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/0x000b000000023be5-25.dat	family_xworm
behavioral2/memory/2808-26-0x000001A3EE1C0000-0x000001A3EE1D0000-memory.dmp	family_xworm
behavioral2/memory/1920-28-0x0000000000400000-0x000000000040E000-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
4	2808	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
4	2808	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 1920	2808	powershell.exe	95

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2808	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
2808	powershell.exe
2808	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2808	powershell.exe
Token: SeDebugPrivilege	1920	MSBuild.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 4216	2808	powershell.exe	93
PID 2808 wrote to memory of 4216	2808	powershell.exe	93
PID 4216 wrote to memory of 4816	4216	csc.exe	94
PID 4216 wrote to memory of 4816	4216	csc.exe	94
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95
PID 2808 wrote to memory of 1920	2808	powershell.exe	95

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:2808
- 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\thfaitcb\thfaitcb.cmdline"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4216
- - 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\RESDC75.tmp" "c:\Users\Admin\AppData\Local\Temp\thfaitcb\CSC375EB28CB4904D0798363852F8AD662A.TMP"
    3⤵
    PID:4816
- 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:1920

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\RESDC75.tmp

Filesize
1KB

MD5
68518deb9a6bf05ca6fe7e08ec3e177c

SHA1
d66be1689357b5fa0e228f9fd2028ccdf123a41b

SHA256
44fe51477a194d072128be6cf8b15ae15949ad95a683347d69446c5b7f5c7228

SHA512
e581b134c5376e1f2a16e7c4a6d2e6dd0250a91c67c5ddbe93a3255c4fcbf19dc2d7ca2e76e33f3b1fd7d463a5abec090cf63ff2f592be66fca54dce88b85fb8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lbpzgk3h.ctx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
42KB

MD5
0fc4b5749a689bf28460eed71046bd5f

SHA1
a9999cd742dadd45fb25843b0311500eb7662909

SHA256
60dd1f933ed0eba7b2a5cfb7c1073d8ba65b5c4aa1c753c87e3d169be43d99ca

SHA512
3e88f98c417a0fe5d21b12bcccaa91b58513a07702ed0beb23013f35871f0464f65bb75e2bf9e46359656e783fae80a0b88d41c9a379cbe3d9e8f69f1ad1f65f

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\thfaitcb\CSC375EB28CB4904D0798363852F8AD662A.TMP

Filesize
652B

MD5
8fff27260f1321bbeaa7fea62486432b

SHA1
026a1d5d9f37bbe2408ddb14507797dcb682d053

SHA256
de83c9d6d4e83106503cced7c060eabdb61fa8d2809667753e2c154c30029872

SHA512
3e986f4a472db8a9ab4306f66bb9de9b96387096846391fb0c1020381dffb4b947289f6058dea0296ada86e1ea1dd8bbd130cde476a39cba9555878c5a2ffc18

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

Filesize
104KB

MD5
4c235e59a96c8c09a6f7e97b95772164

SHA1
7350cfb88fbf6a2e7a9b12ad85f12e174b22b76a

SHA256
3a8459f7033c4dec0a2a8ee37090fa2fe38a2013667c969ac870965deb0b8c8d

SHA512
0857cc0c6c0aa7204772873a02fbeb11a05d0c890241eedaee6bf4fdd3a4ceaf18e6d612c7e3d47ba1c077104cf91809b133dc2420864d16cd15315c2d47cdf9

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

Filesize
204B

MD5
fd933279ea728ff3433922c6a6613e49

SHA1
560025fd87011f0d206ed6904adde23e8853a48e

SHA256
f320ca23752524c4983228bef08f38f8a64303ae95ec01e346ad4dfdb4d3af9f

SHA512
7157fa461b2cde5766ed3f90f06ba208c66f95593c12bfce6a5c72054e609aee6d24bdcfe1efc608a74404eda860748e4b55760f94d1f920bdd8f692b89d1e56

Download Submit
memory/1920-33-0x000000007501E000-0x000000007501F000-memory.dmp

Filesize
4KB

Download
memory/1920-34-0x0000000005400000-0x000000000549C000-memory.dmp

Filesize
624KB

Download
memory/1920-40-0x0000000006B30000-0x00000000070D4000-memory.dmp

Filesize
5.6MB

Download
memory/1920-39-0x00000000064E0000-0x0000000006572000-memory.dmp

Filesize
584KB

Download
memory/1920-38-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/1920-37-0x0000000005B10000-0x0000000005B76000-memory.dmp

Filesize
408KB

Download
memory/1920-28-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/1920-36-0x000000007501E000-0x000000007501F000-memory.dmp

Filesize
4KB

Download
memory/1920-35-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/2808-26-0x000001A3EE1C0000-0x000001A3EE1D0000-memory.dmp

Filesize
64KB

Download
memory/2808-0-0x00007FFCF6543000-0x00007FFCF6545000-memory.dmp

Filesize
8KB

Download
memory/2808-32-0x00007FFCF6540000-0x00007FFCF7001000-memory.dmp

Filesize
10.8MB

Download
memory/2808-31-0x000001A3EDE80000-0x000001A3EE09C000-memory.dmp

Filesize
2.1MB

Download
memory/2808-13-0x000001A3EE350000-0x000001A3EE3A6000-memory.dmp

Filesize
344KB

Download
memory/2808-10-0x000001A3EE1D0000-0x000001A3EE1F2000-memory.dmp

Filesize
136KB

Download
memory/2808-11-0x00007FFCF6540000-0x00007FFCF7001000-memory.dmp

Filesize
10.8MB

Download
memory/2808-12-0x00007FFCF6540000-0x00007FFCF7001000-memory.dmp

Filesize
10.8MB

Download

Analysis

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