2b25518c74a4620e944ebbb70b30787175d702d7c2b9dab5072d25bda750f042

General

Target

2b25518c74a4620e944ebbb70b30787175d702d7c2b9dab5072d25bda750f042.xlsm
Size

83KB
MD5

baf7962be614881a29bb12bb46efdc7a
SHA1

63c0776962828909db62eebf5522025c598f8aa9
SHA256

2b25518c74a4620e944ebbb70b30787175d702d7c2b9dab5072d25bda750f042
SHA512

2fb080300a6ec49bac81b8cef11b809d1ee2d19511a7b83feaab7c576fa7e7e025899a201cd4b624625dc6e0fd9a0988fbe2a7f85cf0da12633d7b9d00c1c62f

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://therecyclingmachine.com/wp-admin/LzpOZSlkq90fYT1/

xlm40.dropper

http://zhongmaifangwu.com/TEST777/3U4Un0u/

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process	4072	2144	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

45 2100 rundll32.exe
46 2100 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

4072 rundll32.exe
2860 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Kypnsphe\rgrcsbg.qjz rundll32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

flow	pid	process
45	2100	rundll32.exe
46	2100	rundll32.exe

pid	process
4072	rundll32.exe
2860	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Kypnsphe\rgrcsbg.qjz	rundll32.exe

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXE

pid process

2144 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

2100 rundll32.exe
2100 rundll32.exe

pid	process
2100	rundll32.exe
2100	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE
2144	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 2144 wrote to memory of 4072	2144	EXCEL.EXE	rundll32.exe
PID 2144 wrote to memory of 4072	2144	EXCEL.EXE	rundll32.exe
PID 2144 wrote to memory of 4072	2144	EXCEL.EXE	rundll32.exe
PID 4072 wrote to memory of 2860	4072	rundll32.exe	rundll32.exe
PID 4072 wrote to memory of 2860	4072	rundll32.exe	rundll32.exe
PID 4072 wrote to memory of 2860	4072	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 328	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 328	2860	rundll32.exe	rundll32.exe
PID 2860 wrote to memory of 328	2860	rundll32.exe	rundll32.exe
PID 328 wrote to memory of 2100	328	rundll32.exe	rundll32.exe
PID 328 wrote to memory of 2100	328	rundll32.exe	rundll32.exe
PID 328 wrote to memory of 2100	328	rundll32.exe	rundll32.exe

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\2b25518c74a4620e944ebbb70b30787175d702d7c2b9dab5072d25bda750f042.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2144
- C:\Windows\SysWow64\rundll32.exe
  C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
  2⤵
  - Process spawned unexpected child process
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:4072
- - C:\Windows\SysWOW64\rundll32.exe
    C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
    3⤵
    - Loads dropped DLL
    - Drops file in System32 directory
    - Suspicious use of WriteProcessMemory
    PID:2860
  - - C:\Windows\SysWOW64\rundll32.exe
      C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Kypnsphe\rgrcsbg.qjz",ASQGkNKLk
      4⤵
      Suspicious use of WriteProcessMemory
      PID:328
    - - C:\Windows\SysWOW64\rundll32.exe
        
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Kypnsphe\rgrcsbg.qjz",DllRegisterServer
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        
        PID:2100

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

C:\Users\Admin\erum.ocx

MD5
735fe99587ce1c3253134d04126bb4da

SHA1
8ce444ef43824987f12da2269902843c6b732a92

SHA256
78a5b8de958d6635583691d5274b18731f7e9004167672ae0bac9415262e9ba9

SHA512
cf96f770bf87c7da18eaeaac11d587cad5c62f7f7ee7af00b020af308516e420cb3d840b8e41f2ba37e04546169e7e268836aa03dab0eb97d2afe70a0d7cba48

Download Submit
\Users\Admin\erum.ocx

MD5
735fe99587ce1c3253134d04126bb4da

SHA1
8ce444ef43824987f12da2269902843c6b732a92

SHA256
78a5b8de958d6635583691d5274b18731f7e9004167672ae0bac9415262e9ba9

SHA512
cf96f770bf87c7da18eaeaac11d587cad5c62f7f7ee7af00b020af308516e420cb3d840b8e41f2ba37e04546169e7e268836aa03dab0eb97d2afe70a0d7cba48

Download Submit
\Users\Admin\erum.ocx

MD5
735fe99587ce1c3253134d04126bb4da

SHA1
8ce444ef43824987f12da2269902843c6b732a92

SHA256
78a5b8de958d6635583691d5274b18731f7e9004167672ae0bac9415262e9ba9

SHA512
cf96f770bf87c7da18eaeaac11d587cad5c62f7f7ee7af00b020af308516e420cb3d840b8e41f2ba37e04546169e7e268836aa03dab0eb97d2afe70a0d7cba48

Download Submit
memory/328-276-0x0000000000000000-mapping.dmp

Download
memory/2100-281-0x0000000000000000-mapping.dmp

Download
memory/2144-118-0x00007FF909EF0000-0x00007FF909F00000-memory.dmp

Filesize
64KB

Download
memory/2144-121-0x00000258B6DE0000-0x00000258B6DE2000-memory.dmp

Filesize
8KB

Download
memory/2144-122-0x00000258B6DE0000-0x00000258B6DE2000-memory.dmp

Filesize
8KB

Download
memory/2144-120-0x00000258B6DE0000-0x00000258B6DE2000-memory.dmp

Filesize
8KB

Download
memory/2144-119-0x00007FF909EF0000-0x00007FF909F00000-memory.dmp

Filesize
64KB

Download
memory/2144-115-0x00007FF909EF0000-0x00007FF909F00000-memory.dmp

Filesize
64KB

Download
memory/2144-117-0x00007FF909EF0000-0x00007FF909F00000-memory.dmp

Filesize
64KB

Download
memory/2144-116-0x00007FF909EF0000-0x00007FF909F00000-memory.dmp

Filesize
64KB

Download
memory/2860-264-0x0000000000000000-mapping.dmp

Download
memory/4072-259-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads