53ead46fd6527c5e97e29944d6c40302be0b63192d00c1646939330fb2d319c0

General

Target

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
Size

1.1MB
MD5

13e623cdfb75d99ea7e04c6157ca8ae6
SHA1

f25f0b369a355f30f5e11ac11a7f644bcfefd963
SHA256

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772
SHA512

ea6b5c882a5298e527be1f3c40cc6d75c56453dd0111d7e9818c28fa7ec32feb19f17cab9a9e49eb0ab9f3a987f7dcc5cadfea7ae99a996f174b0a89e674f421

Score

9^/10

exploit ransomware persistence discovery

Malware Config

Signatures

Drops file in System32 directory 2 IoCs

Processes:

Pn:binattrib.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Pn.exe Pn:bin
File opened for modification C:\Windows\SysWOW64\Pn.exe attrib.exe

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

Suspicious use of WriteProcessMemory 52 IoCs

Processes:

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exePn:binPn.execmd.execmd.execmd.exe

description	pid	process	target process
PID 608 wrote to memory of 316	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Pn:bin
PID 608 wrote to memory of 316	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Pn:bin
PID 608 wrote to memory of 316	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Pn:bin
PID 608 wrote to memory of 316	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	Pn:bin
PID 316 wrote to memory of 1460	316	Pn:bin	vssadmin.exe
PID 316 wrote to memory of 1460	316	Pn:bin	vssadmin.exe
PID 316 wrote to memory of 1460	316	Pn:bin	vssadmin.exe
PID 316 wrote to memory of 1460	316	Pn:bin	vssadmin.exe
PID 316 wrote to memory of 1680	316	Pn:bin	takeown.exe
PID 316 wrote to memory of 1680	316	Pn:bin	takeown.exe
PID 316 wrote to memory of 1680	316	Pn:bin	takeown.exe
PID 316 wrote to memory of 1680	316	Pn:bin	takeown.exe
PID 316 wrote to memory of 1816	316	Pn:bin	icacls.exe
PID 316 wrote to memory of 1816	316	Pn:bin	icacls.exe
PID 316 wrote to memory of 1816	316	Pn:bin	icacls.exe
PID 316 wrote to memory of 1816	316	Pn:bin	icacls.exe
PID 1764 wrote to memory of 1836	1764	Pn.exe	cmd.exe
PID 1764 wrote to memory of 1836	1764	Pn.exe	cmd.exe
PID 1764 wrote to memory of 1836	1764	Pn.exe	cmd.exe
PID 1764 wrote to memory of 1836	1764	Pn.exe	cmd.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 316 wrote to memory of 1576	316	Pn:bin	cmd.exe
PID 316 wrote to memory of 1576	316	Pn:bin	cmd.exe
PID 316 wrote to memory of 1576	316	Pn:bin	cmd.exe
PID 316 wrote to memory of 1576	316	Pn:bin	cmd.exe
PID 608 wrote to memory of 1636	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 608 wrote to memory of 1636	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 608 wrote to memory of 1636	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 608 wrote to memory of 1636	608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe	cmd.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1636 wrote to memory of 1620	1636	cmd.exe	choice.exe
PID 1636 wrote to memory of 1620	1636	cmd.exe	choice.exe
PID 1636 wrote to memory of 1620	1636	cmd.exe	choice.exe
PID 1636 wrote to memory of 1620	1636	cmd.exe	choice.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1968	1576	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1968	1576	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1968	1576	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1968	1576	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1896	1636	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1896	1636	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1896	1636	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1896	1636	cmd.exe	attrib.exe

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1680 takeown.exe
1816 icacls.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

1460 vssadmin.exe

pid	process
1680	takeown.exe
1816	icacls.exe

pid	process
1460	vssadmin.exe

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\ASR Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer	vssvc.exe
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

NTFS ADS 1 IoCs

Processes:

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Pn:bin	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe

Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1680 takeown.exe
1816 icacls.exe

pid	process
1680	takeown.exe
1816	icacls.exe

Loads dropped DLL 2 IoCs

Processes:

aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe

pid	process
608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
608	aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe

Executes dropped EXE 2 IoCs

Processes:

Pn:binPn.exe

pid process

316 Pn:bin
1764 Pn.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 876 vssvc.exe
Token: SeRestorePrivilege 876 vssvc.exe
Token: SeAuditPrivilege 876 vssvc.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1636 cmd.exe
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

1968 attrib.exe
1932 attrib.exe
1896 attrib.exe

pid	process
316	Pn:bin
1764	Pn.exe

description	pid	process
Token: SeBackupPrivilege	876	vssvc.exe
Token: SeRestorePrivilege	876	vssvc.exe
Token: SeAuditPrivilege	876	vssvc.exe

pid	process
1636	cmd.exe

pid	process
1968	attrib.exe
1932	attrib.exe
1896	attrib.exe

C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe
"C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
1⤵
- Suspicious use of WriteProcessMemory
- NTFS ADS
- Loads dropped DLL
PID:608

C:\Users\Admin\AppData\Roaming\Pn:bin
C:\Users\Admin\AppData\Roaming\Pn:bin -r
2⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:316

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:1460

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Pn.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1680

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Pn.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1816

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Pn" & del "C:\Users\Admin\AppData\Roaming\Pn"
3⤵
- Suspicious use of WriteProcessMemory
PID:1576

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:1568

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Pn"
4⤵
- Views/modifies file attributes
PID:1968

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe" & del "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
2⤵
- Suspicious use of WriteProcessMemory
- Deletes itself
PID:1636

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1620

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\aa05e7a187ddec2e11fc1c9eafe61408d085b0ab6cd12caeaf531c9dca129772.exe"
3⤵
- Views/modifies file attributes
PID:1896

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:876

C:\Windows\SysWOW64\Pn.exe
C:\Windows\SysWOW64\Pn.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:1764

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Pn.exe" & del "C:\Windows\SysWOW64\Pn.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1836