6dc364c1c8552ad4919465e58b65b33bf75d63ded5b197abb8239a14859417e7

General

Target

6dc364c1c8552ad4919465e58b65b33bf75d63ded5b197abb8239a14859417e7.xlsm
Size

83KB
MD5

869396fab1ef81f38ebaeaadef460c48
SHA1

283334e9b78aaaa197cbac4d4343c9e437472cfd
SHA256

6dc364c1c8552ad4919465e58b65b33bf75d63ded5b197abb8239a14859417e7
SHA512

9f60f35a78cb76ff21bfb3ca6739250790e6af7772b20beb98ad75e0e935e84414008c364fa80169d7ef0c7c168d987490b382c74c5ecc2cb3bda966ce6cbba7

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://recont.com/n8xbqb/lwEORjcJYPKCNQ/

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	2788	1204	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 2 IoCs

Processes:

rundll32.exe

flow pid process

44 3928 rundll32.exe
45 3928 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

2788 rundll32.exe
3792 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Bhhkyel\sjbcms.iom 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
44	3928	rundll32.exe
45	3928	rundll32.exe

pid	process
2788	rundll32.exe
3792	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Bhhkyel\sjbcms.iom	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

1204 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

3928 rundll32.exe
3928 rundll32.exe

pid	process
3928	rundll32.exe
3928	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

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

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 1204 wrote to memory of 2788	1204	EXCEL.EXE	rundll32.exe
PID 1204 wrote to memory of 2788	1204	EXCEL.EXE	rundll32.exe
PID 1204 wrote to memory of 2788	1204	EXCEL.EXE	rundll32.exe
PID 2788 wrote to memory of 3792	2788	rundll32.exe	rundll32.exe
PID 2788 wrote to memory of 3792	2788	rundll32.exe	rundll32.exe
PID 2788 wrote to memory of 3792	2788	rundll32.exe	rundll32.exe
PID 3792 wrote to memory of 1628	3792	rundll32.exe	rundll32.exe
PID 3792 wrote to memory of 1628	3792	rundll32.exe	rundll32.exe
PID 3792 wrote to memory of 1628	3792	rundll32.exe	rundll32.exe
PID 1628 wrote to memory of 3928	1628	rundll32.exe	rundll32.exe
PID 1628 wrote to memory of 3928	1628	rundll32.exe	rundll32.exe
PID 1628 wrote to memory of 3928	1628	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\6dc364c1c8552ad4919465e58b65b33bf75d63ded5b197abb8239a14859417e7.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 ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2788

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:3792

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Bhhkyel\sjbcms.iom",FhVJVuDaBDWt
4⤵
- Suspicious use of WriteProcessMemory
PID:1628

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Bhhkyel\sjbcms.iom",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:3928

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
0449ef16213eb4d0d8a4b4648c3fec15

SHA1
a6e9978ae963a7819717b5904087b173ec68733b

SHA256
e4874629969c46209f2c2a27041b2dc32d8d55c0664042745a8686a17234c465

SHA512
d1dc2911f89ece457f03bfcecbc84a5b343b5a78feef6f1bd0aa89aad7cd76c2af82006988a56254b942d8ca22d0a7bf268368a277a926b6dcb9c8d7e1c6c940

Download Submit
\Users\Admin\erum.ocx
MD5
0449ef16213eb4d0d8a4b4648c3fec15

SHA1
a6e9978ae963a7819717b5904087b173ec68733b

SHA256
e4874629969c46209f2c2a27041b2dc32d8d55c0664042745a8686a17234c465

SHA512
d1dc2911f89ece457f03bfcecbc84a5b343b5a78feef6f1bd0aa89aad7cd76c2af82006988a56254b942d8ca22d0a7bf268368a277a926b6dcb9c8d7e1c6c940

Download Submit
\Users\Admin\erum.ocx
MD5
0449ef16213eb4d0d8a4b4648c3fec15

SHA1
a6e9978ae963a7819717b5904087b173ec68733b

SHA256
e4874629969c46209f2c2a27041b2dc32d8d55c0664042745a8686a17234c465

SHA512
d1dc2911f89ece457f03bfcecbc84a5b343b5a78feef6f1bd0aa89aad7cd76c2af82006988a56254b942d8ca22d0a7bf268368a277a926b6dcb9c8d7e1c6c940

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

Filesize
64KB

Download
memory/1204-119-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

Filesize
64KB

Download
memory/1204-120-0x0000022BDA3E0000-0x0000022BDA3E2000-memory.dmp

Filesize
8KB

Download
memory/1204-121-0x0000022BDA3E0000-0x0000022BDA3E2000-memory.dmp

Filesize
8KB

Download
memory/1204-122-0x0000022BDA3E0000-0x0000022BDA3E2000-memory.dmp

Filesize
8KB

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

Filesize
64KB

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

Filesize
64KB

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

Filesize
64KB

Download
memory/1628-280-0x0000000000000000-mapping.dmp

Download
memory/2788-259-0x0000000000000000-mapping.dmp

Download
memory/3792-266-0x0000000000000000-mapping.dmp

Download
memory/3928-285-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads