bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8

General

Target

bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe
Size

60KB
MD5

0ed2ca539a01cdb86c88a9a1604b2005
SHA1

4fed7eae00bfa21938e49f33b7c6794fd7d0750c
SHA256

bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8
SHA512

34dad101cd7c5f9ff2267674d224986b9274e0e17d9ae665ca1af4ffa57408106238b1e248045465ab17c72a4b92473ab3714aefb705d95f9725a4251379c7e2

Score

9^/10

persistence discovery exploit ransomware

Malware Config

Signatures

Modifies service 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

vssvc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer	vssvc.exe

Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

2188 attrib.exe
260 attrib.exe
280 attrib.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1516 vssvc.exe
Token: SeRestorePrivilege 1516 vssvc.exe
Token: SeAuditPrivilege 1516 vssvc.exe
Executes dropped EXE 2 IoCs

Processes:

Resources:binResources.exe

pid process

1548 Resources:bin
3812 Resources.exe

pid	process
2188	attrib.exe
260	attrib.exe
280	attrib.exe

description	pid	process
Token: SeBackupPrivilege	1516	vssvc.exe
Token: SeRestorePrivilege	1516	vssvc.exe
Token: SeAuditPrivilege	1516	vssvc.exe

pid	process
1548	Resources:bin
3812	Resources.exe

Drops file in System32 directory 2 IoCs

Processes:

Resources:binattrib.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Resources.exe	Resources:bin
File opened for modification	C:\Windows\SysWOW64\Resources.exe	attrib.exe

Modifies file permissions 1 TTPs 2 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

2604 takeown.exe
2824 icacls.exe
Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

2604 takeown.exe
2824 icacls.exe

pid	process
2604	takeown.exe
2824	icacls.exe

pid	process
2604	takeown.exe
2824	icacls.exe

NTFS ADS 1 IoCs

Processes:

bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Resources:bin	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

1664 vssadmin.exe

pid	process
1664	vssadmin.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exeResources:binResources.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1484 wrote to memory of 1548	1484	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe	Resources:bin
PID 1484 wrote to memory of 1548	1484	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe	Resources:bin
PID 1484 wrote to memory of 1548	1484	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe	Resources:bin
PID 1548 wrote to memory of 1664	1548	Resources:bin	vssadmin.exe
PID 1548 wrote to memory of 1664	1548	Resources:bin	vssadmin.exe
PID 1548 wrote to memory of 2604	1548	Resources:bin	takeown.exe
PID 1548 wrote to memory of 2604	1548	Resources:bin	takeown.exe
PID 1548 wrote to memory of 2604	1548	Resources:bin	takeown.exe
PID 1548 wrote to memory of 2824	1548	Resources:bin	icacls.exe
PID 1548 wrote to memory of 2824	1548	Resources:bin	icacls.exe
PID 1548 wrote to memory of 2824	1548	Resources:bin	icacls.exe
PID 3812 wrote to memory of 3980	3812	Resources.exe	cmd.exe
PID 3812 wrote to memory of 3980	3812	Resources.exe	cmd.exe
PID 3812 wrote to memory of 3980	3812	Resources.exe	cmd.exe
PID 3980 wrote to memory of 984	3980	cmd.exe	choice.exe
PID 3980 wrote to memory of 984	3980	cmd.exe	choice.exe
PID 3980 wrote to memory of 984	3980	cmd.exe	choice.exe
PID 1548 wrote to memory of 1672	1548	Resources:bin	cmd.exe
PID 1548 wrote to memory of 1672	1548	Resources:bin	cmd.exe
PID 1548 wrote to memory of 1672	1548	Resources:bin	cmd.exe
PID 1484 wrote to memory of 3484	1484	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe	cmd.exe
PID 1484 wrote to memory of 3484	1484	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe	cmd.exe
PID 1484 wrote to memory of 3484	1484	bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe	cmd.exe
PID 1672 wrote to memory of 3776	1672	cmd.exe	choice.exe
PID 1672 wrote to memory of 3776	1672	cmd.exe	choice.exe
PID 1672 wrote to memory of 3776	1672	cmd.exe	choice.exe
PID 3484 wrote to memory of 980	3484	cmd.exe	choice.exe
PID 3484 wrote to memory of 980	3484	cmd.exe	choice.exe
PID 3484 wrote to memory of 980	3484	cmd.exe	choice.exe
PID 3980 wrote to memory of 2188	3980	cmd.exe	attrib.exe
PID 3980 wrote to memory of 2188	3980	cmd.exe	attrib.exe
PID 3980 wrote to memory of 2188	3980	cmd.exe	attrib.exe
PID 1672 wrote to memory of 260	1672	cmd.exe	attrib.exe
PID 1672 wrote to memory of 260	1672	cmd.exe	attrib.exe
PID 1672 wrote to memory of 260	1672	cmd.exe	attrib.exe
PID 3484 wrote to memory of 280	3484	cmd.exe	attrib.exe
PID 3484 wrote to memory of 280	3484	cmd.exe	attrib.exe
PID 3484 wrote to memory of 280	3484	cmd.exe	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe
"C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1484
- C:\Users\Admin\AppData\Roaming\Resources:bin
  C:\Users\Admin\AppData\Roaming\Resources:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:1548
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1664
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Resources.exe
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:2604
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Resources.exe /reset
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:2824
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Resources" & del "C:\Users\Admin\AppData\Roaming\Resources"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1672
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:3776
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Resources"
      4⤵
      Views/modifies file attributes
      PID:260
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe" & del "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3484
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:980
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\bcdac1a2b67e2b47f8129814dca3bcf7d55404757eb09f1c3103f57da3153ec8.exe"
    3⤵
    - Views/modifies file attributes
    PID:280

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1516

C:\Windows\SysWOW64\Resources.exe
C:\Windows\SysWOW64\Resources.exe -s
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:3812
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Resources.exe" & del "C:\Windows\SysWOW64\Resources.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3980
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:984
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Resources.exe"
    3⤵
    - Views/modifies file attributes
    - Drops file in System32 directory
    PID:2188