87437de0c4fbde322bec0d7bf897927d60d4903925632aa4373bac43ed82f695

General

Target

Debt-Details-2065399866-05132021.xlsm
Size

196KB
MD5

ac9df8f0a9eb4d16bd673611f8062429
SHA1

76e7b947f54aada88a3ac4b892202ba9549f8e12
SHA256

87437de0c4fbde322bec0d7bf897927d60d4903925632aa4373bac43ed82f695
SHA512

7f299de372983072b5e149a2e47209daf202786678629e8f64bfddb137a553ad118795e48eb7dc74a1eeaaf5cff9b7f007403e9e4ffa4adc9d117ddade58bb5b

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	908	1108	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3004	1108	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3748	1108	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

1108 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

1108 EXCEL.EXE
1108 EXCEL.EXE

Suspicious use of SetWindowsHookEx 16 IoCs

Processes:

EXCEL.EXE

pid	process
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE
1108	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1108 wrote to memory of 908	1108	EXCEL.EXE	rundll32.exe
PID 1108 wrote to memory of 908	1108	EXCEL.EXE	rundll32.exe
PID 1108 wrote to memory of 3004	1108	EXCEL.EXE	rundll32.exe
PID 1108 wrote to memory of 3004	1108	EXCEL.EXE	rundll32.exe
PID 1108 wrote to memory of 3748	1108	EXCEL.EXE	rundll32.exe
PID 1108 wrote to memory of 3748	1108	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-2065399866-05132021.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:1108

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:908

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3004

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\lertio.cersw2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3748

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/908-179-0x0000000000000000-mapping.dmp

Download
memory/1108-114-0x00007FF7086F0000-0x00007FF70BCA6000-memory.dmp

Filesize
53.7MB

Download
memory/1108-115-0x00007FFC3AEC0000-0x00007FFC3AED0000-memory.dmp

Filesize
64KB

Download
memory/1108-116-0x00007FFC3AEC0000-0x00007FFC3AED0000-memory.dmp

Filesize
64KB

Download
memory/1108-117-0x00007FFC3AEC0000-0x00007FFC3AED0000-memory.dmp

Filesize
64KB

Download
memory/1108-118-0x00007FFC3AEC0000-0x00007FFC3AED0000-memory.dmp

Filesize
64KB

Download
memory/1108-119-0x00007FFC3AEC0000-0x00007FFC3AED0000-memory.dmp

Filesize
64KB

Download
memory/1108-122-0x00007FFC5B6E0000-0x00007FFC5C7CE000-memory.dmp

Filesize
16.9MB

Download
memory/1108-123-0x00007FFC597E0000-0x00007FFC5B6D5000-memory.dmp

Filesize
31.0MB

Download
memory/3004-180-0x0000000000000000-mapping.dmp

Download
memory/3748-181-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads