xworm | 02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85

Analysis

max time kernel
149s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
08/06/2024, 18:13

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General

Target
02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe
Size 65KB
Sample240608-wt6ngsfa56
SHA256 02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85
MD5 6a7f3ecf7316ac97c5ec2e6ff98bb2eb
SHA1 09c0051236a026bc212ee8dcaacc3d5ba07d635f
SHA512 612432852f0e9e096c3471e111f3f9db66820cb02f9bef4f79069ef5fc8a39bba3ffba4d3356c40e68bcca183c5e88529dd60bb1800374ec88cc1aaca23838dd
SSDEEP 1536:Jwwaeov1jn8KciqTqbXb7KauCIIf6hExTMOlsCNd5v:ewovDBGqbXb7b3DoOlsC9v
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

127.0.0.1:8848
mb-each.gl.at.ply.gg:8848

Attributes

Install_directory
%LocalAppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1756-1-0x0000000000F20000-0x0000000000F36000-memory.dmp	family_xworm
behavioral1/files/0x000e0000000136fc-34.dat	family_xworm
behavioral1/memory/2312-36-0x00000000013B0000-0x00000000013C6000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

resource	yara_rule
behavioral1/memory/1756-1-0x0000000000F20000-0x0000000000F36000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/files/0x000e0000000136fc-34.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/2312-36-0x00000000013B0000-0x00000000013C6000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

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
776	powershell.exe
2572	powershell.exe
2692	powershell.exe
2512	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe

Executes dropped EXE 2 IoCs

pid	Process
2312	XClient.exe
448	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-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\XClient.exe"	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.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
4	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
2976	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2572	powershell.exe
2692	powershell.exe
2512	powershell.exe
776	powershell.exe
1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe
Token: SeDebugPrivilege	2572	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2512	powershell.exe
Token: SeDebugPrivilege	776	powershell.exe
Token: SeDebugPrivilege	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe
Token: SeDebugPrivilege	2312	XClient.exe
Token: SeDebugPrivilege	448	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1756 wrote to memory of 2572	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	29
PID 1756 wrote to memory of 2572	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	29
PID 1756 wrote to memory of 2572	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	29
PID 1756 wrote to memory of 2692	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	31
PID 1756 wrote to memory of 2692	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	31
PID 1756 wrote to memory of 2692	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	31
PID 1756 wrote to memory of 2512	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	33
PID 1756 wrote to memory of 2512	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	33
PID 1756 wrote to memory of 2512	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	33
PID 1756 wrote to memory of 776	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	35
PID 1756 wrote to memory of 776	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	35
PID 1756 wrote to memory of 776	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	35
PID 1756 wrote to memory of 2976	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	37
PID 1756 wrote to memory of 2976	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	37
PID 1756 wrote to memory of 2976	1756	02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe	37
PID 1696 wrote to memory of 2312	1696	taskeng.exe	42
PID 1696 wrote to memory of 2312	1696	taskeng.exe	42
PID 1696 wrote to memory of 2312	1696	taskeng.exe	42
PID 1696 wrote to memory of 448	1696	taskeng.exe	43
PID 1696 wrote to memory of 448	1696	taskeng.exe	43
PID 1696 wrote to memory of 448	1696	taskeng.exe	43

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\02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe
"C:\Users\Admin\AppData\Local\Temp\02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.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:1756
- 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\02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2572
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2512
- 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:776
- 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\Local\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:2976

C:\Windows\system32\taskeng.exe
taskeng.exe {25AA6F7C-2E2A-4F4F-87F4-AD4F606D5104} S-1-5-21-2297530677-1229052932-2803917579-1000:HKULBIBU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Users\Admin\AppData\Local\XClient.exe
  C:\Users\Admin\AppData\Local\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2312
- C:\Users\Admin\AppData\Local\XClient.exe
  C:\Users\Admin\AppData\Local\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:448

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

XClient.exe

Path C:\Users\Admin\AppData\Local\XClient.exe
Size 65KB
SHA256 02b66e1529ad66316c48c1da16afddd79f8c526de0acc5937b590bde73fd4a85
MD5 6a7f3ecf7316ac97c5ec2e6ff98bb2eb
SHA1 09c0051236a026bc212ee8dcaacc3d5ba07d635f
SHA512 612432852f0e9e096c3471e111f3f9db66820cb02f9bef4f79069ef5fc8a39bba3ffba4d3356c40e68bcca183c5e88529dd60bb1800374ec88cc1aaca23838dd
SSDEEP 1536:Jwwaeov1jn8KciqTqbXb7KauCIIf6hExTMOlsCNd5v:ewovDBGqbXb7b3DoOlsC9v
MD5 SHA1 SHA512 SSDEEP

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DYPNO0P68ET5PL97N5Z0.temp

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\DYPNO0P68ET5PL97N5Z0.temp
Size 7KB
SHA256 3a5a8e1c847025ecff4e9c8ac2125a8ef7af8f70d437fb55b9740eb53086aabc
MD5 16f08b2fe514d2fcae54bd4a618b5ad8
SHA1 456fe45493701e1f0f55950739e7b4e02739d761
SHA512 507e55381d2c7260d149186d1465f681c91f4cd257b02fd81de73e49c1098feec756478a0c0b5b42093445f1455e52b99215bd23326317ba178843a99db7fce3
SSDEEP 96:YAqqCZM8jnqvsqvJCwoBAqqCZM8jnqvsEHyqvJCworoB5wQHNS7qdXlUVs:obPUofbPAHnorooAS7qdr
MD5 SHA1 SHA512 SSDEEP

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memory/1756-31-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

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memory/1756-2-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

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memory/1756-0-0x000007FEF5573000-0x000007FEF5574000-memory.dmp

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memory/1756-32-0x000007FEF5570000-0x000007FEF5F5C000-memory.dmp

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memory/1756-1-0x0000000000F20000-0x0000000000F36000-memory.dmp

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memory/2312-36-0x00000000013B0000-0x00000000013C6000-memory.dmp

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memory/2572-7-0x0000000002C20000-0x0000000002CA0000-memory.dmp

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memory/2572-8-0x000000001B600000-0x000000001B8E2000-memory.dmp

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memory/2572-9-0x0000000001E10000-0x0000000001E18000-memory.dmp

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memory/2692-16-0x0000000001E90000-0x0000000001E98000-memory.dmp

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memory/2692-15-0x000000001B610000-0x000000001B8F2000-memory.dmp

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