xworm | 85dff73e54d9a0d0ccee788a3d4ef155a2a7d37ab9fb7a175723559d59b47cfa

Analysis

max time kernel
176s
max time network
228s
platform
windows10-2004_x64
resource
win10v2004-20230915-en
resource tags

arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
submitted
14-10-2023 10:23

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General

Target

CraxsRat Fixer.exe
Size

59.6MB
MD5

6d5ab8518cdfc5d180f20d0feeae27ed
SHA1

bb914d20bc4fdee6edd7cb4f67782570fd0f5f2d
SHA256

bfdef0348f59d57ae5c448b165ea63762049528e81134e3d6ceaac60cf910ff1
SHA512

41bb6ec8ad0c1b62b98eaac67b0d34789b482975d77acd2b8db86f76a4dd88317fd59cdf87403436039b0f62b4b139947c79862728494a42074299783334ce59
SSDEEP

1572864:FrxHmiUr0jS/dx7XKIlhKvZ3lM/D0vLGRo+aL:FJVUAYdVXTlAxVM/D0vLgmL

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

us1.localto.net:38447

Attributes

Install_directory
%AppData%
install_file
svchost.exe
telegram
https://api.telegram.org/bot6580247653:AAFPWxkGtgC3Ro7400iFKADbYKphxrFz6EA/sendMessage?chat_id=1602502747

Signatures

Detect Xworm Payload 7 IoCs

resource	yara_rule
behavioral1/files/0x0007000000023495-8.dat	family_xworm
behavioral1/files/0x0007000000023495-14.dat	family_xworm
behavioral1/files/0x0007000000023495-15.dat	family_xworm
behavioral1/memory/2188-16-0x00000000007C0000-0x00000000007DA000-memory.dmp	family_xworm
behavioral1/files/0x00060000000234a8-89.dat	family_xworm
behavioral1/files/0x00060000000234a8-90.dat	family_xworm
behavioral1/files/0x00060000000234a8-95.dat	family_xworm

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

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-1-5-21-1926387074-3400613176-3566796709-1000\Control Panel\International\Geo\Nation	CraxsRat Fixer.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1926387074-3400613176-3566796709-1000\Control Panel\International\Geo\Nation	svchost.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2188	svchost.exe
2836	svchost.exe
2464	svchost.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-1-5-21-1926387074-3400613176-3566796709-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	svchost.exe

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
3724	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2188	svchost.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2140	powershell.exe
2140	powershell.exe
3172	powershell.exe
3172	powershell.exe
4040	powershell.exe
4040	powershell.exe
3244	powershell.exe
3244	powershell.exe
3244	powershell.exe
2188	svchost.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2188	svchost.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	3172	powershell.exe
Token: SeDebugPrivilege	4040	powershell.exe
Token: SeDebugPrivilege	3244	powershell.exe
Token: SeDebugPrivilege	2188	svchost.exe
Token: SeDebugPrivilege	2836	svchost.exe
Token: SeDebugPrivilege	2464	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2188	svchost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3452 wrote to memory of 2188	3452	CraxsRat Fixer.exe	89
PID 3452 wrote to memory of 2188	3452	CraxsRat Fixer.exe	89
PID 2188 wrote to memory of 2140	2188	svchost.exe	95
PID 2188 wrote to memory of 2140	2188	svchost.exe	95
PID 2188 wrote to memory of 3172	2188	svchost.exe	98
PID 2188 wrote to memory of 3172	2188	svchost.exe	98
PID 2188 wrote to memory of 4040	2188	svchost.exe	100
PID 2188 wrote to memory of 4040	2188	svchost.exe	100
PID 2188 wrote to memory of 3244	2188	svchost.exe	105
PID 2188 wrote to memory of 3244	2188	svchost.exe	105
PID 2188 wrote to memory of 3724	2188	svchost.exe	107
PID 2188 wrote to memory of 3724	2188	svchost.exe	107

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\CraxsRat Fixer.exe
"C:\Users\Admin\AppData\Local\Temp\CraxsRat Fixer.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3452
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\svchost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2188
- - 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\RarSFX0\svchost.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2140
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3172
- - 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\svchost.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4040
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3244
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Creates scheduled task(s)
    PID:3724

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2836

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2464

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Replay Monitor

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Downloads

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\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
f41f42c322498af0591f396c59dd4304

SHA1
e1e5aa68d73d48bc5e743a34f6c0fa8960ff7514

SHA256
d8bd9a4a363ff2ac2dc887759ec6ba4215a4ce0925a8fb9c531573458ee4a31c

SHA512
2328a1b402b4fb0de9c451fb630eab58549129d3bcfb70b9834cfbd16065ebaadec006b309ea17ac182d34c53e01705cbc9e0196eb0cbd62600c866e79a1844f

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

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\svchost.exe

Filesize
82KB

MD5
a056387cda23ce0a466935f3cdbe5695

SHA1
cb95d02bf8490de615f5f0b78255d4e7728eb176

SHA256
9d9df2f7e710729c6c350801057d54d6ee063334c72908b29b1ef2209431c5a3

SHA512
d6efadc703928ee8e043458dff58a0d0b973eefd68535a9eaa8d24c34ce3327d6aee6388bcd0411e94c41391e953bffe82990ed1bab80b0d164b0fde8ac029c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\svchost.exe

Filesize
82KB

MD5
a056387cda23ce0a466935f3cdbe5695

SHA1
cb95d02bf8490de615f5f0b78255d4e7728eb176

SHA256
9d9df2f7e710729c6c350801057d54d6ee063334c72908b29b1ef2209431c5a3

SHA512
d6efadc703928ee8e043458dff58a0d0b973eefd68535a9eaa8d24c34ce3327d6aee6388bcd0411e94c41391e953bffe82990ed1bab80b0d164b0fde8ac029c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\svchost.exe

Filesize
82KB

MD5
a056387cda23ce0a466935f3cdbe5695

SHA1
cb95d02bf8490de615f5f0b78255d4e7728eb176

SHA256
9d9df2f7e710729c6c350801057d54d6ee063334c72908b29b1ef2209431c5a3

SHA512
d6efadc703928ee8e043458dff58a0d0b973eefd68535a9eaa8d24c34ce3327d6aee6388bcd0411e94c41391e953bffe82990ed1bab80b0d164b0fde8ac029c8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0erlz1bh.3cy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
82KB

MD5
a056387cda23ce0a466935f3cdbe5695

SHA1
cb95d02bf8490de615f5f0b78255d4e7728eb176

SHA256
9d9df2f7e710729c6c350801057d54d6ee063334c72908b29b1ef2209431c5a3

SHA512
d6efadc703928ee8e043458dff58a0d0b973eefd68535a9eaa8d24c34ce3327d6aee6388bcd0411e94c41391e953bffe82990ed1bab80b0d164b0fde8ac029c8

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

Filesize
82KB

MD5
a056387cda23ce0a466935f3cdbe5695

SHA1
cb95d02bf8490de615f5f0b78255d4e7728eb176

SHA256
9d9df2f7e710729c6c350801057d54d6ee063334c72908b29b1ef2209431c5a3

SHA512
d6efadc703928ee8e043458dff58a0d0b973eefd68535a9eaa8d24c34ce3327d6aee6388bcd0411e94c41391e953bffe82990ed1bab80b0d164b0fde8ac029c8

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

Filesize
82KB

MD5
a056387cda23ce0a466935f3cdbe5695

SHA1
cb95d02bf8490de615f5f0b78255d4e7728eb176

SHA256
9d9df2f7e710729c6c350801057d54d6ee063334c72908b29b1ef2209431c5a3

SHA512
d6efadc703928ee8e043458dff58a0d0b973eefd68535a9eaa8d24c34ce3327d6aee6388bcd0411e94c41391e953bffe82990ed1bab80b0d164b0fde8ac029c8

Download Submit
memory/2140-29-0x00000244E4440000-0x00000244E4450000-memory.dmp

Filesize
64KB

Download
memory/2140-18-0x00000244E4400000-0x00000244E4422000-memory.dmp

Filesize
136KB

Download
memory/2140-24-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2140-30-0x00000244E4440000-0x00000244E4450000-memory.dmp

Filesize
64KB

Download
memory/2140-32-0x00000244E4440000-0x00000244E4450000-memory.dmp

Filesize
64KB

Download
memory/2140-35-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2140-31-0x00000244E4440000-0x00000244E4450000-memory.dmp

Filesize
64KB

Download
memory/2188-49-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2188-17-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2188-16-0x00000000007C0000-0x00000000007DA000-memory.dmp

Filesize
104KB

Download
memory/2464-97-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2464-98-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2836-93-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/2836-91-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/3172-53-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/3172-51-0x0000023CA99F0000-0x0000023CA9A00000-memory.dmp

Filesize
64KB

Download
memory/3172-37-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/3172-38-0x0000023CA99F0000-0x0000023CA9A00000-memory.dmp

Filesize
64KB

Download
memory/3172-50-0x0000023CA99F0000-0x0000023CA9A00000-memory.dmp

Filesize
64KB

Download
memory/3244-82-0x00000204D91B0000-0x00000204D91C0000-memory.dmp

Filesize
64KB

Download
memory/3244-84-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/3244-70-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/3244-71-0x00000204D91B0000-0x00000204D91C0000-memory.dmp

Filesize
64KB

Download
memory/4040-67-0x0000024EEB2E0000-0x0000024EEB2F0000-memory.dmp

Filesize
64KB

Download
memory/4040-65-0x0000024EEB2E0000-0x0000024EEB2F0000-memory.dmp

Filesize
64KB

Download
memory/4040-64-0x0000024EEB2E0000-0x0000024EEB2F0000-memory.dmp

Filesize
64KB

Download
memory/4040-63-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download
memory/4040-69-0x00007FFEB1B20000-0x00007FFEB25E1000-memory.dmp

Filesize
10.8MB

Download