xworm | 4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c

General

Target

4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
Size

63KB
MD5

32a5e227422369d29efe9899fa7f1cf1
SHA1

b8292a2a80b5b78f68b2b2b2b561d2926da81afa
SHA256

4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c
SHA512

1365b519c5e70bab0ca7319c8c0dceb6b428c89a793936e0708732de3fe1d77ea458bb5056fccf55f849a07964e7e937cb55ff2d0f79a464f1926e464ba31ec0
SSDEEP

1536:SIfKqlxoqCjVQVw28BBgdE9rIuVO/KbHEMaDdnYi96jdtOU3iKU:SIfKCxCjj20SdE9EeO/KbHEHRvCtOU3S

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

ii-heavy.gl.at.ply.gg:45541:45541

Attributes

Install_directory
%Userprofile%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/452-1-0x00000000000F0000-0x0000000000106000-memory.dmp	family_xworm
behavioral2/files/0x000d000000023c8c-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
4984	powershell.exe
1408	powershell.exe
2148	powershell.exe
3020	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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe

Executes dropped EXE 2 IoCs

pid	Process
3532	XClient.exe
1552	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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\XClient.exe"	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.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
14	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
4528	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4984	powershell.exe
4984	powershell.exe
1408	powershell.exe
1408	powershell.exe
2148	powershell.exe
2148	powershell.exe
3020	powershell.exe
3020	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
Token: SeDebugPrivilege	4984	powershell.exe
Token: SeDebugPrivilege	1408	powershell.exe
Token: SeDebugPrivilege	2148	powershell.exe
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
Token: SeDebugPrivilege	3532	XClient.exe
Token: SeDebugPrivilege	1552	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4984	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	83
PID 452 wrote to memory of 4984	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	83
PID 452 wrote to memory of 1408	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	85
PID 452 wrote to memory of 1408	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	85
PID 452 wrote to memory of 2148	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	87
PID 452 wrote to memory of 2148	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	87
PID 452 wrote to memory of 3020	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	89
PID 452 wrote to memory of 3020	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	89
PID 452 wrote to memory of 4528	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	91
PID 452 wrote to memory of 4528	452	4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe	91

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\4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe
"C:\Users\Admin\AppData\Local\Temp\4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:452
- 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\4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4984
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1408
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2148
- 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:3020
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4528

C:\Users\Admin\XClient.exe
C:\Users\Admin\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3532

C:\Users\Admin\XClient.exe
C:\Users\Admin\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1552

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kasdbhog.wbw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
63KB

MD5
32a5e227422369d29efe9899fa7f1cf1

SHA1
b8292a2a80b5b78f68b2b2b2b561d2926da81afa

SHA256
4d34cf65213ef8daae214f5b969fd05203e8ab2eb871ba76ba8382950326536c

SHA512
1365b519c5e70bab0ca7319c8c0dceb6b428c89a793936e0708732de3fe1d77ea458bb5056fccf55f849a07964e7e937cb55ff2d0f79a464f1926e464ba31ec0

Download Submit
memory/452-1-0x00000000000F0000-0x0000000000106000-memory.dmp

Filesize
88KB

Download
memory/452-2-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/452-0-0x00007FFE84C83000-0x00007FFE84C85000-memory.dmp

Filesize
8KB

Download
memory/452-57-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4984-4-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4984-18-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4984-8-0x000001E355F80000-0x000001E355FA2000-memory.dmp

Filesize
136KB

Download
memory/4984-5-0x00007FFE84C80000-0x00007FFE85741000-memory.dmp

Filesize
10.8MB

Download
memory/4984-3-0x00007FFE84C80000-0x00007FFE85741000-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