glupteba | 769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c

Analysis

max time kernel
146s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
29/03/2023, 16:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Size

4.1MB
MD5

be3e4ff45023420855bca037e9a86548
SHA1

8a7884f774084478ddf4075b84d7bc9f0ecf9cae
SHA256

769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c
SHA512

3d6b840ee3a93891cf6a6d6e940fb14e57e437d8d40bebc38e9b035733989be8d96674cff5a0e9fd7f739790d4bad03d67794705cf2ef51b60601cc2202dfccd
SSDEEP

49152:Sl58oGO/1alm2ulPvxlN9PMJxgVhgiPuJNoBVnJx5s9+veMOJSWvTgrATlnsQCN:q+Ren2ulHxlrMJxgVhFnB95321JjU8dW

Score

10^/10

glupteba discovery dropper evasion loader persistence rootkit upx

Malware Config

Signatures

Glupteba
Glupteba is a modular loader written in Golang with various components.
loader dropper glupteba

Glupteba payload 17 IoCs

resource	yara_rule
behavioral1/memory/4828-134-0x0000000002E30000-0x00000000036A7000-memory.dmp	family_glupteba
behavioral1/memory/4828-135-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1032-142-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-148-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-149-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-150-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-151-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-152-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-153-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-154-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-155-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-156-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-157-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-158-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-159-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-160-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba
behavioral1/memory/1752-167-0x0000000000400000-0x0000000000C91000-memory.dmp	family_glupteba

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
4800	netsh.exe

Executes dropped EXE 3 IoCs

pid	Process
1752	csrss.exe
1080	injector.exe
3816	f801950a962ddba14caaa44bf084b55c.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/files/0x000300000000072d-164.dat	upx
behavioral1/files/0x000300000000072d-165.dat	upx
behavioral1/memory/3816-166-0x0000000000400000-0x0000000000C25000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\csrss = "\"C:\\Windows\\rss\\csrss.exe\""	csrss.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

Manipulates WinMonFS driver. 1 IoCs

Roottkits write to WinMonFS to hide directories/files from being detected.

rootkit evasion

description	ioc	Process
File opened for modification	\??\WinMonFS	csrss.exe

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\rss	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
File created	C:\Windows\rss\csrss.exe	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4364	1032	WerFault.exe	88

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
4944	schtasks.exe
4460	schtasks.exe

Modifies data under HKEY_USERS 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-372 = "Jerusalem Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2371 = "Easter Island Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-961 = "Paraguay Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2891 = "Sudan Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2142 = "Transbaikal Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1042 = "Ulaanbaatar Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2002 = "Cabo Verde Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-232 = "Hawaiian Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-3051 = "Qyzylorda Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2452 = "Saint Pierre Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-381 = "South Africa Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-351 = "FLE Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-432 = "Iran Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2632 = "Norfolk Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-281 = "Central Europe Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-911 = "Mauritius Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-121 = "SA Pacific Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\Disallowed	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-221 = "Alaskan Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1662 = "Bahia Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2612 = "Bougainville Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-751 = "Tonga Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\trust	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1872 = "Russia TZ 7 Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-302 = "Romance Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\TrustedPeople\CTLs	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-151 = "Central America Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-282 = "Central Europe Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-892 = "Morocco Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-371 = "Jerusalem Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\CA\CTLs	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Policies\Microsoft\SystemCertificates\trust	csrss.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot\Certificates	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-511 = "Central Asia Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1871 = "Russia TZ 7 Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-91 = "Pacific SA Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-271 = "Greenwich Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-502 = "Nepal Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1411 = "Syria Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\SmartCardRoot	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-82 = "Atlantic Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-671 = "AUS Eastern Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-681 = "E. Australia Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-962 = "Paraguay Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-661 = "Cen. Australia Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2771 = "Omsk Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-212 = "Pacific Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\SystemCertificates\CA	csrss.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-722 = "Central Pacific Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-621 = "Korea Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-752 = "Tonga Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2061 = "North Korea Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2892 = "Sudan Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2042 = "Eastern Standard Time (Mexico)"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-51 = "Greenland Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-2412 = "Marquesas Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-331 = "E. Europe Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-434 = "Georgian Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-31 = "Mid-Atlantic Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-771 = "Montevideo Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-81 = "Atlantic Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-1661 = "Bahia Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-161 = "Central Daylight Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\C:\Windows\system32\,@tzres.dll,-842 = "Argentina Standard Time"	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
4828	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
4828	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1752	csrss.exe
1752	csrss.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1752	csrss.exe
1752	csrss.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe
1080	injector.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4828	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Token: SeImpersonatePrivilege	4828	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
Token: SeSystemEnvironmentPrivilege	1752	csrss.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1032 wrote to memory of 3212	1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe	90
PID 1032 wrote to memory of 3212	1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe	90
PID 3212 wrote to memory of 4800	3212	cmd.exe	92
PID 3212 wrote to memory of 4800	3212	cmd.exe	92
PID 1032 wrote to memory of 1752	1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe	93
PID 1032 wrote to memory of 1752	1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe	93
PID 1032 wrote to memory of 1752	1032	769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe	93
PID 1752 wrote to memory of 1080	1752	csrss.exe	102
PID 1752 wrote to memory of 1080	1752	csrss.exe	102
PID 1752 wrote to memory of 3816	1752	csrss.exe	108
PID 1752 wrote to memory of 3816	1752	csrss.exe	108
PID 1752 wrote to memory of 3816	1752	csrss.exe	108

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
"C:\Users\Admin\AppData\Local\Temp\769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4828
- C:\Users\Admin\AppData\Local\Temp\769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe
  "C:\Users\Admin\AppData\Local\Temp\769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c.exe"
  2⤵
  - Adds Run key to start application
  - Checks for VirtualBox DLLs, possible anti-VM trick
  - Drops file in Windows directory
  - Modifies data under HKEY_USERS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:1032
- - C:\Windows\system32\cmd.exe
    C:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3212
  - - C:\Windows\system32\netsh.exe
      netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes
      4⤵
      Modifies Windows Firewall
      PID:4800
- - C:\Windows\rss\csrss.exe
    C:\Windows\rss\csrss.exe
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Manipulates WinMonFS driver.
    - Modifies data under HKEY_USERS
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1752
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Creates scheduled task(s)
      PID:4944
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /delete /tn ScheduledUpdate /f
      4⤵
      PID:3868
  - - C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe
      C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe taskmgr.exe C:\Users\Admin\AppData\Local\Temp\csrss\injector\NtQuerySystemInformationHook.dll
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      PID:1080
  - - C:\Windows\SYSTEM32\schtasks.exe
      schtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F
      4⤵
      Creates scheduled task(s)
      PID:4460
  - - C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe
      C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe
      4⤵
      Executes dropped EXE
      PID:3816
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        schtasks /delete /tn "csrss" /f
        5⤵
        
        PID:2344
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        schtasks /delete /tn "ScheduledUpdate" /f
        5⤵
        
        PID:968
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1032 -s 624
    3⤵
    - Program crash
    PID:4364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1032 -ip 1032
1⤵
PID:4776

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe

Filesize
3.2MB

MD5
f801950a962ddba14caaa44bf084b55c

SHA1
7cadc9076121297428442785536ba0df2d4ae996

SHA256
c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f

SHA512
4183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\f801950a962ddba14caaa44bf084b55c.exe

Filesize
3.2MB

MD5
f801950a962ddba14caaa44bf084b55c

SHA1
7cadc9076121297428442785536ba0df2d4ae996

SHA256
c3946ec89e15b24b743c46f9acacb58cff47da63f3ce2799d71ed90496b8891f

SHA512
4183bc76bdc84fb779e2e573d9a63d7de47096b63b945f9e335bee95ae28eb208f5ee15f6501ac59623b97c5b77f3455ca313512e7d9803e1704ae22a52459c5

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe

Filesize
281KB

MD5
d98e33b66343e7c96158444127a117f6

SHA1
bb716c5509a2bf345c6c1152f6e3e1452d39d50d

SHA256
5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

SHA512
705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

Download Submit
C:\Users\Admin\AppData\Local\Temp\csrss\injector\injector.exe

Filesize
281KB

MD5
d98e33b66343e7c96158444127a117f6

SHA1
bb716c5509a2bf345c6c1152f6e3e1452d39d50d

SHA256
5de4e2b07a26102fe527606ce5da1d5a4b938967c9d380a3c5fe86e2e34aaaf1

SHA512
705275e4a1ba8205eb799a8cf1737bc8ba686925e52c9198a6060a7abeee65552a85b814ac494a4b975d496a63be285f19a6265550585f2fc85824c42d7efab5

Download Submit
C:\Windows\rss\csrss.exe

Filesize
4.1MB

MD5
be3e4ff45023420855bca037e9a86548

SHA1
8a7884f774084478ddf4075b84d7bc9f0ecf9cae

SHA256
769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c

SHA512
3d6b840ee3a93891cf6a6d6e940fb14e57e437d8d40bebc38e9b035733989be8d96674cff5a0e9fd7f739790d4bad03d67794705cf2ef51b60601cc2202dfccd

Download Submit
C:\Windows\rss\csrss.exe

Filesize
4.1MB

MD5
be3e4ff45023420855bca037e9a86548

SHA1
8a7884f774084478ddf4075b84d7bc9f0ecf9cae

SHA256
769fa4426113af9fd11509a6fcf22bda363d1b509b5ef37e7c0dacb3dfe92d1c

SHA512
3d6b840ee3a93891cf6a6d6e940fb14e57e437d8d40bebc38e9b035733989be8d96674cff5a0e9fd7f739790d4bad03d67794705cf2ef51b60601cc2202dfccd

Download Submit
memory/1032-142-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-153-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-148-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-150-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-151-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-152-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-167-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-154-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-155-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-156-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-157-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-158-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-159-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-160-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/1752-149-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/3816-166-0x0000000000400000-0x0000000000C25000-memory.dmp

Filesize
8.1MB

Download
memory/4828-135-0x0000000000400000-0x0000000000C91000-memory.dmp

Filesize
8.6MB

Download
memory/4828-134-0x0000000002E30000-0x00000000036A7000-memory.dmp

Filesize
8.5MB

Download