2fc9fd3ba89f4bc0b34597521c727dcfcb1106c18791c1ec25de7ba55a6dd317

General

Target

CompensationClaim_1729801533_03122021.xls
Size

280KB
MD5

21ecbc98f12c0adf8d48d35ace2deb89
SHA1

59c762ee1205a475622c6994d912240005909dcb
SHA256

2fc9fd3ba89f4bc0b34597521c727dcfcb1106c18791c1ec25de7ba55a6dd317
SHA512

71c20443aac41a27ed344f693dd697cd075650d3444ce833287006b8cd27ea078bbab441c0e95934117c17709e9a81a3f29f35759508188590d7fc2a0122d87b

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	4004	1456	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	640	1456	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	1220	1456	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

1456 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE
1456	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1456 wrote to memory of 4004	1456	EXCEL.EXE	rundll32.exe
PID 1456 wrote to memory of 4004	1456	EXCEL.EXE	rundll32.exe
PID 1456 wrote to memory of 640	1456	EXCEL.EXE	rundll32.exe
PID 1456 wrote to memory of 640	1456	EXCEL.EXE	rundll32.exe
PID 1456 wrote to memory of 1220	1456	EXCEL.EXE	rundll32.exe
PID 1456 wrote to memory of 1220	1456	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\CompensationClaim_1729801533_03122021.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1456

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Runtim.broks,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:4004

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Runtim.broks1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:640

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\Runtim.broks2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1220

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

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Downloads

memory/640-8-0x0000000000000000-mapping.dmp

Download
memory/1220-9-0x0000000000000000-mapping.dmp

Download
memory/1456-2-0x00007FFB33400000-0x00007FFB33410000-memory.dmp

Filesize
64KB

Download
memory/1456-3-0x00007FFB33400000-0x00007FFB33410000-memory.dmp

Filesize
64KB

Download
memory/1456-4-0x00007FFB33400000-0x00007FFB33410000-memory.dmp

Filesize
64KB

Download
memory/1456-5-0x00007FFB33400000-0x00007FFB33410000-memory.dmp

Filesize
64KB

Download
memory/1456-6-0x00007FFB568F0000-0x00007FFB56F27000-memory.dmp

Filesize
6.2MB

Download
memory/4004-7-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads