a49399789b01cd98a86c1e039af45a87a2c9ec07d14956bb189152912239bc4c

General

Target

a49399789b01cd98a86c1e039af45a87a2c9ec07d14956bb189152912239bc4c.xlsm
Size

83KB
MD5

11754de7790b7597ab40d15a942dd0ee
SHA1

c2bdc2086bead5dcaae04d46937171cb0c9a9076
SHA256

a49399789b01cd98a86c1e039af45a87a2c9ec07d14956bb189152912239bc4c
SHA512

d7918d2e4ca28af4d0fdcbc29bd1f2cddfcca829e4f85da4bff3210bccecd55e7e411f4b99699d7db8b0349bec51af62b7f936471cbe427d1908aa95cdf9f834

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.

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	1116	3732	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

43 456 rundll32.exe
46 456 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

1116 rundll32.exe
804 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Fpewzjgmvawnln\wpawjnokekrm.pfy 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
43	456	rundll32.exe
46	456	rundll32.exe

pid	process
1116	rundll32.exe
804	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Fpewzjgmvawnln\wpawjnokekrm.pfy	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

3732 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

456 rundll32.exe
456 rundll32.exe

pid	process
456	rundll32.exe
456	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE
3732	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 3732 wrote to memory of 1116	3732	EXCEL.EXE	rundll32.exe
PID 3732 wrote to memory of 1116	3732	EXCEL.EXE	rundll32.exe
PID 3732 wrote to memory of 1116	3732	EXCEL.EXE	rundll32.exe
PID 1116 wrote to memory of 804	1116	rundll32.exe	rundll32.exe
PID 1116 wrote to memory of 804	1116	rundll32.exe	rundll32.exe
PID 1116 wrote to memory of 804	1116	rundll32.exe	rundll32.exe
PID 804 wrote to memory of 1332	804	rundll32.exe	rundll32.exe
PID 804 wrote to memory of 1332	804	rundll32.exe	rundll32.exe
PID 804 wrote to memory of 1332	804	rundll32.exe	rundll32.exe
PID 1332 wrote to memory of 456	1332	rundll32.exe	rundll32.exe
PID 1332 wrote to memory of 456	1332	rundll32.exe	rundll32.exe
PID 1332 wrote to memory of 456	1332	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\a49399789b01cd98a86c1e039af45a87a2c9ec07d14956bb189152912239bc4c.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3732

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:1116

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:804

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Fpewzjgmvawnln\wpawjnokekrm.pfy",RTnFkrIM
4⤵
- Suspicious use of WriteProcessMemory
PID:1332

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Fpewzjgmvawnln\wpawjnokekrm.pfy",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:456

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

3

T1082

Query Registry

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\wxeu.ocx
MD5
efe28579be6053eb56d65ce47a28e4ac

SHA1
8a5e59024578533eaa6d8d757cd7e0fdeb90ee15

SHA256
bb6109acc2b7474d53e223a5756822fb77b8b7495af31ffdeb90dd2e8584e17b

SHA512
1842b7aaf4e9404c2228f61c7325cb2aa1b3759dcd7eb0adee52270badf3ac6b6459815627eab8c80aef8a1ea73b089da703671758aedb2da026edc132002811

Download Submit
\Users\Admin\wxeu.ocx
MD5
efe28579be6053eb56d65ce47a28e4ac

SHA1
8a5e59024578533eaa6d8d757cd7e0fdeb90ee15

SHA256
bb6109acc2b7474d53e223a5756822fb77b8b7495af31ffdeb90dd2e8584e17b

SHA512
1842b7aaf4e9404c2228f61c7325cb2aa1b3759dcd7eb0adee52270badf3ac6b6459815627eab8c80aef8a1ea73b089da703671758aedb2da026edc132002811

Download Submit
\Users\Admin\wxeu.ocx
MD5
efe28579be6053eb56d65ce47a28e4ac

SHA1
8a5e59024578533eaa6d8d757cd7e0fdeb90ee15

SHA256
bb6109acc2b7474d53e223a5756822fb77b8b7495af31ffdeb90dd2e8584e17b

SHA512
1842b7aaf4e9404c2228f61c7325cb2aa1b3759dcd7eb0adee52270badf3ac6b6459815627eab8c80aef8a1ea73b089da703671758aedb2da026edc132002811

Download Submit
memory/456-287-0x0000000000000000-mapping.dmp

Download
memory/804-268-0x0000000000000000-mapping.dmp

Download
memory/1116-263-0x0000000000000000-mapping.dmp

Download
memory/1332-282-0x0000000000000000-mapping.dmp

Download
memory/3732-121-0x00007FF9FB330000-0x00007FF9FB340000-memory.dmp

Filesize
64KB

Download
memory/3732-130-0x00007FF9F7A00000-0x00007FF9F7A10000-memory.dmp

Filesize
64KB

Download
memory/3732-131-0x00007FF9F7A00000-0x00007FF9F7A10000-memory.dmp

Filesize
64KB

Download
memory/3732-124-0x000002AEA2990000-0x000002AEA2992000-memory.dmp

Filesize
8KB

Download
memory/3732-123-0x000002AEA2990000-0x000002AEA2992000-memory.dmp

Filesize
8KB

Download
memory/3732-122-0x000002AEA2990000-0x000002AEA2992000-memory.dmp

Filesize
8KB

Download
memory/3732-117-0x00007FF9FB330000-0x00007FF9FB340000-memory.dmp

Filesize
64KB

Download
memory/3732-120-0x00007FF9FB330000-0x00007FF9FB340000-memory.dmp

Filesize
64KB

Download
memory/3732-119-0x00007FF9FB330000-0x00007FF9FB340000-memory.dmp

Filesize
64KB

Download
memory/3732-118-0x00007FF9FB330000-0x00007FF9FB340000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads