xworm | 6e552c8d82a2553ec83fea57d340561834aeac22ae30d6a81692f2eee6651e14

General

Target

loader.exe
Size

61KB
MD5

427cae9ddc40f9a7ea51459fc265d9be
SHA1

8c68b6be3529637908878e64a020dd99c3bf98ad
SHA256

4a1a9976a6fc9351ce34db0c601952328f52b526894cea614b51879c065e89a4
SHA512

da5d985814986580a53712df240dad2dd876a16aeebab7e89ddc9968a8d2305dbf1cb695e1fa812ac534f27f1dfabf1be8aedac1f07d1b311163843f905a47a1
SSDEEP

1536:SAXBcwCcPCxLgk2BeVbcqbhc48Ulk36nJNOOKLj:SAyvcPCaJe9Pbhc0hcOKLj

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

submit-processing.gl.at.ply.gg:54034

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/4924-0-0x00000000006D0000-0x00000000006E6000-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
632	powershell.exe
2848	powershell.exe
3836	powershell.exe
2232	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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	loader.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	loader.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	loader.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-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	loader.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
14	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
5108	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2848	powershell.exe
2848	powershell.exe
3836	powershell.exe
3836	powershell.exe
2232	powershell.exe
2232	powershell.exe
632	powershell.exe
632	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4924	loader.exe
Token: SeDebugPrivilege	2848	powershell.exe
Token: SeDebugPrivilege	3836	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	632	powershell.exe
Token: SeDebugPrivilege	4924	loader.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4924 wrote to memory of 2848	4924	loader.exe	85
PID 4924 wrote to memory of 2848	4924	loader.exe	85
PID 4924 wrote to memory of 3836	4924	loader.exe	87
PID 4924 wrote to memory of 3836	4924	loader.exe	87
PID 4924 wrote to memory of 2232	4924	loader.exe	89
PID 4924 wrote to memory of 2232	4924	loader.exe	89
PID 4924 wrote to memory of 632	4924	loader.exe	91
PID 4924 wrote to memory of 632	4924	loader.exe	91
PID 4924 wrote to memory of 5108	4924	loader.exe	94
PID 4924 wrote to memory of 5108	4924	loader.exe	94

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\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4924
- 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\loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2848
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3836
- 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:2232
- 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:632
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5108

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\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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
4f473e15a0686d0c819ad40b5f232368

SHA1
a769892ae2e8203e7d4a992a317189b56723da33

SHA256
53d6c0d9a801d45fefdcec9b3ecf217fef683efc4e40ba9c72f0116ee4d20237

SHA512
d9b43132432078d5496688717253e58e7caab0dcbd20fc41fa8a718d11d699e93ee198f18be4243ed34bcf8912e1377888fe72ae5b26d920e765ab523f0bdf55

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

Filesize
944B

MD5
2bb005f08e40b9d8c31f1c09da44565d

SHA1
8a7097ecaeca704b6d653bfedea449cfbe79072f

SHA256
d7c96f73a5074bd88297839f5e749996eb91510490acd18d16edd5751f087943

SHA512
3da328cd8050288fcd5e9545812f5b0767aa9c19674d6f6f5dc35e92d436b2690056018910ff5a90f33c1f6d9602c70a256637d52498f1794efc8617fea6cbe3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cz0qrhq4.zlx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2848-3-0x00007FFB1AA50000-0x00007FFB1B511000-memory.dmp

Filesize
10.8MB

Download
memory/2848-10-0x000001A7FBEF0000-0x000001A7FBF12000-memory.dmp

Filesize
136KB

Download
memory/2848-15-0x00007FFB1AA50000-0x00007FFB1B511000-memory.dmp

Filesize
10.8MB

Download
memory/2848-18-0x00007FFB1AA50000-0x00007FFB1B511000-memory.dmp

Filesize
10.8MB

Download
memory/2848-4-0x00007FFB1AA50000-0x00007FFB1B511000-memory.dmp

Filesize
10.8MB

Download
memory/4924-1-0x00007FFB1AA53000-0x00007FFB1AA55000-memory.dmp

Filesize
8KB

Download
memory/4924-2-0x00007FFB1AA50000-0x00007FFB1B511000-memory.dmp

Filesize
10.8MB

Download
memory/4924-0-0x00000000006D0000-0x00000000006E6000-memory.dmp

Filesize
88KB

Download
memory/4924-57-0x00007FFB1AA53000-0x00007FFB1AA55000-memory.dmp

Filesize
8KB

Download
memory/4924-58-0x00007FFB1AA50000-0x00007FFB1B511000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads