4c81a50e834bf77b8cd781a24247d3748372601df366b61a96bf7c30c8c46cca

General

Target

Debt-Details-1385401412-05132021.xlsm
Size

196KB
MD5

6c9c10e26b13844548eb88771049cd82
SHA1

a29161b4d65e61fc692033361b5d308c6952247b
SHA256

4c81a50e834bf77b8cd781a24247d3748372601df366b61a96bf7c30c8c46cca
SHA512

b463e6e15fa457d26e67f28c6c019e68fdefa7c5432a17bd17251acfa695fb57aa65d80fb8b83006b15c85fe12beb3fc0d6d3fb5a14e3b49e60feb4bf9ecd7fe

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 3 IoCs

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

Processes:

rundll32.exerundll32.exerundll32.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	3508	3896	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1940	3896	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1832	3896	rundll32.exe	EXCEL.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

3896 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE
3896	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3896 wrote to memory of 3508	3896	EXCEL.EXE	rundll32.exe
PID 3896 wrote to memory of 3508	3896	EXCEL.EXE	rundll32.exe
PID 3896 wrote to memory of 1940	3896	EXCEL.EXE	rundll32.exe
PID 3896 wrote to memory of 1940	3896	EXCEL.EXE	rundll32.exe
PID 3896 wrote to memory of 1832	3896	EXCEL.EXE	rundll32.exe
PID 3896 wrote to memory of 1832	3896	EXCEL.EXE	rundll32.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\Debt-Details-1385401412-05132021.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3896

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3508

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1940

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1832

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1832-181-0x0000000000000000-mapping.dmp

Download
memory/1940-180-0x0000000000000000-mapping.dmp

Download
memory/3508-179-0x0000000000000000-mapping.dmp

Download
memory/3896-114-0x00007FF70A400000-0x00007FF70D9B6000-memory.dmp

Filesize
53.7MB

Download
memory/3896-115-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

Filesize
64KB

Download
memory/3896-116-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

Filesize
64KB

Download
memory/3896-117-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

Filesize
64KB

Download
memory/3896-118-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

Filesize
64KB

Download
memory/3896-121-0x00007FFA28EA0000-0x00007FFA29F8E000-memory.dmp

Filesize
16.9MB

Download
memory/3896-122-0x00007FFA08250000-0x00007FFA08260000-memory.dmp

Filesize
64KB

Download
memory/3896-123-0x00007FFA26FA0000-0x00007FFA28E95000-memory.dmp

Filesize
31.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads