4f8d7a281594177b09abe8d9fdb7eab00c6d19466313486323222c6b22007e25

Analysis

max time kernel
147s
max time network
144s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 08:13

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General

Target

131ed0b98ee2c1933efdad3de1b51aeb.exe
Size

600KB
MD5

131ed0b98ee2c1933efdad3de1b51aeb
SHA1

fcd38692f17e9435ed45ff833fb36d153edb7cc8
SHA256

4f8d7a281594177b09abe8d9fdb7eab00c6d19466313486323222c6b22007e25
SHA512

2dcaa624f8734e1c9c5061937c926196d04d39ed636a71c09ab80768cff28e0440e678f0e904dd876d484683410acd5da7cdb808fd689eebfda08c331fc335bc
SSDEEP

6144:rd5VDNwVBSS7Id4w5wLIoKhPBLXYpE4WfUnEkx6k1C14b2y:LVTScd48wUhhXYupu6k1CO

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 8 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	reg.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	reg.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Local\Temp\vbc.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\vbc.exe:*:Enabled:Windows Messanger"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	reg.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Admin\AppData\Roaming\UpdateBS.exe = "C:\\Users\\Admin\\AppData\\Roaming\\UpdateBS.exe:*:Enabled:Windows Messanger"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0"	reg.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	reg.exe

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	vbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\winufgjf = "C:\\Users\\Admin\\AppData\\Roaming\\UpdateBS.exe"	vbc.exe

Executes dropped EXE 1 IoCs

pid	Process
2352	vbc.exe

Loads dropped DLL 1 IoCs

pid	Process
2908	131ed0b98ee2c1933efdad3de1b51aeb.exe

UPX packed file 15 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2352-11-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-12-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-15-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-20-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-21-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-22-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-39-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-41-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-46-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-47-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-50-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-53-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-54-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-55-0x0000000000400000-0x0000000000473000-memory.dmp	upx
behavioral1/memory/2352-58-0x0000000000400000-0x0000000000473000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3427588347-1492276948-3422228430-1000\Software\Microsoft\Windows\CurrentVersion\Run\winufgjf = "C:\\Users\\Admin\\AppData\\Roaming\\UpdateBS.exe"	vbc.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\winufgjf = "C:\\Users\\Admin\\AppData\\Roaming\\UpdateBS.exe"	vbc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2908 set thread context of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28

Modifies registry key 1 TTPs 4 IoCs

Modify Registry

T1112

pid	Process
2632	reg.exe
2588	reg.exe
2604	reg.exe
2648	reg.exe

Suspicious use of AdjustPrivilegeToken 36 IoCs

description	pid	Process
Token: 1	2352	vbc.exe
Token: SeCreateTokenPrivilege	2352	vbc.exe
Token: SeAssignPrimaryTokenPrivilege	2352	vbc.exe
Token: SeLockMemoryPrivilege	2352	vbc.exe
Token: SeIncreaseQuotaPrivilege	2352	vbc.exe
Token: SeMachineAccountPrivilege	2352	vbc.exe
Token: SeTcbPrivilege	2352	vbc.exe
Token: SeSecurityPrivilege	2352	vbc.exe
Token: SeTakeOwnershipPrivilege	2352	vbc.exe
Token: SeLoadDriverPrivilege	2352	vbc.exe
Token: SeSystemProfilePrivilege	2352	vbc.exe
Token: SeSystemtimePrivilege	2352	vbc.exe
Token: SeProfSingleProcessPrivilege	2352	vbc.exe
Token: SeIncBasePriorityPrivilege	2352	vbc.exe
Token: SeCreatePagefilePrivilege	2352	vbc.exe
Token: SeCreatePermanentPrivilege	2352	vbc.exe
Token: SeBackupPrivilege	2352	vbc.exe
Token: SeRestorePrivilege	2352	vbc.exe
Token: SeShutdownPrivilege	2352	vbc.exe
Token: SeDebugPrivilege	2352	vbc.exe
Token: SeAuditPrivilege	2352	vbc.exe
Token: SeSystemEnvironmentPrivilege	2352	vbc.exe
Token: SeChangeNotifyPrivilege	2352	vbc.exe
Token: SeRemoteShutdownPrivilege	2352	vbc.exe
Token: SeUndockPrivilege	2352	vbc.exe
Token: SeSyncAgentPrivilege	2352	vbc.exe
Token: SeEnableDelegationPrivilege	2352	vbc.exe
Token: SeManageVolumePrivilege	2352	vbc.exe
Token: SeImpersonatePrivilege	2352	vbc.exe
Token: SeCreateGlobalPrivilege	2352	vbc.exe
Token: 31	2352	vbc.exe
Token: 32	2352	vbc.exe
Token: 33	2352	vbc.exe
Token: 34	2352	vbc.exe
Token: 35	2352	vbc.exe
Token: SeDebugPrivilege	2352	vbc.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2352	vbc.exe
2352	vbc.exe
2352	vbc.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2908 wrote to memory of 2352	2908	131ed0b98ee2c1933efdad3de1b51aeb.exe	28
PID 2352 wrote to memory of 2864	2352	vbc.exe	29
PID 2352 wrote to memory of 2864	2352	vbc.exe	29
PID 2352 wrote to memory of 2864	2352	vbc.exe	29
PID 2352 wrote to memory of 2864	2352	vbc.exe	29
PID 2352 wrote to memory of 2732	2352	vbc.exe	36
PID 2352 wrote to memory of 2732	2352	vbc.exe	36
PID 2352 wrote to memory of 2732	2352	vbc.exe	36
PID 2352 wrote to memory of 2732	2352	vbc.exe	36
PID 2352 wrote to memory of 2100	2352	vbc.exe	30
PID 2352 wrote to memory of 2100	2352	vbc.exe	30
PID 2352 wrote to memory of 2100	2352	vbc.exe	30
PID 2352 wrote to memory of 2100	2352	vbc.exe	30
PID 2352 wrote to memory of 2868	2352	vbc.exe	35
PID 2352 wrote to memory of 2868	2352	vbc.exe	35
PID 2352 wrote to memory of 2868	2352	vbc.exe	35
PID 2352 wrote to memory of 2868	2352	vbc.exe	35
PID 2100 wrote to memory of 2604	2100	cmd.exe	39
PID 2100 wrote to memory of 2604	2100	cmd.exe	39
PID 2100 wrote to memory of 2604	2100	cmd.exe	39
PID 2100 wrote to memory of 2604	2100	cmd.exe	39
PID 2868 wrote to memory of 2588	2868	cmd.exe	38
PID 2868 wrote to memory of 2588	2868	cmd.exe	38
PID 2868 wrote to memory of 2588	2868	cmd.exe	38
PID 2868 wrote to memory of 2588	2868	cmd.exe	38
PID 2864 wrote to memory of 2632	2864	cmd.exe	37
PID 2864 wrote to memory of 2632	2864	cmd.exe	37
PID 2864 wrote to memory of 2632	2864	cmd.exe	37
PID 2864 wrote to memory of 2632	2864	cmd.exe	37
PID 2732 wrote to memory of 2648	2732	cmd.exe	40
PID 2732 wrote to memory of 2648	2732	cmd.exe	40
PID 2732 wrote to memory of 2648	2732	cmd.exe	40
PID 2732 wrote to memory of 2648	2732	cmd.exe	40

C:\Users\Admin\AppData\Local\Temp\131ed0b98ee2c1933efdad3de1b51aeb.exe
"C:\Users\Admin\AppData\Local\Temp\131ed0b98ee2c1933efdad3de1b51aeb.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Users\Admin\AppData\Local\Temp\vbc.exe
  C:\Users\Admin\AppData\Local\Temp\vbc.exe
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2352
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2864
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      4⤵
      Modifies firewall policy service
      Modifies registry key
      PID:2632
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2100
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
      4⤵
      Modifies firewall policy service
      Modifies registry key
      PID:2604
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\UpdateBS.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\UpdateBS.exe:*:Enabled:Windows Messanger" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2868
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Roaming\UpdateBS.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\UpdateBS.exe:*:Enabled:Windows Messanger" /f
      4⤵
      Modifies firewall policy service
      Modifies registry key
      PID:2588
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\vbc.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\vbc.exe:*:Enabled:Windows Messanger" /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2732
  - - C:\Windows\SysWOW64\reg.exe
      REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "C:\Users\Admin\AppData\Local\Temp\vbc.exe" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\vbc.exe:*:Enabled:Windows Messanger" /f
      4⤵
      Modifies firewall policy service
      Modifies registry key
      PID:2648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\vbc.exe

Filesize
1.1MB

MD5
34aa912defa18c2c129f1e09d75c1d7e

SHA1
9c3046324657505a30ecd9b1fdb46c05bde7d470

SHA256
6df94b7fa33f1b87142adc39b3db0613fc520d9e7a5fd6a5301dd7f51f8d0386

SHA512
d1ea9368f5d7166180612fd763c87afb647d088498887961f5e7fb0a10f4a808bd5928e8a3666d70ff794093c51ecca8816f75dd47652fd4eb23dce7f9aa1f98

Download Submit
memory/2352-30-0x00000000024B0000-0x00000000024C2000-memory.dmp

Filesize
72KB

Download
memory/2352-35-0x0000000002870000-0x00000000028AC000-memory.dmp

Filesize
240KB

Download
memory/2352-58-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-9-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-11-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-12-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2352-15-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-18-0x0000000000020000-0x0000000000021000-memory.dmp

Filesize
4KB

Download
memory/2352-20-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-21-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-22-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-24-0x0000000000480000-0x00000000004DF000-memory.dmp

Filesize
380KB

Download
memory/2352-26-0x00000000003D0000-0x00000000003E3000-memory.dmp

Filesize
76KB

Download
memory/2352-29-0x0000000002480000-0x00000000024A1000-memory.dmp

Filesize
132KB

Download
memory/2352-55-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-54-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-32-0x0000000075760000-0x0000000075870000-memory.dmp

Filesize
1.1MB

Download
memory/2352-31-0x00000000024D0000-0x00000000024FA000-memory.dmp

Filesize
168KB

Download
memory/2352-37-0x0000000075DF0000-0x0000000075E90000-memory.dmp

Filesize
640KB

Download
memory/2352-38-0x0000000077201000-0x0000000077202000-memory.dmp

Filesize
4KB

Download
memory/2352-39-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-53-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-50-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-41-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-43-0x0000000075760000-0x0000000075870000-memory.dmp

Filesize
1.1MB

Download
memory/2352-46-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2352-47-0x0000000000400000-0x0000000000473000-memory.dmp

Filesize
460KB

Download
memory/2908-42-0x0000000002050000-0x0000000002090000-memory.dmp

Filesize
256KB

Download
memory/2908-40-0x00000000741B0000-0x000000007475B000-memory.dmp

Filesize
5.7MB

Download
memory/2908-2-0x0000000002050000-0x0000000002090000-memory.dmp

Filesize
256KB

Download
memory/2908-0-0x00000000741B0000-0x000000007475B000-memory.dmp

Filesize
5.7MB

Download
memory/2908-1-0x00000000741B0000-0x000000007475B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads