xworm | 06ebe0fa2a8df8fe5a51879b6e4a81292bd36668e619666f94db94641666abd9

General

Target

RunTimeBroker.exe
Size

39KB
MD5

0061dd18de7cfdd840fbce10433e8d73
SHA1

9852fe23c191a11a387a7f7a7744c15b1d7d601a
SHA256

06ebe0fa2a8df8fe5a51879b6e4a81292bd36668e619666f94db94641666abd9
SHA512

4687b8357ef603dfbefd0661d103a454d7d1dc3448526d6e9d21823a2d60b485cea307eedf846dd695bc2009534abd1081461d03f39729dc9c642478a6d87411
SSDEEP

768:N2CSKPu9Wkh6A9C96eutXwwTSmvAFU9OLj6SOMhNL575A:EVK6WgMs2moFU9Yj6SOM/pi

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

rTw9cIeh9w3su4g8

Attributes

Install_directory
%AppData%
install_file
Dllhost.exe
pastebin_url
https://pastebin.com/raw/pw1j2xqz

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4816-1-0x0000000000DE0000-0x0000000000DF0000-memory.dmp	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
3788	powershell.exe
3816	powershell.exe
2276	powershell.exe
2828	powershell.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-1-5-21-2394516847-3409208829-2230326962-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dllhost = "C:\\Users\\Admin\\AppData\\Roaming\\Dllhost.exe"	RunTimeBroker.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 5 IoCs

Web Service

T1102

flow	ioc
1	pastebin.com
4	pastebin.com
5	pastebin.com
6	pastebin.com
7	pastebin.com

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
1	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3788	powershell.exe
3788	powershell.exe
3816	powershell.exe
3816	powershell.exe
2276	powershell.exe
2276	powershell.exe
2828	powershell.exe
2828	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	4816	RunTimeBroker.exe
Token: SeDebugPrivilege	3788	powershell.exe
Token: SeDebugPrivilege	3816	powershell.exe
Token: SeDebugPrivilege	2276	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 3788	4816	RunTimeBroker.exe	82
PID 4816 wrote to memory of 3788	4816	RunTimeBroker.exe	82
PID 4816 wrote to memory of 3816	4816	RunTimeBroker.exe	84
PID 4816 wrote to memory of 3816	4816	RunTimeBroker.exe	84
PID 4816 wrote to memory of 2276	4816	RunTimeBroker.exe	86
PID 4816 wrote to memory of 2276	4816	RunTimeBroker.exe	86
PID 4816 wrote to memory of 2828	4816	RunTimeBroker.exe	88
PID 4816 wrote to memory of 2828	4816	RunTimeBroker.exe	88

C:\Users\Admin\AppData\Local\Temp\RunTimeBroker.exe
"C:\Users\Admin\AppData\Local\Temp\RunTimeBroker.exe"
1⤵
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4816
- 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\RunTimeBroker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3788
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RunTimeBroker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3816
- 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\Dllhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Dllhost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2828

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
e3840d9bcedfe7017e49ee5d05bd1c46

SHA1
272620fb2605bd196df471d62db4b2d280a363c6

SHA256
3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

SHA512
76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

Filesize
944B

MD5
f8c40f7624e23fa92ae2f41e34cfca77

SHA1
20e742cfe2759ac2adbc16db736a9e143ca7b677

SHA256
c51a52818a084addbfa913d2bb4bb2b0e60c287a4cf98e679f18b8a521c0aa7b

SHA512
f1da3ec61403d788d417d097a7ed2947203c6bff3cf1d35d697c31edecdf04710b3e44b2aa263b886e297b2ce923fea410ccc673261928f1d0cd81252740dbe7

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

Filesize
944B

MD5
34e3230cb2131270db1af79fb3d57752

SHA1
21434dd7cf3c4624226b89f404fd7982825f8ac6

SHA256
0f162f27548a84db1638bcf46d03661b5bcb3032e765fafdb597cc107639ba39

SHA512
3756cb01e82dbda681b562eae74d0b8ef8b3787b126119a51a92c51a78204a7805b9bdd60c00c50a3be23b843e78bb153b656540767069f739ce421b9bc02335

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fvhbc3dm.g4f.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3788-12-0x00007FFD70AD0000-0x00007FFD71592000-memory.dmp

Filesize
10.8MB

Download
memory/3788-13-0x00007FFD70AD0000-0x00007FFD71592000-memory.dmp

Filesize
10.8MB

Download
memory/3788-16-0x00007FFD70AD0000-0x00007FFD71592000-memory.dmp

Filesize
10.8MB

Download
memory/3788-17-0x00007FFD70AD0000-0x00007FFD71592000-memory.dmp

Filesize
10.8MB

Download
memory/3788-11-0x00007FFD70AD0000-0x00007FFD71592000-memory.dmp

Filesize
10.8MB

Download
memory/3788-2-0x0000021D690D0000-0x0000021D690F2000-memory.dmp

Filesize
136KB

Download
memory/4816-0-0x00007FFD70AD3000-0x00007FFD70AD5000-memory.dmp

Filesize
8KB

Download
memory/4816-1-0x0000000000DE0000-0x0000000000DF0000-memory.dmp

Filesize
64KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads