530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390

Analysis

max time kernel
118s
max time network
120s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20/01/2025, 17:15

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General

Target
530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe
Size 205KB
Sample250120-vsvddsznhl
SHA256 530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390
MD5 b48d5f443eda99395fdd6098600759ee
SHA1 cc5a7ac54000e37c7083bc0ab019bfa3cfa18601
SHA512 356142040ed40d948875f9790e92a69b3fe04f6114f185fba88db5dccdaceb9f51630e873aeb86c0f50bdce2e2d3b7d527e0691b1d23c5baa6cab77920fbf994
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTn:X2vnSwjaOcADw9cUeCOfR
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
3080	fytjuhv.exe

Executes dropped EXE 2 IoCs

pid	Process
3080	fytjuhv.exe
3568	ytsjmst.exe

Loads dropped DLL 1 IoCs

pid	Process
3568	ytsjmst.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\auuaqpyjd\\ytsjmst.exe \"c:\\Program Files\\auuaqpyjd\\ytsjmst.dll\",Compliance"	ytsjmst.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\u:	ytsjmst.exe
File opened (read-only)	\??\h:	ytsjmst.exe
File opened (read-only)	\??\i:	ytsjmst.exe
File opened (read-only)	\??\l:	ytsjmst.exe
File opened (read-only)	\??\n:	ytsjmst.exe
File opened (read-only)	\??\r:	ytsjmst.exe
File opened (read-only)	\??\s:	ytsjmst.exe
File opened (read-only)	\??\t:	ytsjmst.exe
File opened (read-only)	\??\x:	ytsjmst.exe
File opened (read-only)	\??\q:	ytsjmst.exe
File opened (read-only)	\??\y:	ytsjmst.exe
File opened (read-only)	\??\z:	ytsjmst.exe
File opened (read-only)	\??\e:	ytsjmst.exe
File opened (read-only)	\??\g:	ytsjmst.exe
File opened (read-only)	\??\k:	ytsjmst.exe
File opened (read-only)	\??\m:	ytsjmst.exe
File opened (read-only)	\??\w:	ytsjmst.exe
File opened (read-only)	\??\a:	ytsjmst.exe
File opened (read-only)	\??\b:	ytsjmst.exe
File opened (read-only)	\??\j:	ytsjmst.exe
File opened (read-only)	\??\o:	ytsjmst.exe
File opened (read-only)	\??\p:	ytsjmst.exe
File opened (read-only)	\??\v:	ytsjmst.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.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	ytsjmst.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\auuaqpyjd	fytjuhv.exe
File created	\??\c:\Program Files\auuaqpyjd\ytsjmst.dll	fytjuhv.exe
File created	\??\c:\Program Files\auuaqpyjd\ytsjmst.exe	fytjuhv.exe
File opened for modification	\??\c:\Program Files\auuaqpyjd\ytsjmst.exe	fytjuhv.exe

System Location Discovery: System Language Discovery 1 TTPs 5 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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fytjuhv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ytsjmst.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1688	cmd.exe
1064	PING.EXE

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	ytsjmst.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	ytsjmst.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1064	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3568	ytsjmst.exe
3568	ytsjmst.exe
3568	ytsjmst.exe
3568	ytsjmst.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3568	ytsjmst.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
632	530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe
3080	fytjuhv.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 632 wrote to memory of 1688	632	530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe	83
PID 632 wrote to memory of 1688	632	530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe	83
PID 632 wrote to memory of 1688	632	530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe	83
PID 1688 wrote to memory of 1064	1688	cmd.exe	85
PID 1688 wrote to memory of 1064	1688	cmd.exe	85
PID 1688 wrote to memory of 1064	1688	cmd.exe	85
PID 1688 wrote to memory of 3080	1688	cmd.exe	86
PID 1688 wrote to memory of 3080	1688	cmd.exe	86
PID 1688 wrote to memory of 3080	1688	cmd.exe	86
PID 3080 wrote to memory of 3568	3080	fytjuhv.exe	87
PID 3080 wrote to memory of 3568	3080	fytjuhv.exe	87
PID 3080 wrote to memory of 3568	3080	fytjuhv.exe	87

C:\Users\Admin\AppData\Local\Temp\530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe
"C:\Users\Admin\AppData\Local\Temp\530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:632
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\fytjuhv.exe "C:\Users\Admin\AppData\Local\Temp\530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1688
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1064
- - C:\Users\Admin\AppData\Local\Temp\fytjuhv.exe
    C:\Users\Admin\AppData\Local\Temp\\fytjuhv.exe "C:\Users\Admin\AppData\Local\Temp\530f8926ee6d2395fed541bab79d4011f43a73d40f76995245d34abbeb149390.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3080
  - - \??\c:\Program Files\auuaqpyjd\ytsjmst.exe
      "c:\Program Files\auuaqpyjd\ytsjmst.exe" "c:\Program Files\auuaqpyjd\ytsjmst.dll",Compliance C:\Users\Admin\AppData\Local\Temp\fytjuhv.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Enumerates connected drives
      Writes to the Master Boot Record (MBR)
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

ytsjmst.exe

Path C:\Program Files\auuaqpyjd\ytsjmst.exe
Size 60KB
SHA256 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910
MD5 889b99c52a60dd49227c5e485a016679
SHA1 8fa889e456aa646a4d0a4349977430ce5fa5e2d7
SHA512 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641
SSDEEP 1536:H9ykYCTdiHQKrFXmw2RQln5IUmDjoX6+:HlMHprF2nRQln5I
MD5 SHA1 SHA512 SSDEEP

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fytjuhv.exe

Path C:\Users\Admin\AppData\Local\Temp\fytjuhv.exe
Size 205KB
SHA256 bfd3ad60d6d5043ea33972f43b23414bd83826f1c17a78990f1652fa526e47c6
MD5 e1bb0c161498494478096acf28a3ac79
SHA1 c1d59a30212cbd1412e4c440d47dad8930830057
SHA512 5410b6c9661ceac9d70cff487faf2352c83f59156f40548654b2557ed4fb21bcdef575164052896cba0c01f8ae980485e764c8d4fc07d11900275ce8fa056bf9
SSDEEP 3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkT:X2vnSwjaOcADw9cUeCOf
MD5 SHA1 SHA512 SSDEEP

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ytsjmst.dll

Path \??\c:\Program Files\auuaqpyjd\ytsjmst.dll
Size 141KB
SHA256 0e3bd1cd588d80e4d3f207388544bafb89bbb100062e548a12f49798d17418b4
MD5 362da46d668e7aca89b26907e7bf25ce
SHA1 b5fc9e2640c18c2b4ec89bfa2815c5b22962b38d
SHA512 092c10486e96093fe965f0e267b26c93669998bc409de599cdbbb7d4b3ed652a917b063a7aa53654ec17731b9f7949f3686905315b584030488c9fbea251a3a8
SSDEEP 3072:RGmRmNJToTJfp2D1QzpSyiJEkGSPf1bc4l6K:RGMmfToTJY6zpSyvkGSn1tl6K
MD5 SHA1 SHA512 SSDEEP

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memory/632-4-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/632-0-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/632-2-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/632-1-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3080-9-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3080-8-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3080-15-0x0000000000400000-0x000000000044901D-memory.dmp

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memory/3568-19-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3568-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/3568-25-0x0000000010000000-0x000000001004E000-memory.dmp

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