xworm | 0cc35e594ffd17ad9d51f824445dc7e391a74535e575c9d638b0402cf49e612c

General

Target

Winrar Code Craker.exe
Size

4.0MB
MD5

0f34e7a485d0884daae6dec91541b742
SHA1

e366c430f4cf375dd96ca92edfe06ff165869e46
SHA256

0cc35e594ffd17ad9d51f824445dc7e391a74535e575c9d638b0402cf49e612c
SHA512

8e966e4a13beb16713a22bfd467f3fc18a81d47cbdf421ba113c5ec5b86a12011a50a82adf6b4e9bc6e37f6e8ca468420eaf30d62cab749a221e1f0b9a4018ec
SSDEEP

98304:YkhH66TO4Za+CtcszUqoLmO/AWyeT7DJgBSEpxEydq2EdtIONLG:c6QcBdCRWyen1zE7Ey8JdyONG

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

jynx.uncofig.com:1111

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000d000000012263-5.dat	family_xworm
behavioral1/memory/2804-7-0x0000000000300000-0x000000000031A000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1404	powershell.exe
2656	powershell.exe
1884	powershell.exe
2972	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2804	helper.exe
2920	winrar-x64-701fr.exe
1180	Process not Found

Loads dropped DLL 1 IoCs

pid	Process
2904	Winrar Code Craker.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	helper.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
4	ip-api.com

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 1 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Internet Explorer\Main	winrar-x64-701fr.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2804	helper.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2656	powershell.exe
1884	powershell.exe
2972	powershell.exe
1404	powershell.exe
2804	helper.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2804	helper.exe
Token: SeDebugPrivilege	2656	powershell.exe
Token: SeDebugPrivilege	1884	powershell.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	1404	powershell.exe
Token: SeDebugPrivilege	2804	helper.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2920	winrar-x64-701fr.exe
2920	winrar-x64-701fr.exe
2804	helper.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2904 wrote to memory of 2804	2904	Winrar Code Craker.exe	30
PID 2904 wrote to memory of 2804	2904	Winrar Code Craker.exe	30
PID 2904 wrote to memory of 2804	2904	Winrar Code Craker.exe	30
PID 2904 wrote to memory of 2920	2904	Winrar Code Craker.exe	31
PID 2904 wrote to memory of 2920	2904	Winrar Code Craker.exe	31
PID 2904 wrote to memory of 2920	2904	Winrar Code Craker.exe	31
PID 2804 wrote to memory of 2656	2804	helper.exe	33
PID 2804 wrote to memory of 2656	2804	helper.exe	33
PID 2804 wrote to memory of 2656	2804	helper.exe	33
PID 2804 wrote to memory of 1884	2804	helper.exe	35
PID 2804 wrote to memory of 1884	2804	helper.exe	35
PID 2804 wrote to memory of 1884	2804	helper.exe	35
PID 2804 wrote to memory of 2972	2804	helper.exe	37
PID 2804 wrote to memory of 2972	2804	helper.exe	37
PID 2804 wrote to memory of 2972	2804	helper.exe	37
PID 2804 wrote to memory of 1404	2804	helper.exe	39
PID 2804 wrote to memory of 1404	2804	helper.exe	39
PID 2804 wrote to memory of 1404	2804	helper.exe	39

C:\Users\Admin\AppData\Local\Temp\Winrar Code Craker.exe
"C:\Users\Admin\AppData\Local\Temp\Winrar Code Craker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2904
- C:\Users\Admin\AppData\Roaming\helper.exe
  "C:\Users\Admin\AppData\Roaming\helper.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - 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:2804
- - 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\helper.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2656
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'helper.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1884
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2972
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1404
- C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe
  "C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe"
  2⤵
  - Executes dropped EXE
  - Modifies Internet Explorer settings
  - Suspicious use of SetWindowsHookEx
  PID:2920

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2500

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

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
b0dd6fe5edfbafe1f60374af486d8b45

SHA1
9e7e26192600f2f752b73b38c7f9846d00e1edef

SHA256
0e0d61398bba2a36fc15cd0c146a207e1f308a126401ef4bfeb962a903cc711c

SHA512
c88f1ea4d543ffbc3dd06839f48319e33c66f6c1787f3626510cc0ccef4d88e213220549694ddff8200892f0754fa134d18b48314cf207cf4ae02092e7b28fa2

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

Filesize
81KB

MD5
bac22f7b34e1324af3401020d4831867

SHA1
6240c0d1ab52a65738a958ca3c5e360f7f0a2b6f

SHA256
9541d84a204d6271f0ba7bdfa7513d7f555e7f73fbf0142acdb347b61a9f821d

SHA512
2f8d100c90b8a816504f64b594f1a6f7e300bd4f080d4926581f279dca594b7c8342ec941f175782b599cfdb823b60582097d045ba8b57a1826521dd1d283ab5

Download Submit
\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe

Filesize
3.9MB

MD5
d512d8b27ad9910d66f8ce62086b413b

SHA1
4873eabfbb4280a0042a6b0bb65ca0eea0b72832

SHA256
1b8f832471a20e82b4252b81c63bb2cf6e3da335d889d877d5bacc4ae28f99a2

SHA512
4b69ee83456dfced538685984f381835bdc84fa9e4b297d1c213fda4e3dd166ce70a1639eb4ab8abbe59b64b7a9f87a7dbfefcbe45ee74d42d362138134f8ae4

Download Submit
memory/1884-39-0x0000000002010000-0x0000000002018000-memory.dmp

Filesize
32KB

Download
memory/1884-38-0x000000001B230000-0x000000001B512000-memory.dmp

Filesize
2.9MB

Download
memory/2656-30-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download
memory/2656-29-0x000000001B270000-0x000000001B552000-memory.dmp

Filesize
2.9MB

Download
memory/2804-24-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-31-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-13-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/2804-7-0x0000000000300000-0x000000000031A000-memory.dmp

Filesize
104KB

Download
memory/2804-50-0x000007FEF6BB0000-0x000007FEF759C000-memory.dmp

Filesize
9.9MB

Download
memory/2904-0-0x000007FEF6BB3000-0x000007FEF6BB4000-memory.dmp

Filesize
4KB

Download
memory/2904-1-0x0000000000E00000-0x0000000001200000-memory.dmp

Filesize
4.0MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads