xworm | f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29

General

Target

f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe
Size

10KB
MD5

da5c14913ef42727dd9f10c3fd81c3f2
SHA1

78cbca00e80451232a78238913c8223c20f5332e
SHA256

f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29
SHA512

5a62d75ed7118b984214afd283c2feb44e313c6955184a1be4bbbe12ef86d78363783b8ff46360379df619030b7ca7d11a17c239c848136fe2f9e4b76c1cd2d4
SSDEEP

192:AzR3Qq132ohjWCX/khjnJsv0G0DLdqn/Q7jykVpTOs:EfVZhUtlG0vdqEjykV5O

Score

10^/10

xworm evasion execution persistence rat trojan

Malware Config

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023470-8.dat	family_xworm
behavioral2/memory/436-22-0x00000000001B0000-0x000000000021A000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
4228	powershell.exe
4608	powershell.exe
2228	powershell.exe
2512	powershell.exe

Downloads MZ/PE file

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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	RuntimeBroker.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
436	RuntimeBroker.exe
4036	tdservices.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-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "C:\\Users\\Admin\\AppData\\Local\\Microsoft\\Windows\\RuntimeBroker.exe"	RuntimeBroker.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	raw.githubusercontent.com
9	raw.githubusercontent.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4228	powershell.exe
4228	powershell.exe
4608	powershell.exe
4608	powershell.exe
2228	powershell.exe
2228	powershell.exe
2512	powershell.exe
2512	powershell.exe
436	RuntimeBroker.exe

Suspicious use of AdjustPrivilegeToken 7 IoCs

description	pid	Process
Token: SeDebugPrivilege	1952	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe
Token: SeDebugPrivilege	436	RuntimeBroker.exe
Token: SeDebugPrivilege	4228	powershell.exe
Token: SeDebugPrivilege	4608	powershell.exe
Token: SeDebugPrivilege	2228	powershell.exe
Token: SeDebugPrivilege	2512	powershell.exe
Token: SeDebugPrivilege	436	RuntimeBroker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
436	RuntimeBroker.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 436	1952	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe	83
PID 1952 wrote to memory of 436	1952	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe	83
PID 1952 wrote to memory of 4036	1952	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe	84
PID 1952 wrote to memory of 4036	1952	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe	84
PID 436 wrote to memory of 4228	436	RuntimeBroker.exe	86
PID 436 wrote to memory of 4228	436	RuntimeBroker.exe	86
PID 436 wrote to memory of 4608	436	RuntimeBroker.exe	88
PID 436 wrote to memory of 4608	436	RuntimeBroker.exe	88
PID 436 wrote to memory of 2228	436	RuntimeBroker.exe	90
PID 436 wrote to memory of 2228	436	RuntimeBroker.exe	90
PID 436 wrote to memory of 2512	436	RuntimeBroker.exe	92
PID 436 wrote to memory of 2512	436	RuntimeBroker.exe	92

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe

C:\Users\Admin\AppData\Local\Temp\f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe
"C:\Users\Admin\AppData\Local\Temp\f0fe748ae439cbf48e835f24b173d1d330a91c25c22989bc27ec1f2e5f807b29.exe"
1⤵
- UAC bypass
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1952
- C:\Users\Admin\AppData\Local\Microsoft\RuntimeBroker.exe
  "C:\Users\Admin\AppData\Local\Microsoft\RuntimeBroker.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:436
- - 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\Microsoft\RuntimeBroker.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4228
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4608
- - 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\Microsoft\Windows\RuntimeBroker.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2228
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'RuntimeBroker.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2512
- C:\Users\Admin\AppData\Local\Microsoft\tdservices.exe
  "C:\Users\Admin\AppData\Local\Microsoft\tdservices.exe"
  2⤵
  - Executes dropped EXE
  PID:4036

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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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\RuntimeBroker.exe

Filesize
397KB

MD5
426658a9b3bfd147a19141e1382b51b6

SHA1
7e56370d1269af35ce2afbbf52386ecbdb5974d3

SHA256
3b2b055027ab684ff8477eb80090e9c1bbaf7ad07059ecdf73b2d5a0eca8530c

SHA512
6315b303e39dee042733a7af6e8acc784e088d653783d0215048b3ff38ed7f6110b7233cbe89f3be900b0adf3882348b8faed8cb715d8157938386d1cd80d3a3

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
fa8d1461e4feb2c39654e3a555a027f8

SHA1
0ca46b8961ceba8f9da31de5ed2408643fc89141

SHA256
7e26e4f0ef3a7d2904818a691429789c4781029ff4aab697c3b7c9a4287d661f

SHA512
e486b8f029c7eec60b6b2b5603390330afb1ddf627cc01c511808c47e68676b4c429b9f75fd4e16e48b496dccfe8cc8ec4a35825e1e889e66571acb6c03e0869

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

Filesize
944B

MD5
b1a1d8b05525b7b0c5babfd80488c1f2

SHA1
c85bbd6b7d0143676916c20fd52720499c2bb5c6

SHA256
adad192fc86c2f939fd3f70cb9ad323139a4e100f7c90b4454e2c53bdbc9b705

SHA512
346c6513c1373bab58439e37d3f75de1c5c587d7eb27076cf696e885a027b3b38d70b585839d1a2e7f2270cdcf0dac8c1fdff799f3b1158242ae9e3364c2a06e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\tdservices.exe

Filesize
1.1MB

MD5
53f178ea0c14b901bc30cc22687d384d

SHA1
b27c9ced6419575d18e0be9a79985a1937a0e8c9

SHA256
f2b707c3cf25fd49571811650b22df7f568b5cdc0c83988094599d0ece04e6c2

SHA512
02aa780af3f9d7cac30dab4718d3e6ec8a71945e022e0f56804f7016396ee2068df018f461b05c580e2555ed5de1c139a9cd30bae3475b4cd7c5ac19b284ea3d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_y25vficy.b5o.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/436-22-0x00000000001B0000-0x000000000021A000-memory.dmp

Filesize
424KB

Download
memory/436-20-0x00007FFC51220000-0x00007FFC51CE1000-memory.dmp

Filesize
10.8MB

Download
memory/436-76-0x00007FFC51220000-0x00007FFC51CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-24-0x00007FFC51220000-0x00007FFC51CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-0-0x00007FFC51223000-0x00007FFC51225000-memory.dmp

Filesize
8KB

Download
memory/1952-2-0x00007FFC51220000-0x00007FFC51CE1000-memory.dmp

Filesize
10.8MB

Download
memory/1952-1-0x000001207AA60000-0x000001207AA68000-memory.dmp

Filesize
32KB

Download
memory/4228-31-0x000002B60FBC0000-0x000002B60FBE2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads