remcos | 929df8a15e583ad6b64698fb702cf44183f0d726d86cada07cf072d7f9f74913

Analysis

max time kernel
102s
max time network
48s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
01-11-2022 17:14

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General

Target

HIT221000598.xlsx
Size

615KB
MD5

c0540e9242a21eb4de07fb232601dd0e
SHA1

de322fcde28b0a90d2e89e6545c2cf32c2cc714d
SHA256

929df8a15e583ad6b64698fb702cf44183f0d726d86cada07cf072d7f9f74913
SHA512

613e2802a62fc4560a33a05e794b77852f5be6573cd6728946ee9c1cab3e42a8deb2c8e814e71c84be816c8241dbdbdfe17e56051a88a7b0eb8b55385fc7e3fc
SSDEEP

12288:iMmaVPxIFv02yL3i7zvI287jr43/s7L1j9rYf1g7/TuZuRlMmJMH/x9MoMWZ4MyP:iexI1sLS77Kr4v490f1gvKunMmWmW2aq

Score

10^/10

remcos xp persistence rat

Malware Config

Extracted

Family

remcos

Botnet

xpremcuz300622.ddns.net:3542

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
oos.exe
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Remcos-MMP2I7
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
kkl
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

1 960 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 10 IoCs

Processes:

JEF.exeJEF.exeJEF.exeJEF.exeoos.exeoos.exeoos.exeoos.exeoos.exeoos.exe

pid process

1480 JEF.exe
1520 JEF.exe
1592 JEF.exe
2008 JEF.exe
1136 oos.exe
1180 oos.exe
1432 oos.exe
1376 oos.exe
960 oos.exe
1736 oos.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXEcmd.exe

pid process

960 EQNEDT32.EXE
960 EQNEDT32.EXE
1848 cmd.exe
1848 cmd.exe

flow	pid	process
1	960	EQNEDT32.EXE

pid	process
960	EQNEDT32.EXE
960	EQNEDT32.EXE
1848	cmd.exe
1848	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

JEF.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\	JEF.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	JEF.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	JEF.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	JEF.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

JEF.exe

description pid process target process

PID 1480 set thread context of 2008 1480 JEF.exe JEF.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

960 EQNEDT32.EXE

description	pid	process	target process
PID 1480 set thread context of 2008	1480	JEF.exe	JEF.exe

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

pid	process
960	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 31 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\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-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\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\edit\COMMAND	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE
Key created	\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 MHTML Editor\shell	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\COMMAND	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	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 HTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\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 MHTML Editor\shell\edit	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 MHTML Editor\shell\edit\command	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 deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE

Modifies registry class 64 IoCs

Processes:

EXCEL.EXE

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\ShellEx	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon\mhtmlfile	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\application\ = "Excel"	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\shell\edit	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\MSPub.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1"	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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" /p %1"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\WINWORD.EXE\" /n \"%1\""	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\application	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\ddeexec\topic	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\.htm\OpenWithList\Microsoft Word\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0045005800430045004c00460069006c00650073003e00560069006a00710042006f006600280059003800270077002100460049006400310067004c00510020002f0064006400650000000000	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 deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\shell\Print	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\InprocServer32	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Publisher\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b005000750062005000720069006d006100720079003e00520024006e0075006a0053005700460065003f007d0061004c00720052007000390078004000570020002500310000000000	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Version\14\ = "C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application\ = "Excel"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\htmlfile\ShellEx	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Word	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\topic	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Version	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Word\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Excel.exe\shell\edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Old Icon\htmlfile	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\ddeexec	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\DefaultIcon\ = "\"%1\""	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\.htm\OpenWithList\WinWord.exe\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}\Version\14	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Word\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Microsoft Excel\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\EXCEL.EXE\" /dde"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shellex\IconHandler\ = "{42042206-2D85-11D3-8CFF-005004838597}"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{42042206-2D85-11D3-8CFF-005004838597}	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Publisher	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\WinWord.exe\shell\edit\ = "&Open"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ = "&Open"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\MSPub.exe\shell\edit\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\Excel.exe\shell\edit\ddeexec\ = "[open(\"%1\")]"	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.htm\OpenWithList\MSPub.exe\shell\edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\MSPUB.EXE\" %1"	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Edit\command\ = "\"C:\\Program Files (x86)\\Microsoft Office\\Office14\\msohtmed.exe\" %1"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\mhtmlfile\shell\Print\command	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.mht\OpenWithList\Microsoft Excel\shell\edit\ddeexec\application\ = "Excel"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

536 EXCEL.EXE

pid	process
536	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

JEF.exeoos.exe

pid	process
1480	JEF.exe
1480	JEF.exe
1480	JEF.exe
1480	JEF.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe
1136	oos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

JEF.exeoos.exe

description pid process

Token: SeDebugPrivilege 1480 JEF.exe
Token: SeDebugPrivilege 1136 oos.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

536 EXCEL.EXE
536 EXCEL.EXE
536 EXCEL.EXE

description	pid	process
Token: SeDebugPrivilege	1480	JEF.exe
Token: SeDebugPrivilege	1136	oos.exe

pid	process
536	EXCEL.EXE
536	EXCEL.EXE
536	EXCEL.EXE

Suspicious use of WriteProcessMemory 57 IoCs

Processes:

EQNEDT32.EXEJEF.exeJEF.exeWScript.execmd.exeoos.exe

description	pid	process	target process
PID 960 wrote to memory of 1480	960	EQNEDT32.EXE	JEF.exe
PID 960 wrote to memory of 1480	960	EQNEDT32.EXE	JEF.exe
PID 960 wrote to memory of 1480	960	EQNEDT32.EXE	JEF.exe
PID 960 wrote to memory of 1480	960	EQNEDT32.EXE	JEF.exe
PID 1480 wrote to memory of 1520	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1520	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1520	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1520	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1592	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1592	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1592	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 1592	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 1480 wrote to memory of 2008	1480	JEF.exe	JEF.exe
PID 2008 wrote to memory of 1236	2008	JEF.exe	WScript.exe
PID 2008 wrote to memory of 1236	2008	JEF.exe	WScript.exe
PID 2008 wrote to memory of 1236	2008	JEF.exe	WScript.exe
PID 2008 wrote to memory of 1236	2008	JEF.exe	WScript.exe
PID 1236 wrote to memory of 1848	1236	WScript.exe	cmd.exe
PID 1236 wrote to memory of 1848	1236	WScript.exe	cmd.exe
PID 1236 wrote to memory of 1848	1236	WScript.exe	cmd.exe
PID 1236 wrote to memory of 1848	1236	WScript.exe	cmd.exe
PID 1848 wrote to memory of 1136	1848	cmd.exe	oos.exe
PID 1848 wrote to memory of 1136	1848	cmd.exe	oos.exe
PID 1848 wrote to memory of 1136	1848	cmd.exe	oos.exe
PID 1848 wrote to memory of 1136	1848	cmd.exe	oos.exe
PID 1136 wrote to memory of 1180	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1180	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1180	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1180	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1432	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1432	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1432	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1432	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1376	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1376	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1376	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1376	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1736	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1736	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1736	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 1736	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 960	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 960	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 960	1136	oos.exe	oos.exe
PID 1136 wrote to memory of 960	1136	oos.exe	oos.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\HIT221000598.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:536

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:960

C:\Users\Admin\AppData\Roaming\JEF.exe
C:\Users\Admin\AppData\Roaming\JEF.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1480

C:\Users\Admin\AppData\Roaming\JEF.exe
"C:\Users\Admin\AppData\Roaming\JEF.exe"
3⤵
- Executes dropped EXE
PID:1520

C:\Users\Admin\AppData\Roaming\JEF.exe
"C:\Users\Admin\AppData\Roaming\JEF.exe"
3⤵
- Executes dropped EXE
PID:1592

C:\Users\Admin\AppData\Roaming\JEF.exe
"C:\Users\Admin\AppData\Roaming\JEF.exe"
3⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2008

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
4⤵
- Suspicious use of WriteProcessMemory
PID:1236

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"
5⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1848

C:\Users\Admin\AppData\Roaming\oos.exe
C:\Users\Admin\AppData\Roaming\oos.exe
6⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1136

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1180

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1432

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1376

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:960

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1736

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
398B

MD5
a5d3440f90cbfae712166e20870eaed7

SHA1
cc1e1a2945eb2ad475234344f7527ad9e9873647

SHA256
960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02

SHA512
d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa

Download Submit
C:\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
C:\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
\Users\Admin\AppData\Roaming\JEF.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
\Users\Admin\AppData\Roaming\oos.exe
Filesize
934KB

MD5
706ac294f54bfd2a28d03f1c79165f9b

SHA1
3d1dfcfe35776eb04ecd773f1d2038f74dbcb4f0

SHA256
d35305729959edc2c2f6821a1460ea8b1680ad5083a649080df614221c02492e

SHA512
aeb77106f3ac27c05a0178ad56b8d959d3120e883575732e2e656ffc596e23b81e6673ea03fd54598028c1c45a2155c83f8a1f4d3a981a7777e459cb3e7b68c0

Download Submit
memory/536-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/536-54-0x000000002F2C1000-0x000000002F2C4000-memory.dmp

Filesize
12KB

Download
memory/536-55-0x0000000071451000-0x0000000071453000-memory.dmp

Filesize
8KB

Download
memory/536-57-0x000000007243D000-0x0000000072448000-memory.dmp

Filesize
44KB

Download
memory/536-58-0x0000000075B11000-0x0000000075B13000-memory.dmp

Filesize
8KB

Download
memory/536-105-0x000000007243D000-0x0000000072448000-memory.dmp

Filesize
44KB

Download
memory/536-104-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/536-69-0x000000007243D000-0x0000000072448000-memory.dmp

Filesize
44KB

Download
memory/1136-100-0x0000000000000000-mapping.dmp

Download
memory/1136-102-0x0000000000360000-0x0000000000450000-memory.dmp

Filesize
960KB

Download
memory/1236-92-0x0000000000000000-mapping.dmp

Download
memory/1480-71-0x0000000002210000-0x000000000228A000-memory.dmp

Filesize
488KB

Download
memory/1480-70-0x0000000006070000-0x0000000006120000-memory.dmp

Filesize
704KB

Download
memory/1480-67-0x0000000005190000-0x0000000005274000-memory.dmp

Filesize
912KB

Download
memory/1480-62-0x0000000000000000-mapping.dmp

Download
memory/1480-65-0x0000000000210000-0x0000000000300000-memory.dmp

Filesize
960KB

Download
memory/1480-68-0x00000000007C0000-0x00000000007D6000-memory.dmp

Filesize
88KB

Download
memory/1848-96-0x0000000000000000-mapping.dmp

Download
memory/2008-93-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-91-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-86-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-87-0x000000000043168C-mapping.dmp

Download
memory/2008-84-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-82-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-81-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-80-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-79-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/2008-74-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download

pid	process
1480	JEF.exe
1520	JEF.exe
1592	JEF.exe
2008	JEF.exe
1136	oos.exe
1180	oos.exe
1432	oos.exe
1376	oos.exe
960	oos.exe
1736	oos.exe