xworm | 22b8c4ed7f497d77701df17eb46149e91521f4ba339ca8383d83d3f99e26986c

General

Target

CLENT.exe
Size

41KB
MD5

be28690cdf6506575c00e0cec6757c66
SHA1

13a72c99c837ec405d7861bf8e768a986bb9429e
SHA256

22b8c4ed7f497d77701df17eb46149e91521f4ba339ca8383d83d3f99e26986c
SHA512

f6bf3455b453766d61c4531a91a86829b277f91dbd9dcffa41fbd37b349ce33dc93a8ffe1f14dcb3927939c8973c90ec24fbdf1d21ff27bbc1be5275be999cee
SSDEEP

768:DNreDweeLOoHdSgDdeLRXvgggULJF5PG9pmjD6vOwh53Euzp:D4DweQldSgDI9Xvvg+FI9AjD6vOwjFV

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:29058

tue-jake.gl.at.ply.gg:29058

Mutex

uLAf44bP3Na3sWni

Attributes

Install_directory
%AppData%
install_file
$77client.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1240-0-0x0000000000770000-0x0000000000780000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\$77client.exe	family_xworm

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

Drops startup file 2 IoCs

Processes:

CLENT.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77client.lnk	CLENT.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77client.lnk	CLENT.exe

Executes dropped EXE 2 IoCs

Processes:

$77client.exe$77client.exe

pid process

3972 $77client.exe
1344 $77client.exe

pid	process
3972	$77client.exe
1344	$77client.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

CLENT.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2551177587-3778486488-1329702901-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77client = "C:\\Users\\Admin\\AppData\\Roaming\\$77client.exe"	CLENT.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

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

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

5044 schtasks.exe

flow	ioc
1	ip-api.com

pid	process
5044	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeCLENT.exe

pid	process
4492	powershell.exe
4492	powershell.exe
336	powershell.exe
336	powershell.exe
972	powershell.exe
972	powershell.exe
2024	powershell.exe
2024	powershell.exe
1240	CLENT.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

CLENT.exepowershell.exepowershell.exepowershell.exepowershell.exe$77client.exe$77client.exe

description	pid	process
Token: SeDebugPrivilege	1240	CLENT.exe
Token: SeDebugPrivilege	4492	powershell.exe
Token: SeDebugPrivilege	336	powershell.exe
Token: SeDebugPrivilege	972	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	1240	CLENT.exe
Token: SeDebugPrivilege	3972	$77client.exe
Token: SeDebugPrivilege	1344	$77client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

CLENT.exe

pid process

1240 CLENT.exe

pid	process
1240	CLENT.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

CLENT.exe

description	pid	process	target process
PID 1240 wrote to memory of 4492	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 4492	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 336	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 336	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 972	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 972	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 2024	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 2024	1240	CLENT.exe	powershell.exe
PID 1240 wrote to memory of 5044	1240	CLENT.exe	schtasks.exe
PID 1240 wrote to memory of 5044	1240	CLENT.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\CLENT.exe
"C:\Users\Admin\AppData\Local\Temp\CLENT.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1240

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\CLENT.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4492

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'CLENT.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:336

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\$77client.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:972

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77client.exe'
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2024

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77client" /tr "C:\Users\Admin\AppData\Roaming\$77client.exe"
2⤵
- Creates scheduled task(s)
PID:5044

C:\Users\Admin\AppData\Roaming\$77client.exe
C:\Users\Admin\AppData\Roaming\$77client.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3972

C:\Users\Admin\AppData\Roaming\$77client.exe
C:\Users\Admin\AppData\Roaming\$77client.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1344

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

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\$77client.exe.log
Filesize
654B

MD5
2cbbb74b7da1f720b48ed31085cbd5b8

SHA1
79caa9a3ea8abe1b9c4326c3633da64a5f724964

SHA256
e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

SHA512
ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

Download Submit
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
05b3cd21c1ec02f04caba773186ee8d0

SHA1
39e790bfe10abf55b74dfb3603df8fcf6b5e6edb

SHA256
911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8

SHA512
e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb

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

MD5
781da0576417bf414dc558e5a315e2be

SHA1
215451c1e370be595f1c389f587efeaa93108b4c

SHA256
41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

SHA512
24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

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

MD5
8cb7f4b4ab204cacd1af6b29c2a2042c

SHA1
244540c38e33eac05826d54282a0bfa60340d6a1

SHA256
4994013dabe4f131d401879278eee147add6349124ea6452358dca7e2344c7a6

SHA512
7651cb6863a425840db610253151e271d3e8da26a8c633ce484247266fa226792ecb84b9578df3ab17fef84a5dfcad417b63a7df59c9650a907e08d59b91dd6e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rg5qhrji.tiu.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\$77client.exe
Filesize
41KB

MD5
be28690cdf6506575c00e0cec6757c66

SHA1
13a72c99c837ec405d7861bf8e768a986bb9429e

SHA256
22b8c4ed7f497d77701df17eb46149e91521f4ba339ca8383d83d3f99e26986c

SHA512
f6bf3455b453766d61c4531a91a86829b277f91dbd9dcffa41fbd37b349ce33dc93a8ffe1f14dcb3927939c8973c90ec24fbdf1d21ff27bbc1be5275be999cee

Download Submit
memory/1240-1-0x00007FFDFEE30000-0x00007FFDFF8F2000-memory.dmp

Filesize
10.8MB

Download
memory/1240-2-0x000000001B4B0000-0x000000001B4C0000-memory.dmp

Filesize
64KB

Download
memory/1240-0-0x0000000000770000-0x0000000000780000-memory.dmp

Filesize
64KB

Download
memory/1240-55-0x000000001CC60000-0x000000001CC6C000-memory.dmp

Filesize
48KB

Download
memory/1240-54-0x00007FFDFEE30000-0x00007FFDFF8F2000-memory.dmp

Filesize
10.8MB

Download
memory/4492-4-0x0000018930F30000-0x0000018930F52000-memory.dmp

Filesize
136KB

Download
memory/4492-18-0x00007FFDFEE30000-0x00007FFDFF8F2000-memory.dmp

Filesize
10.8MB

Download
memory/4492-15-0x0000018930F70000-0x0000018930F80000-memory.dmp

Filesize
64KB

Download
memory/4492-5-0x0000018930F70000-0x0000018930F80000-memory.dmp

Filesize
64KB

Download
memory/4492-6-0x0000018930F70000-0x0000018930F80000-memory.dmp

Filesize
64KB

Download
memory/4492-3-0x00007FFDFEE30000-0x00007FFDFF8F2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads