xworm | 1a1a2ef3e0060ed1cff4c3af265705e04a0b227321946461778c1e81616e770b

General

Target

fuckd.exe
Size

67KB
MD5

ad1e05ad9933986e699e2313a067a02d
SHA1

9e4f60f224eb0957124b62f4836a87105cf2449c
SHA256

1a1a2ef3e0060ed1cff4c3af265705e04a0b227321946461778c1e81616e770b
SHA512

c2de8f0d328b730360e816bf06ed71a8cbdc7d1debe6c1148ec2d97c8aac7c12e6fef8270d6139f46b1ad9c604d3660069c61b18d29df90649e2c9c6f9576da0
SSDEEP

1536:li36LmfKSmF8aczrknSb1bxzAoWFOc6I3YONygapcZ:lqo9SmYMSb1VaYONyMZ

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

period-preview.gl.at.ply.gg:62237

Attributes

Install_directory
%ProgramData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4424-1-0x0000000000BD0000-0x0000000000BE8000-memory.dmp	family_xworm
behavioral2/files/0x000e000000023b56-49.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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2236	powershell.exe
3604	powershell.exe
5060	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	fuckd.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2308	fuckd.exe
3840	fuckd.exe
2036	fuckd.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\fuckd = "C:\\ProgramData\\fuckd.exe"	fuckd.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
13	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
1876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
5060	powershell.exe
5060	powershell.exe
2236	powershell.exe
2236	powershell.exe
3604	powershell.exe
3604	powershell.exe
4424	fuckd.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4424	fuckd.exe
Token: SeDebugPrivilege	5060	powershell.exe
Token: SeDebugPrivilege	2236	powershell.exe
Token: SeDebugPrivilege	3604	powershell.exe
Token: SeDebugPrivilege	4424	fuckd.exe
Token: SeDebugPrivilege	2308	fuckd.exe
Token: SeDebugPrivilege	3840	fuckd.exe
Token: SeDebugPrivilege	2036	fuckd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4424	fuckd.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4424 wrote to memory of 5060	4424	fuckd.exe	88
PID 4424 wrote to memory of 5060	4424	fuckd.exe	88
PID 4424 wrote to memory of 2236	4424	fuckd.exe	91
PID 4424 wrote to memory of 2236	4424	fuckd.exe	91
PID 4424 wrote to memory of 3604	4424	fuckd.exe	97
PID 4424 wrote to memory of 3604	4424	fuckd.exe	97
PID 4424 wrote to memory of 1876	4424	fuckd.exe	100
PID 4424 wrote to memory of 1876	4424	fuckd.exe	100

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\fuckd.exe
"C:\Users\Admin\AppData\Local\Temp\fuckd.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:4424
- 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\fuckd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5060
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'fuckd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2236
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\fuckd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3604
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "fuckd" /tr "C:\ProgramData\fuckd.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1876

C:\ProgramData\fuckd.exe
C:\ProgramData\fuckd.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2308

C:\ProgramData\fuckd.exe
C:\ProgramData\fuckd.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3840

C:\ProgramData\fuckd.exe
C:\ProgramData\fuckd.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2036

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\fuckd.exe

Filesize
67KB

MD5
ad1e05ad9933986e699e2313a067a02d

SHA1
9e4f60f224eb0957124b62f4836a87105cf2449c

SHA256
1a1a2ef3e0060ed1cff4c3af265705e04a0b227321946461778c1e81616e770b

SHA512
c2de8f0d328b730360e816bf06ed71a8cbdc7d1debe6c1148ec2d97c8aac7c12e6fef8270d6139f46b1ad9c604d3660069c61b18d29df90649e2c9c6f9576da0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\fuckd.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
b73de26f36a5519ae34f038408ee42ca

SHA1
a891cfffcf7bd6cab3b7282e7dce36565695dc86

SHA256
99fc07573678f45530fd19c8d6206dd1284dd559d7fd53de60131fddb239bc1a

SHA512
18934fa03d13245959d82595410969aa248a72f3ec6c205cb9f6b71bf0c50d4e32f6ffc48be52feb5da6a16fd700f7b73533e5cca27505d2a837cb8b1ad8ebc2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_srbhgpss.53u.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4424-1-0x0000000000BD0000-0x0000000000BE8000-memory.dmp

Filesize
96KB

Download
memory/4424-2-0x00007FFD6F320000-0x00007FFD6FDE1000-memory.dmp

Filesize
10.8MB

Download
memory/4424-0-0x00007FFD6F323000-0x00007FFD6F325000-memory.dmp

Filesize
8KB

Download
memory/4424-51-0x00007FFD6F320000-0x00007FFD6FDE1000-memory.dmp

Filesize
10.8MB

Download
memory/4424-44-0x00007FFD6F323000-0x00007FFD6F325000-memory.dmp

Filesize
8KB

Download
memory/5060-13-0x00000241D2650000-0x00000241D2672000-memory.dmp

Filesize
136KB

Download
memory/5060-18-0x00007FFD6F320000-0x00007FFD6FDE1000-memory.dmp

Filesize
10.8MB

Download
memory/5060-15-0x00007FFD6F320000-0x00007FFD6FDE1000-memory.dmp

Filesize
10.8MB

Download
memory/5060-14-0x00007FFD6F320000-0x00007FFD6FDE1000-memory.dmp

Filesize
10.8MB

Download
memory/5060-3-0x00007FFD6F320000-0x00007FFD6FDE1000-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