xworm | 5e0fbebfe54253ec36ca1b69bb380e2568de6fb650185438068b77212ad6d23e

General

Target

XClient.exe
Size

71KB
MD5

4eee730e3f4cd1e6b1f2455dbf51f5b7
SHA1

c95911de37debd2e3df1c630ddeeac4968413296
SHA256

5e0fbebfe54253ec36ca1b69bb380e2568de6fb650185438068b77212ad6d23e
SHA512

7caf0d07acc752c16c29d77c4ae0c67163367435ec7fe6109ed1561f4c2320c9a54449e911d48d627606c822108fbe48b4193201adee5137015837359e1768f4
SSDEEP

1536:eV/fyQp7uAxurpTNgbRaKgjtqK6B64iS5O2x571t:eV/d7hot2bYDDlS5O2x3t

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

147.185.221.23:38042

Attributes

Install_directory
%AppData%
install_file
SystemUser32.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/900-1-0x00000000005D0000-0x00000000005E8000-memory.dmp	family_xworm
behavioral1/files/0x002000000002abe8-58.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
2480	powershell.exe
336	powershell.exe
4352	powershell.exe
1988	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUser32.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemUser32.lnk	XClient.exe

Executes dropped EXE 10 IoCs

pid	Process
2340	SystemUser32.exe
2880	SystemUser32.exe
3884	SystemUser32.exe
2648	SystemUser32.exe
3768	SystemUser32.exe
3744	SystemUser32.exe
3132	SystemUser32.exe
4108	SystemUser32.exe
1640	SystemUser32.exe
4488	SystemUser32.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-1-5-21-1537126222-899333903-2037027349-1000\Software\Microsoft\Windows\CurrentVersion\Run\SystemUser32 = "C:\\Users\\Admin\\AppData\\Roaming\\SystemUser32.exe"	XClient.exe

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
1	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
4124	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2480	powershell.exe
2480	powershell.exe
336	powershell.exe
336	powershell.exe
4352	powershell.exe
4352	powershell.exe
1988	powershell.exe
1988	powershell.exe
900	XClient.exe

Suspicious use of AdjustPrivilegeToken 16 IoCs

description	pid	Process
Token: SeDebugPrivilege	900	XClient.exe
Token: SeDebugPrivilege	2480	powershell.exe
Token: SeDebugPrivilege	336	powershell.exe
Token: SeDebugPrivilege	4352	powershell.exe
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeDebugPrivilege	900	XClient.exe
Token: SeDebugPrivilege	2340	SystemUser32.exe
Token: SeDebugPrivilege	2880	SystemUser32.exe
Token: SeDebugPrivilege	3884	SystemUser32.exe
Token: SeDebugPrivilege	2648	SystemUser32.exe
Token: SeDebugPrivilege	3768	SystemUser32.exe
Token: SeDebugPrivilege	3744	SystemUser32.exe
Token: SeDebugPrivilege	3132	SystemUser32.exe
Token: SeDebugPrivilege	4108	SystemUser32.exe
Token: SeDebugPrivilege	1640	SystemUser32.exe
Token: SeDebugPrivilege	4488	SystemUser32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
900	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 900 wrote to memory of 2480	900	XClient.exe	81
PID 900 wrote to memory of 2480	900	XClient.exe	81
PID 900 wrote to memory of 336	900	XClient.exe	83
PID 900 wrote to memory of 336	900	XClient.exe	83
PID 900 wrote to memory of 4352	900	XClient.exe	85
PID 900 wrote to memory of 4352	900	XClient.exe	85
PID 900 wrote to memory of 1988	900	XClient.exe	87
PID 900 wrote to memory of 1988	900	XClient.exe	87
PID 900 wrote to memory of 4124	900	XClient.exe	89
PID 900 wrote to memory of 4124	900	XClient.exe	89

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⤵
- 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:900
- 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:2480
- 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:336
- 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\SystemUser32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4352
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SystemUser32.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1988
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SystemUser32" /tr "C:\Users\Admin\AppData\Roaming\SystemUser32.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4124

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2340

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2880

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3884

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2648

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3768

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3744

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3132

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4108

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1640

C:\Users\Admin\AppData\Roaming\SystemUser32.exe
C:\Users\Admin\AppData\Roaming\SystemUser32.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4488

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\SystemUser32.exe.log

Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
e3840d9bcedfe7017e49ee5d05bd1c46

SHA1
272620fb2605bd196df471d62db4b2d280a363c6

SHA256
3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

SHA512
76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

Filesize
944B

MD5
9d17e8585400bc639a8b261083920ec3

SHA1
aef71cce477bd67115a4e2a0a86e6b8f0f62e30a

SHA256
81fa386fa9b3d185839bec826c3f8cc422e1f329792b901d61be826d42a57fc1

SHA512
235c6644c1349c77f2805c400fd1091a8775b7e63a2ba2e360418faaeb8b696da13ea7bb33a2d92b35f3fafd30fa6945c2398fba7bba39cf5f037a7d900878d5

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

Filesize
944B

MD5
df808b11175970c23f00e611a7b6d2cc

SHA1
0243f099e483fcafb6838c0055982e65634b6db6

SHA256
2d5eec6aeee0c568d08cc1777a67b529dce3133efc761ef4b4643d4b2003d43d

SHA512
c7c4e39be7cb6bfda48055cd2b0b05a6b6a71131a124730f62928600a5870303e06e3db54634c45f86310413126d2524f51002d5f36f7012e41b641992b5ac89

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bdp0jgx1.bff.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\SystemUser32.exe

Filesize
71KB

MD5
4eee730e3f4cd1e6b1f2455dbf51f5b7

SHA1
c95911de37debd2e3df1c630ddeeac4968413296

SHA256
5e0fbebfe54253ec36ca1b69bb380e2568de6fb650185438068b77212ad6d23e

SHA512
7caf0d07acc752c16c29d77c4ae0c67163367435ec7fe6109ed1561f4c2320c9a54449e911d48d627606c822108fbe48b4193201adee5137015837359e1768f4

Download Submit
memory/900-1-0x00000000005D0000-0x00000000005E8000-memory.dmp

Filesize
96KB

Download
memory/900-2-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/900-0-0x00007FFD852D3000-0x00007FFD852D5000-memory.dmp

Filesize
8KB

Download
memory/900-56-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/900-55-0x000000001B9A0000-0x000000001BAAA000-memory.dmp

Filesize
1.0MB

Download
memory/2480-4-0x0000018864870000-0x0000018864892000-memory.dmp

Filesize
136KB

Download
memory/2480-19-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/2480-18-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/2480-15-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/2480-14-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/2480-13-0x00007FFD852D0000-0x00007FFD85D92000-memory.dmp

Filesize
10.8MB

Download
memory/2480-3-0x00007FFD852D0000-0x00007FFD85D92000-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