649e5a00f34947d6f200f29666e38e6f66c264ec4bf5346b1b68770ca95ca095

General

Target

Debt-Details-1932499915-05132021.xlsm
Size

196KB
MD5

4eac2ae794168009d07bcf6ce582f06e
SHA1

567a2839f36b42e30d114f56f4dd775bdfecd8a1
SHA256

311e7aea7bb5f1b450543acb103eb34fa0d1d3e0e2e051474ad4ceb73159befa
SHA512

a88fc0a8ac489b7b7a78ed1cce91ce48195b1220ac8a512d5f44cd0bddf5ebf48906f1f0100aab889acf3a8c40570c70921f9d1f386dd4a6330405dc75c86b44

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	3632	3400	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3092	3400	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3668	3400	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

3400 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE
3400	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3400 wrote to memory of 3632	3400	EXCEL.EXE	rundll32.exe
PID 3400 wrote to memory of 3632	3400	EXCEL.EXE	rundll32.exe
PID 3400 wrote to memory of 3092	3400	EXCEL.EXE	rundll32.exe
PID 3400 wrote to memory of 3092	3400	EXCEL.EXE	rundll32.exe
PID 3400 wrote to memory of 3668	3400	EXCEL.EXE	rundll32.exe
PID 3400 wrote to memory of 3668	3400	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-1932499915-05132021.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3400

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3632

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3092

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3668

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/3092-180-0x0000000000000000-mapping.dmp

Download
memory/3400-114-0x00007FF7C97F0000-0x00007FF7CCDA6000-memory.dmp

Filesize
53.7MB

Download
memory/3400-115-0x00007FF810580000-0x00007FF810590000-memory.dmp

Filesize
64KB

Download
memory/3400-116-0x00007FF810580000-0x00007FF810590000-memory.dmp

Filesize
64KB

Download
memory/3400-117-0x00007FF810580000-0x00007FF810590000-memory.dmp

Filesize
64KB

Download
memory/3400-118-0x00007FF810580000-0x00007FF810590000-memory.dmp

Filesize
64KB

Download
memory/3400-121-0x00007FF810580000-0x00007FF810590000-memory.dmp

Filesize
64KB

Download
memory/3400-122-0x00007FF830860000-0x00007FF83194E000-memory.dmp

Filesize
16.9MB

Download
memory/3400-123-0x00007FF82E960000-0x00007FF830855000-memory.dmp

Filesize
31.0MB

Download
memory/3632-179-0x0000000000000000-mapping.dmp

Download
memory/3668-181-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads