66d37b5b81171faddc14416c45d226951afc93766c907e471a54b080b36c7481

General

Target

66d37b5b81171faddc14416c45d226951afc93766c907e471a54b080b36c7481.xls
Size

217KB
MD5

c39f91f12aa87deadfb0c9f1a3a2e198
SHA1

dcfa0e546d521017a66643b19c50e552dc00a7c6
SHA256

66d37b5b81171faddc14416c45d226951afc93766c907e471a54b080b36c7481
SHA512

c1a775b0dba01d64ad324af431c27574172b4a8298d9448f6712a7dfc5d4530d16ada068987e78b8891ea57bbda12ea69a0cb762c3e7dc620f5cb8c05c9652a8
SSDEEP

6144:zKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgXyY+TAQXTHGUMEyP5p6f5jQm6:DbGUMVWlb6

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://barkstage.es/wp-content/0E7NdYl7TZuHMJq7/

xlm40.dropper

http://contactworks.nl/images_old/NuEAhfF0PCFhvv/

xlm40.dropper

http://www.iam.ch/wp-content/cache/minify/O1OAjWnfen/

xlm40.dropper

https://www.elaboro.pl/wp-admin/J0hwyIMsk9YFIi/

Signatures

Process spawned unexpected child process 4 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	3180	1752	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4340	1752	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	5068	1752	regsvr32.exe	65
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4972	1752	regsvr32.exe	65

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
1752	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1752	EXCEL.EXE
1752	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE
1752	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 3180	1752	EXCEL.EXE	68
PID 1752 wrote to memory of 3180	1752	EXCEL.EXE	68
PID 1752 wrote to memory of 4340	1752	EXCEL.EXE	69
PID 1752 wrote to memory of 4340	1752	EXCEL.EXE	69
PID 1752 wrote to memory of 5068	1752	EXCEL.EXE	70
PID 1752 wrote to memory of 5068	1752	EXCEL.EXE	70
PID 1752 wrote to memory of 4972	1752	EXCEL.EXE	71
PID 1752 wrote to memory of 4972	1752	EXCEL.EXE	71

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\66d37b5b81171faddc14416c45d226951afc93766c907e471a54b080b36c7481.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:1752
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv1.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:3180
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv2.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4340
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv3.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:5068
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe /S ..\oxnv4.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4972

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/1752-312-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-120-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-119-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-121-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-130-0x00007FF84DFE0000-0x00007FF84DFF0000-memory.dmp

Filesize
64KB

Download
memory/1752-131-0x00007FF84DFE0000-0x00007FF84DFF0000-memory.dmp

Filesize
64KB

Download
memory/1752-118-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-315-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-314-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/1752-313-0x00007FF851770000-0x00007FF851780000-memory.dmp

Filesize
64KB

Download
memory/3180-270-0x0000000000000000-mapping.dmp

Download
memory/4340-271-0x0000000000000000-mapping.dmp

Download
memory/4972-275-0x0000000000000000-mapping.dmp

Download
memory/5068-272-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads