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
behavioral2/files/0x000c000000023b40-4.dat	family_xworm
behavioral2/memory/532-13-0x0000000000F50000-0x0000000000F76000-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
4992	powershell.exe
4956	powershell.exe
1548	powershell.exe
1212	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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	!LOADER.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\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 3 IoCs

pid	Process
532	!LOADER.exe
968	conhost
1284	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-1-5-21-4050598569-1597076380-177084960-1000\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
15	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
436	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4992	powershell.exe
4992	powershell.exe
4956	powershell.exe
4956	powershell.exe
1548	powershell.exe
1548	powershell.exe
1212	powershell.exe
1212	powershell.exe
532	!LOADER.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	532	!LOADER.exe
Token: SeDebugPrivilege	4992	powershell.exe
Token: SeDebugPrivilege	4956	powershell.exe
Token: SeDebugPrivilege	1548	powershell.exe
Token: SeDebugPrivilege	1212	powershell.exe
Token: SeDebugPrivilege	532	!LOADER.exe
Token: SeDebugPrivilege	968	conhost
Token: SeDebugPrivilege	1284	conhost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
532	!LOADER.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2792 wrote to memory of 532	2792	!LOADER.exe	82
PID 2792 wrote to memory of 532	2792	!LOADER.exe	82
PID 532 wrote to memory of 4992	532	!LOADER.exe	84
PID 532 wrote to memory of 4992	532	!LOADER.exe	84
PID 532 wrote to memory of 4956	532	!LOADER.exe	86
PID 532 wrote to memory of 4956	532	!LOADER.exe	86
PID 532 wrote to memory of 1548	532	!LOADER.exe	88
PID 532 wrote to memory of 1548	532	!LOADER.exe	88
PID 532 wrote to memory of 1212	532	!LOADER.exe	90
PID 532 wrote to memory of 1212	532	!LOADER.exe	90
PID 532 wrote to memory of 436	532	!LOADER.exe	92
PID 532 wrote to memory of 436	532	!LOADER.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\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:2792
- 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:532
- - 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:4992
- - 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:4956
- - 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:1548
- - 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:1212
- - 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:436

C:\Users\Admin\AppData\Local\Temp\conhost
C:\Users\Admin\AppData\Local\Temp\conhost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:968

C:\Users\Admin\AppData\Local\Temp\conhost
C:\Users\Admin\AppData\Local\Temp\conhost
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1284

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
9bc110200117a3752313ca2acaf8a9e1

SHA1
fda6b7da2e7b0175b391475ca78d1b4cf2147cd3

SHA256
c88e4bbb64f7fa31429ebe82c1cf07785c44486f37576f783a26ac856e02a4eb

SHA512
1f1af32aa18a8cbfcc65b0d4fb7e6ca2705f125eaa85789e981ee68b90c64522e954825abf460d4b4f97567715dfae8d9b0a25a4d54d10bc4c257c472f2e80fb

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

Filesize
944B

MD5
2117cf9865e42aacdfc8925e05fe4031

SHA1
f89be0d1409b864d85da2479dbcf4382b9a8e888

SHA256
97ed8e4e2f74329c27b63cc9b72b4af1cdc51c4dc014725b80b51da93b91192d

SHA512
83e12e1658ae4bf6b89edaa04e3e81492b9d25990745ab429ebf861915826512213ac9accc1323a5f3d71a821c07ff9010aa8772eb6b0bf6a93649b3ca112166

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_3orcv1da.bfy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/532-65-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp

Filesize
10.8MB

Download
memory/532-11-0x00007FF96A283000-0x00007FF96A285000-memory.dmp

Filesize
8KB

Download
memory/532-13-0x0000000000F50000-0x0000000000F76000-memory.dmp

Filesize
152KB

Download
memory/532-14-0x00007FF96A280000-0x00007FF96AD41000-memory.dmp

Filesize
10.8MB

Download
memory/532-64-0x00007FF96A283000-0x00007FF96A285000-memory.dmp

Filesize
8KB

Download
memory/2792-12-0x0000000000400000-0x0000000000AE2000-memory.dmp

Filesize
6.9MB

Download
memory/4992-24-0x0000029355CF0000-0x0000029355D12000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads