1b59888d6384537c8efd4150a6070c8b7ded99f8c3b35ab2deb58491e8927969

General

Target

Debt-Details-737504944-05132021.xlsm
Size

196KB
MD5

422c09861a2824f055f820602cc50152
SHA1

fb1e3fd57c83499b265561f7a0b0d30c6c4a9c64
SHA256

25a5318acb0bb58d47fffcc5fff63c96f750bce41259970567d061cffc804f9a
SHA512

82ed42f816232cd2813320e95b75abfa07c668d125ea0e5834292e5dc65245e996bc0e6e6586ed41ac9c1d5b00785d908574010fb578d534e6e655e0eaf65c6e

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	1576	2112	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2716	2112	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2780	2112	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

2112 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE
2112	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 2112 wrote to memory of 1576	2112	EXCEL.EXE	rundll32.exe
PID 2112 wrote to memory of 1576	2112	EXCEL.EXE	rundll32.exe
PID 2112 wrote to memory of 2716	2112	EXCEL.EXE	rundll32.exe
PID 2112 wrote to memory of 2716	2112	EXCEL.EXE	rundll32.exe
PID 2112 wrote to memory of 2780	2112	EXCEL.EXE	rundll32.exe
PID 2112 wrote to memory of 2780	2112	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-737504944-05132021.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2112

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1576

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2716

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:2780

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1576-179-0x0000000000000000-mapping.dmp

Download
memory/2112-114-0x00007FF7A2550000-0x00007FF7A5B06000-memory.dmp

Filesize
53.7MB

Download
memory/2112-115-0x00007FF824490000-0x00007FF8244A0000-memory.dmp

Filesize
64KB

Download
memory/2112-116-0x00007FF824490000-0x00007FF8244A0000-memory.dmp

Filesize
64KB

Download
memory/2112-117-0x00007FF824490000-0x00007FF8244A0000-memory.dmp

Filesize
64KB

Download
memory/2112-118-0x00007FF824490000-0x00007FF8244A0000-memory.dmp

Filesize
64KB

Download
memory/2112-121-0x00007FF824490000-0x00007FF8244A0000-memory.dmp

Filesize
64KB

Download
memory/2112-122-0x00007FF844C90000-0x00007FF845D7E000-memory.dmp

Filesize
16.9MB

Download
memory/2112-123-0x00007FF842D90000-0x00007FF844C85000-memory.dmp

Filesize
31.0MB

Download
memory/2716-180-0x0000000000000000-mapping.dmp

Download
memory/2780-181-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads