xworm | 2721b3feda88f242a54f83dfcd50d6356ae11a4374a816790cc90c00eb990ba1

General

Target

Bypass3_Pure_Mode.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
behavioral1/memory/2668-12-0x00000000001F0000-0x0000000000200000-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

1296 powershell.exe
2972 powershell.exe
1060 powershell.exe
344 powershell.exe

pid	process
1296	powershell.exe
2972	powershell.exe
1060	powershell.exe
344	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

1276 example.exe
2668 XClient.exe
Loads dropped DLL 1 IoCs

Processes:

Bypass3_Pure_Mode.exe

pid process

2164 Bypass3_Pure_Mode.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

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

System Information Discovery
T1082

pid	process
2164	Bypass3_Pure_Mode.exe

flow	ioc
14	ip-api.com

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

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

pid	process
1276	example.exe
1276	example.exe
1276	example.exe
1276	example.exe
1276	example.exe
1296	powershell.exe
2972	powershell.exe
1060	powershell.exe
344	powershell.exe
2668	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2668	XClient.exe
Token: SeDebugPrivilege	1296	powershell.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	1060	powershell.exe
Token: SeDebugPrivilege	344	powershell.exe
Token: SeDebugPrivilege	2668	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

2668 XClient.exe

pid	process
2668	XClient.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

Bypass3_Pure_Mode.exeexample.execmd.exeXClient.exe

description	pid	process	target process
PID 2164 wrote to memory of 1276	2164	Bypass3_Pure_Mode.exe	example.exe
PID 2164 wrote to memory of 1276	2164	Bypass3_Pure_Mode.exe	example.exe
PID 2164 wrote to memory of 1276	2164	Bypass3_Pure_Mode.exe	example.exe
PID 2164 wrote to memory of 2668	2164	Bypass3_Pure_Mode.exe	XClient.exe
PID 2164 wrote to memory of 2668	2164	Bypass3_Pure_Mode.exe	XClient.exe
PID 2164 wrote to memory of 2668	2164	Bypass3_Pure_Mode.exe	XClient.exe
PID 1276 wrote to memory of 1932	1276	example.exe	cmd.exe
PID 1276 wrote to memory of 1932	1276	example.exe	cmd.exe
PID 1276 wrote to memory of 1932	1276	example.exe	cmd.exe
PID 1932 wrote to memory of 2664	1932	cmd.exe	certutil.exe
PID 1932 wrote to memory of 2664	1932	cmd.exe	certutil.exe
PID 1932 wrote to memory of 2664	1932	cmd.exe	certutil.exe
PID 1932 wrote to memory of 2624	1932	cmd.exe	find.exe
PID 1932 wrote to memory of 2624	1932	cmd.exe	find.exe
PID 1932 wrote to memory of 2624	1932	cmd.exe	find.exe
PID 1932 wrote to memory of 2792	1932	cmd.exe	find.exe
PID 1932 wrote to memory of 2792	1932	cmd.exe	find.exe
PID 1932 wrote to memory of 2792	1932	cmd.exe	find.exe
PID 2668 wrote to memory of 1296	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 1296	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 1296	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 2972	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 2972	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 2972	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 1060	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 1060	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 1060	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 344	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 344	2668	XClient.exe	powershell.exe
PID 2668 wrote to memory of 344	2668	XClient.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\Bypass3_Pure_Mode.exe
"C:\Users\Admin\AppData\Local\Temp\Bypass3_Pure_Mode.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2164

C:\Users\Admin\example.exe
"C:\Users\Admin\example.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1276

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:1932

C:\Windows\system32\certutil.exe
certutil -hashfile "C:\Users\Admin\example.exe" MD5
4⤵
PID:2664

C:\Windows\system32\find.exe
find /i /v "md5"
4⤵
PID:2624

C:\Windows\system32\find.exe
find /i /v "certutil"
4⤵
PID:2792

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:2668

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:1296

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:2972

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:1060

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:344

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
8ad400236dd9a680a5cf078da5d065e0

SHA1
fae1e7bd4a81cf22780c315c2ab80272e0542606

SHA256
4f78ed16cee8676c277f1f01060dd22ca5a31c48c6654735e545bf5ac04b6bcb

SHA512
4e1b34f3ac13f2eb8737131d084474d22a5020f771d28e007ba1b5ed7ead13ea926b5fcb1927283bfb56284a8abf0b1ecde58b7d012e4abfc206cb511134ace0

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
\??\PIPE\srvsvc
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/1296-19-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/1296-20-0x0000000002920000-0x0000000002928000-memory.dmp

Filesize
32KB

Download
memory/2164-0-0x000007FEF5F13000-0x000007FEF5F14000-memory.dmp

Filesize
4KB

Download
memory/2164-1-0x0000000000F80000-0x000000000103C000-memory.dmp

Filesize
752KB

Download
memory/2668-14-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2668-12-0x00000000001F0000-0x0000000000200000-memory.dmp

Filesize
64KB

Download
memory/2668-43-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-27-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2972-26-0x000000001B850000-0x000000001BB32000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads