xworm | 12dc0a56caae75015dfee9c04bb256ae494341aab3e2f8456e028564695c9c97

General

Target

4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe
Size

116KB
MD5

4f0c8a81138b78a1f40ef1d383632130
SHA1

96b6c6ff5c5b1aa90014e975bb851d23acbed598
SHA256

4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42
SHA512

687dddf2a070acbb5eee3af912dc1461968a67b05992f76f5a77a5bb0d773ae1049c7e44386c4a44d5971ace7784a8601c2fc3f47f1f8dbbb06a7e04646bbf1c
SSDEEP

3072:oziOToQz31V4b1pCoLd7H7dwsIc6rmGBLYdLrfncO:+ToQzFjox7bCs5WmGVYVrfn

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

left-noon.gl.at.ply.gg:60705

Attributes

Install_directory
%AppData%
install_file
US11B.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023b5f-7.dat	family_xworm
behavioral2/memory/3248-10-0x0000000000280000-0x000000000029A000-memory.dmp	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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3116	powershell.exe
3276	powershell.exe
4784	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	sms737A.tmp

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sms737A.lnk	sms737A.tmp
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sms737A.lnk	sms737A.tmp

Executes dropped EXE 1 IoCs

pid	Process
3248	sms737A.tmp

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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sms737A = "C:\\Users\\Admin\\AppData\\Roaming\\sms737A.tmp"	sms737A.tmp

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
11	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4692 set thread context of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	OpenWith.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
4364	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3116	powershell.exe
3116	powershell.exe
3276	powershell.exe
3276	powershell.exe
4784	powershell.exe
4784	powershell.exe
3248	sms737A.tmp

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3248	sms737A.tmp
Token: SeDebugPrivilege	3116	powershell.exe
Token: SeDebugPrivilege	3276	powershell.exe
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	3248	sms737A.tmp

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3248	sms737A.tmp
1084	OpenWith.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 4692 wrote to memory of 2708	4692	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	84
PID 2708 wrote to memory of 3248	2708	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	85
PID 2708 wrote to memory of 3248	2708	4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe	85
PID 3248 wrote to memory of 3116	3248	sms737A.tmp	92
PID 3248 wrote to memory of 3116	3248	sms737A.tmp	92
PID 3248 wrote to memory of 3276	3248	sms737A.tmp	96
PID 3248 wrote to memory of 3276	3248	sms737A.tmp	96
PID 3248 wrote to memory of 4784	3248	sms737A.tmp	100
PID 3248 wrote to memory of 4784	3248	sms737A.tmp	100
PID 3248 wrote to memory of 4364	3248	sms737A.tmp	102
PID 3248 wrote to memory of 4364	3248	sms737A.tmp	102

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\4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe
"C:\Users\Admin\AppData\Local\Temp\4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4692
- C:\Users\Admin\AppData\Local\Temp\4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe
  "C:\Users\Admin\AppData\Local\Temp\4560c263255a3f4682b69a3e989591ee4b4df60a8a7680a3905c0c7b33a83d42.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Users\Admin\AppData\Local\Temp\sms737A.tmp
    "C:\Users\Admin\AppData\Local\Temp\sms737A.tmp"
    3⤵
    - Checks computer location settings
    - Drops startup file
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3248
  - - 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\sms737A.tmp'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3116
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'sms737A.tmp'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3276
  - - 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\sms737A.tmp'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4784
  - - C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "sms737A" /tr "C:\Users\Admin\AppData\Roaming\sms737A.tmp"
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4364

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe "C:\Users\Admin\AppData\Roaming\sms737A.tmp"
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:1084

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\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
5cfe303e798d1cc6c1dab341e7265c15

SHA1
cd2834e05191a24e28a100f3f8114d5a7708dc7c

SHA256
c4d16552769ca1762f6867bce85589c645ac3dc490b650083d74f853f898cfab

SHA512
ef151bbe0033a2caf2d40aff74855a3f42c8171e05a11c8ce93c7039d9430482c43fe93d9164ee94839aff253cad774dbf619dde9a8af38773ca66d59ac3400e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ytbc3rlh.hrl.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\sms737A.tmp

Filesize
77KB

MD5
8032a5e68376a879472c297749cdb4c4

SHA1
d6a96c5287f1d76b41f605ecaeb1688d208c720a

SHA256
fa3dd88248218cd597232333c70e0996801817b003c234994102452712a23d1d

SHA512
b75d6429844e643fc7920efe1d30b15b0e631ded561f5f0021e105a68a729ebf308a23501c9136efbf4637bb068dba5c0056ff85195cd54d56e05205193d6c21

Download Submit
memory/2708-0-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2708-2-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/2708-3-0x0000000000400000-0x0000000000419000-memory.dmp

Filesize
100KB

Download
memory/3116-12-0x00007FFDD2E40000-0x00007FFDD3901000-memory.dmp

Filesize
10.8MB

Download
memory/3116-13-0x00007FFDD2E40000-0x00007FFDD3901000-memory.dmp

Filesize
10.8MB

Download
memory/3116-23-0x000001F2EE9A0000-0x000001F2EE9C2000-memory.dmp

Filesize
136KB

Download
memory/3116-24-0x00007FFDD2E40000-0x00007FFDD3901000-memory.dmp

Filesize
10.8MB

Download
memory/3116-27-0x00007FFDD2E40000-0x00007FFDD3901000-memory.dmp

Filesize
10.8MB

Download
memory/3248-11-0x00007FFDD2E40000-0x00007FFDD3901000-memory.dmp

Filesize
10.8MB

Download
memory/3248-10-0x0000000000280000-0x000000000029A000-memory.dmp

Filesize
104KB

Download
memory/3248-9-0x00007FFDD2E43000-0x00007FFDD2E45000-memory.dmp

Filesize
8KB

Download
memory/3248-58-0x00007FFDD2E40000-0x00007FFDD3901000-memory.dmp

Filesize
10.8MB

Download
memory/4692-4-0x00007FF631340000-0x00007FF63136A000-memory.dmp

Filesize
168KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads