3fbe10e0cd5ce03f9783b908b0706d66253ff1e30dd77f6435ed360a43c69e4d

General

Target

subscription_1615866472.xlsb
Size

279KB
MD5

07571645cfa9005361c68f1d84975550
SHA1

b9020bd1ae5f35489a288f2e5aa7c068e08d540d
SHA256

ee9ba17fb42f85ed79f5a9f15673327579538de8eb268ea134b97bff3f54c44c
SHA512

3345b205c17240f5d11265491de01530e99ae37b4d7f3ae482bd09f23e184bba5c109b027dc56fa3b8ff331eca999b69571cf2fba1adb39ddcee64fd55f30fe7

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 2 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	3948	508	certutil.exe	68
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	504	508	rundll32.exe	68

Blocklisted process makes network request 1 IoCs

flow	pid	Process
30	3824	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
3824	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3844	3824	WerFault.exe	83

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
508	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe
3844	WerFault.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	3844	WerFault.exe
Token: SeBackupPrivilege	3844	WerFault.exe
Token: SeDebugPrivilege	3844	WerFault.exe

Suspicious use of SetWindowsHookEx 18 IoCs

pid	Process
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE
508	EXCEL.EXE

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 508 wrote to memory of 3948	508	EXCEL.EXE	79
PID 508 wrote to memory of 3948	508	EXCEL.EXE	79
PID 508 wrote to memory of 504	508	EXCEL.EXE	82
PID 508 wrote to memory of 504	508	EXCEL.EXE	82
PID 504 wrote to memory of 3824	504	rundll32.exe	83
PID 504 wrote to memory of 3824	504	rundll32.exe	83
PID 504 wrote to memory of 3824	504	rundll32.exe	83

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\subscription_1615866472.xlsb"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:508
- C:\Windows\System32\certutil.exe
  "C:\Windows\System32\certutil.exe" -decode C:\Users\Public\jahi1914.png C:\Users\Public\jahi1914.pn
  2⤵
  - Process spawned unexpected child process
  PID:3948
- C:\Windows\System32\rundll32.exe
  "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1914.pn,DF j1
  2⤵
  - Process spawned unexpected child process
  - Suspicious use of WriteProcessMemory
  PID:504
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\System32\rundll32.exe" C:\Users\Public\jahi1914.pn,DF j1
    3⤵
    - Blocklisted process makes network request
    - Loads dropped DLL
    PID:3824
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3824 -s 908
      4⤵
      Program crash
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/508-117-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-122-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-121-0x00007FF96F700000-0x00007FF9707EE000-memory.dmp

Filesize
16.9MB

Download
memory/508-123-0x000001AB00000000-0x000001AB01EF5000-memory.dmp

Filesize
31.0MB

Download
memory/508-118-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-114-0x00007FF79CD30000-0x00007FF7A02E6000-memory.dmp

Filesize
53.7MB

Download
memory/508-116-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/508-115-0x00007FF94EEB0000-0x00007FF94EEC0000-memory.dmp

Filesize
64KB

Download
memory/3824-185-0x0000000000490000-0x000000000053E000-memory.dmp

Filesize
696KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads