xworm | 56fdcda181b91eff9f4d42e07decd69028890447301dd07e871e1bf320b24c31

General

Target

XClient.exe
Size

59KB
MD5

959192f310b70b735c760587e82cb8ab
SHA1

7841a747d5797ed18bd6c3157e899ba22a374101
SHA256

56fdcda181b91eff9f4d42e07decd69028890447301dd07e871e1bf320b24c31
SHA512

1e20e872a1c9beaaf242c4525623388e4c0ed8961ae806044be33e74278d448ab8a95acd9da68592e079a71e07db7183cf0327fa20618694c017e3100522253d
SSDEEP

768:IyZLhJJzcdVrrnZTptA1STNvdBgWYd/bMOV/Qiaj3Y4wp6jYOFThfZ+S0:IyZLfZGrV4STT7sbpV/w3w60O1jP0

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

board-tigers.gl.at.ply.gg:17833

Attributes

Install_directory
%AppData%
install_file
keyauth.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4480-1-0x0000000000AC0000-0x0000000000AD6000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023c76-58.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
116	powershell.exe
1808	powershell.exe
712	powershell.exe
2304	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4836	keyauth.exe
4892	keyauth.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\keyauth = "C:\\Users\\Admin\\AppData\\Roaming\\keyauth.exe"	XClient.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
15	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
3240	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
116	powershell.exe
116	powershell.exe
1808	powershell.exe
1808	powershell.exe
712	powershell.exe
712	powershell.exe
2304	powershell.exe
2304	powershell.exe
4480	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4480	XClient.exe
Token: SeDebugPrivilege	116	powershell.exe
Token: SeDebugPrivilege	1808	powershell.exe
Token: SeDebugPrivilege	712	powershell.exe
Token: SeDebugPrivilege	2304	powershell.exe
Token: SeDebugPrivilege	4480	XClient.exe
Token: SeDebugPrivilege	4836	keyauth.exe
Token: SeDebugPrivilege	4892	keyauth.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4480	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 116	4480	XClient.exe	88
PID 4480 wrote to memory of 116	4480	XClient.exe	88
PID 4480 wrote to memory of 1808	4480	XClient.exe	90
PID 4480 wrote to memory of 1808	4480	XClient.exe	90
PID 4480 wrote to memory of 712	4480	XClient.exe	92
PID 4480 wrote to memory of 712	4480	XClient.exe	92
PID 4480 wrote to memory of 2304	4480	XClient.exe	94
PID 4480 wrote to memory of 2304	4480	XClient.exe	94
PID 4480 wrote to memory of 3240	4480	XClient.exe	96
PID 4480 wrote to memory of 3240	4480	XClient.exe	96

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⤵
- 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:4480
- 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.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:116
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1808
- 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\keyauth.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:712
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'keyauth.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2304
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "keyauth" /tr "C:\Users\Admin\AppData\Roaming\keyauth.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3240

C:\Users\Admin\AppData\Roaming\keyauth.exe
C:\Users\Admin\AppData\Roaming\keyauth.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4836

C:\Users\Admin\AppData\Roaming\keyauth.exe
C:\Users\Admin\AppData\Roaming\keyauth.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4892

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\keyauth.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
59d97011e091004eaffb9816aa0b9abd

SHA1
1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

SHA256
18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

SHA512
d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

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

Filesize
944B

MD5
cae60f0ddddac635da71bba775a2c5b4

SHA1
386f1a036af61345a7d303d45f5230e2df817477

SHA256
b2dd636b7b0d3bfe44cef5e1175828b1fa7bd84d5563f54342944156ba996c16

SHA512
28ed8a8bc132ef56971cfd7b517b17cdb74a7f8c247ef6bff232996210075e06aa58a415825a1e038cfb547ad3dc6882bf1ca1b68c5b360ef0512a1440850253

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

Filesize
944B

MD5
cc19bcff372d20459d3651ba8aef50e7

SHA1
3c6f1d4cdd647864fb97a16b1aefba67fcee11f7

SHA256
366473e774d8976c7fd4dc582220666fb61a4feb3f7c95e69b2a68ad9e446ec9

SHA512
a0e360ca4b6e874fd44612bf4b17f3722c0619da4f6bade12a62efadae88c2d33460114eaafa2bc3fb1cef5bea07e745b8bee24f15d0cacaff5f4a521b225080

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3o1enrtv.o1o.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
59KB

MD5
959192f310b70b735c760587e82cb8ab

SHA1
7841a747d5797ed18bd6c3157e899ba22a374101

SHA256
56fdcda181b91eff9f4d42e07decd69028890447301dd07e871e1bf320b24c31

SHA512
1e20e872a1c9beaaf242c4525623388e4c0ed8961ae806044be33e74278d448ab8a95acd9da68592e079a71e07db7183cf0327fa20618694c017e3100522253d

Download Submit
memory/116-14-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

Filesize
10.8MB

Download
memory/116-15-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

Filesize
10.8MB

Download
memory/116-18-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

Filesize
10.8MB

Download
memory/116-13-0x000001FD00000000-0x000001FD00022000-memory.dmp

Filesize
136KB

Download
memory/116-3-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

Filesize
10.8MB

Download
memory/4480-0-0x00007FFEAFD03000-0x00007FFEAFD05000-memory.dmp

Filesize
8KB

Download
memory/4480-2-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

Filesize
10.8MB

Download
memory/4480-57-0x00007FFEAFD00000-0x00007FFEB07C1000-memory.dmp

Filesize
10.8MB

Download
memory/4480-1-0x0000000000AC0000-0x0000000000AD6000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads