xworm | 7aac36efe6e64d6c74640a62ab6288e132c76c00f808626ced013815d620d916

General

Target

X5261Client.exe
Size

78KB
MD5

845ebde31aad126f79758ca6c50cce93
SHA1

8c9d1f12dd5725d53bacc17318015df2907b674b
SHA256

7aac36efe6e64d6c74640a62ab6288e132c76c00f808626ced013815d620d916
SHA512

fc8f885e3506c58f60c26564c47a6653c9f6ffceee5855fb831df7e8bdceeb91692aa5504aceb892c60705527f6ca2c6997e8a8ab12e46c70391e9bede350baa
SSDEEP

1536:0GKVYtOBZUV9XHbH9cRXoi+suCQb4bQ3VbVXTB3G6rmHjORTSshpPweDz:0w5jqBmsQ8bQ3VpXTxjmHjORT1pPlDz

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
System.exe
pastebin_url
https://pastebin.com/raw/erNS5DCf
telegram
https://api.telegram.org/bot6322711372:AAGbIfXFhlNS1SFeiUdz8wnaxv2bCiayqnI/sendMessage?chat_id=1098594855

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4692-1-0x0000000000E30000-0x0000000000E4A000-memory.dmp	family_xworm
behavioral1/files/0x000b000000023bae-59.dat	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
1308	powershell.exe
3996	powershell.exe
3004	powershell.exe
4136	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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	X5261Client.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.lnk	X5261Client.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\System.lnk	X5261Client.exe

Executes dropped EXE 3 IoCs

pid	Process
1612	System.exe
4436	System.exe
2832	System.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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\System = "C:\\Users\\Admin\\AppData\\Roaming\\System.exe"	X5261Client.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 47 IoCs

Web Service

T1102

flow	ioc
35	pastebin.com
67	pastebin.com
72	pastebin.com
73	pastebin.com
81	pastebin.com
94	pastebin.com
59	pastebin.com
84	pastebin.com
86	pastebin.com
21	pastebin.com
57	pastebin.com
66	pastebin.com
75	pastebin.com
76	pastebin.com
79	pastebin.com
90	pastebin.com
92	pastebin.com
28	pastebin.com
53	pastebin.com
54	pastebin.com
60	pastebin.com
69	pastebin.com
34	pastebin.com
37	pastebin.com
56	pastebin.com
71	pastebin.com
91	pastebin.com
96	pastebin.com
87	pastebin.com
88	pastebin.com
55	pastebin.com
58	pastebin.com
64	pastebin.com
70	pastebin.com
80	pastebin.com
85	pastebin.com
20	pastebin.com
27	pastebin.com
74	pastebin.com
89	pastebin.com
93	pastebin.com
36	pastebin.com
40	pastebin.com
51	pastebin.com
82	pastebin.com
83	pastebin.com
95	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
15	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
2052	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1308	powershell.exe
1308	powershell.exe
3996	powershell.exe
3996	powershell.exe
3004	powershell.exe
3004	powershell.exe
4136	powershell.exe
4136	powershell.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4692	X5261Client.exe
Token: SeDebugPrivilege	1308	powershell.exe
Token: SeDebugPrivilege	3996	powershell.exe
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeDebugPrivilege	4136	powershell.exe
Token: SeDebugPrivilege	1612	System.exe
Token: SeDebugPrivilege	4436	System.exe
Token: SeDebugPrivilege	2832	System.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4692 wrote to memory of 1308	4692	X5261Client.exe	87
PID 4692 wrote to memory of 1308	4692	X5261Client.exe	87
PID 4692 wrote to memory of 3996	4692	X5261Client.exe	89
PID 4692 wrote to memory of 3996	4692	X5261Client.exe	89
PID 4692 wrote to memory of 3004	4692	X5261Client.exe	91
PID 4692 wrote to memory of 3004	4692	X5261Client.exe	91
PID 4692 wrote to memory of 4136	4692	X5261Client.exe	93
PID 4692 wrote to memory of 4136	4692	X5261Client.exe	93
PID 4692 wrote to memory of 2052	4692	X5261Client.exe	97
PID 4692 wrote to memory of 2052	4692	X5261Client.exe	97

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\X5261Client.exe
"C:\Users\Admin\AppData\Local\Temp\X5261Client.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4692
- 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\X5261Client.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1308
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'X5261Client.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3996
- 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\System.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'System.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4136
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "System" /tr "C:\Users\Admin\AppData\Roaming\System.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2052

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1612

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4436

C:\Users\Admin\AppData\Roaming\System.exe
C:\Users\Admin\AppData\Roaming\System.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2832

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\System.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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
fd98baf5a9c30d41317663898985593b

SHA1
ea300b99f723d2429d75a6c40e0838bf60f17aad

SHA256
9d97a5bbc88fdcceac25f293383f7e5ce242675460ffbfb2ee9090870c034e96

SHA512
bf4dbbd671b5d7afb326622a7c781f150860294d3dba7160330046c258c84a15981c70e50d84dc7faaa7cc8b8c90bf8df818b3f2d3806a8a3671dfe5e38fe7b0

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

Filesize
944B

MD5
b3c3db201c6e1fc54f0e17762fe03246

SHA1
249bfcef33cdd2d6c13a7cc7c9c1d73905fb51d6

SHA256
6771a83a83da5d6ce23e9cfa5567eb70084dffd51a7c07130ba3379cff78a59f

SHA512
2945c6f4e05b86e161b9753fca74cc9daf76e8ef535cdff0e9d83cca706eabd6e1ca3aba55005b2d16c2023f6604ee6886837336a63f421fa25f73120cfc00a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kqspsavw.ezq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
78KB

MD5
845ebde31aad126f79758ca6c50cce93

SHA1
8c9d1f12dd5725d53bacc17318015df2907b674b

SHA256
7aac36efe6e64d6c74640a62ab6288e132c76c00f808626ced013815d620d916

SHA512
fc8f885e3506c58f60c26564c47a6653c9f6ffceee5855fb831df7e8bdceeb91692aa5504aceb892c60705527f6ca2c6997e8a8ab12e46c70391e9bede350baa

Download Submit
memory/1308-4-0x00007FF8978D0000-0x00007FF898391000-memory.dmp

Filesize
10.8MB

Download
memory/1308-18-0x00007FF8978D0000-0x00007FF898391000-memory.dmp

Filesize
10.8MB

Download
memory/1308-15-0x00007FF8978D0000-0x00007FF898391000-memory.dmp

Filesize
10.8MB

Download
memory/1308-14-0x000001C544C10000-0x000001C544C32000-memory.dmp

Filesize
136KB

Download
memory/1308-3-0x00007FF8978D0000-0x00007FF898391000-memory.dmp

Filesize
10.8MB

Download
memory/4692-0-0x00007FF8978D3000-0x00007FF8978D5000-memory.dmp

Filesize
8KB

Download
memory/4692-53-0x00007FF8978D3000-0x00007FF8978D5000-memory.dmp

Filesize
8KB

Download
memory/4692-58-0x00007FF8978D0000-0x00007FF898391000-memory.dmp

Filesize
10.8MB

Download
memory/4692-2-0x00007FF8978D0000-0x00007FF898391000-memory.dmp

Filesize
10.8MB

Download
memory/4692-1-0x0000000000E30000-0x0000000000E4A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads