9bbdbbf2e16c8304a30bc12313362864d0b4611b6b5564e5fa4efeb559c9a4c6

General

Target
SecuriteInfo.com.Trojan.Agent.FRJZ.31437.17495.xlsm
Size 83KB
Sample220114-jhj9wsfaa5
SHA256 9bbdbbf2e16c8304a30bc12313362864d0b4611b6b5564e5fa4efeb559c9a4c6
MD5 4fc26b450466686d1d05b08fc8b0b3ee
SHA1 e29e8bc3988a48c7944e3b8d934b51060efc555a
SHA512 92c28279a27e4271f9029fad8dac95c407fb143f637385e7d2b914fe816ed53c53c3e698d066a3df6b156b61b053ec13795bb86b5255c6d3e014e3caf3b07bcc
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://adi.iswks.com/assets/hO1v71pqfNN/

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	1952	3436	rundll32.exe	68

Blocklisted process makes network request 2 IoCs

flow	pid	Process
44	1504	rundll32.exe
45	1504	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1952	rundll32.exe
1064	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Ivbjutymkmg\dibx.qyc	rundll32.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 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
3436	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1504	rundll32.exe
1504	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE
3436	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3436 wrote to memory of 1952	3436	EXCEL.EXE	70
PID 3436 wrote to memory of 1952	3436	EXCEL.EXE	70
PID 3436 wrote to memory of 1952	3436	EXCEL.EXE	70
PID 1952 wrote to memory of 1064	1952	rundll32.exe	71
PID 1952 wrote to memory of 1064	1952	rundll32.exe	71
PID 1952 wrote to memory of 1064	1952	rundll32.exe	71
PID 1064 wrote to memory of 3304	1064	rundll32.exe	72
PID 1064 wrote to memory of 3304	1064	rundll32.exe	72
PID 1064 wrote to memory of 3304	1064	rundll32.exe	72
PID 3304 wrote to memory of 1504	3304	rundll32.exe	73
PID 3304 wrote to memory of 1504	3304	rundll32.exe	73
PID 3304 wrote to memory of 1504	3304	rundll32.exe	73

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Agent.FRJZ.31437.17495.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3436
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\wxeu.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\wxeu.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:1064
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Ivbjutymkmg\dibx.qyc",VnuiRmBurOl
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3304
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Ivbjutymkmg\dibx.qyc",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1504

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/3436-118-0x00007FF97BC30000-0x00007FF97BC40000-memory.dmp

Download

memory/3436-122-0x000001C77AD90000-0x000001C77AD92000-memory.dmp

Download

memory/3436-120-0x000001C77AD90000-0x000001C77AD92000-memory.dmp

Download

memory/3436-121-0x000001C77AD90000-0x000001C77AD92000-memory.dmp

Download

memory/3436-119-0x00007FF97BC30000-0x00007FF97BC40000-memory.dmp

Download

memory/3436-115-0x00007FF97BC30000-0x00007FF97BC40000-memory.dmp

Download

memory/3436-117-0x00007FF97BC30000-0x00007FF97BC40000-memory.dmp

Download

memory/3436-116-0x00007FF97BC30000-0x00007FF97BC40000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads