bb86b8d034ba6e5a3ede0a2c1056ddb735fe6a8cadc930e848d2f8072cfc38e4

Analysis

max time kernel
136s
max time network
130s
platform
windows10_x64
resource
win10v20201028
submitted
14-01-2021 16:18

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General

Target

bb86b8d034ba6e5a3ede0a2c1056ddb735fe6a8cadc930e848d2f8072cfc38e4.xls
Size

54KB
MD5

632e0ca8ac2427b22123d2647d9396d9
SHA1

d07696501ab622c8c251e37d7c6e5311e63e9e47
SHA256

bb86b8d034ba6e5a3ede0a2c1056ddb735fe6a8cadc930e848d2f8072cfc38e4
SHA512

ce21264ada7ed164cc3b0bc72c3371a2f4d0782ea4fc2bdddb828e4096532c2b8a3d3bbbd866eacda52ad1398620957bd74a1bba1f02254cbe652aefab57b911

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

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

Processes:

rundll32.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	3088	4648	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

4648 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

4648 EXCEL.EXE
4648 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE
4648	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4648 wrote to memory of 3088	4648	EXCEL.EXE	rundll32.exe
PID 4648 wrote to memory of 3088	4648	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\bb86b8d034ba6e5a3ede0a2c1056ddb735fe6a8cadc930e848d2f8072cfc38e4.xls"
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:4648

C:\Windows\SYSTEM32\rundll32.exe
rundll32 C:\IntelCompany\JIOLAS.RRTTOOKK,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:3088

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/3088-3-0x0000000000000000-mapping.dmp

Download
memory/4648-2-0x00007FFBDF900000-0x00007FFBDFF37000-memory.dmp

Filesize
6.2MB

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