b9ca91d4651446f6cd6283af2acc1a14c73e9abc746323cd684b8f208fc42b8f

General

Target

b9ca91d4651446f6cd6283af2acc1a14c73e9abc746323cd684b8f208fc42b8f.rtf
Size

1.9MB
MD5

3f57988fa30c927eaec2cd3ea07e1345
SHA1

02ada56f35fcf701b5f93e4133caef910d51f6b7
SHA256

b9ca91d4651446f6cd6283af2acc1a14c73e9abc746323cd684b8f208fc42b8f
SHA512

686e91ee0db732d984b48a4d44fbe4a4d94022b80420f67a89bd560fd9ab6d1dbfebe0f930c7c5b3590aac8c8d90c548f5764fbe8beda2cead1fe2978a7db9d1
SSDEEP

24576:eFj/+UN64hNf4nQbaOFjA1hVaZFdIsfy+aOEDlh6Nt3W2cp+jpAHsqTxRTr9D2yb:X

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.

Processes:

FLTLDR.EXE

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE is not expected to spawn this process	1716	4016	FLTLDR.EXE	WINWORD.EXE

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

Processes:

WINWORD.EXE

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

Processes:

WINWORD.EXE

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 10 IoCs

Processes:

WINWORD.EXE

description	ioc	process
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-2080014873-3981235291-1156272258-1939712598-457165840-3389079567-279426468\Children	WINWORD.EXE
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_8b5	WINWORD.EXE
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_8b5\Children	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-2080014873-3981235291-1156272258-1939712598-457165840-3389079567-279426468\Children	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-2080014873-3981235291-1156272258-1939712598-457165840-3389079567-279426468	WINWORD.EXE
Key created	\Registry\User\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-2080014873-3981235291-1156272258-1939712598-457165840-3389079567-279426468	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-2080014873-3981235291-1156272258-1939712598-457165840-3389079567-279426468\DisplayName = "OICE_16_974FA576_32C1D314_8B5"	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Mappings\S-1-15-2-2080014873-3981235291-1156272258-1939712598-457165840-3389079567-279426468\Moniker = "oice_16_974fa576_32c1d314_8b5"	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_8b5\Children	WINWORD.EXE
Key deleted	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\oice_16_974fa576_32c1d314_8b5	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 2 IoCs

Processes:

WINWORD.EXE

pid process

4016 WINWORD.EXE
4016 WINWORD.EXE
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

WINWORD.EXE

pid process

4016 WINWORD.EXE

Suspicious use of SetWindowsHookEx 15 IoCs

Processes:

WINWORD.EXE

pid	process
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE
4016	WINWORD.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

WINWORD.EXE

description	pid	process	target process
PID 4016 wrote to memory of 2468	4016	WINWORD.EXE	splwow64.exe
PID 4016 wrote to memory of 2468	4016	WINWORD.EXE	splwow64.exe
PID 4016 wrote to memory of 1716	4016	WINWORD.EXE	FLTLDR.EXE
PID 4016 wrote to memory of 1716	4016	WINWORD.EXE	FLTLDR.EXE

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\b9ca91d4651446f6cd6283af2acc1a14c73e9abc746323cd684b8f208fc42b8f.rtf" /o ""
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4016

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:2468

C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\FLTLDR.EXE
"C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\FLTLDR.EXE" C:\Program Files\Common Files\Microsoft Shared\GRPHFLT\PNG32.FLT
2⤵
- Process spawned unexpected child process
PID:1716

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Packages\oice_16_974fa576_32c1d314_8b5\AC\Temp\FLB2D4.tmp
Filesize
25KB

MD5
d8a8176ab9e7504d6af2b7216cc6ad1d

SHA1
d440f698fd666e11502635bf91ab8a8be3376ccc

SHA256
dca454b88ece53b28d84fe6492a94a0b93c91be840d647e2a645fe5f4b8e1f39

SHA512
730a10fc2b176c0be3987e7e4321819e454c18d8c0d8ba455d90551bf0f1e29cb5f329e6c245c598196965bacc438a29f6944772fb6ac3755b36e00e6b69c7fc

Download Submit
memory/1716-145-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/1716-144-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/1716-143-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/1716-142-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/1716-140-0x0000000000000000-mapping.dmp

Download
memory/2468-139-0x0000000000000000-mapping.dmp

Download
memory/4016-135-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/4016-138-0x00007FFD5A380000-0x00007FFD5A390000-memory.dmp

Filesize
64KB

Download
memory/4016-137-0x00007FFD5A380000-0x00007FFD5A390000-memory.dmp

Filesize
64KB

Download
memory/4016-136-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/4016-132-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/4016-134-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download
memory/4016-133-0x00007FFD5C5D0000-0x00007FFD5C5E0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads