xworm | 355b67101ba439f05337234d028ecba6641db094c6251aee15369f767c12dc3b

Analysis

max time kernel
117s
max time network
117s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 05:31

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General

Target

shexwormonmymemztilliminoxide.exe
Size

41KB
MD5

14f963e28858c6c3f653048a83621c89
SHA1

8c3a1d7d823e19558d80f35b0ee7d88f868ab5c6
SHA256

355b67101ba439f05337234d028ecba6641db094c6251aee15369f767c12dc3b
SHA512

2b6cc20e3b24752120ed007d8f07ba44c38bb964ab76b9dcb9d4f745db82450653dd6b5608812ba1bc325dc9e649ae1fb3600e6ad61565e7046ea4ed199a4bb2
SSDEEP

768:xTFHrDMcksBqaEAOrHA7tF5PM96maOwh23EihHJ:XwcGvAwAxFS96maOwwlx

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

127.0.0.1:38630

147.185.221.19:38630

bay-currencies.gl.at.ply.gg:38630

and-organized.gl.at.ply.gg:38630

community-excess.gl.at.ply.gg:38630

Mutex

TelZ6nrHgxVFZl6W

Attributes

Install_directory
%AppData%
install_file
runbroker.exe

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2416-0-0x00000000000C0000-0x00000000000D0000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\runbroker.exe	family_xworm
behavioral1/memory/1560-12-0x00000000011E0000-0x00000000011F0000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1792 cmd.exe

pid	process
1792	cmd.exe

Drops startup file 2 IoCs

Processes:

shexwormonmymemztilliminoxide.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\runbroker.lnk	shexwormonmymemztilliminoxide.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\runbroker.lnk	shexwormonmymemztilliminoxide.exe

Executes dropped EXE 1 IoCs

Processes:

runbroker.exe

pid process

1560 runbroker.exe

pid	process
1560	runbroker.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

shexwormonmymemztilliminoxide.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\runbroker = "C:\\Users\\Admin\\AppData\\Roaming\\runbroker.exe"	shexwormonmymemztilliminoxide.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

4 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

2672 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2680 timeout.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

shexwormonmymemztilliminoxide.exe

pid process

2416 shexwormonmymemztilliminoxide.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

shexwormonmymemztilliminoxide.exerunbroker.exe

description pid process

Token: SeDebugPrivilege 2416 shexwormonmymemztilliminoxide.exe
Token: SeDebugPrivilege 2416 shexwormonmymemztilliminoxide.exe
Token: SeDebugPrivilege 1560 runbroker.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

shexwormonmymemztilliminoxide.exe

pid process

2416 shexwormonmymemztilliminoxide.exe

flow	ioc
4	ip-api.com

pid	process
2672	schtasks.exe

pid	process
2680	timeout.exe

pid	process
2416	shexwormonmymemztilliminoxide.exe

description	pid	process
Token: SeDebugPrivilege	2416	shexwormonmymemztilliminoxide.exe
Token: SeDebugPrivilege	2416	shexwormonmymemztilliminoxide.exe
Token: SeDebugPrivilege	1560	runbroker.exe

pid	process
2416	shexwormonmymemztilliminoxide.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

shexwormonmymemztilliminoxide.exetaskeng.execmd.exe

description	pid	process	target process
PID 2416 wrote to memory of 2672	2416	shexwormonmymemztilliminoxide.exe	schtasks.exe
PID 2416 wrote to memory of 2672	2416	shexwormonmymemztilliminoxide.exe	schtasks.exe
PID 2416 wrote to memory of 2672	2416	shexwormonmymemztilliminoxide.exe	schtasks.exe
PID 2472 wrote to memory of 1560	2472	taskeng.exe	runbroker.exe
PID 2472 wrote to memory of 1560	2472	taskeng.exe	runbroker.exe
PID 2472 wrote to memory of 1560	2472	taskeng.exe	runbroker.exe
PID 2416 wrote to memory of 2520	2416	shexwormonmymemztilliminoxide.exe	schtasks.exe
PID 2416 wrote to memory of 2520	2416	shexwormonmymemztilliminoxide.exe	schtasks.exe
PID 2416 wrote to memory of 2520	2416	shexwormonmymemztilliminoxide.exe	schtasks.exe
PID 2416 wrote to memory of 1792	2416	shexwormonmymemztilliminoxide.exe	cmd.exe
PID 2416 wrote to memory of 1792	2416	shexwormonmymemztilliminoxide.exe	cmd.exe
PID 2416 wrote to memory of 1792	2416	shexwormonmymemztilliminoxide.exe	cmd.exe
PID 1792 wrote to memory of 2680	1792	cmd.exe	timeout.exe
PID 1792 wrote to memory of 2680	1792	cmd.exe	timeout.exe
PID 1792 wrote to memory of 2680	1792	cmd.exe	timeout.exe

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\shexwormonmymemztilliminoxide.exe
"C:\Users\Admin\AppData\Local\Temp\shexwormonmymemztilliminoxide.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2416

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "runbroker" /tr "C:\Users\Admin\AppData\Roaming\runbroker.exe"
2⤵
- Creates scheduled task(s)
PID:2672

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /delete /f /tn "runbroker"
2⤵
PID:2520

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp15B2.tmp.bat""
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1792

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:2680

C:\Windows\system32\taskeng.exe
taskeng.exe {0A7B15BB-95D2-4E2F-B540-45AC3B12ECEF} S-1-5-21-2248906074-2862704502-246302768-1000:GHPZRGFC\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2472

C:\Users\Admin\AppData\Roaming\runbroker.exe
C:\Users\Admin\AppData\Roaming\runbroker.exe
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1560

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp15B2.tmp.bat
Filesize
181B

MD5
1f2675368a54bb9f91bf785ad6dad238

SHA1
074095a050a84a41da0504fe1f1753f29bf47302

SHA256
722ed289680bf26bbe110a20bce078a41b5da3cf7dedaccba7e8d2d68afb1140

SHA512
db7ab9714f5cce7818dd96eeb83ffd4043bf463195feed983203b8d6e915447bb1061a45a93da9680894952ad5ce516571432cfec140381cb35f9cc645fed26a

Download Submit
C:\Users\Admin\AppData\Roaming\runbroker.exe
Filesize
41KB

MD5
14f963e28858c6c3f653048a83621c89

SHA1
8c3a1d7d823e19558d80f35b0ee7d88f868ab5c6

SHA256
355b67101ba439f05337234d028ecba6641db094c6251aee15369f767c12dc3b

SHA512
2b6cc20e3b24752120ed007d8f07ba44c38bb964ab76b9dcb9d4f745db82450653dd6b5608812ba1bc325dc9e649ae1fb3600e6ad61565e7046ea4ed199a4bb2

Download Submit
memory/1560-12-0x00000000011E0000-0x00000000011F0000-memory.dmp

Filesize
64KB

Download
memory/2416-0-0x00000000000C0000-0x00000000000D0000-memory.dmp

Filesize
64KB

Download
memory/2416-1-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/2416-2-0x000000001B1D0000-0x000000001B250000-memory.dmp

Filesize
512KB

Download
memory/2416-7-0x0000000002140000-0x000000000214C000-memory.dmp

Filesize
48KB

Download
memory/2416-8-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download
memory/2416-13-0x000000001B1D0000-0x000000001B250000-memory.dmp

Filesize
512KB

Download
memory/2416-25-0x000007FEF5CE0000-0x000007FEF66CC000-memory.dmp

Filesize
9.9MB

Download