8de4c5b9bc7d488fbc48d117b2334e77d59d4e88255b3115a24ec31e3999f776

General

Target
SecuriteInfo.com.Trojan.Agent.FRJZ.4911.1584.xlsm
Size 83KB
Sample220114-ea4w4seah3
SHA256 8de4c5b9bc7d488fbc48d117b2334e77d59d4e88255b3115a24ec31e3999f776
MD5 7dbac99466fd55da61a4242656600fff
SHA1 c9cd19d970e026ba2380359a52af0226d2789f08
SHA512 77c7981892caa47c720527c01d9928e37bbcaa61c455bb3e25b5fdaec5733d40c13e6173ea459eb74eedcbef85695f6aca1af5c5261e491c3af16deebfcdd9ef
MD5 SHA1 SHA512

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper
http://shopnhap.com/highbinder/UedVfTHDf5Em40/

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	1912	2632	rundll32.exe	67

Blocklisted process makes network request 3 IoCs

flow	pid	Process
36	3780	rundll32.exe
37	3780	rundll32.exe
38	3780	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1912	rundll32.exe
2188	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Hzbxvf\tchrzyz.gkd	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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2632	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3780	rundll32.exe
3780	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE
2632	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 1912	2632	EXCEL.EXE	71
PID 2632 wrote to memory of 1912	2632	EXCEL.EXE	71
PID 2632 wrote to memory of 1912	2632	EXCEL.EXE	71
PID 1912 wrote to memory of 2188	1912	rundll32.exe	72
PID 1912 wrote to memory of 2188	1912	rundll32.exe	72
PID 1912 wrote to memory of 2188	1912	rundll32.exe	72
PID 2188 wrote to memory of 2544	2188	rundll32.exe	73
PID 2188 wrote to memory of 2544	2188	rundll32.exe	73
PID 2188 wrote to memory of 2544	2188	rundll32.exe	73
PID 2544 wrote to memory of 3780	2544	rundll32.exe	74
PID 2544 wrote to memory of 3780	2544	rundll32.exe	74
PID 2544 wrote to memory of 3780	2544	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.4911.1584.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2632
- 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:1912
- - 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:2188
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Hzbxvf\tchrzyz.gkd",bMYyU
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2544
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Hzbxvf\tchrzyz.gkd",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:3780

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/2632-118-0x00007FFB04400000-0x00007FFB04410000-memory.dmp

Download

memory/2632-122-0x000001A989030000-0x000001A989032000-memory.dmp

Download

memory/2632-121-0x00007FFB04400000-0x00007FFB04410000-memory.dmp

Download

memory/2632-120-0x000001A989030000-0x000001A989032000-memory.dmp

Download

memory/2632-119-0x000001A989030000-0x000001A989032000-memory.dmp

Download

memory/2632-115-0x00007FFB04400000-0x00007FFB04410000-memory.dmp

Download

memory/2632-117-0x00007FFB04400000-0x00007FFB04410000-memory.dmp

Download

memory/2632-116-0x00007FFB04400000-0x00007FFB04410000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads