xworm | 3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3

General

Target

3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe
Size

82KB
MD5

091f5b8bf3c5272388d483d5d5ce9fcb
SHA1

1d077bacc1a522319efbc6a0d303c2afcb579849
SHA256

3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3
SHA512

3f046a85cc5960de1d80b47daced9615a5ffb20f1ff432804096bef3937f757c3b90a8f2d4119e2b0d1941d1e29f75255a5d1e90c98ad7781da4c03d3d8a3c3d
SSDEEP

1536:Nz9Nkxe0BO7PC8Kk0ycbrjUiKkwYX863w3NOW9JYUoB9:ZDkwwk0bbnUiKTdOICB9

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.23:36343

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/556-1-0x00000000001C0000-0x00000000001DA000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023c93-59.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
1796	powershell.exe
2436	powershell.exe
4972	powershell.exe
3220	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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client Server Runtime Process.lnk	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Client Server Runtime Process.lnk	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe

Executes dropped EXE 2 IoCs

pid	Process
1964	Client Server Runtime Process
3300	Client Server Runtime Process

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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Client Server Runtime Process = "C:\\ProgramData\\Client Server Runtime Process"	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.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
3208	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4972	powershell.exe
4972	powershell.exe
3220	powershell.exe
3220	powershell.exe
1796	powershell.exe
1796	powershell.exe
2436	powershell.exe
2436	powershell.exe
556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe
Token: SeDebugPrivilege	4972	powershell.exe
Token: SeDebugPrivilege	3220	powershell.exe
Token: SeDebugPrivilege	1796	powershell.exe
Token: SeDebugPrivilege	2436	powershell.exe
Token: SeDebugPrivilege	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe
Token: SeDebugPrivilege	1964	Client Server Runtime Process
Token: SeDebugPrivilege	3300	Client Server Runtime Process

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 556 wrote to memory of 4972	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	87
PID 556 wrote to memory of 4972	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	87
PID 556 wrote to memory of 3220	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	89
PID 556 wrote to memory of 3220	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	89
PID 556 wrote to memory of 1796	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	91
PID 556 wrote to memory of 1796	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	91
PID 556 wrote to memory of 2436	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	93
PID 556 wrote to memory of 2436	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	93
PID 556 wrote to memory of 3208	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	95
PID 556 wrote to memory of 3208	556	3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe	95

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\3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe
"C:\Users\Admin\AppData\Local\Temp\3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:556
- 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\3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3220
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Client Server Runtime Process'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1796
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Client Server Runtime Process'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2436
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Client Server Runtime Process" /tr "C:\ProgramData\Client Server Runtime Process"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3208

C:\ProgramData\Client Server Runtime Process
"C:\ProgramData\Client Server Runtime Process"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1964

C:\ProgramData\Client Server Runtime Process
"C:\ProgramData\Client Server Runtime Process"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3300

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:\ProgramData\Client Server Runtime Process

Filesize
82KB

MD5
091f5b8bf3c5272388d483d5d5ce9fcb

SHA1
1d077bacc1a522319efbc6a0d303c2afcb579849

SHA256
3fa56993244dfb36526495c3d9e8016381e6c2b521ee24471d8731a755a625c3

SHA512
3f046a85cc5960de1d80b47daced9615a5ffb20f1ff432804096bef3937f757c3b90a8f2d4119e2b0d1941d1e29f75255a5d1e90c98ad7781da4c03d3d8a3c3d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client Server Runtime Process.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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
944B

MD5
120c6c9af4de2accfcff2ed8c3aab1af

SHA1
504f64ae4ac9c4fe308a6a50be24fe464f3dad95

SHA256
461315e4057c3fa4d0031df3f7e6511914f082698b6c41f5c2ada831ceffb222

SHA512
041712168718dff702da8203b4089b2e57db98ce503b8ecf36809dec0cd7a595a0d427caa960bc1bd29cbedc85ad3262773f2077a476b85aca387d48f7b07ba2

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

Filesize
944B

MD5
b51dc9e5ec3c97f72b4ca9488bbb4462

SHA1
5c1e8c0b728cd124edcacefb399bbd5e25b21bd3

SHA256
976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db

SHA512
0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_k3oq2awt.sjz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/556-1-0x00000000001C0000-0x00000000001DA000-memory.dmp

Filesize
104KB

Download
memory/556-2-0x00007FF9D97A0000-0x00007FF9DA261000-memory.dmp

Filesize
10.8MB

Download
memory/556-0-0x00007FF9D97A3000-0x00007FF9D97A5000-memory.dmp

Filesize
8KB

Download
memory/556-57-0x00007FF9D97A0000-0x00007FF9DA261000-memory.dmp

Filesize
10.8MB

Download
memory/556-56-0x00007FF9D97A3000-0x00007FF9D97A5000-memory.dmp

Filesize
8KB

Download
memory/4972-13-0x000001DCCE400000-0x000001DCCE422000-memory.dmp

Filesize
136KB

Download
memory/4972-18-0x00007FF9D97A0000-0x00007FF9DA261000-memory.dmp

Filesize
10.8MB

Download
memory/4972-15-0x00007FF9D97A0000-0x00007FF9DA261000-memory.dmp

Filesize
10.8MB

Download
memory/4972-14-0x00007FF9D97A0000-0x00007FF9DA261000-memory.dmp

Filesize
10.8MB

Download
memory/4972-3-0x00007FF9D97A0000-0x00007FF9DA261000-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