1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512

Analysis

max time kernel
149s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
29/05/2026, 09:10

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General

Target
1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
Size 2.7MB
Sample260529-k442vsf151
SHA256 1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512
MD5 83ccab672ed44279704ff9303e27da49
SHA1 8252541f9ec1a75f623c335a3e62c4ce22a4c2ef
SHA512 59a1fd42c44561c623fad6e67ce9430afd738ef365405138d7060b1082cb3259feffea42e2630e462f0865374a73d06b68bd8b6b00b2c445bfaf4bda4870091f
SSDEEP 49152:RXQbPeifhPN5aIj/6NFbFcE6Dy3l9ekzOM9DgAltd8qpWBUe5TM:KHpPNYwSXFwy3RcWd8qpWBUe5
TLSH
T1BAD5CF3DFC508C73E29AB8F4A40659DCE53D00F5DAA540E60A75B7E91CBE7452C2B82B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

discovery installer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3744	mdfskvfhou.exe
2496	mdfskvfhou.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 10 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\MYPGNotes\AppleNote.exe	mdfskvfhou.tmp
File opened for modification	C:\Program Files (x86)\MYPGNotes\Qt5Concurrent.dll	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-RAL63.tmp	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-T7UJS.tmp	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-GH06R.tmp	mdfskvfhou.tmp
File opened for modification	C:\Program Files (x86)\MYPGNotes\unins000.dat	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\unins000.dat	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-CUE0B.tmp	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-DMORR.tmp	mdfskvfhou.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-QCFK4.tmp	mdfskvfhou.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mdfskvfhou.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mdfskvfhou.tmp

Inno Setup is an open-source installation builder for Windows applications. 3 IoCs

Inno Setup installer

installer

resource	yara_rule
behavioral2/files/0x000d00000002af1f-7.dat	innosetup
behavioral2/memory/3744-10-0x0000000000400000-0x0000000000414000-memory.dmp	innosetup
behavioral2/memory/3744-43-0x0000000000400000-0x0000000000414000-memory.dmp	innosetup

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
8	1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
8	1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
8	1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
8	1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
2496	mdfskvfhou.tmp
2496	mdfskvfhou.tmp

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2496	mdfskvfhou.tmp

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 72	8	1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe	79
PID 72 wrote to memory of 3744	72	cmd.exe	81
PID 3744 wrote to memory of 2496	3744	mdfskvfhou.exe	82

C:\Users\Admin\AppData\Local\Temp\1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe
"C:\Users\Admin\AppData\Local\Temp\1f4028af2ab139aca8d7b1a5d937698f61309912e346770e6c3e8bb8182d1512.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:8
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\mdfskvfhou.exe" /VERYSILENT
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:72
- - C:\Users\Admin\AppData\Local\Temp\mdfskvfhou.exe
    "C:\Users\Admin\AppData\Local\Temp\mdfskvfhou.exe" /VERYSILENT
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3744
  - - C:\Users\Admin\AppData\Local\Temp\is-DE29M.tmp\mdfskvfhou.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-DE29M.tmp\mdfskvfhou.tmp" /SL5="$70244,232785,54272,C:\Users\Admin\AppData\Local\Temp\mdfskvfhou.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      Drops file in Program Files directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of FindShellTrayWindow
      PID:2496

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

mdfskvfhou.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-DE29M.tmp\mdfskvfhou.tmp
Size 900KB
SHA256 e8730b0bf8f94cbb8babbfefb32cef8e8d19ec823f28c33a7d48c78589710762
MD5 f8b110dc2063d3b29502aa7042d26122
SHA1 1a0fd3db79eadc1ce714f6267d476ddbec0f5e79
SHA512 f3125d3f575aff68105ebb3eadbce30547d34e12237d8ebbc555c6fe12bcc0a5ea85a38e26f2900d70af70ec07efde3b8cd65dc0fdada637496531245ea5052f
SSDEEP 24576:dkHgKPNrPA37hzHIA6/oR36vln6sYEubnhRgZtnTZDExa/:d6frPA37hzHIA6/3UvjhRgZ9Te
TLSH
T122158C22F280C437C1B31A749E5786D5693BBE053E38A9DB7BF91F4C4E3964139262D2
MD5 SHA1 SHA512 SSDEEP TLSH

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mdfskvfhou.exe

Path C:\Users\Admin\AppData\Local\Temp\mdfskvfhou.exe
Size 526KB
SHA256 e0634bc21490c472b233aaec047438feae557f0d57ea5b78b3b48260916e2b4e
MD5 9beea33ea128fd25ad509ae7ff7bcff3
SHA1 3a87a124b47d68bf8eb1d1a4f9695fb2b2a52660
SHA512 292996177bbb804ea3f6ad51fdb74707f1a1a35d50d8ae7b082d88cbb476bae1a883133c9e1dc4cefce78bc71f8d65276e5cdaeeef03088bc54beb41269dc5b3
SSDEEP 12288:7ybLWvbUj+sC0VISzFot5t/PDwUwfpdvNLo61fFBy91OU:7y38UjrWJtzRwrho61/u
TLSH
T1B7B42383B6D098B8E87285702DA5C145AD733D156C38B02976EDAE6D9F331B1EA0F347
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/8-0-0x00000000006D0000-0x000000000097D000-memory.dmp

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memory/8-1-0x0000000010000000-0x0000000010297000-memory.dmp

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memory/2496-16-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2496-17-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2496-42-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/3744-9-0x000000000040D000-0x000000000040E000-memory.dmp

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memory/3744-10-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3744-43-0x0000000000400000-0x0000000000414000-memory.dmp

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