xworm | 3039b05a6c40e5400832f3b2ddc88a0b950e37edc88c6955484d5b395fbbcaa6

General

Target

XClient.exe
Size

39KB
MD5

2cb6d864b9841fa655284af27dd03813
SHA1

9cd82b6a2a579c717061ae384e0350aecc81b03a
SHA256

3039b05a6c40e5400832f3b2ddc88a0b950e37edc88c6955484d5b395fbbcaa6
SHA512

319adc49a894ecdd6f524c0e75702c494fe07e0c451fd3b7f32da46586bf8224ff783a2970ed9ec1c389d2e398c43b3c390076a5671c6217aa50a29be122c90b
SSDEEP

768:Uybn+v8csoYSQ5lLJKuuwhSZPypufFWPa9bL6POwhuaubkK:rn+EcsodQVJKuuwhSMEFv9bL6POwETf

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.21:31803:31803

calendar-mhz.gl.at.ply.gg:31803

Mutex

K9AREC0DsGwRG236

Attributes

Install_directory
%LocalAppData%
install_file
XClient.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/5040-1-0x00000000006F0000-0x0000000000700000-memory.dmp	family_xworm
behavioral1/files/0x000d000000023401-58.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1316	powershell.exe
1792	powershell.exe
916	powershell.exe
4680	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-1-5-21-384068567-2943195810-3631207890-1000\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\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe

Executes dropped EXE 1 IoCs

pid	Process
4212	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-1-5-21-384068567-2943195810-3631207890-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\XClient.exe"	XClient.exe

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

pid	Process
1924	timeout.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

pid	Process
4828	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1792	powershell.exe
1792	powershell.exe
916	powershell.exe
916	powershell.exe
4680	powershell.exe
4680	powershell.exe
1316	powershell.exe
1316	powershell.exe
5040	XClient.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	5040	XClient.exe
Token: SeDebugPrivilege	1792	powershell.exe
Token: SeDebugPrivilege	916	powershell.exe
Token: SeDebugPrivilege	4680	powershell.exe
Token: SeDebugPrivilege	1316	powershell.exe
Token: SeDebugPrivilege	5040	XClient.exe
Token: SeDebugPrivilege	4212	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5040	XClient.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 5040 wrote to memory of 1792	5040	XClient.exe	89
PID 5040 wrote to memory of 1792	5040	XClient.exe	89
PID 5040 wrote to memory of 916	5040	XClient.exe	93
PID 5040 wrote to memory of 916	5040	XClient.exe	93
PID 5040 wrote to memory of 4680	5040	XClient.exe	95
PID 5040 wrote to memory of 4680	5040	XClient.exe	95
PID 5040 wrote to memory of 1316	5040	XClient.exe	97
PID 5040 wrote to memory of 1316	5040	XClient.exe	97
PID 5040 wrote to memory of 4828	5040	XClient.exe	100
PID 5040 wrote to memory of 4828	5040	XClient.exe	100
PID 5040 wrote to memory of 4940	5040	XClient.exe	109
PID 5040 wrote to memory of 4940	5040	XClient.exe	109
PID 5040 wrote to memory of 2808	5040	XClient.exe	110
PID 5040 wrote to memory of 2808	5040	XClient.exe	110
PID 2808 wrote to memory of 1924	2808	cmd.exe	113
PID 2808 wrote to memory of 1924	2808	cmd.exe	113

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:5040
- 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:1792
- 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:916
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4680
- 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:1316
- 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\Local\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4828
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "XClient"
  2⤵
  PID:4940
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5F90.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2808
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1924

C:\Users\Admin\AppData\Local\XClient.exe
C:\Users\Admin\AppData\Local\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4212

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\XClient.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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
be5e63276ed49ce1e4d8e6f8c722cf8e

SHA1
373143c33712bd6133ea7685124fa137c6b28baa

SHA256
39d1c27849a93fe087564c8cecd773ffc6a9b965c554094f3b99ce7f54afb1c1

SHA512
825d8d09b455752f9e850495e58d6dc5a7d1ebfd6c02796f452b92c77f67d65c87567d9be1e955e91d6432b95cfd4e6193223a6930453ae2f93c12cae86886f6

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

Filesize
944B

MD5
50d3033f2bc3a3774c469d03e71a79a9

SHA1
22027b1d52085de99b3bffa276530fea5d961471

SHA256
2987e99ec7fa17bd4ab7de3cb4dc62645e1052012a5a357904d6fc6db9054147

SHA512
ecf7ab1a9e4192454a3e24c60453fd702a8c648e00078fc933b9182f4a3d3c10c6f5da622a5729b35727e6ddc8837029caddcaf76f56e805b9744253b56da5d8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ei4c4v33.fhy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp5F90.tmp.bat

Filesize
159B

MD5
ac2b43f14a818a1b2769ccca9699a397

SHA1
80a0c6453ce0b5d0d233c3092eafb27ae3cd510c

SHA256
1ea34d6f27b6889f4673fc06ab9891e2cdd4804ddd4475430afc3402c885f548

SHA512
b4fd67fd787f5dc54b6ed07d5aebd3ae04b7369989d7b483dd78edbf6a8aa5778f4183944cdf6f35b995292e523f9b2684c525b1389d80b3714131e695172e07

Download Submit
C:\Users\Admin\AppData\Local\XClient.exe

Filesize
39KB

MD5
2cb6d864b9841fa655284af27dd03813

SHA1
9cd82b6a2a579c717061ae384e0350aecc81b03a

SHA256
3039b05a6c40e5400832f3b2ddc88a0b950e37edc88c6955484d5b395fbbcaa6

SHA512
319adc49a894ecdd6f524c0e75702c494fe07e0c451fd3b7f32da46586bf8224ff783a2970ed9ec1c389d2e398c43b3c390076a5671c6217aa50a29be122c90b

Download Submit
memory/1792-12-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/1792-17-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/1792-14-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/1792-13-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/1792-7-0x0000025D7A540000-0x0000025D7A562000-memory.dmp

Filesize
136KB

Download
memory/5040-56-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/5040-57-0x00007FF86A553000-0x00007FF86A555000-memory.dmp

Filesize
8KB

Download
memory/5040-0-0x00007FF86A553000-0x00007FF86A555000-memory.dmp

Filesize
8KB

Download
memory/5040-61-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/5040-67-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/5040-1-0x00000000006F0000-0x0000000000700000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads