xworm | 8eaad7c6ce7471c8cba5b274b974e11427dcdb743b64480d9386afbd9aaebc79

General

Target

XClient.exe
Size

210KB
MD5

9bfbec6717ad855d87e16a7a36cf2060
SHA1

ad8feff48191bb239ae893caeab35e539735069c
SHA256

8eaad7c6ce7471c8cba5b274b974e11427dcdb743b64480d9386afbd9aaebc79
SHA512

168befaf6d0586a5173e8bf5f6e9efd6afac1b603b117c93464d49a806943cb6b3ecb8f4c318f1cf94e3b12c9b8e72dd0dd1228ca51d4c8eb290c180b17c780b
SSDEEP

3072:EPczFJ9Z4OClv8SKfbzxcwg7es6/Vsb8VKTup49oJMfF/H9N3Ky9NzLn7:ZRJ9oUhcX7elbKTuq9bfF/H9d9n

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

JdATxGGlLfwymoJ6

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/4YfEusCJ

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1996-1-0x00000000008B0000-0x00000000008EA000-memory.dmp	family_xworm
behavioral2/files/0x000c00000001e104-60.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
3784	powershell.exe
1868	powershell.exe
2356	powershell.exe
5088	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\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
3616	XClient.exe
1532	XClient.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 44 IoCs

Web Service

T1102

flow	ioc
33	pastebin.com
50	pastebin.com
55	pastebin.com
60	pastebin.com
69	pastebin.com
76	pastebin.com
85	pastebin.com
16	pastebin.com
17	pastebin.com
48	pastebin.com
49	pastebin.com
62	pastebin.com
75	pastebin.com
77	pastebin.com
63	pastebin.com
73	pastebin.com
87	pastebin.com
51	pastebin.com
81	pastebin.com
83	pastebin.com
84	pastebin.com
89	pastebin.com
19	pastebin.com
31	pastebin.com
52	pastebin.com
64	pastebin.com
74	pastebin.com
79	pastebin.com
82	pastebin.com
23	pastebin.com
42	pastebin.com
59	pastebin.com
86	pastebin.com
24	pastebin.com
27	pastebin.com
65	pastebin.com
66	pastebin.com
80	pastebin.com
88	pastebin.com
53	pastebin.com
54	pastebin.com
58	pastebin.com
61	pastebin.com
78	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
13	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
3260	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2356	powershell.exe
2356	powershell.exe
5088	powershell.exe
5088	powershell.exe
3784	powershell.exe
3784	powershell.exe
1868	powershell.exe
1868	powershell.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1996	XClient.exe
Token: SeDebugPrivilege	2356	powershell.exe
Token: SeDebugPrivilege	5088	powershell.exe
Token: SeDebugPrivilege	3784	powershell.exe
Token: SeDebugPrivilege	1868	powershell.exe
Token: SeDebugPrivilege	3616	XClient.exe
Token: SeDebugPrivilege	1532	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 2356	1996	XClient.exe	86
PID 1996 wrote to memory of 2356	1996	XClient.exe	86
PID 1996 wrote to memory of 5088	1996	XClient.exe	88
PID 1996 wrote to memory of 5088	1996	XClient.exe	88
PID 1996 wrote to memory of 3784	1996	XClient.exe	90
PID 1996 wrote to memory of 3784	1996	XClient.exe	90
PID 1996 wrote to memory of 1868	1996	XClient.exe	92
PID 1996 wrote to memory of 1868	1996	XClient.exe	92
PID 1996 wrote to memory of 3260	1996	XClient.exe	94
PID 1996 wrote to memory of 3260	1996	XClient.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\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:1996
- 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:2356
- 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:5088
- 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:3784
- 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:1868
- 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:3260

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3616

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1532

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\XClient.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
f5ea6e485a296269f874f3d12709ce50

SHA1
c73e5adec8ceef00e49e0f51d382b990fc5b4d4c

SHA256
980d5cc1b33f9995ce40b593bac646373b613070e5ca6da2c297c5fb8c1f28c3

SHA512
09e3083c712ae875d1dae3d4c903e96e6f5e97f5a15d4301319d3f6f63b2e704ce1b728704fd4ada7f0c26b782b05b551f961db8775f7527b1b1b224e7478659

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

Filesize
944B

MD5
3b444d3f0ddea49d84cc7b3972abe0e6

SHA1
0a896b3808e68d5d72c2655621f43b0b2c65ae02

SHA256
ab075b491d20c6f66c7bd40b57538c1cfdaab5aac4715bfe3bbc7f4745860a74

SHA512
eb0ab5d68472ec42de4c9b6d84306d7bca3874be1d0ac572030a070f21a698432418068e1a6006ff88480be8c8f54c769dee74b2def403f734109dba7261f36b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oeozmobm.42p.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
210KB

MD5
9bfbec6717ad855d87e16a7a36cf2060

SHA1
ad8feff48191bb239ae893caeab35e539735069c

SHA256
8eaad7c6ce7471c8cba5b274b974e11427dcdb743b64480d9386afbd9aaebc79

SHA512
168befaf6d0586a5173e8bf5f6e9efd6afac1b603b117c93464d49a806943cb6b3ecb8f4c318f1cf94e3b12c9b8e72dd0dd1228ca51d4c8eb290c180b17c780b

Download Submit
memory/1996-41-0x00007FFF75D53000-0x00007FFF75D55000-memory.dmp

Filesize
8KB

Download
memory/1996-0-0x00007FFF75D53000-0x00007FFF75D55000-memory.dmp

Filesize
8KB

Download
memory/1996-58-0x00007FFF75D50000-0x00007FFF76811000-memory.dmp

Filesize
10.8MB

Download
memory/1996-2-0x00007FFF75D50000-0x00007FFF76811000-memory.dmp

Filesize
10.8MB

Download
memory/1996-1-0x00000000008B0000-0x00000000008EA000-memory.dmp

Filesize
232KB

Download
memory/2356-18-0x00007FFF75D50000-0x00007FFF76811000-memory.dmp

Filesize
10.8MB

Download
memory/2356-15-0x00007FFF75D50000-0x00007FFF76811000-memory.dmp

Filesize
10.8MB

Download
memory/2356-14-0x00007FFF75D50000-0x00007FFF76811000-memory.dmp

Filesize
10.8MB

Download
memory/2356-3-0x00007FFF75D50000-0x00007FFF76811000-memory.dmp

Filesize
10.8MB

Download
memory/2356-9-0x00000147A2940000-0x00000147A2962000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads