ee30cd836329c2da9a0409babf00481912e8612435f215adc4e355bb3bc5c943

General

Target

2013年上学生住宿信息公示/文化艺术部部住校生意向表.xls
Size

260KB
MD5

38d711ad89627fd7045b1e9f90254406
SHA1

cc1f3800840aa1f9498c1cefb8edf3f044cce171
SHA256

1bd0caf3cec1eeb412db45f0b242375118f7c3356e540334eeee89d70fc4d379
SHA512

cad23fd4390d3aa271d6c0432b765f157e93616d9423848e13bbfb4aa02add44ecf2b19e5dbda1b7199228d485da72fdf1fa49603ffa9c4f5d1671bf5c09a1e1
SSDEEP

3072:l90RCuHF9XzI4QHAawFg4KQX0Gy2jcc0lbxOK103L3FoJtXw8S:H08WHzTY1EgpQX0G3L3Y

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:

cmd.execmd.execmd.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	4212	2296	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	984	2296	cmd.exe	EXCEL.EXE
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2688	2296	cmd.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

2296 EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	process
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE
2296	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 2296 wrote to memory of 4212	2296	EXCEL.EXE	cmd.exe
PID 2296 wrote to memory of 4212	2296	EXCEL.EXE	cmd.exe
PID 2296 wrote to memory of 984	2296	EXCEL.EXE	cmd.exe
PID 2296 wrote to memory of 984	2296	EXCEL.EXE	cmd.exe
PID 2296 wrote to memory of 2688	2296	EXCEL.EXE	cmd.exe
PID 2296 wrote to memory of 2688	2296	EXCEL.EXE	cmd.exe
PID 4212 wrote to memory of 3960	4212	cmd.exe	attrib.exe
PID 4212 wrote to memory of 3960	4212	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exe

pid process

3960 attrib.exe

pid	process
3960	attrib.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\2013年上学生住宿信息公示\文化艺术部部住校生意向表.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2296

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:4212

C:\Windows\system32\attrib.exe
attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
3⤵
- Views/modifies file attributes
PID:3960

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
PID:984

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
2⤵
- Process spawned unexpected child process
PID:2688

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Privilege Escalation

Defense Evasion

Hidden Files and Directories

1

T1158

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/984-140-0x0000000000000000-mapping.dmp

Download
memory/2296-138-0x00007FFDC1830000-0x00007FFDC1840000-memory.dmp

Filesize
64KB

Download
memory/2296-133-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-135-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-136-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-137-0x00007FFDC1830000-0x00007FFDC1840000-memory.dmp

Filesize
64KB

Download
memory/2296-132-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-147-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-134-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-146-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-145-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2296-144-0x00007FFDC3D50000-0x00007FFDC3D60000-memory.dmp

Filesize
64KB

Download
memory/2688-141-0x0000000000000000-mapping.dmp

Download
memory/3960-142-0x0000000000000000-mapping.dmp

Download
memory/4212-139-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads