xworm | 2716cfd0d3479d42e903bd0c835b91fd5918a02fb63bdc1b52f73921bf4b307a

General

Target

GxMBK.exe
Size

1.6MB
MD5

049b7a8f84d8c8e7932bfc6e97362c30
SHA1

f3d85b5214062a92ecacd0a65e02593e44ab188a
SHA256

2716cfd0d3479d42e903bd0c835b91fd5918a02fb63bdc1b52f73921bf4b307a
SHA512

eb0c58f723a9c6a2d3d29b10f89538845cfbdaa2d4579de4238a0753050154dacc7832cc20f858b757fd6a2e491b5f775262f670309b7691437910c59a106924
SSDEEP

24576:bYO8wJFOtz7uuqEP+1MoIpgpgi2esTTPfQHSvMYdihbjct3sP8ZS3pdWMhLaw:koqAI4sTTP4smZ58wl

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7000

Mutex

TU53fgvTBLouBDSy

Attributes

install_file
USB.exe

aes.plain

Signatures

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Drops startup file 1 IoCs

Processes:

GxMBK.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%startupname%.lnk GxMBK.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

GxMBK.exe

description pid process target process

PID 1652 set thread context of 1240 1652 GxMBK.exe schtasks.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\%startupname%.lnk	GxMBK.exe

description	pid	process	target process
PID 1652 set thread context of 1240	1652	GxMBK.exe	schtasks.exe

Modifies Internet Explorer settings 1 TTPs 36 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "381968771"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive\{DB7D83F1-A1B5-11ED-8487-72F0FB4431DC} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Zoom	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\SearchScopes\DownloadRetries = "2"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = a0a4e2b4c235d901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\InternetRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Toolbar	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\MFV = 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	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\BrowserEmulation\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\IntelliForms	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb01000000fbec07815684004d899a318f710de6af00000000020000000000106600000001000020000000ba36434860b40e057f125c515b8f96074ecbf84f030b6353994eccb0eb2bd18e000000000e8000000002000020000000efde53a6d7993023547b1a5c417ab4fefa7e1dfd59adab65ba2e1c267cd913d2200000000ebb33eeeb2f8900cdf78f44432c1fc1a701aaeb4f003b697a382ce27664dced40000000945251b1e8bb499a27fa045fc07b3b6dd2012cc126823db23a73f5d184abc76c783f4c8c094b3d931ef6b08d38a524ae97d2cd628b4209f3e40b549be0ddf395	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\SearchScopes	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\LowRegistry	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\PageSetup	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\LowRegistry\DontShowMeThisDialogAgain	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\GPU	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\IETld\LowMic	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\LowRegistry\DOMStorage	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

iexplore.exe

pid process

1172 iexplore.exe
Suspicious use of SetWindowsHookEx 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

1172 iexplore.exe
1172 iexplore.exe
1736 IEXPLORE.EXE
1736 IEXPLORE.EXE
1736 IEXPLORE.EXE
1736 IEXPLORE.EXE

pid	process
1172	iexplore.exe

pid	process
1172	iexplore.exe
1172	iexplore.exe
1736	IEXPLORE.EXE
1736	IEXPLORE.EXE
1736	IEXPLORE.EXE
1736	IEXPLORE.EXE

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

GxMBK.exeschtasks.exeiexplore.exe

description	pid	process	target process
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1652 wrote to memory of 1240	1652	GxMBK.exe	schtasks.exe
PID 1240 wrote to memory of 1172	1240	schtasks.exe	iexplore.exe
PID 1240 wrote to memory of 1172	1240	schtasks.exe	iexplore.exe
PID 1240 wrote to memory of 1172	1240	schtasks.exe	iexplore.exe
PID 1240 wrote to memory of 1172	1240	schtasks.exe	iexplore.exe
PID 1172 wrote to memory of 1736	1172	iexplore.exe	IEXPLORE.EXE
PID 1172 wrote to memory of 1736	1172	iexplore.exe	IEXPLORE.EXE
PID 1172 wrote to memory of 1736	1172	iexplore.exe	IEXPLORE.EXE
PID 1172 wrote to memory of 1736	1172	iexplore.exe	IEXPLORE.EXE

C:\Users\Admin\AppData\Local\Temp\GxMBK.exe
"C:\Users\Admin\AppData\Local\Temp\GxMBK.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1652

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1240

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" http://go.microsoft.com/fwlink/?prd=11324&pver=4.5&sbp=AppLaunch2&plcid=0x409&o1=SHIM_NOVERSION_FOUND&version=(null)&processName=schtasks.exe&platform=0009&osver=5&isServer=0&shimver=4.0.30319.0
3⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1172

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1172 CREDAT:275457 /prefetch:2
4⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:1736

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\1VLOML3M.txt
Filesize
604B

MD5
29a278a050def85ef3f2f9e16581e8b5

SHA1
6d5acf02a9b25951dac25273e734c5ac4edf558e

SHA256
8c2077f840485434e905af03d8c9380c48e283561e1c2a7968f25ef71ceea4bd

SHA512
feeef1971a0f6fb6669b5965657d2bfaf5de631aadfdc60c67a15aee5d98fd1151622a090f0bbd4f738008cf6946a32f028b116db5b7f85c328d9f68f96f5a19

Download Submit
memory/1240-57-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1240-58-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1240-60-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1240-61-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1240-63-0x000000000040BFCE-mapping.dmp

Download
memory/1240-62-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1240-65-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1240-67-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/1652-54-0x0000000001310000-0x00000000014A8000-memory.dmp

Filesize
1.6MB

Download
memory/1652-55-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download
memory/1652-56-0x0000000005630000-0x000000000576C000-memory.dmp

Filesize
1.2MB

Download

Analysis

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