c9a3300d453b49ea41ff4ceb73f52d67bce3361c38544dd461c146a3ebcf995b

General

Target
SecuriteInfo.com.Trojan.Agent.FRJZ.5659.28079.xlsm
Size 83KB
Sample220114-e7p48aeedm
SHA256 c9a3300d453b49ea41ff4ceb73f52d67bce3361c38544dd461c146a3ebcf995b
MD5 54b111eda70d930ca35cfed4f1cb64eb
SHA1 5251df7903d85af9753f005ede619f58a88297a1
SHA512 dc30c957fad387980b2b360627ad949dc111f851555864d6cea1adaefd2ce083e89ffd3ac672d85a5ff068e9beb95238d9da9a6e6f47bb0f45f28a739d3ab153
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	1388	1204	rundll32.exe	68

Blocklisted process makes network request 2 IoCs

flow	pid	Process
42	1544	rundll32.exe
43	1544	rundll32.exe

Downloads MZ/PE file

Loads dropped DLL 2 IoCs

pid	Process
1388	rundll32.exe
3084	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Xttrsvhso\nzhemfvqhh.fss	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
1204	EXCEL.EXE

Suspicious use of SetWindowsHookEx 12 IoCs

pid	Process
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE
1204	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1204 wrote to memory of 1388	1204	EXCEL.EXE	71
PID 1204 wrote to memory of 1388	1204	EXCEL.EXE	71
PID 1204 wrote to memory of 1388	1204	EXCEL.EXE	71
PID 1388 wrote to memory of 3084	1388	rundll32.exe	72
PID 1388 wrote to memory of 3084	1388	rundll32.exe	72
PID 1388 wrote to memory of 3084	1388	rundll32.exe	72
PID 3084 wrote to memory of 2176	3084	rundll32.exe	73
PID 3084 wrote to memory of 2176	3084	rundll32.exe	73
PID 3084 wrote to memory of 2176	3084	rundll32.exe	73
PID 2176 wrote to memory of 1544	2176	rundll32.exe	74
PID 2176 wrote to memory of 1544	2176	rundll32.exe	74
PID 2176 wrote to memory of 1544	2176	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.5659.28079.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1204
- 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:1388
- - 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:3084
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Xttrsvhso\nzhemfvqhh.fss",yBYFlvQCuTctbB
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2176
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Xttrsvhso\nzhemfvqhh.fss",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        
        PID:1544

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/1204-120-0x000001F4D17D0000-0x000001F4D17D2000-memory.dmp

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memory/1204-116-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

Download

memory/1204-119-0x000001F4D17D0000-0x000001F4D17D2000-memory.dmp

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memory/1204-121-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

Download

memory/1204-122-0x000001F4D17D0000-0x000001F4D17D2000-memory.dmp

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memory/1204-128-0x00007FF89A3C0000-0x00007FF89A3D0000-memory.dmp

Download

memory/1204-129-0x00007FF89A3C0000-0x00007FF89A3D0000-memory.dmp

Download

memory/1204-115-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

Download

memory/1204-118-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

Download

memory/1204-117-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads