xworm | b19045dbcc841cd63be96bbaf0f5df366007fdd5180a1f62ef797e536a5d4c4b

General

Target

Fnf corrupted.exe
Size

78KB
MD5

710b59f8d37ce666e92409c4cc7e689b
SHA1

4b19d66b474ae5f756c2bba40b7f082dfd3ce5d1
SHA256

7f82852a215358e470c81965753d605ab93aa2099c2b7e7953c0f9357dcba32a
SHA512

267270b9c9dce113225b3cfa6bacb5a1da6b9ea7595601eb4165c44d5ddeb8a38966612aced27b6ee64547c0c5fc970431743a7b9955ab70bdccbb81ec24feeb
SSDEEP

1536:gdV1slxb8Bs9/weqAk+bJLn+0U66VqljwONk5Yw2NYZe:g23brqP+bJLRYVijwONIYNNke

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

loss-winners.gl.at.ply.gg:1567

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3540-1-0x00000000007A0000-0x00000000007BA000-memory.dmp	family_xworm

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
3504	powershell.exe
1916	powershell.exe
3972	powershell.exe
536	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-1403246978-718555486-3105247137-1000\Control Panel\International\Geo\Nation	Fnf corrupted.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	Fnf corrupted.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	Fnf corrupted.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-1-5-21-1403246978-718555486-3105247137-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	Fnf corrupted.exe

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
536	powershell.exe
536	powershell.exe
3504	powershell.exe
3504	powershell.exe
1916	powershell.exe
1916	powershell.exe
3972	powershell.exe
3972	powershell.exe
3540	Fnf corrupted.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3540	Fnf corrupted.exe
Token: SeDebugPrivilege	536	powershell.exe
Token: SeDebugPrivilege	3504	powershell.exe
Token: SeDebugPrivilege	1916	powershell.exe
Token: SeDebugPrivilege	3972	powershell.exe
Token: SeDebugPrivilege	3540	Fnf corrupted.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3540	Fnf corrupted.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3540 wrote to memory of 536	3540	Fnf corrupted.exe	89
PID 3540 wrote to memory of 536	3540	Fnf corrupted.exe	89
PID 3540 wrote to memory of 3504	3540	Fnf corrupted.exe	93
PID 3540 wrote to memory of 3504	3540	Fnf corrupted.exe	93
PID 3540 wrote to memory of 1916	3540	Fnf corrupted.exe	95
PID 3540 wrote to memory of 1916	3540	Fnf corrupted.exe	95
PID 3540 wrote to memory of 3972	3540	Fnf corrupted.exe	97
PID 3540 wrote to memory of 3972	3540	Fnf corrupted.exe	97

C:\Users\Admin\AppData\Local\Temp\Fnf corrupted.exe
"C:\Users\Admin\AppData\Local\Temp\Fnf corrupted.exe"
1⤵
- Checks computer location settings
- 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:3540
- 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\Fnf corrupted.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:536
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Fnf corrupted.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3504
- 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'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1916
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3972

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

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\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
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

Filesize
944B

MD5
cc19bcff372d20459d3651ba8aef50e7

SHA1
3c6f1d4cdd647864fb97a16b1aefba67fcee11f7

SHA256
366473e774d8976c7fd4dc582220666fb61a4feb3f7c95e69b2a68ad9e446ec9

SHA512
a0e360ca4b6e874fd44612bf4b17f3722c0619da4f6bade12a62efadae88c2d33460114eaafa2bc3fb1cef5bea07e745b8bee24f15d0cacaff5f4a521b225080

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qasrzxtd.bng.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/536-12-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download
memory/536-14-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download
memory/536-17-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download
memory/536-18-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download
memory/536-13-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download
memory/536-7-0x0000022ECF870000-0x0000022ECF892000-memory.dmp

Filesize
136KB

Download
memory/3540-0-0x00007FFD8DD63000-0x00007FFD8DD65000-memory.dmp

Filesize
8KB

Download
memory/3540-1-0x00000000007A0000-0x00000000007BA000-memory.dmp

Filesize
104KB

Download
memory/3540-57-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download
memory/3540-58-0x00007FFD8DD63000-0x00007FFD8DD65000-memory.dmp

Filesize
8KB

Download
memory/3540-59-0x00007FFD8DD60000-0x00007FFD8E821000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads