xworm | 9271cc1d1de56861488f97a6c38b4175fda1d31992bf3349aad46f79c3d6f0a6

General

Target

xclant.exe
Size

70KB
MD5

be02e2396810bc407f7ada8d02c588c1
SHA1

77c1f21128308f766fc4b359c48e63c146beca52
SHA256

9271cc1d1de56861488f97a6c38b4175fda1d31992bf3349aad46f79c3d6f0a6
SHA512

cefdd672a809016390157cd4ca9072284746e1082bfbc761f93da7b8c240244e981e739370787dfe1d9c45fce1a6bd9f990c65957411649beea2d908ecc4c907
SSDEEP

1536:zOs8dJha3EWE70GlLsAo/j5b6ybuXjGs6X9mObkU83:zOBdXQlIxo75b6fXjW9mObkn3

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.19:22298

Attributes

Install_directory
%AppData%
install_file
SystemUser32.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4888-1-0x0000000000150000-0x0000000000168000-memory.dmp	family_xworm
behavioral2/files/0x0039000000023b70-59.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
4040	powershell.exe
5016	powershell.exe
688	powershell.exe
4916	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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	xclant.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUser32.lnk	xclant.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUser32.lnk	xclant.exe

Executes dropped EXE 2 IoCs

pid	Process
2868	SystemUser32.exe
752	SystemUser32.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-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SystemUser32 = "C:\\Users\\Admin\\AppData\\Roaming\\SystemUser32.exe"	xclant.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
4060	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4916	powershell.exe
4916	powershell.exe
4040	powershell.exe
4040	powershell.exe
5016	powershell.exe
5016	powershell.exe
688	powershell.exe
688	powershell.exe
4888	xclant.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4888	xclant.exe
Token: SeDebugPrivilege	4916	powershell.exe
Token: SeDebugPrivilege	4040	powershell.exe
Token: SeDebugPrivilege	5016	powershell.exe
Token: SeDebugPrivilege	688	powershell.exe
Token: SeDebugPrivilege	4888	xclant.exe
Token: SeDebugPrivilege	2868	SystemUser32.exe
Token: SeDebugPrivilege	752	SystemUser32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4888	xclant.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4888 wrote to memory of 4916	4888	xclant.exe	90
PID 4888 wrote to memory of 4916	4888	xclant.exe	90
PID 4888 wrote to memory of 4040	4888	xclant.exe	93
PID 4888 wrote to memory of 4040	4888	xclant.exe	93
PID 4888 wrote to memory of 5016	4888	xclant.exe	95
PID 4888 wrote to memory of 5016	4888	xclant.exe	95
PID 4888 wrote to memory of 688	4888	xclant.exe	97
PID 4888 wrote to memory of 688	4888	xclant.exe	97
PID 4888 wrote to memory of 4060	4888	xclant.exe	99
PID 4888 wrote to memory of 4060	4888	xclant.exe	99

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\xclant.exe
"C:\Users\Admin\AppData\Local\Temp\xclant.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:4888
- 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\xclant.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4916
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xclant.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4040
- 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\SystemUser32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5016
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SystemUser32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:688
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SystemUser32" /tr "C:\Users\Admin\AppData\Roaming\SystemUser32.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4060

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2868

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:752

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\SystemUser32.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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

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\Temp\__PSScriptPolicyTest_2ij25voc.ic3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SystemUser32.exe

Filesize
70KB

MD5
be02e2396810bc407f7ada8d02c588c1

SHA1
77c1f21128308f766fc4b359c48e63c146beca52

SHA256
9271cc1d1de56861488f97a6c38b4175fda1d31992bf3349aad46f79c3d6f0a6

SHA512
cefdd672a809016390157cd4ca9072284746e1082bfbc761f93da7b8c240244e981e739370787dfe1d9c45fce1a6bd9f990c65957411649beea2d908ecc4c907

Download Submit
memory/4888-1-0x0000000000150000-0x0000000000168000-memory.dmp

Filesize
96KB

Download
memory/4888-2-0x00007FF857360000-0x00007FF857E21000-memory.dmp

Filesize
10.8MB

Download
memory/4888-0-0x00007FF857363000-0x00007FF857365000-memory.dmp

Filesize
8KB

Download
memory/4888-58-0x00007FF857360000-0x00007FF857E21000-memory.dmp

Filesize
10.8MB

Download
memory/4888-57-0x00007FF857363000-0x00007FF857365000-memory.dmp

Filesize
8KB

Download
memory/4916-13-0x00007FF857360000-0x00007FF857E21000-memory.dmp

Filesize
10.8MB

Download
memory/4916-18-0x00007FF857360000-0x00007FF857E21000-memory.dmp

Filesize
10.8MB

Download
memory/4916-15-0x00007FF857360000-0x00007FF857E21000-memory.dmp

Filesize
10.8MB

Download
memory/4916-14-0x00007FF857360000-0x00007FF857E21000-memory.dmp

Filesize
10.8MB

Download
memory/4916-3-0x00000198B4250000-0x00000198B4272000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads