xworm | b6a0c0000264b84cffcf9fd20e7a6321a6ca97be8babf2092805fbb5ae577809

General

Target

injector.exe
Size

49KB
MD5

37fbd83271e9f0a2dbe4372ec015c23f
SHA1

7deaca82f648bc67b5cc86e20696fff3a6a957a9
SHA256

b6a0c0000264b84cffcf9fd20e7a6321a6ca97be8babf2092805fbb5ae577809
SHA512

a3eff87bf8f4d8265706aa366060b661628a8621441762078356e029ea23f6369bf3d807e33b4ca8ff0adb84f8ab17cd46fd7a5387237c2be81ba57d83c7d300
SSDEEP

768:ZWO7VMyjFxpyKlSFyx9DKx6YOjhNOKEkzbwonH8wSpO1bNX:ggVMy/sBFU9DU6YOjq1EwoH865F

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

https://pastebin.com/raw/r8P3Ngmc:324

Mutex

LrtSM6IVyhGy1fuw

Attributes

Install_directory
%AppData%
install_file
injector.exe
pastebin_url
https://pastebin.com/raw/r8P3Ngmc

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/1968-1-0x00000000003B0000-0x00000000003C2000-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
1548	powershell.exe
2528	powershell.exe
3784	powershell.exe
3596	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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	injector.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\injector.lnk	injector.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\injector.lnk	injector.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-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\injector = "C:\\Users\\Admin\\AppData\\Roaming\\injector.exe"	injector.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 9 IoCs

Web Service

T1102

flow	ioc
18	pastebin.com
20	pastebin.com
8	pastebin.com
16	pastebin.com
17	pastebin.com
19	pastebin.com
3	pastebin.com
9	pastebin.com
15	pastebin.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
1548	powershell.exe
1548	powershell.exe
2528	powershell.exe
2528	powershell.exe
3784	powershell.exe
3784	powershell.exe
3596	powershell.exe
3596	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1968	injector.exe
Token: SeDebugPrivilege	1548	powershell.exe
Token: SeDebugPrivilege	2528	powershell.exe
Token: SeDebugPrivilege	3784	powershell.exe
Token: SeDebugPrivilege	3596	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1968 wrote to memory of 1548	1968	injector.exe	81
PID 1968 wrote to memory of 1548	1968	injector.exe	81
PID 1968 wrote to memory of 2528	1968	injector.exe	83
PID 1968 wrote to memory of 2528	1968	injector.exe	83
PID 1968 wrote to memory of 3784	1968	injector.exe	85
PID 1968 wrote to memory of 3784	1968	injector.exe	85
PID 1968 wrote to memory of 3596	1968	injector.exe	87
PID 1968 wrote to memory of 3596	1968	injector.exe	87

C:\Users\Admin\AppData\Local\Temp\injector.exe
"C:\Users\Admin\AppData\Local\Temp\injector.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1968
- 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\injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1548
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2528
- 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\injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3784
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'injector.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3596

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

Query Registry

1

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\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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
cc19bcff372d20459d3651ba8aef50e7

SHA1
3c6f1d4cdd647864fb97a16b1aefba67fcee11f7

SHA256
366473e774d8976c7fd4dc582220666fb61a4feb3f7c95e69b2a68ad9e446ec9

SHA512
a0e360ca4b6e874fd44612bf4b17f3722c0619da4f6bade12a62efadae88c2d33460114eaafa2bc3fb1cef5bea07e745b8bee24f15d0cacaff5f4a521b225080

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

Filesize
944B

MD5
391457bd193ed85e4893990969840a5c

SHA1
1b36951e249e5d42c0206d840e659cde45825e29

SHA256
3d746e5e7820005c219d4dab7a47086f732214f7542b35194cb8ac1c3948404f

SHA512
e10f1b0991beb3d575c961885a5f056af46d2934fb29a79a440c40cf25d35aec0ee9075674c1260fa76020c4d9fac2098cd5b1d63989fb859166bcf1be9eb631

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mtmfb00v.bm4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1548-13-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/1548-16-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/1548-12-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/1548-2-0x000001D56FB50000-0x000001D56FB72000-memory.dmp

Filesize
136KB

Download
memory/1968-0-0x00007FFB795C3000-0x00007FFB795C5000-memory.dmp

Filesize
8KB

Download
memory/1968-1-0x00000000003B0000-0x00000000003C2000-memory.dmp

Filesize
72KB

Download
memory/1968-55-0x00007FFB795C0000-0x00007FFB7A081000-memory.dmp

Filesize
10.8MB

Download
memory/1968-56-0x00007FFB795C3000-0x00007FFB795C5000-memory.dmp

Filesize
8KB

Download
memory/1968-57-0x00007FFB795C0000-0x00007FFB7A081000-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