xworm | a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462

General

Target

XClient.exe
Size

81KB
MD5

75c36e72847b9bc3cc674eac06c44565
SHA1

a42206858b46997eb8f702539ddfa77c300c82a9
SHA256

a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462
SHA512

5d9ec6a2af00a1e10836e433d85e0b1facef17548f96c2513317a2386a136fd86d2d8e951199ebca9093a1a36c457d2a04435d5ffca9a60c19f06cb241e55ca4
SSDEEP

1536:33/nZzjyT2tJkzLIUnBjUthHE9bAMz/NFbs6WrNykOy5RjsmY:fnMStJk3IMUE9bd7/bSDOyL1Y

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/sZpRUbiu
telegram
https://api.telegram.org/bot7704029346:AAHPre1lXQa0UfPCpOUXJZ9UXA9mFxvH4Gk/sendMessage?chat_id=7590668020

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4816-1-0x0000000000800000-0x000000000081A000-memory.dmp	family_xworm
behavioral2/files/0x000b000000023c9e-60.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
3632	powershell.exe
876	powershell.exe
312	powershell.exe
1396	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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1132	security
2940	security

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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\security = "C:\\Users\\Admin\\AppData\\Roaming\\security"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 46 IoCs

Web Service

T1102

flow	ioc
21	pastebin.com
51	pastebin.com
59	pastebin.com
63	pastebin.com
77	pastebin.com
84	pastebin.com
86	pastebin.com
57	pastebin.com
60	pastebin.com
85	pastebin.com
22	pastebin.com
48	pastebin.com
49	pastebin.com
78	pastebin.com
80	pastebin.com
82	pastebin.com
27	pastebin.com
46	pastebin.com
50	pastebin.com
52	pastebin.com
88	pastebin.com
89	pastebin.com
29	pastebin.com
45	pastebin.com
61	pastebin.com
65	pastebin.com
87	pastebin.com
17	pastebin.com
30	pastebin.com
39	pastebin.com
58	pastebin.com
76	pastebin.com
83	pastebin.com
14	pastebin.com
15	pastebin.com
53	pastebin.com
62	pastebin.com
73	pastebin.com
75	pastebin.com
79	pastebin.com
81	pastebin.com
47	pastebin.com
64	pastebin.com
71	pastebin.com
74	pastebin.com
95	pastebin.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
2720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
3632	powershell.exe
3632	powershell.exe
876	powershell.exe
876	powershell.exe
312	powershell.exe
312	powershell.exe
1396	powershell.exe
1396	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	4816	XClient.exe
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	876	powershell.exe
Token: SeDebugPrivilege	312	powershell.exe
Token: SeDebugPrivilege	1396	powershell.exe
Token: SeDebugPrivilege	1132	security
Token: SeDebugPrivilege	2940	security

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4816 wrote to memory of 3632	4816	XClient.exe	84
PID 4816 wrote to memory of 3632	4816	XClient.exe	84
PID 4816 wrote to memory of 876	4816	XClient.exe	86
PID 4816 wrote to memory of 876	4816	XClient.exe	86
PID 4816 wrote to memory of 312	4816	XClient.exe	88
PID 4816 wrote to memory of 312	4816	XClient.exe	88
PID 4816 wrote to memory of 1396	4816	XClient.exe	90
PID 4816 wrote to memory of 1396	4816	XClient.exe	90
PID 4816 wrote to memory of 2720	4816	XClient.exe	92
PID 4816 wrote to memory of 2720	4816	XClient.exe	92

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4816
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3632
- 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:876
- 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\security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:312
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'security'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1396
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "security" /tr "C:\Users\Admin\AppData\Roaming\security"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2720

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1132

C:\Users\Admin\AppData\Roaming\security
C:\Users\Admin\AppData\Roaming\security
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2940

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\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\security.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
e6d75ea0804f3349c98ab2a3697afbdf

SHA1
af630f0b13094907bed49473af6dedbf4aaf473e

SHA256
38bb07c6d1442786f683bd682224732f13226a1d3d81b37f32c49b1a943ce05b

SHA512
ec7256543d0aeb7f5430bef2352b3873c6c34a6069cb4d349385f14516143db12083b3b7af68c21023635f5a4dc6d5b2689a3c54df9c3cd9dadea47f3ce8f757

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lbkelijn.uya.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\security

Filesize
81KB

MD5
75c36e72847b9bc3cc674eac06c44565

SHA1
a42206858b46997eb8f702539ddfa77c300c82a9

SHA256
a78098fb2b94571b85c7dce87af0cb9d8458b6d4e223ddb7fd633d81cae07462

SHA512
5d9ec6a2af00a1e10836e433d85e0b1facef17548f96c2513317a2386a136fd86d2d8e951199ebca9093a1a36c457d2a04435d5ffca9a60c19f06cb241e55ca4

Download Submit
memory/3632-12-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/3632-17-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/3632-14-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/3632-13-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/3632-11-0x00000296C1460000-0x00000296C1482000-memory.dmp

Filesize
136KB

Download
memory/4816-0-0x00007FFB8A063000-0x00007FFB8A065000-memory.dmp

Filesize
8KB

Download
memory/4816-55-0x00007FFB8A063000-0x00007FFB8A065000-memory.dmp

Filesize
8KB

Download
memory/4816-56-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/4816-57-0x00007FFB8A060000-0x00007FFB8AB21000-memory.dmp

Filesize
10.8MB

Download
memory/4816-1-0x0000000000800000-0x000000000081A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads