4b2be83114240fe28eb4dbb8b51e19c4d3a18897329d9c7de136d11fd2cf05ae

General

Target

4b2be83114240fe28eb4dbb8b51e19c4d3a18897329d9c7de136d11fd2cf05ae.xlsm
Size

21KB
MD5

3b1c27c180c794aa41a3e3f953f86093
SHA1

24dbd38b3f7d8782a8e41dcdd62ad4a75eec7678
SHA256

4b2be83114240fe28eb4dbb8b51e19c4d3a18897329d9c7de136d11fd2cf05ae
SHA512

33a2402d73f58c27e8f02d44125279a344a375f82905fa197df9ccf63f49a898b9540f29a8c5839fae3daa180ce3847ee98e175c650e66e72ca188b35ef8bd65
SSDEEP

384:/huAi/NjZS8EibbwBlwegASYrLb5CzgObff9kC+xbX77NWu:/tsNxzXQFCBn9kC+xbL71

Score

10^/10

discovery

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://beetle-j.jp/wp-admin/ErM4mW05tdj/

xlm40.dropper

https://brutobrasil.com.br/pdf/toO18cIP3/

xlm40.dropper

http://e3technology.in/2checkout_integration_php/rDcr1Wl90WWA9M/

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

regsvr32.exe

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1752	4540	regsvr32.exe	82

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

regsvr32.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.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
4540	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid	Process
4540	EXCEL.EXE
4540	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	Process
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE
4540	EXCEL.EXE

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

EXCEL.EXE

description	pid	Process	procid_target
PID 4540 wrote to memory of 1752	4540	EXCEL.EXE	100
PID 4540 wrote to memory of 1752	4540	EXCEL.EXE	100
PID 4540 wrote to memory of 1752	4540	EXCEL.EXE	100

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\4b2be83114240fe28eb4dbb8b51e19c4d3a18897329d9c7de136d11fd2cf05ae.xlsm"
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:4540
- C:\Windows\SysWow64\regsvr32.exe
  C:\Windows\SysWow64\regsvr32.exe -s ..\rfs.dll
  2⤵
  - Process spawned unexpected child process
  - System Location Discovery: System Language Discovery
  PID:1752

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\rfs.dll

Filesize
114B

MD5
e89f75f918dbdcee28604d4e09dd71d7

SHA1
f9d9055e9878723a12063b47d4a1a5f58c3eb1e9

SHA256
6dc9c7fc93bb488bb0520a6c780a8d3c0fb5486a4711aca49b4c53fac7393023

SHA512
8df0ab2e3679b64a6174deff4259ae5680f88e3ae307e0ea2dfff88ec4ba14f3477c9fe3a5aa5da3a8e857601170a5108ed75f6d6975958ac7a314e4a336aed0

Download Submit
memory/4540-12-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-0-0x00007FFCBFA2D000-0x00007FFCBFA2E000-memory.dmp

Filesize
4KB

Download
memory/4540-7-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-4-0x00007FFC7FA10000-0x00007FFC7FA20000-memory.dmp

Filesize
64KB

Download
memory/4540-5-0x00007FFC7FA10000-0x00007FFC7FA20000-memory.dmp

Filesize
64KB

Download
memory/4540-6-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-9-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-8-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-2-0x00007FFC7FA10000-0x00007FFC7FA20000-memory.dmp

Filesize
64KB

Download
memory/4540-3-0x00007FFC7FA10000-0x00007FFC7FA20000-memory.dmp

Filesize
64KB

Download
memory/4540-13-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-14-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-11-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-15-0x00007FFC7D0B0000-0x00007FFC7D0C0000-memory.dmp

Filesize
64KB

Download
memory/4540-10-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-16-0x00007FFC7D0B0000-0x00007FFC7D0C0000-memory.dmp

Filesize
64KB

Download
memory/4540-23-0x00007FFCBFA2D000-0x00007FFCBFA2E000-memory.dmp

Filesize
4KB

Download
memory/4540-24-0x00007FFCBF990000-0x00007FFCBFB85000-memory.dmp

Filesize
2.0MB

Download
memory/4540-1-0x00007FFC7FA10000-0x00007FFC7FA20000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads