28e2a587439b687fbb213fa32d3ddc8edd92e295cd788d5e42005dac1159cf69

General

Target

28e2a587439b687fbb213fa32d3ddc8edd92e295cd788d5e42005dac1159cf69.xlsm
Size

32KB
MD5

96edfaa4cc37d7db9713cc2a68de53c8
SHA1

74b26a8ecae65ebf51cd182e3926e80dae428e1b
SHA256

28e2a587439b687fbb213fa32d3ddc8edd92e295cd788d5e42005dac1159cf69
SHA512

bbc7ebc84a4615b892c32163a4365296f7ab1a85ad26d6ae266b8cfe1f942f3db29493f1c141bc9d8ae23d1b8c87418336c9f219bd600ca449db079845f9a4e6
SSDEEP

768:gjf8WFhN7beEizXT2LxdFfPdkqstJVE6D:6EsTXrgXUndkq8E6D

Score

10^/10

discovery

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://www.alejandrovillar.com/MSL/eKDWjpa4OHRxpysOTFe/

xlm40.dropper

https://alejandrastamateas.com/web/ZxA3zHwsH3r/

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\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1772	4812	regsvr32.exe	83

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

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

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
4812	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4812	EXCEL.EXE
4812	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE
4812	EXCEL.EXE

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 1772	4812	EXCEL.EXE	93
PID 4812 wrote to memory of 1772	4812	EXCEL.EXE	93
PID 4812 wrote to memory of 1772	4812	EXCEL.EXE	93

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\28e2a587439b687fbb213fa32d3ddc8edd92e295cd788d5e42005dac1159cf69.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:4812
- 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:1772

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
d911d5cdb4d0380a4f7019447486b8c1

SHA1
bdf48d963efdf4ac60331e1a2ceb290707b355d7

SHA256
c8f17235fe205e1c136519a2f13e0ca1e0aa9b438efe4bbf08076a91a3bdf1a2

SHA512
d43e0bd3056e2ffd8e561ca017535c93db3610288a28e4bdb5e2eacaff06225fa65c37d2d2d91f6e52f4ea3666497eb94accad0e1957059e4bcc9f5c3026f1e3

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

Filesize
202KB

MD5
5579d9981ff17d710d7b515a21ccaf31

SHA1
c6c9ca2a98ecb18feeb5768c8284f9b9e86fc624

SHA256
9865ad1fb0be0397e7d1d50042983e5620257a0e1642ef4c247ebd017312ee4a

SHA512
d8b9aa9dfc576f1a3891a22c0ee244068bf5cb13650b0cf554b311de6f4833bfabfd4811fa999613f0d5d5ab2279a29143b317d31a8fb66d06611ba526251c37

Download Submit
memory/4812-8-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-5-0x00007FFEC9E10000-0x00007FFEC9E20000-memory.dmp

Filesize
64KB

Download
memory/4812-7-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-18-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-11-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-12-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-10-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-13-0x00007FFEC7D00000-0x00007FFEC7D10000-memory.dmp

Filesize
64KB

Download
memory/4812-14-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-16-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-15-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-9-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-0-0x00007FFF09E2D000-0x00007FFF09E2E000-memory.dmp

Filesize
4KB

Download
memory/4812-2-0x00007FFEC9E10000-0x00007FFEC9E20000-memory.dmp

Filesize
64KB

Download
memory/4812-4-0x00007FFEC9E10000-0x00007FFEC9E20000-memory.dmp

Filesize
64KB

Download
memory/4812-21-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-20-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-19-0x00007FFEC7D00000-0x00007FFEC7D10000-memory.dmp

Filesize
64KB

Download
memory/4812-17-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-6-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-3-0x00007FFEC9E10000-0x00007FFEC9E20000-memory.dmp

Filesize
64KB

Download
memory/4812-45-0x00007FFF09E2D000-0x00007FFF09E2E000-memory.dmp

Filesize
4KB

Download
memory/4812-46-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-47-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-48-0x00007FFF09D90000-0x00007FFF09F85000-memory.dmp

Filesize
2.0MB

Download
memory/4812-1-0x00007FFEC9E10000-0x00007FFEC9E20000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads