f621eab82e404316c476c37ebd55ea56d3174760b11920135b45cdb8b85fd7df

General

Target

f621eab82e404316c476c37ebd55ea56d3174760b11920135b45cdb8b85fd7df.xls
Size

269KB
MD5

8acced8e2d850e1a011c892071fb99fb
SHA1

3a8e771fe40d69229a8687e029ea1c0e04574455
SHA256

f621eab82e404316c476c37ebd55ea56d3174760b11920135b45cdb8b85fd7df
SHA512

6c18b9cf9171c717c6bbba1f4d4e84ad98fa874ea4fd85778ce86b303e888e4e71ae7469e08ce0f417e65db9a167c76c0c60af5e739446536ebae725fe307483
SSDEEP

3072:CmeFShLJyxPgyMG3YEGLUz6z6Ty25P8V75Sz+vR3MPXXvpMI1JSWVbFQdzQ7ITk1:CmeFMyxPSG3YdLUpP8rjgNTXjc

Score

10^/10

defense_evasion macro xlm

Malware Config

Signatures

Process spawned unexpected child process 3 IoCs

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

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2916	2760	cmd.exe	82
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	916	2760	cmd.exe	82
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2748	2760	cmd.exe	82

Suspicious Office macro 1 IoCs

Office document equipped with 4.0 macros.

macro xlm

resource	yara_rule
behavioral2/files/0x000d000000023b7f-100.dat	office_xlm_macros

Deletes itself 1 IoCs

pid	Process
2760	EXCEL.EXE

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

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

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

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

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\59B75E00\:Zone.Identifier:$DATA	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2760	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2760	EXCEL.EXE
2760	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE
2760	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 5016	2760	EXCEL.EXE	88
PID 2760 wrote to memory of 5016	2760	EXCEL.EXE	88
PID 2760 wrote to memory of 2748	2760	EXCEL.EXE	90
PID 2760 wrote to memory of 2748	2760	EXCEL.EXE	90
PID 2760 wrote to memory of 916	2760	EXCEL.EXE	91
PID 2760 wrote to memory of 916	2760	EXCEL.EXE	91
PID 2760 wrote to memory of 2916	2760	EXCEL.EXE	92
PID 2760 wrote to memory of 2916	2760	EXCEL.EXE	92
PID 2748 wrote to memory of 1468	2748	cmd.exe	96
PID 2748 wrote to memory of 1468	2748	cmd.exe	96

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1468	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\f621eab82e404316c476c37ebd55ea56d3174760b11920135b45cdb8b85fd7df.xls"
1⤵
- Deletes itself
- Checks processor information in registry
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2760
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:5016
- 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:2748
- - C:\Windows\system32\attrib.exe
    attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"
    3⤵
    - Views/modifies file attributes
    PID:1468
- 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:916
- 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:2916

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
1⤵
PID:3768

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

1

T1564

Hidden Files and Directories

1

T1564.001

Indicator Removal

1

T1070

File Deletion

1

T1070.004

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

C:\Users\Admin\AppData\Local\Temp\f621eab82e404316c476c37ebd55ea56d3174760b11920135b45cdb8b85fd7df.xls

Filesize
293KB

MD5
01e5b6465c74f97cb61836bc53b2bf6c

SHA1
c1b78ed6a1f6b1dbb733b322da26970cf85f69f0

SHA256
c41773e491bdab7989c0bc6df10a5820591b1129ee40953ae14dcc21acb999e7

SHA512
40d9ef9a22a32907af37d8f5f2353dc6826af3374904f750519848b144142c762c7337e7076dfb11e7395290fe8599eaf8c94210fbc473622f74d791e0775e53

Download Submit
memory/2760-14-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-102-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-2-0x00007FFA179D0000-0x00007FFA179E0000-memory.dmp

Filesize
64KB

Download
memory/2760-5-0x00007FFA179D0000-0x00007FFA179E0000-memory.dmp

Filesize
64KB

Download
memory/2760-4-0x00007FFA179D0000-0x00007FFA179E0000-memory.dmp

Filesize
64KB

Download
memory/2760-7-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-10-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-9-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-8-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-6-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-11-0x00007FFA15970000-0x00007FFA15980000-memory.dmp

Filesize
64KB

Download
memory/2760-1-0x00007FFA579ED000-0x00007FFA579EE000-memory.dmp

Filesize
4KB

Download
memory/2760-3-0x00007FFA179D0000-0x00007FFA179E0000-memory.dmp

Filesize
64KB

Download
memory/2760-16-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-15-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-21-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-20-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-18-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-19-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-13-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-12-0x00007FFA15970000-0x00007FFA15980000-memory.dmp

Filesize
64KB

Download
memory/2760-0-0x00007FFA179D0000-0x00007FFA179E0000-memory.dmp

Filesize
64KB

Download
memory/2760-17-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-103-0x00007FFA579ED000-0x00007FFA579EE000-memory.dmp

Filesize
4KB

Download
memory/2760-104-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download
memory/2760-105-0x00007FFA57950000-0x00007FFA57B45000-memory.dmp

Filesize
2.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads