Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
07/05/2024, 04:15
Static task
static1
Behavioral task
behavioral1
Sample
33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe
Resource
win10v2004-20240419-en
General
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Target
33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe
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Size
406KB
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MD5
6261b4321aed3ecd2f700ed37c64843c
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SHA1
7eeeb49a06410ef6df0e361d3dc5a43ee10492ad
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SHA256
33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c
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SHA512
7971ae6bcb18466564be65196691aa62f8bc7fbd071e954749640bc29d4d127383291d9ce1f130865d8bb978e88a1ed130c57416364a7c8de774db2eeb0298d3
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SSDEEP
6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse
Malware Config
Signatures
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Blocklisted process makes network request 8 IoCs
flow pid Process 27 628 rundll32.exe 34 628 rundll32.exe 35 628 rundll32.exe 36 628 rundll32.exe 50 628 rundll32.exe 51 628 rundll32.exe 63 628 rundll32.exe 79 628 rundll32.exe -
Deletes itself 1 IoCs
pid Process 1580 pkmwl.exe -
Executes dropped EXE 1 IoCs
pid Process 1580 pkmwl.exe -
Loads dropped DLL 1 IoCs
pid Process 628 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
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3411335054-1982420046-2118495756-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\sukhfwhyg\\cntfown.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.
description ioc Process File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\e: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\s: 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.
description ioc Process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
pid Process 628 rundll32.exe -
Drops file in Program Files directory 2 IoCs
description ioc Process File opened for modification \??\c:\Program Files\sukhfwhyg pkmwl.exe File created \??\c:\Program Files\sukhfwhyg\cntfown.dll pkmwl.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 4072 PING.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe 628 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 628 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
pid Process 1380 33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe 1580 pkmwl.exe -
Suspicious use of WriteProcessMemory 12 IoCs
description pid Process procid_target PID 1380 wrote to memory of 3608 1380 33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe 84 PID 1380 wrote to memory of 3608 1380 33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe 84 PID 1380 wrote to memory of 3608 1380 33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe 84 PID 3608 wrote to memory of 4072 3608 cmd.exe 86 PID 3608 wrote to memory of 4072 3608 cmd.exe 86 PID 3608 wrote to memory of 4072 3608 cmd.exe 86 PID 3608 wrote to memory of 1580 3608 cmd.exe 90 PID 3608 wrote to memory of 1580 3608 cmd.exe 90 PID 3608 wrote to memory of 1580 3608 cmd.exe 90 PID 1580 wrote to memory of 628 1580 pkmwl.exe 91 PID 1580 wrote to memory of 628 1580 pkmwl.exe 91 PID 1580 wrote to memory of 628 1580 pkmwl.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1380 -
C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pkmwl.exe "C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"2⤵
- Suspicious use of WriteProcessMemory
PID:3608 -
C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
PID:4072
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C:\Users\Admin\AppData\Local\Temp\pkmwl.exeC:\Users\Admin\AppData\Local\Temp\\pkmwl.exe "C:\Users\Admin\AppData\Local\Temp\33c2e83deecb9631716c249016ba7a460398af74260648a5b434ec0ea2cb793c.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1580 -
\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\sukhfwhyg\cntfown.dll",Verify C:\Users\Admin\AppData\Local\Temp\pkmwl.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:628
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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
406KB
MD5a5f043831778fff9a638e37b91824e44
SHA1dfb026a58e4ac634b8de85081bbf1405c5e3c807
SHA256ac16e8d1eaa5a1ba31e97138afcfdaee15322c864c1f3cf6a3d618000d4b84e7
SHA51230af14630e1646baf7255b56f95ea0efe8b281adb8b3676bb59fc2b3e25d965843f6d7d80e4c42ee82382b5c39fc6d7643a091578629c6dce69c67a943957a1a
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Filesize
228KB
MD5a61490acdaa060686ae2833e59b5c967
SHA1707d66059e03dfde4dd09f5253be5ad9aecf9fc4
SHA2567d438461f5e4b724c63d344bf176a4024ae674fab0d1a0d2a79f222193184e8c
SHA5122e27130dab6cdfa9bf962e64a67769cd024e805f7bd2d1ef9e0f0661e1a0664f7cff58ca3d9d431c77b52a5217419c0d0fcb23773f1218c2e4016425bcc87f29