da8cbc0a075894589f035df094c8ba2aeb68c42f1d5e5eda409f2bfeb4290b87

Analysis

max time kernel
61s
max time network
127s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
20/11/2024, 13:07

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General

Target

da8cbc0a075894589f035df094c8ba2aeb68c42f1d5e5eda409f2bfeb4290b87.xlsm
Size

21KB
MD5

755e79d9556d704fb367009d7c6845fb
SHA1

592db3274290b0f8609e8a5b319509f12c5bcf05
SHA256

da8cbc0a075894589f035df094c8ba2aeb68c42f1d5e5eda409f2bfeb4290b87
SHA512

0fed8bc73eed7211a495d6a238ad96c83fb2a98bd5d00036de914113a2dafcb6b0f469c24def1e47a09e0f7bc7c84d13fd67406fb8b882ee3dc38e73c2215e82
SSDEEP

384:fhuAi/NjZS8EibbwBlwegASYrLb5CzgObff9kC+xbX77NWu:ftsNxzXQFCBn9kC+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.

description	pid	pid_target	Process	procid_target
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1988	2524	regsvr32.exe	29

System Location Discovery: System Language Discovery 1 TTPs 2 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

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

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2524	EXCEL.EXE

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2524	EXCEL.EXE
2524	EXCEL.EXE
2524	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31
PID 2524 wrote to memory of 1988	2524	EXCEL.EXE	31

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\da8cbc0a075894589f035df094c8ba2aeb68c42f1d5e5eda409f2bfeb4290b87.xlsm
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2524
- 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:1988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

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/2524-1-0x000000007296D000-0x0000000072978000-memory.dmp

Filesize
44KB

Download
memory/2524-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2524-2-0x000000007296D000-0x0000000072978000-memory.dmp

Filesize
44KB

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads