remcos | 6d8d1fd65107d64556278ebe3f3abc553dcc1c4806bb64ee267973e7155465f4

Analysis

max time kernel
105s
max time network
52s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01-11-2022 17:11

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General

Target

DraftXBl.xlsx
Size

707KB
MD5

43e45bd39f26df0a62fd46e74029ac29
SHA1

0c3a104ed323ffa4d07bdab19bb132dc1c10936e
SHA256

6d8d1fd65107d64556278ebe3f3abc553dcc1c4806bb64ee267973e7155465f4
SHA512

c0a8e3d364ff83d0ed19aee663e89b5802742f02d5c3964718fb4a15f788561af6a745f3bd75849e16d2dcb00dd22a319da684b29f35b400a74bc04329e667a2
SSDEEP

12288:DkWI3guRYq00GtRXrDSSGaPgaEcV4IFit5/eFW9jo2PP+yU55IzMn9EwBWt:DUgulKtRaSDdHAt5CWGF54zt

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 1732 EQNEDT32.EXE
Downloads MZ/PE file
Executes dropped EXE 8 IoCs

Processes:

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

pid process

544 JEF.exe
596 JEF.exe
1812 oos.exe
616 oos.exe
1260 oos.exe
1932 oos.exe
1620 oos.exe
1712 oos.exe
Loads dropped DLL 4 IoCs

Processes:

EQNEDT32.EXEcmd.exe

pid process

1732 EQNEDT32.EXE
1732 EQNEDT32.EXE
1408 cmd.exe
1408 cmd.exe

flow	pid	process
1	1732	EQNEDT32.EXE

pid	process
544	JEF.exe
596	JEF.exe
1812	oos.exe
616	oos.exe
1260	oos.exe
1932	oos.exe
1620	oos.exe
1712	oos.exe

pid	process
1732	EQNEDT32.EXE
1732	EQNEDT32.EXE
1408	cmd.exe
1408	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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\""	JEF.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	JEF.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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

Suspicious use of SetThreadContext 1 IoCs

Processes:

JEF.exe

description pid process target process

PID 544 set thread context of 596 544 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

1732 EQNEDT32.EXE

description	pid	process	target process
PID 544 set thread context of 596	544	JEF.exe	JEF.exe

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

pid	process
1732	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 31 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Key created	\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 HTML Editor	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 HTML Editor	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit\command\command = 7800620027004200560035002100210021002100210021002100210021004d004b004b0053006b0057004f0052004400460069006c00650073003e00620069002400540021005600210030005a003d007b0050006b00300076006d007e0041005a00750020002f006e002000220025003100220000000000	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor	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 HTML 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 deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	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
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	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	EXCEL.EXE
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default MHTML Editor\shell\edit\ = "&Edit"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\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\COMMAND	EXCEL.EXE
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell	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\edit	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	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
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Default HTML Editor\shell\edit	EXCEL.EXE

Modifies registry class 64 IoCs

Processes:

EXCEL.EXE

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

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1364 EXCEL.EXE
Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

oos.exe

pid process

1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
1812 oos.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

oos.exe

description pid process

Token: SeDebugPrivilege 1812 oos.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1364 EXCEL.EXE
1364 EXCEL.EXE
1364 EXCEL.EXE

pid	process
1364	EXCEL.EXE

pid	process
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe
1812	oos.exe

description	pid	process
Token: SeDebugPrivilege	1812	oos.exe

pid	process
1364	EXCEL.EXE
1364	EXCEL.EXE
1364	EXCEL.EXE

Suspicious use of WriteProcessMemory 49 IoCs

Processes:

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

description	pid	process	target process
PID 1732 wrote to memory of 544	1732	EQNEDT32.EXE	JEF.exe
PID 1732 wrote to memory of 544	1732	EQNEDT32.EXE	JEF.exe
PID 1732 wrote to memory of 544	1732	EQNEDT32.EXE	JEF.exe
PID 1732 wrote to memory of 544	1732	EQNEDT32.EXE	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 544 wrote to memory of 596	544	JEF.exe	JEF.exe
PID 596 wrote to memory of 736	596	JEF.exe	WScript.exe
PID 596 wrote to memory of 736	596	JEF.exe	WScript.exe
PID 596 wrote to memory of 736	596	JEF.exe	WScript.exe
PID 596 wrote to memory of 736	596	JEF.exe	WScript.exe
PID 736 wrote to memory of 1408	736	WScript.exe	cmd.exe
PID 736 wrote to memory of 1408	736	WScript.exe	cmd.exe
PID 736 wrote to memory of 1408	736	WScript.exe	cmd.exe
PID 736 wrote to memory of 1408	736	WScript.exe	cmd.exe
PID 1408 wrote to memory of 1812	1408	cmd.exe	oos.exe
PID 1408 wrote to memory of 1812	1408	cmd.exe	oos.exe
PID 1408 wrote to memory of 1812	1408	cmd.exe	oos.exe
PID 1408 wrote to memory of 1812	1408	cmd.exe	oos.exe
PID 1812 wrote to memory of 616	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 616	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 616	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 616	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1260	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1260	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1260	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1260	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1932	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1932	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1932	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1932	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1620	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1620	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1620	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1620	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1712	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1712	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1712	1812	oos.exe	oos.exe
PID 1812 wrote to memory of 1712	1812	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\DraftXBl.xlsx
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:1364

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:1732

C:\Users\Admin\AppData\Roaming\JEF.exe
C:\Users\Admin\AppData\Roaming\JEF.exe
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:544

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:596

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
4⤵
- Suspicious use of WriteProcessMemory
PID:736

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:1408

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:1812

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:616

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1260

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1712

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1620

C:\Users\Admin\AppData\Roaming\oos.exe
"C:\Users\Admin\AppData\Roaming\oos.exe"
7⤵
- Executes dropped EXE
PID:1932

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
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

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

MD5
9bd821ba65b89710d2d81c7a7b98ab5d

SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925

SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8

SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4

Download Submit
memory/544-67-0x0000000004FD0000-0x00000000050B4000-memory.dmp

Filesize
912KB

Download
memory/544-71-0x0000000007F90000-0x000000000800A000-memory.dmp

Filesize
488KB

Download
memory/544-62-0x0000000000000000-mapping.dmp

Download
memory/544-65-0x0000000000ED0000-0x0000000000FC0000-memory.dmp

Filesize
960KB

Download
memory/544-68-0x0000000000BA0000-0x0000000000BB6000-memory.dmp

Filesize
88KB

Download
memory/544-70-0x0000000007EE0000-0x0000000007F90000-memory.dmp

Filesize
704KB

Download
memory/596-82-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-75-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-72-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-84-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-85-0x000000000043168C-mapping.dmp

Download
memory/596-78-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-89-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-91-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-79-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-73-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-77-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/596-80-0x0000000000400000-0x000000000047E000-memory.dmp

Filesize
504KB

Download
memory/736-90-0x0000000000000000-mapping.dmp

Download
memory/1364-69-0x000000007243D000-0x0000000072448000-memory.dmp

Filesize
44KB

Download
memory/1364-54-0x000000002F6E1000-0x000000002F6E4000-memory.dmp

Filesize
12KB

Download
memory/1364-58-0x0000000075091000-0x0000000075093000-memory.dmp

Filesize
8KB

Download
memory/1364-57-0x000000007243D000-0x0000000072448000-memory.dmp

Filesize
44KB

Download
memory/1364-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1364-55-0x0000000071451000-0x0000000071453000-memory.dmp

Filesize
8KB

Download
memory/1364-107-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1364-108-0x000000007243D000-0x0000000072448000-memory.dmp

Filesize
44KB

Download
memory/1408-94-0x0000000000000000-mapping.dmp

Download
memory/1812-98-0x0000000000000000-mapping.dmp

Download
memory/1812-100-0x00000000003B0000-0x00000000004A0000-memory.dmp

Filesize
960KB

Download