a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
29/05/2026, 06:37

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General

Target
a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
Size 2.7MB
Sample260529-hdvdmaes2j
SHA256 a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285
MD5 3c1a28821cef86ea25081f7b79c1f319
SHA1 4651b03780ff58bb13da0e85c04399fa7f3e5c7d
SHA512 33b73ea0bed326a9a6b8a86664ed561e837d14a9986e0d5a76a2736d3a9b0d2b9e9de1d2b27d8a0b5c379ad50d175a7158ba661ad6bbb6fe5f2e97a26e83175d
SSDEEP 49152:6qRlnAeRt48nRCMBfWqHe+6oWDCPVFre3OYY5i7Nk+4ors7fudWIVxr3iOb:6qRlnAeo8Fuq/eCPDrBi72+4+szud3V1
TLSH
T178D5E0E11D455A46D0BE827EA39CF7298D02261495139AE2B0F2CDE5771B3878E7338F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

7^/10

discovery installer

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe

Executes dropped EXE 2 IoCs

pid	Process
1884	sydyikudgf.exe
2348	sydyikudgf.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 created	C:\Program Files (x86)\MYPGNotes\is-6FKM6.tmp	sydyikudgf.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-JUE8B.tmp	sydyikudgf.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-UITHD.tmp	sydyikudgf.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-Q3V5V.tmp	sydyikudgf.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-01VTF.tmp	sydyikudgf.tmp
File opened for modification	C:\Program Files (x86)\MYPGNotes\AppleNote.exe	sydyikudgf.tmp
File opened for modification	C:\Program Files (x86)\MYPGNotes\Qt5Concurrent.dll	sydyikudgf.tmp
File created	C:\Program Files (x86)\MYPGNotes\unins000.dat	sydyikudgf.tmp
File created	C:\Program Files (x86)\MYPGNotes\is-JTPH0.tmp	sydyikudgf.tmp
File opened for modification	C:\Program Files (x86)\MYPGNotes\unins000.dat	sydyikudgf.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	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sydyikudgf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sydyikudgf.tmp

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

Inno Setup installer

installer

resource	yara_rule
behavioral1/files/0x000a00000002432c-7.dat	innosetup
behavioral1/memory/1884-10-0x0000000000400000-0x0000000000414000-memory.dmp	innosetup
behavioral1/memory/1884-43-0x0000000000400000-0x0000000000414000-memory.dmp	innosetup

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4320	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
4320	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
4320	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
4320	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
2348	sydyikudgf.tmp
2348	sydyikudgf.tmp

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2348	sydyikudgf.tmp

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4320 wrote to memory of 3596	4320	a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe	87
PID 3596 wrote to memory of 1884	3596	cmd.exe	89
PID 1884 wrote to memory of 2348	1884	sydyikudgf.exe	90

C:\Users\Admin\AppData\Local\Temp\a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe
"C:\Users\Admin\AppData\Local\Temp\a1b898b752884e8065586984e3df9beef639274e5cec658b173fe04e357e4285.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4320
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\sydyikudgf.exe" /VERYSILENT
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3596
- - C:\Users\Admin\AppData\Local\Temp\sydyikudgf.exe
    "C:\Users\Admin\AppData\Local\Temp\sydyikudgf.exe" /VERYSILENT
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1884
  - - C:\Users\Admin\AppData\Local\Temp\is-NMH20.tmp\sydyikudgf.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-NMH20.tmp\sydyikudgf.tmp" /SL5="$6011A,232785,54272,C:\Users\Admin\AppData\Local\Temp\sydyikudgf.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:2348

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

sydyikudgf.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-NMH20.tmp\sydyikudgf.tmp
Size 900KB
SHA256 e8730b0bf8f94cbb8babbfefb32cef8e8d19ec823f28c33a7d48c78589710762
MD5 f8b110dc2063d3b29502aa7042d26122
SHA1 1a0fd3db79eadc1ce714f6267d476ddbec0f5e79
SHA512 f3125d3f575aff68105ebb3eadbce30547d34e12237d8ebbc555c6fe12bcc0a5ea85a38e26f2900d70af70ec07efde3b8cd65dc0fdada637496531245ea5052f
SSDEEP 24576:dkHgKPNrPA37hzHIA6/oR36vln6sYEubnhRgZtnTZDExa/:d6frPA37hzHIA6/3UvjhRgZ9Te
TLSH
T122158C22F280C437C1B31A749E5786D5693BBE053E38A9DB7BF91F4C4E3964139262D2
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

sydyikudgf.exe

Path C:\Users\Admin\AppData\Local\Temp\sydyikudgf.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

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memory/1884-9-0x000000000040D000-0x000000000040E000-memory.dmp

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memory/1884-10-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/1884-43-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/2348-16-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2348-17-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/2348-42-0x0000000000400000-0x00000000004F4000-memory.dmp

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memory/4320-0-0x0000000000EC0000-0x000000000116D000-memory.dmp

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memory/4320-2-0x0000000010000000-0x0000000010298000-memory.dmp

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