a723d389559c3eba93eda9b9eff8b011d20977760c29a8dee9d20ec08e9821c6

General

Target

catalog-2021993845.xls
Size

367KB
MD5

d4a1987a3d939b4a5c37abdc8877b6f8
SHA1

cb526dcd9fae564a05ea4827fcfe5f4ef2df416a
SHA256

810b48a3bde92bbc6586baf358dd97aa25eebee9dd11e235d5862fd9d74ba6ba
SHA512

bd7f9a698897f6eb00f531c1b183dcf1faed276144bc9f44e05e533714e18791a7c661df528dde027c6e4e80b24e013fecfc6793c7dfa6115ac80da97398755f

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 2 IoCs

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

Processes:

rundll32.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	516	4436	rundll32.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	596	4436	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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

4436 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE
4436	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 4436 wrote to memory of 516	4436	EXCEL.EXE	rundll32.exe
PID 4436 wrote to memory of 516	4436	EXCEL.EXE	rundll32.exe
PID 4436 wrote to memory of 596	4436	EXCEL.EXE	rundll32.exe
PID 4436 wrote to memory of 596	4436	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\catalog-2021993845.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4436

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:516

C:\Windows\SYSTEM32\rundll32.exe
rundll32 ..\tuti.rut1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:596

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/516-179-0x0000000000000000-mapping.dmp

Download
memory/596-180-0x0000000000000000-mapping.dmp

Download
memory/4436-114-0x00007FF774220000-0x00007FF7777D6000-memory.dmp

Filesize
53.7MB

Download
memory/4436-115-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4436-116-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4436-117-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4436-118-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4436-122-0x00007FF9B4570000-0x00007FF9B4580000-memory.dmp

Filesize
64KB

Download
memory/4436-121-0x00007FF9D4F80000-0x00007FF9D606E000-memory.dmp

Filesize
16.9MB

Download
memory/4436-123-0x00007FF9D3080000-0x00007FF9D4F75000-memory.dmp

Filesize
31.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads