Analysis
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max time kernel
150s -
max time network
144s -
platform
windows7_x64 -
resource
win7-20230220-en -
resource tags
arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system -
submitted
17-04-2023 11:49
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20230220-en
General
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Target
file.exe
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Size
212KB
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MD5
a28432f1ae1231aa338ca25bb76bca43
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SHA1
71f949d29951d3dc188e7553caaec487a114a88f
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SHA256
edb6dd6f22989b7d58e3cd4a941cb7bae8c12371f59d9623bad1c6201e75ad72
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SHA512
bafc90498131959718497031e8fd72ca6d458d82d28b1a8924984caf33ab1d09eb8d48c7f01019335b3ac7b348d71a562229cf4c8f193889eccee8b3fe820227
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SSDEEP
3072:19CDeqA5IRiybXzQy3HD5/062XLV/6bZXoVbFRdLa7222WV65tPcCcqI7iMOre:7ksIRld3D106s3VHdm0PcCcN7iMA
Malware Config
Extracted
tofsee
vanaheim.cn
jotunheim.name
Signatures
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Processes:
svchost.exedescription ioc process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\mqhacsol = "0" svchost.exe -
Creates new service(s) 1 TTPs
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Modifies Windows Firewall 1 TTPs 1 IoCs
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Sets service image path in registry 2 TTPs 1 IoCs
Processes:
svchost.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\mqhacsol\ImagePath = "C:\\Windows\\SysWOW64\\mqhacsol\\vyvofhbr.exe" svchost.exe -
Deletes itself 1 IoCs
Processes:
svchost.exepid process 384 svchost.exe -
Executes dropped EXE 1 IoCs
Processes:
vyvofhbr.exepid process 1764 vyvofhbr.exe -
Drops file in System32 directory 1 IoCs
Processes:
svchost.exedescription ioc process File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
vyvofhbr.exedescription pid process target process PID 1764 set thread context of 384 1764 vyvofhbr.exe svchost.exe -
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.
Processes:
sc.exesc.exesc.exepid process 684 sc.exe 580 sc.exe 1700 sc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies data under HKEY_USERS 2 IoCs
Processes:
svchost.exedescription ioc process Key created \REGISTRY\USER\.DEFAULT\Control Panel\Buses svchost.exe Set value (data) \REGISTRY\USER\.DEFAULT\Control Panel\Buses\Config0 = 3cc8153ddbe3230124edb47d450dd49d084297dce82e72baa49e3bfdec795b1dfe23f9ca80cd945d24edb47d470dd49d024195daf71261adc06d04fda6e22673bbc9154961cda56811d8814d7c34e1a8644490bdbc7e25ed965f0cc4fd8d3c74bbc4103d29fca66812df854f7d3ae59d084295d9e13f4bb4c06d00fdadfd542cdc9f400b35f4a26412edc70f3252a0f40948f48fb47a27ea945c05c5f48d387287cc186270a4f93824dc81487138e4a55d18cdbd606d1ddd7b4383a1c48d541de5ad743d73a2e6367b9ec60b440dd49d642df4bdf3279dcbe16d34fdc48e980fe7ad743d05f5a47312db9a4a7123e6a8502df4bd844d14dda46d34fdc48d541de4ad743d04cd945d24edb47d440dd49d642df4bd844d14dda46d34fdc48d541de4ad743d042e955d24 svchost.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
file.exevyvofhbr.exedescription pid process target process PID 1736 wrote to memory of 2036 1736 file.exe cmd.exe PID 1736 wrote to memory of 2036 1736 file.exe cmd.exe PID 1736 wrote to memory of 2036 1736 file.exe cmd.exe PID 1736 wrote to memory of 2036 1736 file.exe cmd.exe PID 1736 wrote to memory of 1940 1736 file.exe cmd.exe PID 1736 wrote to memory of 1940 1736 file.exe cmd.exe PID 1736 wrote to memory of 1940 1736 file.exe cmd.exe PID 1736 wrote to memory of 1940 1736 file.exe cmd.exe PID 1736 wrote to memory of 684 1736 file.exe sc.exe PID 1736 wrote to memory of 684 1736 file.exe sc.exe PID 1736 wrote to memory of 684 1736 file.exe sc.exe PID 1736 wrote to memory of 684 1736 file.exe sc.exe PID 1736 wrote to memory of 580 1736 file.exe sc.exe PID 1736 wrote to memory of 580 1736 file.exe sc.exe PID 1736 wrote to memory of 580 1736 file.exe sc.exe PID 1736 wrote to memory of 580 1736 file.exe sc.exe PID 1736 wrote to memory of 1700 1736 file.exe sc.exe PID 1736 wrote to memory of 1700 1736 file.exe sc.exe PID 1736 wrote to memory of 1700 1736 file.exe sc.exe PID 1736 wrote to memory of 1700 1736 file.exe sc.exe PID 1764 wrote to memory of 384 1764 vyvofhbr.exe svchost.exe PID 1764 wrote to memory of 384 1764 vyvofhbr.exe svchost.exe PID 1764 wrote to memory of 384 1764 vyvofhbr.exe svchost.exe PID 1764 wrote to memory of 384 1764 vyvofhbr.exe svchost.exe PID 1764 wrote to memory of 384 1764 vyvofhbr.exe svchost.exe PID 1764 wrote to memory of 384 1764 vyvofhbr.exe svchost.exe PID 1736 wrote to memory of 1536 1736 file.exe netsh.exe PID 1736 wrote to memory of 1536 1736 file.exe netsh.exe PID 1736 wrote to memory of 1536 1736 file.exe netsh.exe PID 1736 wrote to memory of 1536 1736 file.exe netsh.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mqhacsol\2⤵
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vyvofhbr.exe" C:\Windows\SysWOW64\mqhacsol\2⤵
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" create mqhacsol binPath= "C:\Windows\SysWOW64\mqhacsol\vyvofhbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" description mqhacsol "wifi internet conection"2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" start mqhacsol2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\netsh.exe"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul2⤵
- Modifies Windows Firewall
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C:\Windows\SysWOW64\mqhacsol\vyvofhbr.exeC:\Windows\SysWOW64\mqhacsol\vyvofhbr.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\svchost.exesvchost.exe2⤵
- Windows security bypass
- Sets service image path in registry
- Deletes itself
- Drops file in System32 directory
- Modifies data under HKEY_USERS
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\vyvofhbr.exeFilesize
10.6MB
MD5d98bfb2267a5182aedf292ac23309c45
SHA14bc23f3413cc0f987ffc41ebd71cf0ada08e8c7c
SHA256f887daa9ab1cf5673c592a1c7c80893daab94ac39d093c07bb12f4e6932806b7
SHA512d1b64ca8e104c107c1f7c51b9d1dc5e3de481a6343dd6668a4330f0f8e9d258684b51979ddf80ab4dc1f8f0440c6b9686d255e7b84c091582732e87c9a88b4be
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C:\Windows\SysWOW64\mqhacsol\vyvofhbr.exeFilesize
10.6MB
MD5d98bfb2267a5182aedf292ac23309c45
SHA14bc23f3413cc0f987ffc41ebd71cf0ada08e8c7c
SHA256f887daa9ab1cf5673c592a1c7c80893daab94ac39d093c07bb12f4e6932806b7
SHA512d1b64ca8e104c107c1f7c51b9d1dc5e3de481a6343dd6668a4330f0f8e9d258684b51979ddf80ab4dc1f8f0440c6b9686d255e7b84c091582732e87c9a88b4be
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memory/384-60-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/384-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmpFilesize
4KB
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memory/384-62-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/384-67-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/384-68-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/384-69-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/384-71-0x0000000000080000-0x0000000000095000-memory.dmpFilesize
84KB
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memory/1736-56-0x00000000003B0000-0x00000000003C3000-memory.dmpFilesize
76KB
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memory/1736-66-0x0000000000400000-0x00000000004A2000-memory.dmpFilesize
648KB
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memory/1764-64-0x0000000000400000-0x00000000004A2000-memory.dmpFilesize
648KB