xworm | e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

General

Target

XClient (1).exe
Size

41KB
MD5

8ac12cc24b5ac76188fe9612dc51777e
SHA1

0c0dddf34dbf7b95e82c58fdb7cfabb80db90430
SHA256

e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654
SHA512

02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93
SSDEEP

768:LrJDweBDuOkScrbsN/x6WECAr43MkfJF5Pa9p+U6iOwhF3/ibK:pDwewicrbsN/YDRr4RF49IU6iOwv6G

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

57.128.132.221:7000

Mutex

A0pVR4huor1J3yZ3

Attributes

Install_directory
%AppData%
install_file
Win32runtime.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/memory/3056-1-0x00000000008F0000-0x0000000000900000-memory.dmp	family_xworm
behavioral3/files/0x000b000000023cbb-64.dat	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4840	powershell.exe
2688	powershell.exe
1620	powershell.exe
2900	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	XClient (1).exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe

Executes dropped EXE 2 IoCs

pid	Process
1572	Win32runtime.exe
1400	Win32runtime.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-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Win32runtime = "C:\\Users\\Admin\\AppData\\Roaming\\Win32runtime.exe"	XClient (1).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.

flow	ioc
12	ip-api.com

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
864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4840	powershell.exe
4840	powershell.exe
2688	powershell.exe
2688	powershell.exe
1620	powershell.exe
1620	powershell.exe
2900	powershell.exe
2900	powershell.exe
3056	XClient (1).exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	XClient (1).exe
Token: SeDebugPrivilege	4840	powershell.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	1620	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe
Token: SeDebugPrivilege	3056	XClient (1).exe
Token: SeDebugPrivilege	1572	Win32runtime.exe
Token: SeDebugPrivilege	1400	Win32runtime.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3056	XClient (1).exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 4840	3056	XClient (1).exe	98
PID 3056 wrote to memory of 4840	3056	XClient (1).exe	98
PID 3056 wrote to memory of 2688	3056	XClient (1).exe	102
PID 3056 wrote to memory of 2688	3056	XClient (1).exe	102
PID 3056 wrote to memory of 1620	3056	XClient (1).exe	104
PID 3056 wrote to memory of 1620	3056	XClient (1).exe	104
PID 3056 wrote to memory of 2900	3056	XClient (1).exe	106
PID 3056 wrote to memory of 2900	3056	XClient (1).exe	106
PID 3056 wrote to memory of 864	3056	XClient (1).exe	108
PID 3056 wrote to memory of 864	3056	XClient (1).exe	108

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 (1).exe
"C:\Users\Admin\AppData\Local\Temp\XClient (1).exe"
1⤵
- Checks computer location settings
- 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:3056
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4840
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2688
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1620
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Win32runtime" /tr "C:\Users\Admin\AppData\Roaming\Win32runtime.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:864

C:\Users\Admin\AppData\Roaming\Win32runtime.exe
C:\Users\Admin\AppData\Roaming\Win32runtime.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1572

C:\Users\Admin\AppData\Roaming\Win32runtime.exe
C:\Users\Admin\AppData\Roaming\Win32runtime.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Win32runtime.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
a7cc007980e419d553568a106210549a

SHA1
c03099706b75071f36c3962fcc60a22f197711e0

SHA256
a5735921fc72189c8bf577f3911486cf031708dc8d6bc764fe3e593c0a053165

SHA512
b9aaf29403c467daef80a1ae87478afc33b78f4e1ca16189557011bb83cf9b3e29a0f85c69fa209c45201fb28baca47d31756eee07b79c6312c506e8370f7666

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

Filesize
944B

MD5
d79d1bd60b7247fd284d8602d6e69c14

SHA1
597f223c49c70fe13d0b4e5440dd3b9a998c89e0

SHA256
45903c738ea99da02de9bc04177db4e702574ff7b8b448016f107b769079e553

SHA512
a3f38b9ac86f8c7a93129502bc4f08aee02eaee70f41fb602c34a1c76562b5cca314c15727e01a73643cf17f5337a7b8f98da379860d139aabbd68e485251b09

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mebjr3gp.4y3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Win32runtime.exe

Filesize
41KB

MD5
8ac12cc24b5ac76188fe9612dc51777e

SHA1
0c0dddf34dbf7b95e82c58fdb7cfabb80db90430

SHA256
e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

SHA512
02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93

Download Submit
memory/1620-47-0x0000018B69480000-0x0000018B6969C000-memory.dmp

Filesize
2.1MB

Download
memory/2688-35-0x0000028851D50000-0x0000028851F6C000-memory.dmp

Filesize
2.1MB

Download
memory/3056-0-0x00007FFBBD683000-0x00007FFBBD685000-memory.dmp

Filesize
8KB

Download
memory/3056-4-0x00007FFBBD680000-0x00007FFBBE141000-memory.dmp

Filesize
10.8MB

Download
memory/3056-3-0x00007FFBBD683000-0x00007FFBBD685000-memory.dmp

Filesize
8KB

Download
memory/3056-2-0x00007FFBBD680000-0x00007FFBBE141000-memory.dmp

Filesize
10.8MB

Download
memory/3056-1-0x00000000008F0000-0x0000000000900000-memory.dmp

Filesize
64KB

Download
memory/4840-10-0x000002021BCB0000-0x000002021BCD2000-memory.dmp

Filesize
136KB

Download
memory/4840-22-0x00007FFBBD680000-0x00007FFBBE141000-memory.dmp

Filesize
10.8MB

Download
memory/4840-21-0x000002021BD30000-0x000002021BF4C000-memory.dmp

Filesize
2.1MB

Download
memory/4840-20-0x000002021BCE0000-0x000002021BD28000-memory.dmp

Filesize
288KB

Download
memory/4840-15-0x00007FFBBD680000-0x00007FFBBE141000-memory.dmp

Filesize
10.8MB

Download
memory/4840-17-0x00007FFBBD680000-0x00007FFBBE141000-memory.dmp

Filesize
10.8MB

Download
memory/4840-16-0x00007FFBBD680000-0x00007FFBBE141000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads