Analysis
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max time kernel
146s -
max time network
151s -
platform
windows7_x64 -
resource
win7-20231020-en -
resource tags
arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system -
submitted
06/11/2023, 01:11
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20231020-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20231023-en
General
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Target
file.exe
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Size
221KB
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MD5
2488d90434caafc7d576e6e16220a772
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SHA1
9f72377d8cc4e561ae6172460df94b8d0f87ed9e
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SHA256
f784390bef1610437897b0044be3a495e58de9cef5de77d9f45f5b3a5defe5fe
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SHA512
5ee948f1eeb8ba21cda44d781b616f96957b6f7a1951b0a4dfe6c7c881ae28d243722cf751209efa8e1e274fe392b0956ea1423ec6ed1efb7880b87e44aa5e18
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SSDEEP
3072:WHMfCYL/+qeVAeW5XNFJarDAJ98I2a9CZo2Y07LPd0RPGnllVP:WsfbLQIF00JWla92o2Y0foGnR
Malware Config
Extracted
tofsee
vanaheim.cn
jotunheim.name
Signatures
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description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\SysWOW64\gxyayzff = "0" svchost.exe -
Creates new service(s) 1 TTPs
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Modifies Windows Firewall 1 TTPs 1 IoCs
pid Process 2932 netsh.exe -
Sets service image path in registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\gxyayzff\ImagePath = "C:\\Windows\\SysWOW64\\gxyayzff\\cowtzmsq.exe" svchost.exe -
Deletes itself 1 IoCs
pid Process 2604 svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2820 cowtzmsq.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File created C:\Windows\SysWOW64\config\systemprofile:.repos svchost.exe -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2820 set thread context of 2604 2820 cowtzmsq.exe 41 -
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.
pid Process 2700 sc.exe 2764 sc.exe 2708 sc.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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GoLang User-Agent 1 IoCs
Uses default user-agent string defined by GoLang HTTP packages.
description flow ioc HTTP User-Agent header 58 Go-http-client/1.1 -
Modifies data under HKEY_USERS 2 IoCs
description 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
description pid Process procid_target PID 2924 wrote to memory of 1176 2924 file.exe 28 PID 2924 wrote to memory of 1176 2924 file.exe 28 PID 2924 wrote to memory of 1176 2924 file.exe 28 PID 2924 wrote to memory of 1176 2924 file.exe 28 PID 2924 wrote to memory of 2244 2924 file.exe 30 PID 2924 wrote to memory of 2244 2924 file.exe 30 PID 2924 wrote to memory of 2244 2924 file.exe 30 PID 2924 wrote to memory of 2244 2924 file.exe 30 PID 2924 wrote to memory of 2700 2924 file.exe 32 PID 2924 wrote to memory of 2700 2924 file.exe 32 PID 2924 wrote to memory of 2700 2924 file.exe 32 PID 2924 wrote to memory of 2700 2924 file.exe 32 PID 2924 wrote to memory of 2764 2924 file.exe 34 PID 2924 wrote to memory of 2764 2924 file.exe 34 PID 2924 wrote to memory of 2764 2924 file.exe 34 PID 2924 wrote to memory of 2764 2924 file.exe 34 PID 2924 wrote to memory of 2708 2924 file.exe 36 PID 2924 wrote to memory of 2708 2924 file.exe 36 PID 2924 wrote to memory of 2708 2924 file.exe 36 PID 2924 wrote to memory of 2708 2924 file.exe 36 PID 2924 wrote to memory of 2932 2924 file.exe 38 PID 2924 wrote to memory of 2932 2924 file.exe 38 PID 2924 wrote to memory of 2932 2924 file.exe 38 PID 2924 wrote to memory of 2932 2924 file.exe 38 PID 2820 wrote to memory of 2604 2820 cowtzmsq.exe 41 PID 2820 wrote to memory of 2604 2820 cowtzmsq.exe 41 PID 2820 wrote to memory of 2604 2820 cowtzmsq.exe 41 PID 2820 wrote to memory of 2604 2820 cowtzmsq.exe 41 PID 2820 wrote to memory of 2604 2820 cowtzmsq.exe 41 PID 2820 wrote to memory of 2604 2820 cowtzmsq.exe 41
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
PID:2924 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gxyayzff\2⤵PID:1176
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cowtzmsq.exe" C:\Windows\SysWOW64\gxyayzff\2⤵PID:2244
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" create gxyayzff binPath= "C:\Windows\SysWOW64\gxyayzff\cowtzmsq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"2⤵
- Launches sc.exe
PID:2700
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" description gxyayzff "wifi internet conection"2⤵
- Launches sc.exe
PID:2764
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C:\Windows\SysWOW64\sc.exe"C:\Windows\System32\sc.exe" start gxyayzff2⤵
- Launches sc.exe
PID:2708
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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
PID:2932
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C:\Windows\SysWOW64\gxyayzff\cowtzmsq.exeC:\Windows\SysWOW64\gxyayzff\cowtzmsq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2820 -
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
PID:2604
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
2Windows Service
2Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
12.9MB
MD5077ec0f2746f3e3aa0b8b2bfdd6deab3
SHA1fd94f087ef88663cfd2d66952b834c62567312f6
SHA256ea50118b7c16cc462069c92d972687faa7dbb9a242f849fb8a162e33c18929c0
SHA51244efbfd6b362f973d9250b445c269e24fee13f4d1bf7d4ae16be4066c17581aa30494ccee3e5b200e2d25dc99eaf8e6880c9541380a4bb5daacb35d5a2300796
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Filesize
12.9MB
MD5077ec0f2746f3e3aa0b8b2bfdd6deab3
SHA1fd94f087ef88663cfd2d66952b834c62567312f6
SHA256ea50118b7c16cc462069c92d972687faa7dbb9a242f849fb8a162e33c18929c0
SHA51244efbfd6b362f973d9250b445c269e24fee13f4d1bf7d4ae16be4066c17581aa30494ccee3e5b200e2d25dc99eaf8e6880c9541380a4bb5daacb35d5a2300796