ef2ce641a4e9f270eea626e8e4800b0b97b4a436c40e7af30aeb6f02566b809c

Resubmissions

29-11-2022 16:30

221129-tz6vbshg41 10

02-11-2022 08:18

221102-j7caksbbek 10

Analysis

max time kernel
145s
max time network
143s
platform
windows10-1703_x64
resource
win10-20220812-en
resource tags

arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
submitted
02-11-2022 08:18

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General

Target

ef2ce641a4e9f270eea626e8e4800b0b97b4a436c40e7af30aeb6f02566b809c.xls
Size

216KB
MD5

2486374800299563ab8934122234242a
SHA1

47bfe94aa96ef43231890f04ccd286b0888e10c8
SHA256

ef2ce641a4e9f270eea626e8e4800b0b97b4a436c40e7af30aeb6f02566b809c
SHA512

74e52e1e1317908447340cbba32949321ed435f17a524224af80236ecdf67187c83908cca514e82a49b9abe9495125ba741e01ed8f30663124c13fce339c63e5
SSDEEP

6144:bKpb8rGYrMPe3q7Q0XV5xtuEsi8/dgAyY+TAQXTHGUMEyP5p6f5jQmK:GbGUMVWlbK

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://audioselec.com/about/dDw5ggtyMojggTqhc/

xlm40.dropper

https://geringer-muehle.de/wp-admin/G/

xlm40.dropper

http://intolove.co.uk/wp-admin/FbGhiWtrEzrQ/

xlm40.dropper

http://isc.net.ua/themes/3rU/

Signatures

Process spawned unexpected child process 4 IoCs

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

Processes:

regsvr32.exeregsvr32.exeregsvr32.exeregsvr32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4712	4536	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4724	4536	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4628	4536	regsvr32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4608	4536	regsvr32.exe	EXCEL.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:

EXCEL.EXE

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

4536 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

4536 EXCEL.EXE
4536 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE
4536	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4536 wrote to memory of 4712	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4712	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4724	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4724	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4628	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4628	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4608	4536	EXCEL.EXE	regsvr32.exe
PID 4536 wrote to memory of 4608	4536	EXCEL.EXE	regsvr32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\ef2ce641a4e9f270eea626e8e4800b0b97b4a436c40e7af30aeb6f02566b809c.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:4536
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe ..\oxnv1.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4712
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe ..\oxnv2.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4724
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe ..\oxnv3.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4628
- C:\Windows\System32\regsvr32.exe
  C:\Windows\System32\regsvr32.exe ..\oxnv4.ooccxx
  2⤵
  - Process spawned unexpected child process
  PID:4608

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/4536-310-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-117-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-118-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-119-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-128-0x00007FFC7D9C0000-0x00007FFC7D9D0000-memory.dmp

Filesize
64KB

Download
memory/4536-129-0x00007FFC7D9C0000-0x00007FFC7D9D0000-memory.dmp

Filesize
64KB

Download
memory/4536-313-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-312-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-311-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4536-116-0x00007FFC81330000-0x00007FFC81340000-memory.dmp

Filesize
64KB

Download
memory/4608-276-0x0000000000000000-mapping.dmp

Download
memory/4628-275-0x0000000000000000-mapping.dmp

Download
memory/4712-268-0x0000000000000000-mapping.dmp

Download
memory/4724-271-0x0000000000000000-mapping.dmp

Download