49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9

Analysis

max time kernel
119s
max time network
122s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
09/11/2024, 01:07

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General

Target
49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe
Size 242KB
Sample241109-bg4cdatfna
SHA256 49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9
MD5 00f9598bc9daa33ab641f75a21cf2800
SHA1 61c64e107b05979b28ba04b686b288fe6d550fea
SHA512 ea1c2bc65e1184dc205d84b468cf05b0b2d0cce2194683dec82be7e008ddbfc5d2af70b534eb475bfc157843c36c7cbd693d7f59182dece896f2f0e780519c9f
SSDEEP 6144:cK+/nRMYrp2wrPHRYz9fa3/Y1R6vNLdYoCM:+RMczHRipaQrpM
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Deletes itself 1 IoCs

pid	Process
4128	yuyyf.exe

Executes dropped EXE 2 IoCs

pid	Process
4128	yuyyf.exe
1716	xxh.exe

Loads dropped DLL 1 IoCs

pid	Process
1716	xxh.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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\gc = "c:\\Program Files\\wybxn\\xxh.exe \"c:\\Program Files\\wybxn\\xxhsf.dll\",GetColor"	xxh.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)	\??\l:	xxh.exe
File opened (read-only)	\??\n:	xxh.exe
File opened (read-only)	\??\q:	xxh.exe
File opened (read-only)	\??\u:	xxh.exe
File opened (read-only)	\??\z:	xxh.exe
File opened (read-only)	\??\a:	xxh.exe
File opened (read-only)	\??\h:	xxh.exe
File opened (read-only)	\??\i:	xxh.exe
File opened (read-only)	\??\j:	xxh.exe
File opened (read-only)	\??\v:	xxh.exe
File opened (read-only)	\??\b:	xxh.exe
File opened (read-only)	\??\o:	xxh.exe
File opened (read-only)	\??\s:	xxh.exe
File opened (read-only)	\??\w:	xxh.exe
File opened (read-only)	\??\y:	xxh.exe
File opened (read-only)	\??\k:	xxh.exe
File opened (read-only)	\??\g:	xxh.exe
File opened (read-only)	\??\m:	xxh.exe
File opened (read-only)	\??\p:	xxh.exe
File opened (read-only)	\??\r:	xxh.exe
File opened (read-only)	\??\t:	xxh.exe
File opened (read-only)	\??\x:	xxh.exe
File opened (read-only)	\??\e:	xxh.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	xxh.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\wybxn\xxh.exe	yuyyf.exe
File opened for modification	\??\c:\Program Files\wybxn	yuyyf.exe
File created	\??\c:\Program Files\wybxn\xxhsf.dll	yuyyf.exe
File created	\??\c:\Program Files\wybxn\xxh.exe	yuyyf.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	yuyyf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xxh.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
760	cmd.exe
4464	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	xxh.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	xxh.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4464	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1716	xxh.exe
1716	xxh.exe
1716	xxh.exe
1716	xxh.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1716	xxh.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4764	49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe
4128	yuyyf.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4764 wrote to memory of 760	4764	49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe	86
PID 4764 wrote to memory of 760	4764	49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe	86
PID 4764 wrote to memory of 760	4764	49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe	86
PID 760 wrote to memory of 4464	760	cmd.exe	88
PID 760 wrote to memory of 4464	760	cmd.exe	88
PID 760 wrote to memory of 4464	760	cmd.exe	88
PID 760 wrote to memory of 4128	760	cmd.exe	90
PID 760 wrote to memory of 4128	760	cmd.exe	90
PID 760 wrote to memory of 4128	760	cmd.exe	90
PID 4128 wrote to memory of 1716	4128	yuyyf.exe	91
PID 4128 wrote to memory of 1716	4128	yuyyf.exe	91
PID 4128 wrote to memory of 1716	4128	yuyyf.exe	91

C:\Users\Admin\AppData\Local\Temp\49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe
"C:\Users\Admin\AppData\Local\Temp\49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4764
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\yuyyf.exe "C:\Users\Admin\AppData\Local\Temp\49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:760
- - 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:4464
- - C:\Users\Admin\AppData\Local\Temp\yuyyf.exe
    C:\Users\Admin\AppData\Local\Temp\\yuyyf.exe "C:\Users\Admin\AppData\Local\Temp\49c630ee78792eccad6039f79737b8692acc22130da9cd60feeee9eeaf6b94c9N.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:4128
  - - \??\c:\Program Files\wybxn\xxh.exe
      "c:\Program Files\wybxn\xxh.exe" "c:\Program Files\wybxn\xxhsf.dll",GetColor C:\Users\Admin\AppData\Local\Temp\yuyyf.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:1716

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

xxh.exe

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

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yuyyf.exe

Path C:\Users\Admin\AppData\Local\Temp\yuyyf.exe
Size 242KB
SHA256 e9155df8dc1666cdbc19e4162830b94796ab192eb7464430beea9b08e4b721f7
MD5 b3c1234e76da85b75df5d5f7a820120e
SHA1 b573970768db9f347400e7b7dec795d6b20c668b
SHA512 ab6920d933aec1f4c811b4ff748637f6e0ffc330833e9013a23b5d162c3b1033def29e58a3ff1d96505dc0973c75e98d1478fcf832507ed68e3da992c1605ab4
SSDEEP 6144:cK+/nRMYrp2wrPHRYz9fa3/Y1R6vNLdYoC6:+RMczHRipaQrp6
MD5 SHA1 SHA512 SSDEEP

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xxhsf.dll

Path \??\c:\Program Files\wybxn\xxhsf.dll
Size 171KB
SHA256 ede3fb828249e7d2ac458663973ec373b63636a48906d3c31108c363ebc38c28
MD5 fc99025ef976047f4865b6480c7e4f79
SHA1 ea00f03b610a24a6d3018d93028a729b4c938cbf
SHA512 75af3a93bd51df8251ba70377bf8816bfa92616d2796c344f5a5b3a293da0a79837554fa79e5dfe29bd01bc24bc93cef8290ead2c0d86d47009e519d83275c28
SSDEEP 3072:sCx969mf1oCBEyUmY8Hb6smCDpDjL0dbKKHwYLWekmRaMBQoVqy8j2GEctsMYDCt:sCzn9BVUmFH5hpDiqY/LHVl8yhxJg5
MD5 SHA1 SHA512 SSDEEP

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memory/1716-17-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1716-16-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1716-15-0x0000000001060000-0x0000000001062000-memory.dmp

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memory/1716-14-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1716-18-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1716-19-0x0000000001060000-0x0000000001062000-memory.dmp

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memory/1716-21-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/1716-23-0x0000000010000000-0x000000001004E000-memory.dmp

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memory/4128-10-0x0000000000400000-0x00000000004845DD-memory.dmp

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memory/4764-2-0x0000000000400000-0x00000000004845DD-memory.dmp

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memory/4764-0-0x0000000000400000-0x00000000004845DD-memory.dmp

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