4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcd

General

Target

4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe
Size

94KB
MD5

be902c159fa8bac40075a736b25f9f40
SHA1

4f966a3fe56e298cb0cbff455d60c694eb829920
SHA256

4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcd
SHA512

91ab75657077a0c77e939724d881b1b303fbfb20eebcd4230bde8b7adeed93ba986366367eaa412cf29388a672b7a04c4cc987cc39bdcae75090cc4984d9cae2
SSDEEP

1536:8gDktLw4rO10tMrlk3SJDlf98jqP+8il3CxOeZIckWlmyp7m:uLRrO10TiJD9yjqrilyxOuPpC

Score

8^/10

bootkit discovery persistence spyware stealer

Malware Config

Signatures

Blocklisted process makes network request 3 IoCs

flow	pid	Process
17	3244	rundll32.exe
18	3244	rundll32.exe
21	3244	rundll32.exe

Deletes itself 1 IoCs

pid	Process
1376	vlvlb.exe

Executes dropped EXE 1 IoCs

pid	Process
1376	vlvlb.exe

Loads dropped DLL 1 IoCs

pid	Process
3244	rundll32.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-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\sahxzvmon\\rspkxzi.dll\",QueryPluginInterface"	rundll32.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)	\??\h:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\a:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\r:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\y:	rundll32.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	rundll32.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	4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.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	vlvlb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.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
3708	cmd.exe
244	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	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
244	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3244	rundll32.exe
3244	rundll32.exe
3244	rundll32.exe
3244	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3244	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2880	4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe
1376	vlvlb.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2880 wrote to memory of 3708	2880	4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe	82
PID 2880 wrote to memory of 3708	2880	4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe	82
PID 2880 wrote to memory of 3708	2880	4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe	82
PID 3708 wrote to memory of 244	3708	cmd.exe	84
PID 3708 wrote to memory of 244	3708	cmd.exe	84
PID 3708 wrote to memory of 244	3708	cmd.exe	84
PID 3708 wrote to memory of 1376	3708	cmd.exe	85
PID 3708 wrote to memory of 1376	3708	cmd.exe	85
PID 3708 wrote to memory of 1376	3708	cmd.exe	85
PID 1376 wrote to memory of 3244	1376	vlvlb.exe	86
PID 1376 wrote to memory of 3244	1376	vlvlb.exe	86
PID 1376 wrote to memory of 3244	1376	vlvlb.exe	86

C:\Users\Admin\AppData\Local\Temp\4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe
"C:\Users\Admin\AppData\Local\Temp\4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2880
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\vlvlb.exe "C:\Users\Admin\AppData\Local\Temp\4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3708
- - 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:244
- - C:\Users\Admin\AppData\Local\Temp\vlvlb.exe
    C:\Users\Admin\AppData\Local\Temp\\vlvlb.exe "C:\Users\Admin\AppData\Local\Temp\4bdd3e8000a0ad5b462e470d262d83bf6c338391ec4f8722166f7c7668bfcbcdN.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1376
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\sahxzvmon\rspkxzi.dll",QueryPluginInterface C:\Users\Admin\AppData\Local\Temp\vlvlb.exe
      4⤵
      Blocklisted process makes network request
      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:3244

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Peripheral Device Discovery

Query Registry

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\vlvlb.exe

Filesize
94KB

MD5
7f2b66ba2aaef9fcce4fc5bccad90cf8

SHA1
55cafd7a556d0f4efde03a1349b9f9d498adf7dc

SHA256
9fb946a44753cdf9a505934ef59388f802a88eb95ecd3e827fe93d2fd905da88

SHA512
b43b71290bb96ee274850b0f64176a5b50d0b48bf37b4aa0811cf3f8a20665b48c37457c6fb5ad25909fa96f15901ad2d71dd91bcbd8a72d549ae1d4ea0a7de6

Download Submit
\??\c:\sahxzvmon\rspkxzi.dll

Filesize
44KB

MD5
0f12a7d509b2c9bb9b4cd6d8a0325e86

SHA1
f5fb59ad4f0633d115b06f35a2dc161dc4367157

SHA256
9111c1eb1f0b59dcd49cfd5a0abc0ba100ac59a3bcae8623ff091dfdc46fed3c

SHA512
e3c84a643ff0a2627daba8a056221985a472aaf07bade61b3e9459db4bfc8792c1347606911e3fcc01581508004b18b5435bcccd5e7617cc6d091f37a5f42e7f

Download Submit
memory/1376-7-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2880-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2880-2-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3244-10-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download
memory/3244-11-0x00000000005F0000-0x00000000005F2000-memory.dmp

Filesize
8KB

Download
memory/3244-13-0x00000000005F0000-0x00000000005F2000-memory.dmp

Filesize
8KB

Download
memory/3244-12-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download
memory/3244-16-0x0000000010000000-0x0000000010023000-memory.dmp

Filesize
140KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads