fd4e3fa8a8d9b59e58e08119e9aba18847b932c1ec8051b0544ebde855c19d46

General

Target
files_06.28.2021.doc
Size 50KB
Sample210629-9m72l4klda
SHA256 fd4e3fa8a8d9b59e58e08119e9aba18847b932c1ec8051b0544ebde855c19d46
MD5 d1a988c49d988c0ce5eb76d5f0f16f2f
SHA1 49b246f6b3e721f3466ddc3b018ed8c5fb671255
SHA512 acadf4fe6f7deb366015334689e82bd4a63388f4c8050dc86afb84733471148c7c7cdd387e803cc5d8c50e3ed7d2b056993c4a052ac418414e70fb8022f5df3a
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE is not expected to spawn this process	3864	2184	cmd.exe	45

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3400 created 4052	3400	WerFault.exe	78

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

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3268	4052	WerFault.exe	78
3400	4052	WerFault.exe	78

Checks processor information in registry 2 TTPs 3 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WINWORD.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	WINWORD.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WINWORD.EXE

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
2184	WINWORD.EXE
2184	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe
3268	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	3268	WerFault.exe
Token: SeBackupPrivilege	3268	WerFault.exe
Token: SeDebugPrivilege	3268	WerFault.exe

Suspicious use of SetWindowsHookEx 26 IoCs

pid	Process
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE
2184	WINWORD.EXE

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2184 wrote to memory of 3864	2184	WINWORD.EXE	76
PID 2184 wrote to memory of 3864	2184	WINWORD.EXE	76
PID 3864 wrote to memory of 4052	3864	cmd.exe	78
PID 3864 wrote to memory of 4052	3864	cmd.exe	78
PID 3864 wrote to memory of 4052	3864	cmd.exe	78

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\files_06.28.2021.doc" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2184
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c c:\\users\\public\\doubleBorderInt.hta
  2⤵
  - Process spawned unexpected child process
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3864
- - C:\Windows\SysWOW64\mshta.exe
    "C:\Windows\SysWOW64\mshta.exe" "C:\users\public\doubleBorderInt.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
    3⤵
    PID:4052
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1360
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3268
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4052 -s 1632
      4⤵
      Suspicious use of NtCreateProcessExOtherParentProcess
      Program crash
      PID:3400

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2184-114-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

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memory/2184-115-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

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memory/2184-116-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

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memory/2184-117-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

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memory/2184-119-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

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memory/2184-118-0x00007FF970E40000-0x00007FF973963000-memory.dmp

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memory/2184-122-0x00007FF969780000-0x00007FF96A86E000-memory.dmp

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memory/2184-123-0x00007FF967880000-0x00007FF969775000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads