de54a7c99135db230ba151e513f7813ccca74b08201d7592958e82c51b152386

General

Target

de54a7c99135db230ba151e513f7813ccca74b08201d7592958e82c51b152386.xlsm
Size

83KB
MD5

6b5fbfc62c3f736a188c3f614b14fbe3
SHA1

1ce7dd32aecf09f3b4683f9c3c005d0c6ae82b0a
SHA256

de54a7c99135db230ba151e513f7813ccca74b08201d7592958e82c51b152386
SHA512

ff04fc0017f3a39f777a8671fd030b210d8b99cb30202acc3cc0b0fee8e48f5f12c4b730576a2adfa43955c03e4a2a0e66e954cc8bacfa20963479010717e516

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	1992	2656	rundll32.exe	EXCEL.EXE

Blocklisted process makes network request 3 IoCs

Processes:

rundll32.exe

flow pid process

43 1404 rundll32.exe
44 1404 rundll32.exe
45 1404 rundll32.exe
Downloads MZ/PE file
Loads dropped DLL 2 IoCs

Processes:

rundll32.exerundll32.exe

pid process

1992 rundll32.exe
2280 rundll32.exe
Drops file in System32 directory 1 IoCs

Processes:

rundll32.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Vtqpsroub\bbbck.zwv 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	1404	rundll32.exe
44	1404	rundll32.exe
45	1404	rundll32.exe

pid	process
1992	rundll32.exe
2280	rundll32.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Vtqpsroub\bbbck.zwv	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

2656 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

rundll32.exe

pid process

1404 rundll32.exe
1404 rundll32.exe

pid	process
1404	rundll32.exe
1404	rundll32.exe

Suspicious use of SetWindowsHookEx 12 IoCs

Processes:

EXCEL.EXE

pid	process
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE
2656	EXCEL.EXE

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

EXCEL.EXErundll32.exerundll32.exerundll32.exe

description	pid	process	target process
PID 2656 wrote to memory of 1992	2656	EXCEL.EXE	rundll32.exe
PID 2656 wrote to memory of 1992	2656	EXCEL.EXE	rundll32.exe
PID 2656 wrote to memory of 1992	2656	EXCEL.EXE	rundll32.exe
PID 1992 wrote to memory of 2280	1992	rundll32.exe	rundll32.exe
PID 1992 wrote to memory of 2280	1992	rundll32.exe	rundll32.exe
PID 1992 wrote to memory of 2280	1992	rundll32.exe	rundll32.exe
PID 2280 wrote to memory of 1580	2280	rundll32.exe	rundll32.exe
PID 2280 wrote to memory of 1580	2280	rundll32.exe	rundll32.exe
PID 2280 wrote to memory of 1580	2280	rundll32.exe	rundll32.exe
PID 1580 wrote to memory of 1404	1580	rundll32.exe	rundll32.exe
PID 1580 wrote to memory of 1404	1580	rundll32.exe	rundll32.exe
PID 1580 wrote to memory of 1404	1580	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\de54a7c99135db230ba151e513f7813ccca74b08201d7592958e82c51b152386.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2656

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:1992

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:2280

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Vtqpsroub\bbbck.zwv",ibQQquQD
4⤵
- Suspicious use of WriteProcessMemory
PID:1580

C:\Windows\SysWOW64\rundll32.exe
C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Vtqpsroub\bbbck.zwv",DllRegisterServer
5⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
PID:1404

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
bb8e2574a3832904c6e4308548f8cc10

SHA1
8cb5d14c959f47e49524dfbd57697dc04a092d98

SHA256
96bf62e2cba59dbee4dba9efccb6b0b090fae3017ef2f04ef1edb57338f1b363

SHA512
a07e26bbb364f145a24b22fa700562bb683af1ceb8fee2ea517906f4fb3be40516b17b67bd8605ae91d922442860a77382a08032373abbcbc47c3476e6c532c8

Download Submit
\Users\Admin\erum.ocx
MD5
bb8e2574a3832904c6e4308548f8cc10

SHA1
8cb5d14c959f47e49524dfbd57697dc04a092d98

SHA256
96bf62e2cba59dbee4dba9efccb6b0b090fae3017ef2f04ef1edb57338f1b363

SHA512
a07e26bbb364f145a24b22fa700562bb683af1ceb8fee2ea517906f4fb3be40516b17b67bd8605ae91d922442860a77382a08032373abbcbc47c3476e6c532c8

Download Submit
\Users\Admin\erum.ocx
MD5
bb8e2574a3832904c6e4308548f8cc10

SHA1
8cb5d14c959f47e49524dfbd57697dc04a092d98

SHA256
96bf62e2cba59dbee4dba9efccb6b0b090fae3017ef2f04ef1edb57338f1b363

SHA512
a07e26bbb364f145a24b22fa700562bb683af1ceb8fee2ea517906f4fb3be40516b17b67bd8605ae91d922442860a77382a08032373abbcbc47c3476e6c532c8

Download Submit
memory/1404-302-0x0000000000000000-mapping.dmp

Download
memory/1580-297-0x0000000000000000-mapping.dmp

Download
memory/1992-277-0x0000000000000000-mapping.dmp

Download
memory/2280-282-0x0000000000000000-mapping.dmp

Download
memory/2656-121-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Filesize
64KB

Download
memory/2656-154-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-129-0x00007FFD6F570000-0x00007FFD6F580000-memory.dmp

Filesize
64KB

Download
memory/2656-148-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-150-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-149-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-151-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-152-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-153-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-128-0x00007FFD6F570000-0x00007FFD6F580000-memory.dmp

Filesize
64KB

Download
memory/2656-155-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-122-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-115-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Filesize
64KB

Download
memory/2656-120-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-119-0x0000017619A20000-0x0000017619A22000-memory.dmp

Filesize
8KB

Download
memory/2656-118-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Filesize
64KB

Download
memory/2656-117-0x00007FFD72FE0000-0x00007FFD72FF0000-memory.dmp

Filesize
64KB

Download
memory/2656-116-0x00007FFD72FE0000-0x00007FFD72FF0000-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