xworm | cb51764f19e66bb6accd7f0418332bac7759073ed245f0633dddd53f68e81933

General

Target

msedge.exe
Size

204KB
MD5

4738e3496a3efe5f19c57b764eb5ba9b
SHA1

da9163944b1f51438b2602cbc95660af43172065
SHA256

cb51764f19e66bb6accd7f0418332bac7759073ed245f0633dddd53f68e81933
SHA512

4cb3029e136471edf2ebb46d1e4fc3a70e5138a5bd4b3fb182b6746d00c69fd5cf8822c0c90c2bcb4d8276db0cecac16ea0198e18a44e755a340495b19cc2238
SSDEEP

3072:LE9ZJhOb+68dbzP/b0GO1ItilKSRUGKXs+S++7KFSbxeY+qDDrMI:1q68dbD/b0mtilKDGqStKEbxI

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

45.84.199.152:7000

Attributes

Install_directory
%Public%
install_file
Msedge.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3928-1-0x0000000000700000-0x0000000000738000-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
2288	powershell.exe
1044	powershell.exe
4656	powershell.exe
2364	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-1-5-21-2650514177-1034912467-4025611726-1000\Control Panel\International\Geo\Nation	msedge.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Msedge.lnk	msedge.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Msedge.lnk	msedge.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
23	ip-api.com

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1312	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2364	powershell.exe
2364	powershell.exe
2288	powershell.exe
2288	powershell.exe
1044	powershell.exe
1044	powershell.exe
4656	powershell.exe
4656	powershell.exe
3928	msedge.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3928	msedge.exe
Token: SeDebugPrivilege	2364	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeDebugPrivilege	1044	powershell.exe
Token: SeDebugPrivilege	4656	powershell.exe
Token: SeDebugPrivilege	3928	msedge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3928	msedge.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 2364	3928	msedge.exe	90
PID 3928 wrote to memory of 2364	3928	msedge.exe	90
PID 3928 wrote to memory of 2288	3928	msedge.exe	93
PID 3928 wrote to memory of 2288	3928	msedge.exe	93
PID 3928 wrote to memory of 1044	3928	msedge.exe	95
PID 3928 wrote to memory of 1044	3928	msedge.exe	95
PID 3928 wrote to memory of 4656	3928	msedge.exe	97
PID 3928 wrote to memory of 4656	3928	msedge.exe	97
PID 3928 wrote to memory of 1312	3928	msedge.exe	100
PID 3928 wrote to memory of 1312	3928	msedge.exe	100

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\msedge.exe
"C:\Users\Admin\AppData\Local\Temp\msedge.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:3928
- 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\msedge.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2364
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'msedge.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2288
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\Msedge.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1044
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Msedge.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4656
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Msedge" /tr "C:\Users\Public\Msedge.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1312

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2

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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
79790fe698900728cb1c01dc3b2b64b3

SHA1
f2331bc17a15dc9289d8a86185c6da1a8902e98f

SHA256
7bdd411e2525492d856bab0722c158e40a9aa2bafd18bf14e585e03d3c6a6931

SHA512
dace2648b08e206a406c542bd5f2510c3c803feaab1255e62f9e415d36350befc53829782507484bedb76d583a1552659f3a74a5336a4001061ae43d470d4147

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

Filesize
944B

MD5
b4b6d4cc52b5a3a71149b1f33d94d5de

SHA1
97d3dbdd24919eab70e3b14c68797cefc07e90dd

SHA256
da8c02ce00d5b1e6d4c3667465c7bbc14d7cd5227eb634f3d9690afd488267fe

SHA512
fc894f03709b83df7d2fca2779e1e60549078b67bcdbff0b61c8e5a802982210ae971309c1f92577573299288963ab5c95c6b38cbaedf53dc6062812c57a97af

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pm3lfe5v.14f.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2288-32-0x000001F2DF020000-0x000001F2DF23C000-memory.dmp

Filesize
2.1MB

Download
memory/2364-14-0x00007FFBF7110000-0x00007FFBF7BD1000-memory.dmp

Filesize
10.8MB

Download
memory/2364-15-0x00007FFBF7110000-0x00007FFBF7BD1000-memory.dmp

Filesize
10.8MB

Download
memory/2364-18-0x00000285A44B0000-0x00000285A46CC000-memory.dmp

Filesize
2.1MB

Download
memory/2364-19-0x00007FFBF7110000-0x00007FFBF7BD1000-memory.dmp

Filesize
10.8MB

Download
memory/2364-9-0x000002858BCD0000-0x000002858BCF2000-memory.dmp

Filesize
136KB

Download
memory/2364-3-0x00007FFBF7110000-0x00007FFBF7BD1000-memory.dmp

Filesize
10.8MB

Download
memory/3928-0-0x00007FFBF7113000-0x00007FFBF7115000-memory.dmp

Filesize
8KB

Download
memory/3928-2-0x00007FFBF7110000-0x00007FFBF7BD1000-memory.dmp

Filesize
10.8MB

Download
memory/3928-1-0x0000000000700000-0x0000000000738000-memory.dmp

Filesize
224KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads