a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9

General

Target

a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
Size

146KB
MD5

4c780698442ecc24f55df7a587a38d68
SHA1

9596b5886cbffb484d963d20c1de2a04a21490d3
SHA256

a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9
SHA512

7aabcf0a7a328d1fe1b5941b5bcffa5a314ce4e0de5801522eb16c384e5ffa8a1ae92e6fc8df9f8068b59f7595f32d643b39b96433deab5b7acf07971795776b
SSDEEP

3072:rNsJHOLmAfVIYckg86upr8TW/qEqa4f9zr2prDw8taw:yHOvfVoN1uwWita4f9zqnwhw

Score

10^/10

evasion persistence upx

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 4 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	wmpbk86.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpbk86.exe = "C:\\Windows\\SysWOW64\\wmpbk86.exe:*:Enabled:Windows Backup Service"	wmpbk86.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List	wmpbk86.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\C:\Windows\SysWOW64\wmpbk86.exe = "C:\\Windows\\SysWOW64\\wmpbk86.exe:*:Enabled:Windows Backup Service"	wmpbk86.exe

Executes dropped EXE 2 IoCs

pid	Process
1296	wmpbk86.exe
1292	wmpbk86.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/540-60-0x0000000000400000-0x0000000000401000-memory.dmp	upx
behavioral1/memory/540-61-0x0000000000400000-0x000000000042A000-memory.dmp	upx

Deletes itself 1 IoCs

pid	Process
1292	wmpbk86.exe

Loads dropped DLL 1 IoCs

pid	Process
540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	wmpbk86.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Backup Service = "C:\\Windows\\SysWOW64\\wmpbk86.exe"	wmpbk86.exe

Maps connected drives based on registry 3 TTPs 4 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	wmpbk86.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	wmpbk86.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
File opened for modification	C:\Windows\SysWOW64\wmpbk86.exe	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
File created	C:\Windows\SysWOW64\wmpbk86.exe	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
File opened for modification	C:\Windows\SysWOW64\	wmpbk86.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1296 set thread context of 1292	1296	wmpbk86.exe	29

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
1292	wmpbk86.exe
1292	wmpbk86.exe

Suspicious use of UnmapMainImage 1 IoCs

pid	Process
1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 1048 wrote to memory of 540	1048	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	27
PID 540 wrote to memory of 1296	540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	28
PID 540 wrote to memory of 1296	540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	28
PID 540 wrote to memory of 1296	540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	28
PID 540 wrote to memory of 1296	540	a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe	28
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1296 wrote to memory of 1292	1296	wmpbk86.exe	29
PID 1292 wrote to memory of 1216	1292	wmpbk86.exe	15
PID 1292 wrote to memory of 1216	1292	wmpbk86.exe	15

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:1216
- C:\Users\Admin\AppData\Local\Temp\a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
  "C:\Users\Admin\AppData\Local\Temp\a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of UnmapMainImage
  - Suspicious use of WriteProcessMemory
  PID:1048
- - C:\Users\Admin\AppData\Local\Temp\a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe
    "C:\Users\Admin\AppData\Local\Temp\a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9.exe"
    3⤵
    - Loads dropped DLL
    - Maps connected drives based on registry
    - Drops file in System32 directory
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:540
  - - C:\Windows\SysWOW64\wmpbk86.exe
      "C:\Windows\SysWOW64\wmpbk86.exe" C:\Users\Admin\AppData\Local\Temp\A16B4A~1.EXE
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of WriteProcessMemory
      PID:1296
    - - C:\Windows\SysWOW64\wmpbk86.exe
        
        "C:\Windows\SysWOW64\wmpbk86.exe" C:\Users\Admin\AppData\Local\Temp\A16B4A~1.EXE
        5⤵
        Modifies firewall policy service
        Executes dropped EXE
        Deletes itself
        Adds Run key to start application
        Maps connected drives based on registry
        Drops file in System32 directory
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:1292

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\SysWOW64\wmpbk86.exe

Filesize
146KB

MD5
4c780698442ecc24f55df7a587a38d68

SHA1
9596b5886cbffb484d963d20c1de2a04a21490d3

SHA256
a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9

SHA512
7aabcf0a7a328d1fe1b5941b5bcffa5a314ce4e0de5801522eb16c384e5ffa8a1ae92e6fc8df9f8068b59f7595f32d643b39b96433deab5b7acf07971795776b

Download Submit
C:\Windows\SysWOW64\wmpbk86.exe

Filesize
146KB

MD5
4c780698442ecc24f55df7a587a38d68

SHA1
9596b5886cbffb484d963d20c1de2a04a21490d3

SHA256
a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9

SHA512
7aabcf0a7a328d1fe1b5941b5bcffa5a314ce4e0de5801522eb16c384e5ffa8a1ae92e6fc8df9f8068b59f7595f32d643b39b96433deab5b7acf07971795776b

Download Submit
\Windows\SysWOW64\wmpbk86.exe

Filesize
146KB

MD5
4c780698442ecc24f55df7a587a38d68

SHA1
9596b5886cbffb484d963d20c1de2a04a21490d3

SHA256
a16b4a834cce5f6078682dd5d51fd80505705368616bb6fedc69e5e7f20055e9

SHA512
7aabcf0a7a328d1fe1b5941b5bcffa5a314ce4e0de5801522eb16c384e5ffa8a1ae92e6fc8df9f8068b59f7595f32d643b39b96433deab5b7acf07971795776b

Download Submit
memory/540-57-0x000000000044B000-0x000000000044C000-memory.dmp

Filesize
4KB

Download
memory/540-58-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/540-59-0x000000000044B000-0x000000000044C000-memory.dmp

Filesize
4KB

Download
memory/540-60-0x0000000000400000-0x0000000000401000-memory.dmp

Filesize
4KB

Download
memory/540-61-0x0000000000400000-0x000000000042A000-memory.dmp

Filesize
168KB

Download
memory/540-56-0x0000000000432000-0x000000000044AC00-memory.dmp

Filesize
99KB

Download
memory/540-55-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/1216-73-0x0000000002B10000-0x0000000002B2E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads