ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
11/11/2024, 01:54

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General

Target
ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe
Size 158KB
Sample241111-cb2r2azgmf
SHA256 ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822
MD5 b7997d0e52087582c8930f5f2d4c98ea
SHA1 df796bc29aa03f8599364bfe7b422899baf97618
SHA512 322b49a1d3ce90907c07edc0396bb66998f8516db66df865c840bd76c09d4fd28417ceee73e918263d9fa9eb363ee57739781e0759e3124afcdb731630573f55
SSDEEP 3072:oZpYg19EeiLLmjempGuCYooEK1JWaCItULG3rt2Wcora4dI:OPjEl6jLiQ1JW+Oy3p/
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x0002000000022ab7-12.dat	acprotect

Deletes itself 1 IoCs

pid	Process
1804	gvkmu.exe

Executes dropped EXE 2 IoCs

pid	Process
1804	gvkmu.exe
4668	yalvkix.exe

Loads dropped DLL 1 IoCs

pid	Process
4668	yalvkix.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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Linycpy = "c:\\Program Files\\pjijcigw\\yalvkix.exe \"c:\\Program Files\\pjijcigw\\yalvkix.dll\",SetHandle"	yalvkix.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)	\??\j:	yalvkix.exe
File opened (read-only)	\??\k:	yalvkix.exe
File opened (read-only)	\??\q:	yalvkix.exe
File opened (read-only)	\??\r:	yalvkix.exe
File opened (read-only)	\??\w:	yalvkix.exe
File opened (read-only)	\??\x:	yalvkix.exe
File opened (read-only)	\??\a:	yalvkix.exe
File opened (read-only)	\??\n:	yalvkix.exe
File opened (read-only)	\??\p:	yalvkix.exe
File opened (read-only)	\??\s:	yalvkix.exe
File opened (read-only)	\??\v:	yalvkix.exe
File opened (read-only)	\??\e:	yalvkix.exe
File opened (read-only)	\??\g:	yalvkix.exe
File opened (read-only)	\??\i:	yalvkix.exe
File opened (read-only)	\??\l:	yalvkix.exe
File opened (read-only)	\??\y:	yalvkix.exe
File opened (read-only)	\??\z:	yalvkix.exe
File opened (read-only)	\??\b:	yalvkix.exe
File opened (read-only)	\??\h:	yalvkix.exe
File opened (read-only)	\??\m:	yalvkix.exe
File opened (read-only)	\??\o:	yalvkix.exe
File opened (read-only)	\??\t:	yalvkix.exe
File opened (read-only)	\??\u:	yalvkix.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	yalvkix.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File opened for modification	\??\c:\Program Files\pjijcigw	gvkmu.exe
File created	\??\c:\Program Files\pjijcigw\yalvkix.dll	gvkmu.exe
File created	\??\c:\Program Files\pjijcigw\yalvkix.exe	gvkmu.exe
File opened for modification	\??\c:\Program Files\pjijcigw\yalvkix.exe	gvkmu.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	ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	gvkmu.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	yalvkix.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
3600	cmd.exe
4316	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	yalvkix.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	yalvkix.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4316	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4668	yalvkix.exe
4668	yalvkix.exe
4668	yalvkix.exe
4668	yalvkix.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4668	yalvkix.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
448	ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe
1804	gvkmu.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 448 wrote to memory of 3600	448	ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe	84
PID 448 wrote to memory of 3600	448	ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe	84
PID 448 wrote to memory of 3600	448	ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe	84
PID 3600 wrote to memory of 4316	3600	cmd.exe	86
PID 3600 wrote to memory of 4316	3600	cmd.exe	86
PID 3600 wrote to memory of 4316	3600	cmd.exe	86
PID 3600 wrote to memory of 1804	3600	cmd.exe	89
PID 3600 wrote to memory of 1804	3600	cmd.exe	89
PID 3600 wrote to memory of 1804	3600	cmd.exe	89
PID 1804 wrote to memory of 4668	1804	gvkmu.exe	90
PID 1804 wrote to memory of 4668	1804	gvkmu.exe	90
PID 1804 wrote to memory of 4668	1804	gvkmu.exe	90

C:\Users\Admin\AppData\Local\Temp\ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe
"C:\Users\Admin\AppData\Local\Temp\ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:448
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\gvkmu.exe "C:\Users\Admin\AppData\Local\Temp\ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3600
- - 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:4316
- - C:\Users\Admin\AppData\Local\Temp\gvkmu.exe
    C:\Users\Admin\AppData\Local\Temp\\gvkmu.exe "C:\Users\Admin\AppData\Local\Temp\ed700563b05c014bc7d24dacc76bb2b8553098c8da06dfcc16f63dea47768822.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:1804
  - - \??\c:\Program Files\pjijcigw\yalvkix.exe
      "c:\Program Files\pjijcigw\yalvkix.exe" "c:\Program Files\pjijcigw\yalvkix.dll",SetHandle C:\Users\Admin\AppData\Local\Temp\gvkmu.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:4668

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

yalvkix.exe

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

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gvkmu.exe

Path C:\Users\Admin\AppData\Local\Temp\gvkmu.exe
Size 158KB
SHA256 caef874366a7ea5a564dfa17150bbf235877727362558b6258d9cf250dab595f
MD5 062d64f6388a00758c4371bb62ff0bf3
SHA1 8c82a57cb1b9a9a9d9c9c49f80ec2d1f24fe9b65
SHA512 7567efa291f629e341dbfc301f6b00aabe71ce13db3b74e0a4c543ff7197c0c14f7124e2440cbedee079a21fdc6e3714a4ae6d661dd8c355d010ac8c20866f8e
SSDEEP 3072:oZpYg19EeiLLmjempGuCYooEK1JWaCItULG3rt2Wcora4dIO:OPjEl6jLiQ1JW+Oy3p/1
MD5 SHA1 SHA512 SSDEEP

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yalvkix.dll

Path \??\c:\Program Files\pjijcigw\yalvkix.dll
Size 128KB
SHA256 82ffc25c99477c1dd60325c87ffb3cfd78bf390aae4a07f50f690d4b09544a96
MD5 f0eaaaeec5dbd291dd208dbd08fd5eb3
SHA1 858920b65cc4a4a7c52ca0fb8c592ab7c2f28342
SHA512 8ef666f57743ecf5fcde209d8fc63da68e648186e076c7815acde1c8e25a35645ce4c77ebafc814bb1e753f370491f436f37f04e7b32955fcff11150d9055345
SSDEEP 3072:pE+8OKVuMxgMLQ813qgy0ExYhnMzJkt0lDMKPb:18NcMxdLQ81amJMF7eKj
MD5 SHA1 SHA512 SSDEEP

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memory/448-0-0x0000000000400000-0x000000000042F036-memory.dmp

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memory/448-2-0x0000000000400000-0x000000000042F036-memory.dmp

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memory/1804-11-0x0000000000400000-0x000000000042F036-memory.dmp

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memory/4668-15-0x0000000010000000-0x0000000010048000-memory.dmp

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memory/4668-16-0x0000000010000000-0x0000000010048000-memory.dmp

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memory/4668-18-0x0000000010000000-0x0000000010048000-memory.dmp

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memory/4668-21-0x0000000010000000-0x0000000010048000-memory.dmp

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