d49b40d468269f57fb87ea6ad7fd8bb303fbeb033dbd45fb4967c34c5dfbc2ed

Resubmissions

01-07-2021 09:56

210701-s1838vmwln 10

22-02-2021 19:14

210222-ylxjnqkw4n 10

Analysis

max time kernel
541s
max time network
519s
platform
windows10_x64
resource
win10v20210410
submitted
01-07-2021 09:56

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Report Analysis Logs

General

Target

document-550193913.xls
Size

91KB
MD5

4107cd071635b4cc3689f77c688f57c3
SHA1

cf6dea64431b614757906f32d3d1f016b5afdbb5
SHA256

d49b40d468269f57fb87ea6ad7fd8bb303fbeb033dbd45fb4967c34c5dfbc2ed
SHA512

ae568d93ef0c9cea430e18bdf5a27cb5e71fe2e13cfca9c508f196aead42d7a1e68dd863587a0549391b7c08af85de9e6db574c9d819422482ed6529df52c0fb

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

https://helendunnosteopathy.co.uk/ds/2202.gif

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	1924	3212	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

3212 EXCEL.EXE
Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

EXCEL.EXE

pid process

3212 EXCEL.EXE
3212 EXCEL.EXE

Suspicious use of SetWindowsHookEx 15 IoCs

Processes:

EXCEL.EXE

pid	process
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE
3212	EXCEL.EXE

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 3212 wrote to memory of 1924	3212	EXCEL.EXE	rundll32.exe
PID 3212 wrote to memory of 1924	3212	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\document-550193913.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:3212

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\rieuro.vnt,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1924

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/1924-179-0x0000000000000000-mapping.dmp

Download
memory/3212-114-0x00007FF668F00000-0x00007FF66C4B6000-memory.dmp

Filesize
53.7MB

Download
memory/3212-115-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-116-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-117-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-118-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-119-0x00007FF8383E0000-0x00007FF8383F0000-memory.dmp

Filesize
64KB

Download
memory/3212-122-0x00007FF858F10000-0x00007FF859FFE000-memory.dmp

Filesize
16.9MB

Download
memory/3212-123-0x00000164968D0000-0x00000164987C5000-memory.dmp

Filesize
31.0MB

Download