remcos | 38770a1d7fb564d852c3f22d70f6e4cf3f24a0e5240f96ebf3d2c017af671618

Analysis

max time kernel
151s
max time network
136s
platform
windows7_x64
resource
win7-20220715-en
resource tags

arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system
submitted
08-08-2022 15:18

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General

Target

PAYSLP18500USD.xlsx
Size

680KB
MD5

93d65d182bdf8a2e9e5d38d1661f3bb7
SHA1

9e21b2b8f08cdaeb810c64762210687ecd1d84df
SHA256

38770a1d7fb564d852c3f22d70f6e4cf3f24a0e5240f96ebf3d2c017af671618
SHA512

1c2c78d4abbc2cadf8620e2105d1474fd1144789ad0c98eb0da9221a8b83742408222c03d71f9a646db40590a1d60441c6258443c1e005085bd49a1abf2deb48

Score

10^/10

remcos mekino aug persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Mekino Aug

mekremcos23.freedynamicdns.net:2397

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
os.exe
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
mouse_option
false
mutex
Rmc-ZCU1S6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
ecv
take_screenshot_option
false
take_screenshot_time
5

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

1 1232 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 4 IoCs

Processes:

SDE.exeSDE.exeos.exeos.exe

pid process

1268 SDE.exe
1376 SDE.exe
320 os.exe
1656 os.exe
Loads dropped DLL 2 IoCs

Processes:

EQNEDT32.EXEcmd.exe

pid process

1232 EQNEDT32.EXE
648 cmd.exe

flow	pid	process
1	1232	EQNEDT32.EXE

pid	process
1268	SDE.exe
1376	SDE.exe
320	os.exe
1656	os.exe

pid	process
1232	EQNEDT32.EXE
648	cmd.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

os.exeSDE.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	os.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ecv = "\"C:\\Users\\Admin\\AppData\\Roaming\\os.exe\""	os.exe
Key created	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Windows\CurrentVersion\Run\	SDE.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Windows\CurrentVersion\Run\ecv = "\"C:\\Users\\Admin\\AppData\\Roaming\\os.exe\""	SDE.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	SDE.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ecv = "\"C:\\Users\\Admin\\AppData\\Roaming\\os.exe\""	SDE.exe
Key created	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Windows\CurrentVersion\Run\	os.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Windows\CurrentVersion\Run\ecv = "\"C:\\Users\\Admin\\AppData\\Roaming\\os.exe\""	os.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

SDE.exeos.exe

description pid process target process

PID 1268 set thread context of 1376 1268 SDE.exe SDE.exe
PID 320 set thread context of 1656 320 os.exe os.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE
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

1232 EQNEDT32.EXE

description	pid	process	target process
PID 1268 set thread context of 1376	1268	SDE.exe	SDE.exe
PID 320 set thread context of 1656	320	os.exe	os.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

pid	process
1232	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 31 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\COMMAND	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\COMMAND	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3440072777-2118400376-1759599358-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\""	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\""	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE

Modifies registry class 64 IoCs

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\ = "&Print"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\application\ = "Excel"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Publisher\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\topic	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\ = "[open(\"%1\")]"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application\ = "Excel"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\topic\ = "system"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\ = "&Edit"	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\topic\ = "system"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" /p %1"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Word\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" %1"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Word\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ddeexec\topic	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\WinWord.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Publisher\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shellex\IconHandler\ = "{42042206-2D85-11D3-8CFF-005004838597}"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Edit\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shellex\IconHandler\ = "{42042206-2D85-11D3-8CFF-005004838597}"	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\InprocServer32	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shellex\IconHandler	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\ShellEx	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1672 EXCEL.EXE
Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

EXCEL.EXEos.exe

pid process

1672 EXCEL.EXE
1672 EXCEL.EXE
1672 EXCEL.EXE
1656 os.exe

pid	process
1672	EXCEL.EXE

pid	process
1672	EXCEL.EXE
1672	EXCEL.EXE
1672	EXCEL.EXE
1656	os.exe

Suspicious use of WriteProcessMemory 42 IoCs

Processes:

