5a81d2ed3941ffb97a4c6b16e543835f9398f191cce71b56e1e71e0bedb432df

General

Target

5a81d2ed3941ffb97a4c6b16e543835f9398f191cce71b56e1e71e0bedb432df.xlsm
Size

21KB
MD5

2944f31a4cd63bc133e7afc02476bcb9
SHA1

f21a5178fe72c2e0b22efc7b6e11e0a248ce2432
SHA256

5a81d2ed3941ffb97a4c6b16e543835f9398f191cce71b56e1e71e0bedb432df
SHA512

0bb514800b4d60bd03e8a8392b8ef4a4f74b1825915902ebeff3840d4a4ddb2a9bec15eb7820d56d2f096a830b49a8bb43a7fd080d10446b3607e1f21b2f43a9
SSDEEP

384:PGQT82uAi/NjxhS8EibbwBlwPsg1SYrLb5CzgObff9kC+xbX7tPhPng:+BusNPzXx5FCBn9kC+xbLtPhI

Score

10^/10

discovery

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://bulldogironworksllc.com/temp/r8YAI2o98o4j0UPn/

xlm40.dropper

https://brucemulkey.com/wp-admin/XGXUrF2z0I/

xlm40.dropper

http://www.buddymorel.com/cdar/3Egg7sUHTTd8kSrFj/

xlm40.dropper

http://altunyapiinsaat.com/datyusdtyuastbgdasg-23/vKckKhX11LJ/

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	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2604	4436	regsvr32.exe	EXCEL.EXE

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

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

4436 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

4436 EXCEL.EXE
4436 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4436 wrote to memory of 2604	4436	EXCEL.EXE	regsvr32.exe
PID 4436 wrote to memory of 2604	4436	EXCEL.EXE	regsvr32.exe
PID 4436 wrote to memory of 2604	4436	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\5a81d2ed3941ffb97a4c6b16e543835f9398f191cce71b56e1e71e0bedb432df.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:4436
- 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:2604

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\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms

Filesize
1KB

MD5
6bd70aa58d8d994d858711b0d098b8af

SHA1
18356a2a3204f68caf78b36cb5e95092e08c1a1a

SHA256
53e3db7e02d9ce84e60710a51bd13d26b1eb1b8ff034d6ae252f7741d7f2826f

SHA512
6b0febee3591028b4dbb43b8834d14b61709206658fabe2c142eef1d358019ffa28c91a0b475dca7e45da8ea00dbdb246b9e9f0e8cb45312adb5df59a6ed9085

Download Submit
C:\Users\Admin\rfs.dll

Filesize
16KB

MD5
e2088acde2749a47f0b9d8aee0348ac2

SHA1
45b0177b0b63979d2d088ae236c2a083a86b6052

SHA256
7f40b1b5a7cdf6e6ae4da7523093d90221635435eda79cbc8ac4e7ee06f33c62

SHA512
99edb2822fa01fc331ab08a8ebacd4adb42a33ff35402128fdaf41868396f72b71a0d8d497e54e68d59bd3e4649f1aea4d203c1f1f9296c16552b79fdf3b90bb

Download Submit
memory/4436-7-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-0-0x00007FFB605D0000-0x00007FFB605E0000-memory.dmp

Filesize
64KB

Download
memory/4436-1-0x00007FFBA05ED000-0x00007FFBA05EE000-memory.dmp

Filesize
4KB

Download
memory/4436-9-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-10-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-12-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-11-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-13-0x00007FFB5DC70000-0x00007FFB5DC80000-memory.dmp

Filesize
64KB

Download
memory/4436-8-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-16-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-2-0x00007FFB605D0000-0x00007FFB605E0000-memory.dmp

Filesize
64KB

Download
memory/4436-3-0x00007FFB605D0000-0x00007FFB605E0000-memory.dmp

Filesize
64KB

Download
memory/4436-14-0x00007FFB5DC70000-0x00007FFB5DC80000-memory.dmp

Filesize
64KB

Download
memory/4436-6-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-18-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-19-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-17-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-5-0x00007FFB605D0000-0x00007FFB605E0000-memory.dmp

Filesize
64KB

Download
memory/4436-4-0x00007FFB605D0000-0x00007FFB605E0000-memory.dmp

Filesize
64KB

Download
memory/4436-40-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-41-0x00007FFBA05ED000-0x00007FFBA05EE000-memory.dmp

Filesize
4KB

Download
memory/4436-42-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download
memory/4436-15-0x00007FFBA0550000-0x00007FFBA0745000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads