xworm | feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f

General

Target

3ab61ee8a81099edddf87af587420a10N.exe
Size

40KB
MD5

3ab61ee8a81099edddf87af587420a10
SHA1

d6c0f6f60d13cc786cf7ac0df2c45b5dc47b945c
SHA256

feba3474a30f9b010741c34ee4773777fc329390418713ffef424b2eb9243a5f
SHA512

f43326c79ea8bd118fd90efc8c2c8306e02901727ffd7c6666b2a35820eb8799976007f4886a68a7f411509ad61dcf7ddf5a3630fa5342014ad5aa978818ff3f
SSDEEP

768:pNfPMSk3K/EzTb/008WuFZ4ZJF5PC9O9Fy68OMhi3/aV:nf05a/CTjp89IFc9Uc68OMsi

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

154.197.69.165:7000

Mutex

jcTVbnlMjCEJAYCp

Attributes

Install_directory
%AppData%
install_file
crss.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4800-1-0x0000000000DA0000-0x0000000000DB0000-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

pid	Process
4484	powershell.exe
1208	powershell.exe
2356	powershell.exe
4772	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	3ab61ee8a81099edddf87af587420a10N.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	3ab61ee8a81099edddf87af587420a10N.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	3ab61ee8a81099edddf87af587420a10N.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.

flow	ioc
20	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1208	powershell.exe
1208	powershell.exe
2356	powershell.exe
2356	powershell.exe
4772	powershell.exe
4772	powershell.exe
4484	powershell.exe
4484	powershell.exe
4800	3ab61ee8a81099edddf87af587420a10N.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4800	3ab61ee8a81099edddf87af587420a10N.exe
Token: SeDebugPrivilege	1208	powershell.exe
Token: SeDebugPrivilege	2356	powershell.exe
Token: SeDebugPrivilege	4772	powershell.exe
Token: SeDebugPrivilege	4484	powershell.exe
Token: SeDebugPrivilege	4800	3ab61ee8a81099edddf87af587420a10N.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4800	3ab61ee8a81099edddf87af587420a10N.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4800 wrote to memory of 1208	4800	3ab61ee8a81099edddf87af587420a10N.exe	89
PID 4800 wrote to memory of 1208	4800	3ab61ee8a81099edddf87af587420a10N.exe	89
PID 4800 wrote to memory of 2356	4800	3ab61ee8a81099edddf87af587420a10N.exe	91
PID 4800 wrote to memory of 2356	4800	3ab61ee8a81099edddf87af587420a10N.exe	91
PID 4800 wrote to memory of 4772	4800	3ab61ee8a81099edddf87af587420a10N.exe	93
PID 4800 wrote to memory of 4772	4800	3ab61ee8a81099edddf87af587420a10N.exe	93
PID 4800 wrote to memory of 4484	4800	3ab61ee8a81099edddf87af587420a10N.exe	95
PID 4800 wrote to memory of 4484	4800	3ab61ee8a81099edddf87af587420a10N.exe	95

C:\Users\Admin\AppData\Local\Temp\3ab61ee8a81099edddf87af587420a10N.exe
"C:\Users\Admin\AppData\Local\Temp\3ab61ee8a81099edddf87af587420a10N.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4800
- 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\3ab61ee8a81099edddf87af587420a10N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '3ab61ee8a81099edddf87af587420a10N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2356
- 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\crss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'crss.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4484

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_s1ppgrpv.giu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1208-3-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-14-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-15-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-18-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/1208-10-0x000001DE63330000-0x000001DE63352000-memory.dmp

Filesize
136KB

Download
memory/4800-0-0x00007FFACED13000-0x00007FFACED15000-memory.dmp

Filesize
8KB

Download
memory/4800-2-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/4800-1-0x0000000000DA0000-0x0000000000DB0000-memory.dmp

Filesize
64KB

Download
memory/4800-57-0x00007FFACED13000-0x00007FFACED15000-memory.dmp

Filesize
8KB

Download
memory/4800-58-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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