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Analysis
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max time kernel
110s -
max time network
16s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
21/10/2024, 00:02
Static task
static1
Behavioral task
behavioral1
Sample
f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe
Resource
win10v2004-20241007-en
General
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Target
f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe
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Size
3.5MB
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MD5
3f8ad4fd18d8604f9b0ddcec3792b0e0
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SHA1
2d27ec1fd150d82b36199b2204d5333f4b905ace
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SHA256
f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397b
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SHA512
226d18f9941b8b1a32bc683f2418df159a2b33c88c83a89b4f9084852dab9ec042d50a2361e6bc3211edc3058c01df6d455f7c103051d077f9a6a4305ccc0efd
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SSDEEP
49152:91oKkLJU9nU2foKhA4vSWidGHp+NDGQUzbpDOfjxAkrL:joK3BDhtvS0Hpe4zbpaAKL
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2424 sysx32.exe -
Loads dropped DLL 2 IoCs
pid Process 628 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe 628 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\sys32 = "C:\\Windows\\system32\\sysx32.exe" f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe -
Enumerates connected drives 3 TTPs 2 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
description ioc Process File opened (read-only) \??\A: sysx32.exe File opened (read-only) \??\B: sysx32.exe -
Drops file in System32 directory 3 IoCs
description ioc Process File created C:\Windows\SysWOW64\sysx32.exe f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe File opened for modification C:\Windows\SysWOW64\sysx32.exe f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe File created C:\Windows\SysWOW64\sysx32.exe sysx32.exe -
Drops file in Program Files directory 2 IoCs
description ioc Process File created C:\Program Files\7-Zip\7z.exe.tmp sysx32.exe File opened for modification C:\Program Files\7-Zip\7z.exe.tmp sysx32.exe -
System Location Discovery: System Language Discovery 1 TTPs 1 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 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 628 wrote to memory of 2424 628 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe 28 PID 628 wrote to memory of 2424 628 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe 28 PID 628 wrote to memory of 2424 628 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe 28 PID 628 wrote to memory of 2424 628 f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe"C:\Users\Admin\AppData\Local\Temp\f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397bN.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:628 -
C:\Windows\SysWOW64\sysx32.exeC:\Windows\system32\sysx32.exe /scan2⤵
- Executes dropped EXE
- Enumerates connected drives
- Drops file in System32 directory
- Drops file in Program Files directory
PID:2424
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.5MB
MD53f8ad4fd18d8604f9b0ddcec3792b0e0
SHA12d27ec1fd150d82b36199b2204d5333f4b905ace
SHA256f5b0ec79fc755b366122d05be574d80ad05a494601cce12e234f03da3a3c397b
SHA512226d18f9941b8b1a32bc683f2418df159a2b33c88c83a89b4f9084852dab9ec042d50a2361e6bc3211edc3058c01df6d455f7c103051d077f9a6a4305ccc0efd