d8fd315efba4dd6e72aaf30eb91ac6bbdc046717708c740158751ebf6a9e18d4

General

Target

d8fd315efba4dd6e72aaf30eb91ac6bbdc046717708c740158751ebf6a9e18d4.xlsm
Size

83KB
MD5

1a834541b79e517d6901e2eb1c4941f0
SHA1

c301d1ee62a68af5af760c231900fc993dacabd8
SHA256

d8fd315efba4dd6e72aaf30eb91ac6bbdc046717708c740158751ebf6a9e18d4
SHA512

2e6996cc20f4de48d7d401ce451320b084959f5b040e62a4812777a20683839c990e452bf7ff0aacdff554684bd645c2a0487c5e7c9702050fa54e2fc5ce1409

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	2816	4088	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

45 2256 rundll32.exe
46 2256 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

2816 rundll32.exe
2872 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Ssanyotcnr\fwhvtvkmyywg.kuc 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	2256	rundll32.exe
46	2256	rundll32.exe

pid	process
2816	rundll32.exe
2872	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Ssanyotcnr\fwhvtvkmyywg.kuc	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 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

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

4088 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

2256 rundll32.exe
2256 rundll32.exe

pid	process
2256	rundll32.exe
2256	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE
4088	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 4088 wrote to memory of 2816	4088	EXCEL.EXE	rundll32.exe
PID 4088 wrote to memory of 2816	4088	EXCEL.EXE	rundll32.exe
PID 4088 wrote to memory of 2816	4088	EXCEL.EXE	rundll32.exe
PID 2816 wrote to memory of 2872	2816	rundll32.exe	rundll32.exe
PID 2816 wrote to memory of 2872	2816	rundll32.exe	rundll32.exe
PID 2816 wrote to memory of 2872	2816	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 1684	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 1684	2872	rundll32.exe	rundll32.exe
PID 2872 wrote to memory of 1684	2872	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 2256	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 2256	1684	rundll32.exe	rundll32.exe
PID 1684 wrote to memory of 2256	1684	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\d8fd315efba4dd6e72aaf30eb91ac6bbdc046717708c740158751ebf6a9e18d4.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4088

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:2816

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:2872

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Ssanyotcnr\fwhvtvkmyywg.kuc",gUMRUMVOzWJ
4⤵
- Suspicious use of WriteProcessMemory
PID:1684

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Ssanyotcnr\fwhvtvkmyywg.kuc",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:2256

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\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/1684-284-0x0000000000000000-mapping.dmp

Download
memory/2256-289-0x0000000000000000-mapping.dmp

Download
memory/2816-266-0x0000000000000000-mapping.dmp

Download
memory/2872-271-0x0000000000000000-mapping.dmp

Download
memory/4088-119-0x000001B10B570000-0x000001B10B572000-memory.dmp

Filesize
8KB

Download
memory/4088-128-0x00007FFB7FCD0000-0x00007FFB7FCE0000-memory.dmp

Filesize
64KB

Download
memory/4088-129-0x00007FFB7FCD0000-0x00007FFB7FCE0000-memory.dmp

Filesize
64KB

Download
memory/4088-122-0x000001B10B570000-0x000001B10B572000-memory.dmp

Filesize
8KB

Download
memory/4088-121-0x00007FFB83070000-0x00007FFB83080000-memory.dmp

Filesize
64KB

Download
memory/4088-120-0x000001B10B570000-0x000001B10B572000-memory.dmp

Filesize
8KB

Download
memory/4088-115-0x00007FFB83070000-0x00007FFB83080000-memory.dmp

Filesize
64KB

Download
memory/4088-118-0x00007FFB83070000-0x00007FFB83080000-memory.dmp

Filesize
64KB

Download
memory/4088-117-0x00007FFB83070000-0x00007FFB83080000-memory.dmp

Filesize
64KB

Download
memory/4088-116-0x00007FFB83070000-0x00007FFB83080000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads