xworm | 31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d

General

Target

31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe
Size

69KB
MD5

7439cc991a9a756c41153b8e9121baab
SHA1

c62528386e5f62ff2975cc8ed0cad3a7d362e632
SHA256

31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d
SHA512

cbdfd77671884407f8f4bd9c5251df5d8896b29bd004ea52460eda8a222df7492c69572e044376315624220f3ea66de3aff34323ea281591ca2975f90fa6dd51
SSDEEP

1536:dEmkVu+xslqytUTZfJM6htYxrlYCbM1/kCxtD6LOSIcRGPUC:dEZZx8q/fJLtYFZbM1segO3cQ8C

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.23:33942

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/328-1-0x0000000000260000-0x0000000000278000-memory.dmp	family_xworm
behavioral1/files/0x00090000000120f9-10.dat	family_xworm
behavioral1/memory/2632-12-0x00000000010B0000-0x00000000010C8000-memory.dmp	family_xworm
behavioral1/memory/2700-15-0x0000000000090000-0x00000000000A8000-memory.dmp	family_xworm
behavioral1/memory/2212-17-0x0000000000C20000-0x0000000000C38000-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 created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe

Executes dropped EXE 3 IoCs

pid	Process
2632	XClient.exe
2700	XClient.exe
2212	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-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.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
2836	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe
Token: SeDebugPrivilege	328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe
Token: SeDebugPrivilege	2632	XClient.exe
Token: SeDebugPrivilege	2700	XClient.exe
Token: SeDebugPrivilege	2212	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 328 wrote to memory of 2836	328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe	31
PID 328 wrote to memory of 2836	328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe	31
PID 328 wrote to memory of 2836	328	31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe	31
PID 2800 wrote to memory of 2632	2800	taskeng.exe	34
PID 2800 wrote to memory of 2632	2800	taskeng.exe	34
PID 2800 wrote to memory of 2632	2800	taskeng.exe	34
PID 2800 wrote to memory of 2700	2800	taskeng.exe	36
PID 2800 wrote to memory of 2700	2800	taskeng.exe	36
PID 2800 wrote to memory of 2700	2800	taskeng.exe	36
PID 2800 wrote to memory of 2212	2800	taskeng.exe	37
PID 2800 wrote to memory of 2212	2800	taskeng.exe	37
PID 2800 wrote to memory of 2212	2800	taskeng.exe	37

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\31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.exe
"C:\Users\Admin\AppData\Local\Temp\31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d.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:328
- 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:2836

C:\Windows\system32\taskeng.exe
taskeng.exe {4F64AD17-5466-471E-9E7E-C3991BAC8F40} S-1-5-21-2039016743-699959520-214465309-1000:PIDEURYY\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2800
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2632
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2700
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2212

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
69KB

MD5
7439cc991a9a756c41153b8e9121baab

SHA1
c62528386e5f62ff2975cc8ed0cad3a7d362e632

SHA256
31a2b821e933bb193d94438d4a5aa036519535336c936d65b66889fb03164e2d

SHA512
cbdfd77671884407f8f4bd9c5251df5d8896b29bd004ea52460eda8a222df7492c69572e044376315624220f3ea66de3aff34323ea281591ca2975f90fa6dd51

Download Submit
memory/328-0-0x000007FEF5593000-0x000007FEF5594000-memory.dmp

Filesize
4KB

Download
memory/328-1-0x0000000000260000-0x0000000000278000-memory.dmp

Filesize
96KB

Download
memory/328-6-0x000007FEF5590000-0x000007FEF5F7C000-memory.dmp

Filesize
9.9MB

Download
memory/328-7-0x000007FEF5593000-0x000007FEF5594000-memory.dmp

Filesize
4KB

Download
memory/328-8-0x000007FEF5590000-0x000007FEF5F7C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-17-0x0000000000C20000-0x0000000000C38000-memory.dmp

Filesize
96KB

Download
memory/2632-12-0x00000000010B0000-0x00000000010C8000-memory.dmp

Filesize
96KB

Download
memory/2700-15-0x0000000000090000-0x00000000000A8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads