xworm | 7fe172c67413d3bcc1b2ae93b2cbd21eec0aa8a31198828c7dc04a310f9677cc

General

Target

a.ps1
Size

509B
MD5

5ffc54e178b40c65b7d2fb357492baf5
SHA1

d59d533638f1a755fc37129796e7731ccb6206a8
SHA256

7fe172c67413d3bcc1b2ae93b2cbd21eec0aa8a31198828c7dc04a310f9677cc
SHA512

57bcc6b7e00d4638db2d99aef02d5c06c67aee0250db7c3b23fbafa0aaeca0e0df90df1d7258a9ba65db4077ed8548a7e7b391706e28086958e8d9d087d5111c

Score

10^/10

xworm discovery execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

185.7.214.108:4411

185.7.214.54:4411

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral2/files/0x00040000000229ce-25.dat	family_xworm
behavioral2/memory/1848-26-0x00000257036E0000-0x00000257036F0000-memory.dmp	family_xworm
behavioral2/memory/1068-28-0x0000000000400000-0x000000000040E000-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	1848	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
3	1848	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1848 set thread context of 1068	1848	powershell.exe	97

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1848	powershell.exe

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 2 IoCs

pid	Process
1848	powershell.exe
1848	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1848	powershell.exe
Token: SeDebugPrivilege	1068	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1848 wrote to memory of 848	1848	powershell.exe	95
PID 1848 wrote to memory of 848	1848	powershell.exe	95
PID 848 wrote to memory of 2988	848	csc.exe	96
PID 848 wrote to memory of 2988	848	csc.exe	96
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97
PID 1848 wrote to memory of 1068	1848	powershell.exe	97

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\a.ps1
1⤵
- Blocklisted process makes network request
- Downloads MZ/PE file
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1848
- 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\zi4uguqp\zi4uguqp.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:848
- - 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\RESC062.tmp" "c:\Users\Admin\AppData\Local\Temp\zi4uguqp\CSC91C3AEEA61DD4BF88A8AE442479F579.TMP"
    3⤵
    PID:2988
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1068

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\RESC062.tmp

Filesize
1KB

MD5
ddad725e8cdde9a693157b3fb15a3a56

SHA1
7ed1ae14f2cd14285247366e6fa7802171ab8e4b

SHA256
f7daf74431576722e9ce9d3dba7c3fcc81fa842b222f8ec0f7fd74e5cd34618c

SHA512
571e222f24d1344a2c9e44235bcae4589812f8cb6ba2fcf7b6baf6f0d76145b26444f240569e28ae623c6e2970f1143ce5276189f0cd81fdf5255b65d84f1730

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cmmj20cb.ilf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\zi4uguqp\zi4uguqp.dll

Filesize
42KB

MD5
e24eaf34d17d86eb8c07bd0bf950a1ed

SHA1
a30f024374a6aaa9b8aaa397f27c570e367a319b

SHA256
3c103205fa4d290a3ed584dee98d9382fc86331eee5dc04d9c9f2593e0de1e92

SHA512
64d21f7d836f1eee8e40cd9ef0013e3211deee969ba2e9f9a7ba844a47c6f41fa119b6046b904fd2ad22408dcffa5147c9c893372583e84bc8226bcfef3a5a02

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\zi4uguqp\CSC91C3AEEA61DD4BF88A8AE442479F579.TMP

Filesize
652B

MD5
85418fbf518032014dcddbcd5e33f905

SHA1
b72ea8f52749c3bc9b78e63edc18d4b2020c6818

SHA256
5e422927c98939207d3c5aa3d61d29a4fc50520f7789489f870a4f3d228365b0

SHA512
c4f592d2f15648bfa9a09c76171cd4cc63d64371cfc1f913abfcea7675fd54f2d8a11d387896e9f678974e0814483300f7ed7ed31cf3a398509f39e1390d05da

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\zi4uguqp\zi4uguqp.0.cs

Filesize
104KB

MD5
4c235e59a96c8c09a6f7e97b95772164

SHA1
7350cfb88fbf6a2e7a9b12ad85f12e174b22b76a

SHA256
3a8459f7033c4dec0a2a8ee37090fa2fe38a2013667c969ac870965deb0b8c8d

SHA512
0857cc0c6c0aa7204772873a02fbeb11a05d0c890241eedaee6bf4fdd3a4ceaf18e6d612c7e3d47ba1c077104cf91809b133dc2420864d16cd15315c2d47cdf9

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\zi4uguqp\zi4uguqp.cmdline

Filesize
204B

MD5
35ace81f61a37e600bf8f9aafebf7509

SHA1
e4e12cee664d75f3b5caea7117d36dfff3fa29d0

SHA256
b8281bfb48511c99a9e93742e3eec36a8e0f2df91cdd8e924d26b7c34fc82186

SHA512
fffbe76b0b5b3b65ae5e9aec9543ef55d0c4780893ce3ce7b763958dc31e4ddb3106e7ad57bfb1d9beb5a467d610b4e6d53df17a5fe8e2cd187f12237e27d831

Download Submit
memory/1068-33-0x0000000005160000-0x00000000051FC000-memory.dmp

Filesize
624KB

Download
memory/1068-34-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/1068-39-0x00000000068A0000-0x0000000006E44000-memory.dmp

Filesize
5.6MB

Download
memory/1068-38-0x0000000006150000-0x00000000061E2000-memory.dmp

Filesize
584KB

Download
memory/1068-37-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/1068-36-0x000000007493E000-0x000000007493F000-memory.dmp

Filesize
4KB

Download
memory/1068-28-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1068-35-0x00000000057D0000-0x0000000005836000-memory.dmp

Filesize
408KB

Download
memory/1068-32-0x000000007493E000-0x000000007493F000-memory.dmp

Filesize
4KB

Download
memory/1848-10-0x00000257034C0000-0x00000257034E2000-memory.dmp

Filesize
136KB

Download
memory/1848-0-0x00007FFEB9F63000-0x00007FFEB9F65000-memory.dmp

Filesize
8KB

Download
memory/1848-31-0x00007FFEB9F60000-0x00007FFEBAA21000-memory.dmp

Filesize
10.8MB

Download
memory/1848-26-0x00000257036E0000-0x00000257036F0000-memory.dmp

Filesize
64KB

Download
memory/1848-13-0x0000025703680000-0x00000257036D6000-memory.dmp

Filesize
344KB

Download
memory/1848-11-0x00007FFEB9F60000-0x00007FFEBAA21000-memory.dmp

Filesize
10.8MB

Download
memory/1848-12-0x00007FFEB9F60000-0x00007FFEBAA21000-memory.dmp

Filesize
10.8MB

Download

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