xworm | 2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1

General

Target

2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe
Size

724KB
MD5

6e1e63e97c09758e3db18ea31bd95284
SHA1

6f4a188d43122d22a14459123764a094ed56b37c
SHA256

2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1
SHA512

0708ebbc263c5f16fddb0e1e76abf30b3ff5842207f450e0892e0879f828ecf165a203f156f460ed3cb97dd85691c0f3dc2233160b98e7daf34057872c70ba23
SSDEEP

12288:7DeaBr2968/mPSxX7UydfxMApCPuiRMfOzzH3t2zrNkjovC7Qe1RwUdaZkgsZyL:3Pp8/2Sx/xMA8miRSO3H3t8aDaXs8

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

45.141.27.41:7000

Mutex

9ZF9ZsOZGh1T1r1n

Attributes

Install_directory
%Public%
install_file
csrss.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\XClient.exe	family_xworm
behavioral2/memory/3960-49-0x0000000000FA0000-0x0000000000FB0000-memory.dmp	family_xworm

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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

3120 powershell.exe
2168 powershell.exe
4640 powershell.exe
4912 powershell.exe

pid	process
3120	powershell.exe
2168	powershell.exe
4640	powershell.exe
4912	powershell.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\csrss.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\csrss.lnk	XClient.exe

Executes dropped EXE 2 IoCs

Processes:

example.exeXClient.exe

pid process

3292 example.exe
3960 XClient.exe
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

5 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
5	ip-api.com

Suspicious behavior: EnumeratesProcesses 19 IoCs

Processes:

example.exepowershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3292	example.exe
3120	powershell.exe
3120	powershell.exe
2168	powershell.exe
2168	powershell.exe
4640	powershell.exe
4640	powershell.exe
4912	powershell.exe
4912	powershell.exe
3960	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	3960	XClient.exe
Token: SeDebugPrivilege	3120	powershell.exe
Token: SeDebugPrivilege	2168	powershell.exe
Token: SeDebugPrivilege	4640	powershell.exe
Token: SeDebugPrivilege	4912	powershell.exe
Token: SeDebugPrivilege	3960	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

3960 XClient.exe

pid	process
3960	XClient.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exeexample.execmd.exeXClient.exe

description	pid	process	target process
PID 4368 wrote to memory of 3292	4368	2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe	example.exe
PID 4368 wrote to memory of 3292	4368	2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe	example.exe
PID 4368 wrote to memory of 3960	4368	2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe	XClient.exe
PID 4368 wrote to memory of 3960	4368	2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe	XClient.exe
PID 3292 wrote to memory of 2340	3292	example.exe	cmd.exe
PID 3292 wrote to memory of 2340	3292	example.exe	cmd.exe
PID 2340 wrote to memory of 2716	2340	cmd.exe	certutil.exe
PID 2340 wrote to memory of 2716	2340	cmd.exe	certutil.exe
PID 2340 wrote to memory of 2232	2340	cmd.exe	find.exe
PID 2340 wrote to memory of 2232	2340	cmd.exe	find.exe
PID 2340 wrote to memory of 4036	2340	cmd.exe	find.exe
PID 2340 wrote to memory of 4036	2340	cmd.exe	find.exe
PID 3960 wrote to memory of 3120	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 3120	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 2168	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 2168	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 4640	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 4640	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 4912	3960	XClient.exe	powershell.exe
PID 3960 wrote to memory of 4912	3960	XClient.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe
"C:\Users\Admin\AppData\Local\Temp\2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4368

C:\Users\Admin\example.exe
"C:\Users\Admin\example.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3292

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c certutil -hashfile "C:\Users\Admin\example.exe" MD5 | find /i /v "md5" | find /i /v "certutil"
3⤵
- Suspicious use of WriteProcessMemory
PID:2340

C:\Windows\system32\certutil.exe
certutil -hashfile "C:\Users\Admin\example.exe" MD5
4⤵
PID:2716

C:\Windows\system32\find.exe
find /i /v "md5"
4⤵
PID:2232

C:\Windows\system32\find.exe
find /i /v "certutil"
4⤵
PID:4036

C:\Users\Admin\XClient.exe
"C:\Users\Admin\XClient.exe"
2⤵
- Drops startup file
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3960

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\XClient.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3120

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2168

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\csrss.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4640

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'csrss.exe'
3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4912

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
21017c68eaf9461301de459f4f07e888

SHA1
41ff30fc8446508d4c3407c79e798cf6eaa5bb73

SHA256
03b321e48ff3328d9c230308914961fe110c4c7bc96c0a85a296745437bcb888

SHA512
956990c11c6c1baa3665ef7ef23ef6073e0a7fcff77a93b5e605a83ff1e60b916d80d45dafb06977aed90868a273569a865cf2c623e295b5157bfff0fb2be35d

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
795938d4c6e7dbca544ec4bdca81c53a

SHA1
0ca41665a9b6b0c3159211aed5fc595de98afb6b

SHA256
dc400265ecb7f850894b2b648b956964d4fe75639f76bb3634a1f73c3182dbcb

SHA512
19d36e5b648a1d5faa7d7d67d454f0157f99a546532bcf538b1ff81b4acc126124ea937e143a49eb91dce2e657a53378b327078aaacb5c2a8c54a5249a5efff5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wsi1tj4l.1hv.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\XClient.exe
Filesize
40KB

MD5
7ea387ab126b2ecf3365d448a318a433

SHA1
71b6e05898b68ed72ca95266d6293b225c40b612

SHA256
573f3d316ed68ea2d4762a657dcc62416b763a8fcd1f99017f02d3ef5c215015

SHA512
68830f84bf9f0a9e75a999907f7e7d816f89aa745e92078f56f303edadb236e14957e0594290f297fd4c0175ae72be02542cabe974a404fe961b7ab4bf945825

Download Submit
C:\Users\Admin\example.exe
Filesize
673KB

MD5
56a9b5d3e447355a8d29a2d02a00b70c

SHA1
af802aab037d6ae208b040e4e0b629665f208394

SHA256
8d33c98d8aa62cbcc5d9096aa93fe073f0ee012af6cea9f19daad0d8e08d0ff1

SHA512
c9d4de01e7c472d48ecee70777cac1f3ab3959fdb863c27096898b339e5f53e319489080ca08d3b18659ab396a16a18638fbebe06e58546ddeb2b5b5ca593081

Download Submit
memory/3120-59-0x00000240E3620000-0x00000240E3642000-memory.dmp

Filesize
136KB

Download
memory/3960-50-0x00007FFC63370000-0x00007FFC63E32000-memory.dmp

Filesize
10.8MB

Download
memory/3960-49-0x0000000000FA0000-0x0000000000FB0000-memory.dmp

Filesize
64KB

Download
memory/3960-97-0x00007FFC63370000-0x00007FFC63E32000-memory.dmp

Filesize
10.8MB

Download
memory/4368-0-0x00007FFC63373000-0x00007FFC63375000-memory.dmp

Filesize
8KB

Download
memory/4368-1-0x0000000000830000-0x00000000008EC000-memory.dmp

Filesize
752KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads