Analysis
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max time kernel
149s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
06-02-2023 16:11
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220901-en
General
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Target
file.exe
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Size
320KB
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MD5
2a9f1a6f6f5102b53fbafbeca0ebc1a7
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SHA1
7e9d0eeaf3cba6b9fe49a7cde5fc60791b935bcf
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SHA256
5ab363da467713750238499b00e0acdbffd91ace0c10649cb17b4b244ae0ab3f
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SHA512
6ef2e9d0e2ca905371aee62be69e985ad6197313b64c775f152ea2c64911bdb19c5c3384faa3848327ed668c3fde29e30566cbce53b50da4751ad30a5577a923
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SSDEEP
3072:JGz4wiIL5Aw2R6E4jDAoBu15trOFR7wBjBP93gTW3YvjC1//+sxA7rztLzMsj:WNLywJE4q5tr+wabvjClRk9Ltj
Malware Config
Extracted
tofsee
svartalfheim.top
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\plnxsmt = "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\plnxsmt\ImagePath = "C:\\Windows\\SysWOW64\\plnxsmt\\qsvgbvkl.exe" svchost.exe -
Deletes itself 1 IoCs
Processes:
svchost.exepid process 1100 svchost.exe -
Executes dropped EXE 1 IoCs
Processes:
qsvgbvkl.exepid process 676 qsvgbvkl.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:
qsvgbvkl.exedescription pid process target process PID 676 set thread context of 1100 676 qsvgbvkl.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 336 sc.exe 1636 sc.exe 800 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 = 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 svchost.exe -
Suspicious use of WriteProcessMemory 30 IoCs
Processes:
file.exeqsvgbvkl.exedescription pid process target process PID 1368 wrote to memory of 940 1368 file.exe cmd.exe PID 1368 wrote to memory of 940 1368 file.exe cmd.exe PID 1368 wrote to memory of 940 1368 file.exe cmd.exe PID 1368 wrote to memory of 940 1368 file.exe cmd.exe PID 1368 wrote to memory of 392 1368 file.exe cmd.exe PID 1368 wrote to memory of 392 1368 file.exe cmd.exe PID 1368 wrote to memory of 392 1368 file.exe cmd.exe PID 1368 wrote to memory of 392 1368 file.exe cmd.exe PID 1368 wrote to memory of 336 1368 file.exe sc.exe PID 1368 wrote to memory of 336 1368 file.exe sc.exe PID 1368 wrote to memory of 336 1368 file.exe sc.exe PID 1368 wrote to memory of 336 1368 file.exe sc.exe PID 1368 wrote to memory of 1636 1368 file.exe sc.exe PID 1368 wrote to memory of 1636 1368 file.exe sc.exe PID 1368 wrote to memory of 1636 1368 file.exe sc.exe PID 1368 wrote to memory of 1636 1368 file.exe sc.exe PID 1368 wrote to memory of 800 1368 file.exe sc.exe PID 1368 wrote to memory of 800 1368 file.exe sc.exe PID 1368 wrote to memory of 800 1368 file.exe sc.exe PID 1368 wrote to memory of 800 1368 file.exe sc.exe PID 1368 wrote to memory of 1536 1368 file.exe netsh.exe PID 1368 wrote to memory of 1536 1368 file.exe netsh.exe PID 1368 wrote to memory of 1536 1368 file.exe netsh.exe PID 1368 wrote to memory of 1536 1368 file.exe netsh.exe PID 676 wrote to memory of 1100 676 qsvgbvkl.exe svchost.exe PID 676 wrote to memory of 1100 676 qsvgbvkl.exe svchost.exe PID 676 wrote to memory of 1100 676 qsvgbvkl.exe svchost.exe PID 676 wrote to memory of 1100 676 qsvgbvkl.exe svchost.exe PID 676 wrote to memory of 1100 676 qsvgbvkl.exe svchost.exe PID 676 wrote to memory of 1100 676 qsvgbvkl.exe svchost.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\plnxsmt\2⤵
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qsvgbvkl.exe" C:\Windows\SysWOW64\plnxsmt\2⤵
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" create plnxsmt binPath= "C:\Windows\SysWOW64\plnxsmt\qsvgbvkl.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 plnxsmt "wifi internet conection"2⤵
- Launches sc.exe
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" start plnxsmt2⤵
- 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\plnxsmt\qsvgbvkl.exeC:\Windows\SysWOW64\plnxsmt\qsvgbvkl.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\qsvgbvkl.exeFilesize
13.5MB
MD50746632f292315001aea39370324ac1c
SHA139773ae903850a019c1d866760791f1c2f752525
SHA25616c12ed1ffdff9082e507ef265be034e33f7e21bf256f8ac3a38f62a5d87b13c
SHA512228c1fe47927a917102bde0f6db306b6d06a2caad80e2ea7bd6e8ded84af804030667e586d1a352c621c05797d8ecf9a116045a72f79cdb51d75f842fe8336af
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C:\Windows\SysWOW64\plnxsmt\qsvgbvkl.exeFilesize
13.5MB
MD50746632f292315001aea39370324ac1c
SHA139773ae903850a019c1d866760791f1c2f752525
SHA25616c12ed1ffdff9082e507ef265be034e33f7e21bf256f8ac3a38f62a5d87b13c
SHA512228c1fe47927a917102bde0f6db306b6d06a2caad80e2ea7bd6e8ded84af804030667e586d1a352c621c05797d8ecf9a116045a72f79cdb51d75f842fe8336af
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memory/336-61-0x0000000000000000-mapping.dmp
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memory/392-59-0x0000000000000000-mapping.dmp
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memory/676-76-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/676-74-0x00000000008CC000-0x00000000008E1000-memory.dmpFilesize
84KB
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memory/800-63-0x0000000000000000-mapping.dmp
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memory/940-55-0x0000000000000000-mapping.dmp
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memory/1100-70-0x00000000000D0000-0x00000000000E5000-memory.dmpFilesize
84KB
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memory/1100-80-0x00000000000D0000-0x00000000000E5000-memory.dmpFilesize
84KB
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memory/1100-79-0x00000000000D0000-0x00000000000E5000-memory.dmpFilesize
84KB
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memory/1100-73-0x00000000000D9A6B-mapping.dmp
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memory/1100-72-0x00000000000D0000-0x00000000000E5000-memory.dmpFilesize
84KB
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memory/1368-66-0x00000000002AC000-0x00000000002C1000-memory.dmpFilesize
84KB
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memory/1368-67-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/1368-58-0x0000000000400000-0x000000000046C000-memory.dmpFilesize
432KB
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memory/1368-57-0x00000000001B0000-0x00000000001C3000-memory.dmpFilesize
76KB
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memory/1368-56-0x00000000002AC000-0x00000000002C1000-memory.dmpFilesize
84KB
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memory/1368-54-0x0000000074E41000-0x0000000074E43000-memory.dmpFilesize
8KB
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memory/1536-65-0x0000000000000000-mapping.dmp
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memory/1636-62-0x0000000000000000-mapping.dmp