xworm | 405bdae4a67cc4a4e5a9d2f39acd2ea34f5054f4caa8b085f03bb1286dfb5105

General

Target

nerat.exe
Size

61KB
MD5

60797170ebbe376274cf30e64b127706
SHA1

648e9c31b92f4d3fb93e7ca8be73836883c41538
SHA256

405bdae4a67cc4a4e5a9d2f39acd2ea34f5054f4caa8b085f03bb1286dfb5105
SHA512

754d72a6b2a5428e64f0d8d58be0bd89a5f6a7c9ec646d08bccc981adf06567ab5191ba0a7768efe8ee8781bcd216e404a0ebaf55992a151e5536e26f8a93559
SSDEEP

1536:WzPVaddkiWRZrtTAdBxmiABbARE4TKQDmjav6/LnkO8AqYZP:Wz4CLTA9mi+bARsbLnkO8AxZP

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:32901

engineering-thoroughly.gl.at.ply.gg:32901

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3808-0-0x0000000000EF0000-0x0000000000F06000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1984 powershell.exe
1624 powershell.exe
972 powershell.exe
2028 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

Processes:

nerat.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation nerat.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation	nerat.exe

Drops startup file 2 IoCs

Processes:

nerat.exe

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

Processes:

flow ioc

3 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
3	ip-api.com

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	process
1984	powershell.exe
1984	powershell.exe
1624	powershell.exe
1624	powershell.exe
972	powershell.exe
972	powershell.exe
2028	powershell.exe
2028	powershell.exe

Suspicious behavior: LoadsDriver 6 IoCs

Processes:

pid

4
4
4
4
4
664

pid
4
4
4
4
4
664

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

nerat.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	3808	nerat.exe
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	1624	powershell.exe
Token: SeDebugPrivilege	972	powershell.exe
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	3808	nerat.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

nerat.exe

description	pid	process	target process
PID 3808 wrote to memory of 1984	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 1984	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 1624	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 1624	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 972	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 972	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 2028	3808	nerat.exe	powershell.exe
PID 3808 wrote to memory of 2028	3808	nerat.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\nerat.exe
"C:\Users\Admin\AppData\Local\Temp\nerat.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3808
- 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\nerat.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1984
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'nerat.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1624
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2028

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:700

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

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\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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
019956d41846044f7b5bac395399cac1

SHA1
10b945313ee3cdf6ce8928d61e8638c0bc078ea8

SHA256
217378e2836b47aedb81e29063de70c2e1b78476e9f503371ec483d8967d3d27

SHA512
8e4ecffd21d98dc0d0aaebf1fc85eb970719268f25ef43208b581222dd6c7344e46bcfc143eaad604143fcecb45ef5e5bef41269625977aebd7bb155660cbd5c

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

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_am3mjmwi.x4p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1984-9-0x000001537AA70000-0x000001537AA92000-memory.dmp

Filesize
136KB

Download
memory/1984-15-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/1984-18-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/1984-14-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/1984-3-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3808-0-0x0000000000EF0000-0x0000000000F06000-memory.dmp

Filesize
88KB

Download
memory/3808-2-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

Filesize
10.8MB

Download
memory/3808-1-0x00007FFF98773000-0x00007FFF98775000-memory.dmp

Filesize
8KB

Download
memory/3808-57-0x00007FFF98770000-0x00007FFF99231000-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