xworm | 5671047446840afc32551f04b3fc8ddcc59d7440d23ffa9cd84f88a178f29e22

General

Target

skibidirat.exe
Size

41KB
MD5

f2e5db54a0c2fcea960e780a0f2f9084
SHA1

ea761e056da05eedcd002595b3f2e9dae8c4d475
SHA256

5671047446840afc32551f04b3fc8ddcc59d7440d23ffa9cd84f88a178f29e22
SHA512

8fddd587e7c5379d83857c1b6e2f0a9b987212a8c62bd5d9214870d1157ca35407d889bcb924904be40d4d87d61df117a0bc8ded7bf43c44dc0705d5f56036f8
SSDEEP

768:I3MEkvhOq0S5us9VYCfRaYVO8MoJpJIF5PG9neb6vOwhZ35iI:6MEk5T0EDfz0Hfo3aFI9eb6vOwT8I

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

mKfmwhMRsVlgqzJg

Attributes

Install_directory
%AppData%
install_file
Windows host process.exe
pastebin_url
https://pastebin.com/raw/BZjSD36y

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/2372-1-0x00000000004F0000-0x0000000000500000-memory.dmp	family_xworm
behavioral2/files/0x001100000001da30-59.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
208	powershell.exe
440	powershell.exe
1340	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-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	skibidirat.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
400	Windows host process.exe
532	Windows host process.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-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows host process = "C:\\Users\\Admin\\AppData\\Roaming\\Windows host process.exe"	skibidirat.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
20	pastebin.com
21	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
17	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
4288	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
208	powershell.exe
208	powershell.exe
440	powershell.exe
440	powershell.exe
1340	powershell.exe
1340	powershell.exe
2232	powershell.exe
2232	powershell.exe
2372	skibidirat.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	skibidirat.exe
Token: SeDebugPrivilege	208	powershell.exe
Token: SeDebugPrivilege	440	powershell.exe
Token: SeDebugPrivilege	1340	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	2372	skibidirat.exe
Token: SeDebugPrivilege	400	Windows host process.exe
Token: SeDebugPrivilege	532	Windows host process.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2372	skibidirat.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 208	2372	skibidirat.exe	87
PID 2372 wrote to memory of 208	2372	skibidirat.exe	87
PID 2372 wrote to memory of 440	2372	skibidirat.exe	89
PID 2372 wrote to memory of 440	2372	skibidirat.exe	89
PID 2372 wrote to memory of 1340	2372	skibidirat.exe	91
PID 2372 wrote to memory of 1340	2372	skibidirat.exe	91
PID 2372 wrote to memory of 2232	2372	skibidirat.exe	93
PID 2372 wrote to memory of 2232	2372	skibidirat.exe	93
PID 2372 wrote to memory of 4288	2372	skibidirat.exe	95
PID 2372 wrote to memory of 4288	2372	skibidirat.exe	95

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\skibidirat.exe
"C:\Users\Admin\AppData\Local\Temp\skibidirat.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2372
- 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\skibidirat.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'skibidirat.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:440
- 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\Windows host process.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1340
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows host process.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2232
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows host process" /tr "C:\Users\Admin\AppData\Roaming\Windows host process.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4288

C:\Users\Admin\AppData\Roaming\Windows host process.exe
"C:\Users\Admin\AppData\Roaming\Windows host process.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:400

C:\Users\Admin\AppData\Roaming\Windows host process.exe
"C:\Users\Admin\AppData\Roaming\Windows host process.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:532

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Windows host process.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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
944B

MD5
04114c0529b116bf66d764ff6a5a8fe3

SHA1
0caeff17d1b2190f76c9bf539105f6c40c92bd14

SHA256
fd7092b4e273314186bad6ce71aa4cd69450736b6ec6cc746868997ff82a7532

SHA512
6a718c330824346606ef24f71cca6be0bfafc626b1d2b060b36e919ab07f3d6a345f56cace8a5a84ffbe2183976eb197842c9fd2f3e3b8c8dd307057d59d6f26

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sjc50rue.b3g.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Windows host process.exe

Filesize
41KB

MD5
f2e5db54a0c2fcea960e780a0f2f9084

SHA1
ea761e056da05eedcd002595b3f2e9dae8c4d475

SHA256
5671047446840afc32551f04b3fc8ddcc59d7440d23ffa9cd84f88a178f29e22

SHA512
8fddd587e7c5379d83857c1b6e2f0a9b987212a8c62bd5d9214870d1157ca35407d889bcb924904be40d4d87d61df117a0bc8ded7bf43c44dc0705d5f56036f8

Download Submit
memory/208-14-0x00007FFAAD1A0000-0x00007FFAADC61000-memory.dmp

Filesize
10.8MB

Download
memory/208-15-0x00007FFAAD1A0000-0x00007FFAADC61000-memory.dmp

Filesize
10.8MB

Download
memory/208-18-0x00007FFAAD1A0000-0x00007FFAADC61000-memory.dmp

Filesize
10.8MB

Download
memory/208-13-0x00007FFAAD1A0000-0x00007FFAADC61000-memory.dmp

Filesize
10.8MB

Download
memory/208-8-0x0000024A9CDC0000-0x0000024A9CDE2000-memory.dmp

Filesize
136KB

Download
memory/2372-0-0x00007FFAAD1A3000-0x00007FFAAD1A5000-memory.dmp

Filesize
8KB

Download
memory/2372-2-0x00007FFAAD1A0000-0x00007FFAADC61000-memory.dmp

Filesize
10.8MB

Download
memory/2372-57-0x00007FFAAD1A3000-0x00007FFAAD1A5000-memory.dmp

Filesize
8KB

Download
memory/2372-58-0x00007FFAAD1A0000-0x00007FFAADC61000-memory.dmp

Filesize
10.8MB

Download
memory/2372-1-0x00000000004F0000-0x0000000000500000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads