xworm | 630b2a1ee3471f27100a0937e137b8eb020bda08d8bb8f77dfa6075676443da8

General

Target

XClient.exe
Size

32KB
MD5

61dec39ff827ef9850ed12f932ab22ed
SHA1

0fbf2330c943bdc02078dde76e8abdfe2718f779
SHA256

630b2a1ee3471f27100a0937e137b8eb020bda08d8bb8f77dfa6075676443da8
SHA512

09b2792d136b0a46178d5519cc3516a0910294921cba3f349a8154adbc2d2eb1be3bec6106fba97574c8c128c86963185cafded90443e0df145530bdd363d9cd
SSDEEP

768:FXJVfQAQ/PWNDflzs0rGZFh9A+6O/ho/h+a:FZVfQAMKs0rmFh9A+6O/e8a

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

45.139.196.188:30120

Mutex

LGW1OffJggMqu1JK

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2400-1-0x0000000000BA0000-0x0000000000BAE000-memory.dmp	family_xworm
behavioral1/files/0x000d00000001227d-8.dat	family_xworm
behavioral1/memory/2080-15-0x0000000000210000-0x000000000021E000-memory.dmp	family_xworm
behavioral1/memory/2056-19-0x0000000001100000-0x000000000110E000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2080	XClient.exe
2056	XClient.exe
1100	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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

pid	Process
2776	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2400	XClient.exe
Token: SeDebugPrivilege	2080	XClient.exe
Token: SeDebugPrivilege	2056	XClient.exe
Token: SeDebugPrivilege	1100	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2400 wrote to memory of 2776	2400	XClient.exe	30
PID 2400 wrote to memory of 2776	2400	XClient.exe	30
PID 2400 wrote to memory of 2776	2400	XClient.exe	30
PID 3060 wrote to memory of 2080	3060	taskeng.exe	34
PID 3060 wrote to memory of 2080	3060	taskeng.exe	34
PID 3060 wrote to memory of 2080	3060	taskeng.exe	34
PID 3060 wrote to memory of 2056	3060	taskeng.exe	35
PID 3060 wrote to memory of 2056	3060	taskeng.exe	35
PID 3060 wrote to memory of 2056	3060	taskeng.exe	35
PID 3060 wrote to memory of 1100	3060	taskeng.exe	36
PID 3060 wrote to memory of 1100	3060	taskeng.exe	36
PID 3060 wrote to memory of 1100	3060	taskeng.exe	36

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2776

C:\Windows\system32\taskeng.exe
taskeng.exe {7956666B-0CA6-45A9-8B72-BADBC918EB48} S-1-5-21-1846800975-3917212583-2893086201-1000:ZQABOPWE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2080
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2056
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1100

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
32KB

MD5
61dec39ff827ef9850ed12f932ab22ed

SHA1
0fbf2330c943bdc02078dde76e8abdfe2718f779

SHA256
630b2a1ee3471f27100a0937e137b8eb020bda08d8bb8f77dfa6075676443da8

SHA512
09b2792d136b0a46178d5519cc3516a0910294921cba3f349a8154adbc2d2eb1be3bec6106fba97574c8c128c86963185cafded90443e0df145530bdd363d9cd

Download Submit
memory/2056-19-0x0000000001100000-0x000000000110E000-memory.dmp

Filesize
56KB

Download
memory/2080-15-0x0000000000210000-0x000000000021E000-memory.dmp

Filesize
56KB

Download
memory/2400-0-0x000007FEF6233000-0x000007FEF6234000-memory.dmp

Filesize
4KB

Download
memory/2400-1-0x0000000000BA0000-0x0000000000BAE000-memory.dmp

Filesize
56KB

Download
memory/2400-10-0x000007FEF6230000-0x000007FEF6C1C000-memory.dmp

Filesize
9.9MB

Download
memory/2400-11-0x000007FEF6233000-0x000007FEF6234000-memory.dmp

Filesize
4KB

Download
memory/2400-16-0x000007FEF6230000-0x000007FEF6C1C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads