Analysis
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max time kernel
142s -
max time network
154s -
platform
windows11-21h2_x64 -
resource
win11-20240802-en -
resource tags
arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system -
submitted
11/08/2024, 21:18
Static task
static1
Behavioral task
behavioral1
Sample
crt.exe
Resource
win10-20240404-en
Behavioral task
behavioral2
Sample
crt.exe
Resource
win7-20240729-en
Behavioral task
behavioral3
Sample
crt.exe
Resource
win10v2004-20240802-en
Behavioral task
behavioral4
Sample
crt.exe
Resource
win11-20240802-en
General
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Target
crt.exe
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Size
4.0MB
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MD5
d84d2af260f9d7114fa67cda49af1d27
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SHA1
7077ad2e5b59f20978ac6fa9f6c561cc6275ceec
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SHA256
0b0bbb98c9fab6db2e8c2e3a09f2f6ee998b73894c77fd17cdce2757024e0455
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SHA512
a5b831f4e669b88d8ea8426581442a7c2bf8f9e1da8f9745015905569f258afc1370b8f17007003df381e7200c9779c32ab032b2b72cc10f1708747b9bc4213d
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SSDEEP
49152:1vMdC1TH2IIGt6oPwe0tYYE1B1eoFlYDlGdNT696uvwBVqkzE/inX8rsnf7vGYM+:NsCtHPIQosrYDl2NT6suqS4CYNZA/QdX
Malware Config
Signatures
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Detect Socks5Systemz Payload 3 IoCs
resource yara_rule behavioral4/memory/3516-86-0x0000000000970000-0x0000000000A12000-memory.dmp family_socks5systemz behavioral4/memory/3516-113-0x0000000000970000-0x0000000000A12000-memory.dmp family_socks5systemz behavioral4/memory/3516-114-0x0000000000970000-0x0000000000A12000-memory.dmp family_socks5systemz -
Socks5Systemz
Socks5Systemz is a botnet written in C++.
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Executes dropped EXE 3 IoCs
pid Process 4708 crt.tmp 408 xulplayer32_64.exe 3516 xulplayer32_64.exe -
Loads dropped DLL 3 IoCs
pid Process 4708 crt.tmp 4708 crt.tmp 4708 crt.tmp -
Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
description ioc Destination IP 45.155.250.90 -
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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System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language xulplayer32_64.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language xulplayer32_64.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language crt.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language crt.tmp -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4708 crt.tmp 4708 crt.tmp -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4708 crt.tmp -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 1636 wrote to memory of 4708 1636 crt.exe 81 PID 1636 wrote to memory of 4708 1636 crt.exe 81 PID 1636 wrote to memory of 4708 1636 crt.exe 81 PID 4708 wrote to memory of 408 4708 crt.tmp 83 PID 4708 wrote to memory of 408 4708 crt.tmp 83 PID 4708 wrote to memory of 408 4708 crt.tmp 83 PID 4708 wrote to memory of 3516 4708 crt.tmp 84 PID 4708 wrote to memory of 3516 4708 crt.tmp 84 PID 4708 wrote to memory of 3516 4708 crt.tmp 84
Processes
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C:\Users\Admin\AppData\Local\Temp\crt.exe"C:\Users\Admin\AppData\Local\Temp\crt.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1636 -
C:\Users\Admin\AppData\Local\Temp\is-DIH57.tmp\crt.tmp"C:\Users\Admin\AppData\Local\Temp\is-DIH57.tmp\crt.tmp" /SL5="$500E0,3880008,54272,C:\Users\Admin\AppData\Local\Temp\crt.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:4708 -
C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe"C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe" -i3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:408
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C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe"C:\Users\Admin\AppData\Local\XULPlayer\xulplayer32_64.exe" -s3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:3516
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
692KB
MD500f15ee57af82fc40ac1ec609d1810a4
SHA16abfae4f73ade5af54d267c02389daf49abd6a51
SHA25620fea1e5fc629afb3a4f3aa818e7c00c66b692e2d6180c7ba64a246fd9d5d847
SHA512f9ab66c722b37cdb96f1a547a2c2d1c870b4966f27fee269bf65d47a506c2fcb0eab1ac168d0b4246ec336b23694d3c675d5be48f3338b79b76407c31cdad24c
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
13KB
MD5a813d18268affd4763dde940246dc7e5
SHA1c7366e1fd925c17cc6068001bd38eaef5b42852f
SHA256e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64
SHA512b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4
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Filesize
3.3MB
MD50ce21a5f4358ff7d673e423c229b6ef5
SHA14244e89af3f2aa98dd5ea6fd70d8704b29f9b1c5
SHA256950eb214c8aaa1aef01266126441cb55ab8216bf0989778f2f1973af02ead85b
SHA512af2665c210c9b0e11dc25cd4c05c4255e9f2195756bdb060e9ed3ea0065600114cdf09f165127bc9d52ee489b2eea2c52a67d8c0679eb9eb4e36fa359e467f95