EQNEDT32.EXESDE.exeSDE.exeWScript.execmd.exeos.exe

description	pid	process	target process
PID 1232 wrote to memory of 1268	1232	EQNEDT32.EXE	SDE.exe
PID 1232 wrote to memory of 1268	1232	EQNEDT32.EXE	SDE.exe
PID 1232 wrote to memory of 1268	1232	EQNEDT32.EXE	SDE.exe
PID 1232 wrote to memory of 1268	1232	EQNEDT32.EXE	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1268 wrote to memory of 1376	1268	SDE.exe	SDE.exe
PID 1376 wrote to memory of 1792	1376	SDE.exe	WScript.exe
PID 1376 wrote to memory of 1792	1376	SDE.exe	WScript.exe
PID 1376 wrote to memory of 1792	1376	SDE.exe	WScript.exe
PID 1376 wrote to memory of 1792	1376	SDE.exe	WScript.exe
PID 1792 wrote to memory of 648	1792	WScript.exe	cmd.exe
PID 1792 wrote to memory of 648	1792	WScript.exe	cmd.exe
PID 1792 wrote to memory of 648	1792	WScript.exe	cmd.exe
PID 1792 wrote to memory of 648	1792	WScript.exe	cmd.exe
PID 648 wrote to memory of 320	648	cmd.exe	os.exe
PID 648 wrote to memory of 320	648	cmd.exe	os.exe
PID 648 wrote to memory of 320	648	cmd.exe	os.exe
PID 648 wrote to memory of 320	648	cmd.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe
PID 320 wrote to memory of 1656	320	os.exe	os.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\PAYSLP18500USD.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1672

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:1232

C:\Users\Admin\AppData\Roaming\SDE.exe
"C:\Users\Admin\AppData\Roaming\SDE.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1268

C:\Users\Admin\AppData\Roaming\SDE.exe
"C:\Users\Admin\AppData\Roaming\SDE.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1376

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
4⤵
- Suspicious use of WriteProcessMemory
PID:1792

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\os.exe"
5⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:648

C:\Users\Admin\AppData\Roaming\os.exe
C:\Users\Admin\AppData\Roaming\os.exe
6⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:320

C:\Users\Admin\AppData\Roaming\os.exe
"C:\Users\Admin\AppData\Roaming\os.exe"
7⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:1656

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs
Filesize
396B

MD5
c17638c9a95f8295057e1a1902820a14

SHA1
808ee46f81e5d748cd4c7ead5dfb7cea52b1d027

SHA256
372934f440f94377066062d33d18589db5ea2ab733d74ba14bff6b9e3519706e

SHA512
86093a6bc3d1e8179ce9d9ff07660e057b6d2f9687140c18d354ad2f73f0bcc9f570fbeb0b15a6dae7535b002436893cb937d3504ec5c8009be1d45370bd78db

Download Submit
C:\Users\Admin\AppData\Roaming\SDE.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
C:\Users\Admin\AppData\Roaming\SDE.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
C:\Users\Admin\AppData\Roaming\SDE.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
C:\Users\Admin\AppData\Roaming\os.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
C:\Users\Admin\AppData\Roaming\os.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
C:\Users\Admin\AppData\Roaming\os.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
\Users\Admin\AppData\Roaming\SDE.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
\Users\Admin\AppData\Roaming\os.exe
Filesize
879KB

MD5
3b0459dfb384c1285141f4e03f89ff03

SHA1
36d9ed9b3b77c1d67b7001c22be4219e79b2ab56

SHA256
4be4c2cbf4c527636cda35174fac8b99a00e157c78a1bc574b9cb905cf85dfb7

SHA512
d1c9d023791c4111b8d7d842dd5d2fee2b293686c83ada222853eb35e35d22f9ed3b463070dd4e7a21fa17465689bbc023f7165802b4ae17596d06a4779cf360

Download Submit
memory/320-97-0x0000000001070000-0x0000000001152000-memory.dmp

Filesize
904KB

Download
memory/320-95-0x0000000000000000-mapping.dmp

Download
memory/648-92-0x0000000000000000-mapping.dmp

Download
memory/1268-66-0x00000000003F0000-0x0000000000408000-memory.dmp

Filesize
96KB

Download
memory/1268-68-0x0000000005390000-0x0000000005454000-memory.dmp

Filesize
784KB

Download
memory/1268-61-0x0000000000000000-mapping.dmp

Download
memory/1268-64-0x0000000000EC0000-0x0000000000FA2000-memory.dmp

Filesize
904KB

Download
memory/1268-69-0x00000000054A0000-0x000000000551C000-memory.dmp

Filesize
496KB

Download
memory/1376-89-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-80-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-82-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-83-0x0000000000431BE8-mapping.dmp

Download
memory/1376-70-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-87-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-71-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-73-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1376-76-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1656-117-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1656-120-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/1656-112-0x0000000000431BE8-mapping.dmp

Download
memory/1672-67-0x000000007206D000-0x0000000072078000-memory.dmp

Filesize
44KB

Download
memory/1672-57-0x000000007206D000-0x0000000072078000-memory.dmp

Filesize
44KB

Download
memory/1672-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1672-58-0x00000000762B1000-0x00000000762B3000-memory.dmp

Filesize
8KB

Download
memory/1672-55-0x0000000071081000-0x0000000071083000-memory.dmp

Filesize
8KB

Download
memory/1672-54-0x000000002F881000-0x000000002F884000-memory.dmp

Filesize
12KB

Download
memory/1672-118-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1672-119-0x000000007206D000-0x0000000072078000-memory.dmp

Filesize
44KB

Download
memory/1792-88-0x0000000000000000-mapping.dmp

Download