88d07eac813b81a446e976b9d46feb95a86d3e4d0cdfb6e604d42bba8757db02

General

Target
SecuriteInfo.com.Trojan.Agent.FRJZ.25358.23376.xlsm
Size 83KB
Sample220114-bzsnladfe6
SHA256 88d07eac813b81a446e976b9d46feb95a86d3e4d0cdfb6e604d42bba8757db02
MD5 db0558d5d799fc17e8f261d816c23ecf
SHA1 9b78c7cdb15da008f1df100692316c780140dd1c
SHA512 f5f33069c1df5f6badf45aca699c14605eb6d9c5d0bc1fa1ee9b2284dd78376a31d6a8e757bf7c4dcf6a26edfc4a52534ae3e5b1df3e3db72defa86bdfe4003a
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://robotically.xyz/wp-content/XtKkx/

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	3568	2580	rundll32.exe	67

Blocklisted process makes network request 3 IoCs

flow	pid	Process
41	1500	rundll32.exe
42	1500	rundll32.exe
44	1500	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
3568	rundll32.exe
3808	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Sfryyrexbsb\zljeiop.yqq	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	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
2580	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1500	rundll32.exe
1500	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE
2580	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2580 wrote to memory of 3568	2580	EXCEL.EXE	70
PID 2580 wrote to memory of 3568	2580	EXCEL.EXE	70
PID 2580 wrote to memory of 3568	2580	EXCEL.EXE	70
PID 3568 wrote to memory of 3808	3568	rundll32.exe	72
PID 3568 wrote to memory of 3808	3568	rundll32.exe	72
PID 3568 wrote to memory of 3808	3568	rundll32.exe	72
PID 3808 wrote to memory of 2292	3808	rundll32.exe	73
PID 3808 wrote to memory of 2292	3808	rundll32.exe	73
PID 3808 wrote to memory of 2292	3808	rundll32.exe	73
PID 2292 wrote to memory of 1500	2292	rundll32.exe	74
PID 2292 wrote to memory of 1500	2292	rundll32.exe	74
PID 2292 wrote to memory of 1500	2292	rundll32.exe	74

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.25358.23376.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2580
- 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:3568
- - 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:3808
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Sfryyrexbsb\zljeiop.yqq",LEtrJZlDJwKKEEI
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2292
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Sfryyrexbsb\zljeiop.yqq",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:1500

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/2580-118-0x00007FFEFF1F0000-0x00007FFEFF200000-memory.dmp

Download

memory/2580-121-0x00000144A4320000-0x00000144A4322000-memory.dmp

Download

memory/2580-122-0x00000144A4320000-0x00000144A4322000-memory.dmp

Download

memory/2580-120-0x00000144A4320000-0x00000144A4322000-memory.dmp

Download

memory/2580-119-0x00007FFEFF1F0000-0x00007FFEFF200000-memory.dmp

Download

memory/2580-115-0x00007FFEFF1F0000-0x00007FFEFF200000-memory.dmp

Download

memory/2580-117-0x00007FFEFF1F0000-0x00007FFEFF200000-memory.dmp

Download

memory/2580-116-0x00007FFEFF1F0000-0x00007FFEFF200000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads