Analysis
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max time kernel
149s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240508-en -
resource tags
arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system -
submitted
11-06-2024 15:33
Static task
static1
Behavioral task
behavioral1
Sample
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe
Resource
win10v2004-20240508-en
General
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Target
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe
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Size
407KB
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MD5
2701aca13e64655f8e63d894b0bb53f4
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SHA1
2efd3f99b5ac3bcfe1915513b5549dc04bac854f
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SHA256
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b
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SHA512
62f9b9677a11984f6089bf567d2e15fe57cc4cc061b16cfff2be2e93eaa5acd93aef2e26e4a648eff53e99161d29d2aa0522452d92b86ed834d724112c522ed4
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SSDEEP
6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4u:gtRfJcNYFNm8UhlZGseu
Malware Config
Signatures
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Blocklisted process makes network request 10 IoCs
Processes:
rundll32.exeflow pid process 3 2660 rundll32.exe 5 2660 rundll32.exe 8 2660 rundll32.exe 9 2660 rundll32.exe 10 2660 rundll32.exe 11 2660 rundll32.exe 12 2660 rundll32.exe 13 2660 rundll32.exe 15 2660 rundll32.exe 16 2660 rundll32.exe -
Deletes itself 1 IoCs
Processes:
rvrpy.exepid process 2132 rvrpy.exe -
Executes dropped EXE 1 IoCs
Processes:
rvrpy.exepid process 2132 rvrpy.exe -
Loads dropped DLL 6 IoCs
Processes:
cmd.exerundll32.exepid process 2204 cmd.exe 2204 cmd.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
rundll32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\suokosf\\pwkump.dll\",Verify" rundll32.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
rundll32.exedescription ioc process File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\y: rundll32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
rundll32.exedescription ioc process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
rundll32.exepid process 2660 rundll32.exe -
Drops file in Program Files directory 2 IoCs
Processes:
rvrpy.exedescription ioc process File created \??\c:\Program Files\suokosf\pwkump.dll rvrpy.exe File opened for modification \??\c:\Program Files\suokosf rvrpy.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
rundll32.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
rundll32.exepid process 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe 2660 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 2660 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exervrpy.exepid process 2268 c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe 2132 rvrpy.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.execmd.exervrpy.exedescription pid process target process PID 2268 wrote to memory of 2204 2268 c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe cmd.exe PID 2268 wrote to memory of 2204 2268 c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe cmd.exe PID 2268 wrote to memory of 2204 2268 c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe cmd.exe PID 2268 wrote to memory of 2204 2268 c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe cmd.exe PID 2204 wrote to memory of 2220 2204 cmd.exe PING.EXE PID 2204 wrote to memory of 2220 2204 cmd.exe PING.EXE PID 2204 wrote to memory of 2220 2204 cmd.exe PING.EXE PID 2204 wrote to memory of 2220 2204 cmd.exe PING.EXE PID 2204 wrote to memory of 2132 2204 cmd.exe rvrpy.exe PID 2204 wrote to memory of 2132 2204 cmd.exe rvrpy.exe PID 2204 wrote to memory of 2132 2204 cmd.exe rvrpy.exe PID 2204 wrote to memory of 2132 2204 cmd.exe rvrpy.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe PID 2132 wrote to memory of 2660 2132 rvrpy.exe rundll32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2268 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rvrpy.exe "C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2204 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:2220 -
C:\Users\Admin\AppData\Local\Temp\rvrpy.exeC:\Users\Admin\AppData\Local\Temp\\rvrpy.exe "C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2132 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\suokosf\pwkump.dll",Verify C:\Users\Admin\AppData\Local\Temp\rvrpy.exe4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2660
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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Filesize
228KB
MD59858ab4844a6547f7aca1733096be9ed
SHA1a4f32181a212c09a6bc44e2a6d6f27cc489f4f75
SHA256f4b32b38592b0b2de79378e165cebdcfae567365a44edd6c90803634ad095a22
SHA512a10da986c104308f789c91da5e5f89b70b448b7893ad7ce9b378e5c7d22fd3e23aed23528bdc4fcf56fd7b1494353e86ec56d8d5bc3dadad887b5d23db7cad06
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Filesize
407KB
MD588f195539b47b92fa635a851e1d388ae
SHA13a1022fc35a0fba1f10880b584574f395c4498ee
SHA25607c75089343963b3f20fd8a3527abd8d0c71e621f8c3e6f3ee96e6ea479ca0e4
SHA51236508fa8dcbd5ff75236b8894223962e53a8299fcd0d57edf251115cb69692c976b1c0dd75fc9394d579f9b8bf856126928c77d16c1e999ee27ae77beaff3b3d