remcos | 140ee2b8d6fba55259d70bab833fbae1924c7426bb8ddc79aaa5088435281872

General

Target

document_v152120.doc.rtf
Size

12KB
MD5

3c9b171aa4191384845ffc13021f3a7f
SHA1

0acd262c9aad61b328b4d37a3460ba41630ef3a0
SHA256

140ee2b8d6fba55259d70bab833fbae1924c7426bb8ddc79aaa5088435281872
SHA512

62bd151a6e9520133a6e1257f06ebe8bfcd0da71f7665a402b9d136c48c561f3b17eaae462cc709845c503de89d208d735caacb7e5df234ad2397900d7de89cc

Score

10^/10

remcos persistence ransomware rat

Malware Config

Extracted

Family

remcos

C2

moneyds.ddns.net:6332

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow pid process

6 1880 EQNEDT32.EXE
Executes dropped EXE 1 IoCs

Processes:

vbc.exe

pid process

1160 vbc.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXE

pid process

1880 EQNEDT32.EXE
1880 EQNEDT32.EXE
1880 EQNEDT32.EXE
1880 EQNEDT32.EXE
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

flow	pid	process
6	1880	EQNEDT32.EXE

pid	process
1160	vbc.exe

pid	process
1880	EQNEDT32.EXE
1880	EQNEDT32.EXE
1880	EQNEDT32.EXE
1880	EQNEDT32.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

vbc.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\Vzuer = "C:\\Users\\Public\\Libraries\\reuzV.url"	vbc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
ransomware

System Information Discovery
T1082
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

1880 EQNEDT32.EXE

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
1880	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE

Script User-Agent 1 IoCs
Uses user-agent string associated with script host/environment.

Processes:

description flow ioc

HTTP User-Agent header 8 Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)
Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1632 WINWORD.EXE
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

ieinstal.exe

pid process

600 ieinstal.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

WINWORD.EXEieinstal.exe

pid process

1632 WINWORD.EXE
1632 WINWORD.EXE
600 ieinstal.exe

description	flow	ioc
HTTP User-Agent header	8	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

pid	process
1632	WINWORD.EXE

pid	process
600	ieinstal.exe

pid	process
1632	WINWORD.EXE
1632	WINWORD.EXE
600	ieinstal.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

EQNEDT32.EXEvbc.exe

description	pid	process	target process
PID 1880 wrote to memory of 1160	1880	EQNEDT32.EXE	vbc.exe
PID 1880 wrote to memory of 1160	1880	EQNEDT32.EXE	vbc.exe
PID 1880 wrote to memory of 1160	1880	EQNEDT32.EXE	vbc.exe
PID 1880 wrote to memory of 1160	1880	EQNEDT32.EXE	vbc.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe
PID 1160 wrote to memory of 600	1160	vbc.exe	ieinstal.exe

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\document_v152120.doc.rtf"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1632

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1880

C:\Users\Public\vbc.exe
"C:\Users\Public\vbc.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1160

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Program Files (x86)\internet explorer\ieinstal.exe"
3⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:600

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scripting

1

T1064

Exploitation for Client Execution

1

T1203

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Scripting

1

T1064

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Public\vbc.exe
MD5
94423788a47cedbe5b46a2b89b5b9752

SHA1
71608fbb6afbfcf32539aa5904648ee1649dae18

SHA256
3bcf899b778064f54dd03e61ad7f645386e8b8036ecae968cc33590ea89516be

SHA512
291befa1bdcf49517854b9891c98e0bed663d3a7cf7ffd9aabf4225c466963b6d9fc6ddafc4bed34bc7946fb49545a9c1e8499ed785f0ec666675f713b156cfd

Download Submit
C:\Users\Public\vbc.exe
MD5
94423788a47cedbe5b46a2b89b5b9752

SHA1
71608fbb6afbfcf32539aa5904648ee1649dae18

SHA256
3bcf899b778064f54dd03e61ad7f645386e8b8036ecae968cc33590ea89516be

SHA512
291befa1bdcf49517854b9891c98e0bed663d3a7cf7ffd9aabf4225c466963b6d9fc6ddafc4bed34bc7946fb49545a9c1e8499ed785f0ec666675f713b156cfd

Download Submit
\Users\Public\vbc.exe
MD5
94423788a47cedbe5b46a2b89b5b9752

SHA1
71608fbb6afbfcf32539aa5904648ee1649dae18

SHA256
3bcf899b778064f54dd03e61ad7f645386e8b8036ecae968cc33590ea89516be

SHA512
291befa1bdcf49517854b9891c98e0bed663d3a7cf7ffd9aabf4225c466963b6d9fc6ddafc4bed34bc7946fb49545a9c1e8499ed785f0ec666675f713b156cfd

Download Submit
\Users\Public\vbc.exe
MD5
94423788a47cedbe5b46a2b89b5b9752

SHA1
71608fbb6afbfcf32539aa5904648ee1649dae18

SHA256
3bcf899b778064f54dd03e61ad7f645386e8b8036ecae968cc33590ea89516be

SHA512
291befa1bdcf49517854b9891c98e0bed663d3a7cf7ffd9aabf4225c466963b6d9fc6ddafc4bed34bc7946fb49545a9c1e8499ed785f0ec666675f713b156cfd

Download Submit
\Users\Public\vbc.exe
MD5
94423788a47cedbe5b46a2b89b5b9752

SHA1
71608fbb6afbfcf32539aa5904648ee1649dae18

SHA256
3bcf899b778064f54dd03e61ad7f645386e8b8036ecae968cc33590ea89516be

SHA512
291befa1bdcf49517854b9891c98e0bed663d3a7cf7ffd9aabf4225c466963b6d9fc6ddafc4bed34bc7946fb49545a9c1e8499ed785f0ec666675f713b156cfd

Download Submit
\Users\Public\vbc.exe
MD5
94423788a47cedbe5b46a2b89b5b9752

SHA1
71608fbb6afbfcf32539aa5904648ee1649dae18

SHA256
3bcf899b778064f54dd03e61ad7f645386e8b8036ecae968cc33590ea89516be

SHA512
291befa1bdcf49517854b9891c98e0bed663d3a7cf7ffd9aabf4225c466963b6d9fc6ddafc4bed34bc7946fb49545a9c1e8499ed785f0ec666675f713b156cfd

Download Submit
memory/600-17-0x0000000000150000-0x0000000000151000-memory.dmp

Filesize
4KB

Download
memory/600-19-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/600-26-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/600-25-0x0000000010540000-0x0000000010564000-memory.dmp

Filesize
144KB

Download
memory/600-15-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/600-16-0x0000000000000000-mapping.dmp

Download
memory/1160-13-0x0000000000220000-0x0000000000221000-memory.dmp

Filesize
4KB

Download
memory/1160-11-0x0000000000000000-mapping.dmp

Download
memory/1632-3-0x0000000070741000-0x0000000070743000-memory.dmp

Filesize
8KB

Download
memory/1632-2-0x0000000072CC1000-0x0000000072CC4000-memory.dmp

Filesize
12KB

Download
memory/1632-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1632-27-0x0000000001D80000-0x0000000001D81000-memory.dmp

Filesize
4KB

Download
memory/1632-29-0x0000000001D80000-0x0000000001D81000-memory.dmp

Filesize
4KB

Download
memory/1632-30-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1788-6-0x000007FEF7B10000-0x000007FEF7D8A000-memory.dmp

Filesize
2.5MB

Download
memory/1880-5-0x0000000076341000-0x0000000076343000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads