bf63b9fb17e0a41c5279cec6ab8c9d9dbb6fd7aaf6465e861cc005c1ea5aecbe

General

Target

bf63b9fb17e0a41c5279cec6ab8c9d9dbb6fd7aaf6465e861cc005c1ea5aecbe.xlsm
Size

32KB
MD5

71e22e31c9e47ca22ea80518a81e5767
SHA1

b767ffe76201d052627c9a1f3d9f712f17783c53
SHA256

bf63b9fb17e0a41c5279cec6ab8c9d9dbb6fd7aaf6465e861cc005c1ea5aecbe
SHA512

e62df2f1875982f115cd49e681f5f555138e5db1eee911b1dd3c9846ad272f8fbc9ede72ebbc063d60f141f465173e46a91809b1b9ba5cd9cfe5bba331b06ff9
SSDEEP

768:cjf8WFhN7beEizXT2LxdFfPdkqstJVE6D:2EsTXrgXUndkq8E6D

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.

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	3864	3148	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 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

3148 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

3148 EXCEL.EXE
3148 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE
3148	EXCEL.EXE

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3148 wrote to memory of 3864	3148	EXCEL.EXE	regsvr32.exe
PID 3148 wrote to memory of 3864	3148	EXCEL.EXE	regsvr32.exe
PID 3148 wrote to memory of 3864	3148	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\bf63b9fb17e0a41c5279cec6ab8c9d9dbb6fd7aaf6465e861cc005c1ea5aecbe.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:3148
- 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:3864

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
f1e878542633b539d389325e871fcb53

SHA1
e2f83cd0f1983cfc0fff272ab0161fbb265b7eba

SHA256
dfadb784ba44b259625a841ace04c303eb30f972da0d5d2e228d2381f1160cf4

SHA512
a8fed54706e0d1cf97eb730d82c560a24d00f57d9959f5b9330d27cae8679ff9d62fbfda9bfea6f834bbdf8a620317ccaa3542d7419cc131566eb51541133e61

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

Filesize
202KB

MD5
539f9cf69b3477bbade872f9cb2c20da

SHA1
7739ad0149b311693d4d4e70020ad9f15dbf9c31

SHA256
14c16bddc40f6d3afa927344d84c04117832fe52d562dc4c9e153abfe6410f01

SHA512
4b80165fe14089298a826cd034a86039291a798f82984e8bd6966761937ea3595834ed4813140d9b8d8d36bce8be726e1bf14edae0c868738dcd79dde07bd8dd

Download Submit
memory/3148-16-0x00007FF9EBF90000-0x00007FF9EBFA0000-memory.dmp

Filesize
64KB

Download
memory/3148-9-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-12-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-7-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-10-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-6-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-11-0x00007FF9EBF90000-0x00007FF9EBFA0000-memory.dmp

Filesize
64KB

Download
memory/3148-13-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-17-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-14-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-2-0x00007FF9EE8F0000-0x00007FF9EE900000-memory.dmp

Filesize
64KB

Download
memory/3148-4-0x00007FF9EE8F0000-0x00007FF9EE900000-memory.dmp

Filesize
64KB

Download
memory/3148-15-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-8-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-18-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-5-0x00007FF9EE8F0000-0x00007FF9EE900000-memory.dmp

Filesize
64KB

Download
memory/3148-3-0x00007FF9EE8F0000-0x00007FF9EE900000-memory.dmp

Filesize
64KB

Download
memory/3148-0-0x00007FF9EE8F0000-0x00007FF9EE900000-memory.dmp

Filesize
64KB

Download
memory/3148-42-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-43-0x00007FFA2E90D000-0x00007FFA2E90E000-memory.dmp

Filesize
4KB

Download
memory/3148-44-0x00007FFA2E870000-0x00007FFA2EA65000-memory.dmp

Filesize
2.0MB

Download
memory/3148-1-0x00007FFA2E90D000-0x00007FFA2E90E000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads