xworm | 995b076987f2c8c9217c04b52f4a618dd317d5d5415b3898ba107d12a8e9522d

General

Target

Nerest sofr/bin/!LOADER.exe
Size

6.9MB
MD5

de24df122fbc3293087f4939c6fb8b16
SHA1

a061e90c61d9ca357d0f4592bd0768432338fa94
SHA256

ccccf05053891883f6268a31390b3a731fa6b787b16e2c0dd429a31e5878acb0
SHA512

ac27ee610c535d3f5eaf6c03ffc7dd59d30f96bb81e029258f507cffdb243db87533ca10b79846810e624223ac6cd5515c10832f1e907fd37edd4ef6365eb503
SSDEEP

196608:GKah1rbvnKfTMLXla7cJz/FUtUK+hLFV/Ap:GKa7r+fTMLXla7cJTM7+h4p

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

back-spots.gl.at.ply.gg:21395

Attributes

Install_directory
%Temp%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral4/files/0x000c000000023b85-4.dat	family_xworm
behavioral4/memory/3744-13-0x00000000006A0000-0x00000000006C6000-memory.dmp	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
4176	powershell.exe
3736	powershell.exe
2028	powershell.exe
2368	powershell.exe

Checks computer location settings 2 TTPs 2 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	!LOADER.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	!LOADER.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
3744	!LOADER.exe
2312	conhost
1128	conhost
1004	conhost

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\conhost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\conhost"	!LOADER.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
13	ip-api.com

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	!LOADER.exe

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
4744	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4176	powershell.exe
4176	powershell.exe
3736	powershell.exe
3736	powershell.exe
2028	powershell.exe
2028	powershell.exe
2368	powershell.exe
2368	powershell.exe
3744	!LOADER.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	3744	!LOADER.exe
Token: SeDebugPrivilege	4176	powershell.exe
Token: SeDebugPrivilege	3736	powershell.exe
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	2368	powershell.exe
Token: SeDebugPrivilege	3744	!LOADER.exe
Token: SeDebugPrivilege	2312	conhost
Token: SeDebugPrivilege	1128	conhost
Token: SeDebugPrivilege	1004	conhost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3744	!LOADER.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 3744	2500	!LOADER.exe	83
PID 2500 wrote to memory of 3744	2500	!LOADER.exe	83
PID 3744 wrote to memory of 4176	3744	!LOADER.exe	88
PID 3744 wrote to memory of 4176	3744	!LOADER.exe	88
PID 3744 wrote to memory of 3736	3744	!LOADER.exe	90
PID 3744 wrote to memory of 3736	3744	!LOADER.exe	90
PID 3744 wrote to memory of 2028	3744	!LOADER.exe	92
PID 3744 wrote to memory of 2028	3744	!LOADER.exe	92
PID 3744 wrote to memory of 2368	3744	!LOADER.exe	94
PID 3744 wrote to memory of 2368	3744	!LOADER.exe	94
PID 3744 wrote to memory of 4744	3744	!LOADER.exe	96
PID 3744 wrote to memory of 4744	3744	!LOADER.exe	96

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\Nerest sofr\bin\!LOADER.exe
"C:\Users\Admin\AppData\Local\Temp\Nerest sofr\bin\!LOADER.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Users\Admin\AppData\Local\Temp\!LOADER.exe
  "C:\Users\Admin\AppData\Local\Temp\!LOADER.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3744
- - 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\!LOADER.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4176
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '!LOADER.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3736
- - 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\conhost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2028
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2368
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "conhost" /tr "C:\Users\Admin\AppData\Local\Temp\conhost"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4744

C:\Users\Admin\AppData\Local\Temp\conhost
C:\Users\Admin\AppData\Local\Temp\conhost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2312

C:\Users\Admin\AppData\Local\Temp\conhost
C:\Users\Admin\AppData\Local\Temp\conhost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1128

C:\Users\Admin\AppData\Local\Temp\conhost
C:\Users\Admin\AppData\Local\Temp\conhost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1004

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\conhost.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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

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

Filesize
944B

MD5
66443e58ceca538342de8ebc6484ddac

SHA1
d6eab7930d1a307a82f80d3f3ac8a4c54b1a1f35

SHA256
3eaeb86ceade9a1a0e62d63116bb449101dfb0b8f2d698cc696653a7a32d6ead

SHA512
eb78507cfe33432270c0fa3208ba40a451eb1ce4a32c8af23299199fba5d85629e0c0e31ec6c78df77f7a680162f2e9952171e706d4fb8cfbb2a5576661d7585

Download Submit
C:\Users\Admin\AppData\Local\Temp\!LOADER.exe

Filesize
125KB

MD5
0324d4d7ff2026809d8c3f4bd0f3573e

SHA1
73f39a2778bbaa29246a75a7274b8bc7836bd329

SHA256
e14dbac690979b4fa9b2fee4a8221bfdcb03500458d3f9c8912fa1e0e4674492

SHA512
0209d6abb503a2698ee3bb8393da8b7622c3f6318f7aff8173a2406abc31d5d422002ab47113a85e2b7dc292d6735c23fd083aa1c1de4dd275a6e0f28e091f6b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xub4cavu.piu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2500-12-0x0000000000400000-0x0000000000AE2000-memory.dmp

Filesize
6.9MB

Download
memory/3744-14-0x00007FFF0CB80000-0x00007FFF0D641000-memory.dmp

Filesize
10.8MB

Download
memory/3744-13-0x00000000006A0000-0x00000000006C6000-memory.dmp

Filesize
152KB

Download
memory/3744-64-0x00007FFF0CB80000-0x00007FFF0D641000-memory.dmp

Filesize
10.8MB

Download
memory/3744-69-0x0000000002740000-0x000000000274C000-memory.dmp

Filesize
48KB

Download
memory/3744-11-0x00007FFF0CB83000-0x00007FFF0CB85000-memory.dmp

Filesize
8KB

Download
memory/4176-15-0x000001F53BFD0000-0x000001F53BFF2000-memory.dmp

Filesize
136KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads