26261f6683880339a902fbe83bf577ff5656ba5e8b1b274c694a8a2f31a83346

General

Target

26261f6683880339a902fbe83bf577ff5656ba5e8b1b274c694a8a2f31a83346.xlsm
Size

83KB
MD5

f9012d9418b433820f28296b327f19c8
SHA1

1e71ded4267684b861ddd3aebc1e3839ff177058
SHA256

26261f6683880339a902fbe83bf577ff5656ba5e8b1b274c694a8a2f31a83346
SHA512

62be71d64b3eaf6921449087418814c598661626081e2af0b75f92dc0fa845cb1853aa4c4ab5e727257292ad1043fd6fa2e3a0545daac8beedd2ff9ca5fd5e48

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://www.crownpacificpartners.com/guglio/Rt4el/

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	888	3928	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

45 312 rundll32.exe
46 312 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

888 rundll32.exe
2924 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Qbtdsvvfcv\mdkknhw.xfk 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	312	rundll32.exe
46	312	rundll32.exe

pid	process
888	rundll32.exe
2924	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Qbtdsvvfcv\mdkknhw.xfk	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

3928 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

312 rundll32.exe
312 rundll32.exe

pid	process
312	rundll32.exe
312	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE
3928	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 3928 wrote to memory of 888	3928	EXCEL.EXE	rundll32.exe
PID 3928 wrote to memory of 888	3928	EXCEL.EXE	rundll32.exe
PID 3928 wrote to memory of 888	3928	EXCEL.EXE	rundll32.exe
PID 888 wrote to memory of 2924	888	rundll32.exe	rundll32.exe
PID 888 wrote to memory of 2924	888	rundll32.exe	rundll32.exe
PID 888 wrote to memory of 2924	888	rundll32.exe	rundll32.exe
PID 2924 wrote to memory of 832	2924	rundll32.exe	rundll32.exe
PID 2924 wrote to memory of 832	2924	rundll32.exe	rundll32.exe
PID 2924 wrote to memory of 832	2924	rundll32.exe	rundll32.exe
PID 832 wrote to memory of 312	832	rundll32.exe	rundll32.exe
PID 832 wrote to memory of 312	832	rundll32.exe	rundll32.exe
PID 832 wrote to memory of 312	832	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\26261f6683880339a902fbe83bf577ff5656ba5e8b1b274c694a8a2f31a83346.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3928

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:888

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:2924

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Qbtdsvvfcv\mdkknhw.xfk",BtFfCta
4⤵
- Suspicious use of WriteProcessMemory
PID:832

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Qbtdsvvfcv\mdkknhw.xfk",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:312

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\erum.ocx
MD5
85235a3a9c92aea220d7543cdb830785

SHA1
f061f7c2a5c1174138f3fd786bee273501b0c83d

SHA256
dbb12d51387a1cc3e5be76d2d41d0fa9b6b3f78bee471dbc91f3d387eaab04c7

SHA512
657c2dfdb416929725e70a1057cbad6578a2a0f2ee0a7da91a835af7c05a1f32182b0683e541f986c302773cbb649a5bd347009ba688a30336b98ee0e0e0afad

Download Submit
\Users\Admin\erum.ocx
MD5
85235a3a9c92aea220d7543cdb830785

SHA1
f061f7c2a5c1174138f3fd786bee273501b0c83d

SHA256
dbb12d51387a1cc3e5be76d2d41d0fa9b6b3f78bee471dbc91f3d387eaab04c7

SHA512
657c2dfdb416929725e70a1057cbad6578a2a0f2ee0a7da91a835af7c05a1f32182b0683e541f986c302773cbb649a5bd347009ba688a30336b98ee0e0e0afad

Download Submit
\Users\Admin\erum.ocx
MD5
85235a3a9c92aea220d7543cdb830785

SHA1
f061f7c2a5c1174138f3fd786bee273501b0c83d

SHA256
dbb12d51387a1cc3e5be76d2d41d0fa9b6b3f78bee471dbc91f3d387eaab04c7

SHA512
657c2dfdb416929725e70a1057cbad6578a2a0f2ee0a7da91a835af7c05a1f32182b0683e541f986c302773cbb649a5bd347009ba688a30336b98ee0e0e0afad

Download Submit
memory/312-284-0x0000000000000000-mapping.dmp

Download
memory/832-281-0x0000000000000000-mapping.dmp

Download
memory/888-260-0x0000000000000000-mapping.dmp

Download
memory/2924-265-0x0000000000000000-mapping.dmp

Download
memory/3928-118-0x00007FFD329F0000-0x00007FFD32A00000-memory.dmp

Filesize
64KB

Download
memory/3928-122-0x00000271AE3B0000-0x00000271AE3B2000-memory.dmp

Filesize
8KB

Download
memory/3928-121-0x00007FFD329F0000-0x00007FFD32A00000-memory.dmp

Filesize
64KB

Download
memory/3928-119-0x00000271AE3B0000-0x00000271AE3B2000-memory.dmp

Filesize
8KB

Download
memory/3928-120-0x00000271AE3B0000-0x00000271AE3B2000-memory.dmp

Filesize
8KB

Download
memory/3928-115-0x00007FFD329F0000-0x00007FFD32A00000-memory.dmp

Filesize
64KB

Download
memory/3928-117-0x00007FFD329F0000-0x00007FFD32A00000-memory.dmp

Filesize
64KB

Download
memory/3928-116-0x00007FFD329F0000-0x00007FFD32A00000-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