xworm | c55ffa5c9712ee1a90fe57480b627a384f91a7206af676dfaf6975f2f99aafdb

General

Target

client.exe
Size

77KB
MD5

fb02a2794259bc16503067e6aaaaf99d
SHA1

516b366355bc59e2c8d4a2cf691ada44191d22f0
SHA256

c55ffa5c9712ee1a90fe57480b627a384f91a7206af676dfaf6975f2f99aafdb
SHA512

53ebf87b9cfe62c00110ee1531cda5277542f5ea111d296c289f851160fa7dcc4e87fb2af3f2add87bbfa231638fa64c1ceef89e387d5c0e4f3c0c83a28098c1
SSDEEP

1536:YDGUV3RQZlK4ZQSjXHE7b51wTuy+S68QUP2Oovx0:Yt9tb5SOUeOoJ0

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

exchange-daughters.gl.at.ply.gg:55386

Attributes

Install_directory
%AppData%
install_file
discord.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4472-0-0x0000000000D80000-0x0000000000D9A000-memory.dmp	family_xworm
behavioral2/files/0x000f0000000234d0-60.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1656	powershell.exe
3448	powershell.exe
1752	powershell.exe
2268	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-1-5-21-4204450073-1267028356-951339405-1000\Control Panel\International\Geo\Nation	client.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1696	discord.exe
3120	discord.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-1-5-21-4204450073-1267028356-951339405-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\discord = "C:\\Users\\Admin\\AppData\\Roaming\\discord.exe"	client.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
20	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
3060	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
4472	client.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1656	powershell.exe
1656	powershell.exe
3448	powershell.exe
3448	powershell.exe
1752	powershell.exe
1752	powershell.exe
2268	powershell.exe
2268	powershell.exe
4472	client.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4472	client.exe
Token: SeDebugPrivilege	1656	powershell.exe
Token: SeDebugPrivilege	3448	powershell.exe
Token: SeDebugPrivilege	1752	powershell.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	4472	client.exe
Token: SeDebugPrivilege	1696	discord.exe
Token: SeDebugPrivilege	3120	discord.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4472	client.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4472 wrote to memory of 1656	4472	client.exe	87
PID 4472 wrote to memory of 1656	4472	client.exe	87
PID 4472 wrote to memory of 3448	4472	client.exe	90
PID 4472 wrote to memory of 3448	4472	client.exe	90
PID 4472 wrote to memory of 1752	4472	client.exe	92
PID 4472 wrote to memory of 1752	4472	client.exe	92
PID 4472 wrote to memory of 2268	4472	client.exe	94
PID 4472 wrote to memory of 2268	4472	client.exe	94
PID 4472 wrote to memory of 3060	4472	client.exe	96
PID 4472 wrote to memory of 3060	4472	client.exe	96

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\client.exe
"C:\Users\Admin\AppData\Local\Temp\client.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:4472
- 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\client.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1656
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'client.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3448
- 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\discord.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1752
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'discord.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2268
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "discord" /tr "C:\Users\Admin\AppData\Roaming\discord.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3060

C:\Users\Admin\AppData\Roaming\discord.exe
C:\Users\Admin\AppData\Roaming\discord.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1696

C:\Users\Admin\AppData\Roaming\discord.exe
C:\Users\Admin\AppData\Roaming\discord.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3120

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\discord.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
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

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

Filesize
944B

MD5
b4b6d4cc52b5a3a71149b1f33d94d5de

SHA1
97d3dbdd24919eab70e3b14c68797cefc07e90dd

SHA256
da8c02ce00d5b1e6d4c3667465c7bbc14d7cd5227eb634f3d9690afd488267fe

SHA512
fc894f03709b83df7d2fca2779e1e60549078b67bcdbff0b61c8e5a802982210ae971309c1f92577573299288963ab5c95c6b38cbaedf53dc6062812c57a97af

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nm1jdihr.dw4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
77KB

MD5
fb02a2794259bc16503067e6aaaaf99d

SHA1
516b366355bc59e2c8d4a2cf691ada44191d22f0

SHA256
c55ffa5c9712ee1a90fe57480b627a384f91a7206af676dfaf6975f2f99aafdb

SHA512
53ebf87b9cfe62c00110ee1531cda5277542f5ea111d296c289f851160fa7dcc4e87fb2af3f2add87bbfa231638fa64c1ceef89e387d5c0e4f3c0c83a28098c1

Download Submit
memory/1656-14-0x00007FFAADBB0000-0x00007FFAAE671000-memory.dmp

Filesize
10.8MB

Download
memory/1656-18-0x00007FFAADBB0000-0x00007FFAAE671000-memory.dmp

Filesize
10.8MB

Download
memory/1656-15-0x00007FFAADBB0000-0x00007FFAAE671000-memory.dmp

Filesize
10.8MB

Download
memory/1656-12-0x00000273A3BC0000-0x00000273A3BE2000-memory.dmp

Filesize
136KB

Download
memory/1656-13-0x00007FFAADBB0000-0x00007FFAAE671000-memory.dmp

Filesize
10.8MB

Download
memory/4472-0-0x0000000000D80000-0x0000000000D9A000-memory.dmp

Filesize
104KB

Download
memory/4472-57-0x00007FFAADBB3000-0x00007FFAADBB5000-memory.dmp

Filesize
8KB

Download
memory/4472-58-0x00007FFAADBB0000-0x00007FFAAE671000-memory.dmp

Filesize
10.8MB

Download
memory/4472-2-0x00007FFAADBB0000-0x00007FFAAE671000-memory.dmp

Filesize
10.8MB

Download
memory/4472-1-0x00007FFAADBB3000-0x00007FFAADBB5000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads