xworm | 3fb485dc0b2ea2a2fa5a43f84d87feb03e189951f9a1f87ff130ae114d73184c

General

Target

DeltaCrack.exe
Size

76KB
MD5

331b5c6dda37833f554e5e6c9d44e3f1
SHA1

fffef041a29de6e8074892d5ffdcc9fca9baf297
SHA256

cd9f53b64227c1bd9aac338ca4c2f52f62dfe709b5daa1ec2356ea423f7abcae
SHA512

5b1a5c7890d254c67daabbcc470bd816520f65fdaa11bf1f49756ca236685005cdb0c22454842f3610f80c0e1d566632be0a75bff8c54bb301524332bcfc136c
SSDEEP

1536:LuEnJn49wJcmzpafAuQRmYr+bSeRCNWXnn64TTEOm9i2W4YL:yEd0ucfAvwYr+btCwXFYOT2W7L

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

userxmorma-27072.portmap.host:27072

Attributes

Install_directory
%ProgramData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2760-1-0x0000000000B80000-0x0000000000B9A000-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
1856	powershell.exe
2088	powershell.exe
1312	powershell.exe
4224	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	DeltaCrack.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	DeltaCrack.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	DeltaCrack.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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	DeltaCrack.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
1856	powershell.exe
1856	powershell.exe
2088	powershell.exe
2088	powershell.exe
1312	powershell.exe
1312	powershell.exe
4224	powershell.exe
4224	powershell.exe
2760	DeltaCrack.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	DeltaCrack.exe
Token: SeDebugPrivilege	1856	powershell.exe
Token: SeDebugPrivilege	2088	powershell.exe
Token: SeDebugPrivilege	1312	powershell.exe
Token: SeDebugPrivilege	4224	powershell.exe
Token: SeDebugPrivilege	2760	DeltaCrack.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2760	DeltaCrack.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2760 wrote to memory of 1856	2760	DeltaCrack.exe	84
PID 2760 wrote to memory of 1856	2760	DeltaCrack.exe	84
PID 2760 wrote to memory of 2088	2760	DeltaCrack.exe	87
PID 2760 wrote to memory of 2088	2760	DeltaCrack.exe	87
PID 2760 wrote to memory of 1312	2760	DeltaCrack.exe	89
PID 2760 wrote to memory of 1312	2760	DeltaCrack.exe	89
PID 2760 wrote to memory of 4224	2760	DeltaCrack.exe	91
PID 2760 wrote to memory of 4224	2760	DeltaCrack.exe	91

C:\Users\Admin\AppData\Local\Temp\DeltaCrack.exe
"C:\Users\Admin\AppData\Local\Temp\DeltaCrack.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:2760
- 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\DeltaCrack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1856
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'DeltaCrack.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2088
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1312
- 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:4224

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
6e09573715495338a569f0316d59af57

SHA1
1a9fd3073801c241b276cdb8b3d7035afbcd0c8d

SHA256
bdad2d4c1b3475754cb3b9ef41a9eda243f46e30117539f81399c977a459b570

SHA512
61add4e0cfef5f138e95f0d941c39c0bce038a47fbc262d5622a0fdf46621231653adfcca3b81bef3a662a37c288e1e9644bed44591551aea5399a370afaeced

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\Temp\__PSScriptPolicyTest_tz3ehomk.uyk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1856-8-0x000001C0C0B10000-0x000001C0C0B32000-memory.dmp

Filesize
136KB

Download
memory/1856-14-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1856-17-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1856-13-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1856-12-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/2760-0-0x00007FFC30343000-0x00007FFC30345000-memory.dmp

Filesize
8KB

Download
memory/2760-1-0x0000000000B80000-0x0000000000B9A000-memory.dmp

Filesize
104KB

Download
memory/2760-56-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/2760-57-0x00007FFC30340000-0x00007FFC30E01000-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