c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab

Analysis

max time kernel
150s
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
07/11/2024, 04:04

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General

Target
c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe
Size 104KB
Sample241107-em2yaavfrb
SHA256 c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab
MD5 1f0f6e9fab60b095a2b59344d74f64d5
SHA1 18b89eede024a6ac1434721b09df8975f3dcbc91
SHA512 fb00a4614a58996169f411e6bacc00adb24f28ba1f4e4c60df1910f46be5c242755f764a67cee56aa02617c13c337599691be671c75ba9d12590300ba6725456
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pa:xl6XYeel6GGGVOw
MD5 SHA1 SHA512 SSDEEP

Score

8^/10

bootkit discovery persistence spyware stealer upx

Malware Config

Signatures

Blocklisted process makes network request 8 IoCs

flow	pid	Process
14	508	rundll32.exe
20	508	rundll32.exe
21	508	rundll32.exe
22	508	rundll32.exe
35	508	rundll32.exe
36	508	rundll32.exe
40	508	rundll32.exe
46	508	rundll32.exe

ACProtect 1.3x - 1.4x DLL software 1 IoCs

Detects file using ACProtect software.

resource	yara_rule
behavioral2/files/0x000d000000023a6b-8.dat	acprotect

Deletes itself 1 IoCs

pid	Process
3352	iozrz.exe

Executes dropped EXE 1 IoCs

pid	Process
3352	iozrz.exe

Loads dropped DLL 1 IoCs

pid	Process
508	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\exefk\\vjupi.dll\",init"	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)	\??\a:	rundll32.exe
File opened (read-only)	\??\j:	rundll32.exe
File opened (read-only)	\??\p:	rundll32.exe
File opened (read-only)	\??\s:	rundll32.exe
File opened (read-only)	\??\w:	rundll32.exe
File opened (read-only)	\??\b:	rundll32.exe
File opened (read-only)	\??\h:	rundll32.exe
File opened (read-only)	\??\i:	rundll32.exe
File opened (read-only)	\??\n:	rundll32.exe
File opened (read-only)	\??\u:	rundll32.exe
File opened (read-only)	\??\e:	rundll32.exe
File opened (read-only)	\??\l:	rundll32.exe
File opened (read-only)	\??\q:	rundll32.exe
File opened (read-only)	\??\z:	rundll32.exe
File opened (read-only)	\??\t:	rundll32.exe
File opened (read-only)	\??\v:	rundll32.exe
File opened (read-only)	\??\x:	rundll32.exe
File opened (read-only)	\??\g:	rundll32.exe
File opened (read-only)	\??\k:	rundll32.exe
File opened (read-only)	\??\m:	rundll32.exe
File opened (read-only)	\??\o:	rundll32.exe
File opened (read-only)	\??\r:	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

UPX packed file 7 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000d000000023a6b-8.dat	upx
behavioral2/memory/508-10-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/508-11-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/508-13-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/508-14-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/508-15-0x0000000010000000-0x0000000010024000-memory.dmp	upx
behavioral2/memory/508-16-0x0000000010000000-0x0000000010024000-memory.dmp	upx

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	iozrz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.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
1352	cmd.exe
4012	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4012	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
508	rundll32.exe
508	rundll32.exe
508	rundll32.exe
508	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	508	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1476	c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe
3352	iozrz.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 1352	1476	c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe	83
PID 1476 wrote to memory of 1352	1476	c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe	83
PID 1476 wrote to memory of 1352	1476	c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe	83
PID 1352 wrote to memory of 4012	1352	cmd.exe	86
PID 1352 wrote to memory of 4012	1352	cmd.exe	86
PID 1352 wrote to memory of 4012	1352	cmd.exe	86
PID 1352 wrote to memory of 3352	1352	cmd.exe	89
PID 1352 wrote to memory of 3352	1352	cmd.exe	89
PID 1352 wrote to memory of 3352	1352	cmd.exe	89
PID 3352 wrote to memory of 508	3352	iozrz.exe	90
PID 3352 wrote to memory of 508	3352	iozrz.exe	90
PID 3352 wrote to memory of 508	3352	iozrz.exe	90

C:\Users\Admin\AppData\Local\Temp\c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe
"C:\Users\Admin\AppData\Local\Temp\c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1476
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\iozrz.exe "C:\Users\Admin\AppData\Local\Temp\c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1352
- - 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:4012
- - \??\c:\iozrz.exe
    c:\iozrz.exe "C:\Users\Admin\AppData\Local\Temp\c2c1fd430c030f2362dccf91836477f76e0e6a7956847f4cbd765e7adc8674ab.exe"
    3⤵
    - Deletes itself
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3352
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\exefk\vjupi.dll",init c:\iozrz.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:508

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

iozrz.exe

Path C:\iozrz.exe
Size 105KB
SHA256 5c6fe07e26c46bb6cd30491aff673385fd4d18b5ca668569892660e075fee519
MD5 154e1f70515fb5ad4dea570566bdee5c
SHA1 b5c9ad5d8ff398ee857ea0d2080be0c2ec7b2f79
SHA512 dfd4e6637505f6a001956cf9a27b97dfe1e4a5284e41e746fec86feca225a9f202c40ada571d30b1f85ff08d72556b19747d89f45c61df5ea8a3c3b585edee52
SSDEEP 3072:xK4RNx6nb4RoIw/XBSeral6oaE0HGnvXuEOrc0pX:xl6XYeel6GGGVON
MD5 SHA1 SHA512 SSDEEP

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vjupi.dll

Path \??\c:\exefk\vjupi.dll
Size 46KB
SHA256 b6bc7902da0250f6ca920b35b222f6a0fe62102caf05d2a1722c4d3b225a0a9e
MD5 42fe886bcb6460f7c2a46e21ecac5da6
SHA1 7d9a1c9fe17121cf61444da965f29e974a95ede2
SHA512 3d1a7dc1d9ca8a4376302ba20df584ad59b98e0d3b18b06b22d7f5a455833ce124e412fc1922a3b704dcbafa31987cda3115c9a71dd6299683502cebae33567c
SSDEEP 768:P60NIyOvlPSGxZ00FBsMT0fdB5h3vU7ExCClpoduUglNgLoR/C:P6e4lP5rvz1Vd8H/C
MD5 SHA1 SHA512 SSDEEP

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memory/508-10-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/508-11-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/508-13-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/508-14-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/508-15-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/508-16-0x0000000010000000-0x0000000010024000-memory.dmp

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memory/1476-0-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/1476-2-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/3352-7-0x0000000000400000-0x0000000000417000-memory.dmp

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