4a63c6fe9c2ed4ea725c8
SHA1f5dc6d81d22329bb8944599ebad3f63324b8a0d0
SHA25634ce10408fa0869b7bf4ffc253a8adc7e7b5375809fea8a538ca617884fa657f
SHA5125525e31815477bb47d44446ab5c89d621766a1e5252326853ab3284934d84ea91099576113fd6a0f6c7fe6bdb368e6591a92cc1ddd2c0cb012bcb1f83b1c5ad1
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\Users\Admin\AppData\Local\Temp\is-EAH8D.tmp\_isetup\_iscrypt.dllFilesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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memory/192-72-0x00007FFDE3620000-0x00007FFDE37FB000-memory.dmpFilesize
1.9MB
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memory/192-16-0x00007FFDE3620000-0x00007FFDE37FB000-memory.dmpFilesize
1.9MB
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memory/192-68-0x0000000000400000-0x00000000004BA000-memory.dmpFilesize
744KB
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memory/824-4-0x00007FFDE3620000-0x00007FFDE37FB000-memory.dmpFilesize
1.9MB
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memory/824-67-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
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memory/824-0-0x0000000000400000-0x0000000000414000-memory.dmpFilesize
80KB
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memory/4444-59-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4444-60-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4444-64-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-82-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-98-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-76-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-79-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-69-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-85-0x0000000000830000-0x00000000008D1000-memory.dmpFilesize
644KB
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memory/4496-87-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-92-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-95-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-73-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-101-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-104-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-108-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-111-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-114-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-117-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-120-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-123-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-126-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB
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memory/4496-131-0x0000000000400000-0x0000000000745000-memory.dmpFilesize
3.3MB