xworm | ef5cb311599cd04871fa56f516e56af8da03d605013367021d99e1af0db876f1 | Triage

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05/04/2024, 05:33

Sharing

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General

Target

XClient.exe
Size

41KB
MD5

4a85a8fd8d30e43227a2eeafb180b649
SHA1

89c5f32f587eaf749c6b8fc4eaaf890bc0ff6928
SHA256

ef5cb311599cd04871fa56f516e56af8da03d605013367021d99e1af0db876f1
SHA512

1a48b86c97ad617839169601cb149b7d823ebfe07b59537c46934a57cb74e067ee36f1365f8dd568364b8fd6c899eecb1023fcaeb4f38715a1e17dda9a8906a7
SSDEEP

768:nNreDweeLOoHdSgDder3XvggggQLJF5PG9pmOH6vOwhp3Euzl:n4DweQldSgDIjXvvggCFI9A46vOwLNp

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

maximum-meet.gl.at.ply.gg:1675

Mutex

9LQBHUPAUEJEhUPH

Attributes

Install_directory
%Temp%
install_file
blacked.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral3/memory/3612-0-0x0000000000F70000-0x0000000000F80000-memory.dmp	family_xworm
behavioral3/files/0x000e000000023135-70.dat	family_xworm

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

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
392	blacked.exe
2268	blacked.exe

Adds Run key to start application 2 TTPs 1 IoCs

Registry Run Keys / Startup Folder

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\blacked = "C:\\Users\\Admin\\AppData\\Local\\Temp\\blacked.exe"	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.

flow	ioc
13	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.

Scheduled Task/Job

pid	Process
1148	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4704	powershell.exe
4704	powershell.exe
4208	powershell.exe
4208	powershell.exe
3136	powershell.exe
3136	powershell.exe
2404	powershell.exe
2404	powershell.exe
3612	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3612	XClient.exe
Token: SeDebugPrivilege	4704	powershell.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeDebugPrivilege	3136	powershell.exe
Token: SeDebugPrivilege	2404	powershell.exe
Token: SeDebugPrivilege	3612	XClient.exe
Token: SeDebugPrivilege	392	blacked.exe
Token: SeDebugPrivilege	2268	blacked.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3612	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3612 wrote to memory of 4704	3612	XClient.exe	92
PID 3612 wrote to memory of 4704	3612	XClient.exe	92
PID 3612 wrote to memory of 4208	3612	XClient.exe	94
PID 3612 wrote to memory of 4208	3612	XClient.exe	94
PID 3612 wrote to memory of 3136	3612	XClient.exe	96
PID 3612 wrote to memory of 3136	3612	XClient.exe	96
PID 3612 wrote to memory of 2404	3612	XClient.exe	98
PID 3612 wrote to memory of 2404	3612	XClient.exe	98
PID 3612 wrote to memory of 1148	3612	XClient.exe	101
PID 3612 wrote to memory of 1148	3612	XClient.exe	101

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\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- 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:3612
- 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\XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4704
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4208
- 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\blacked.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3136
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'blacked.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2404
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "blacked" /tr "C:\Users\Admin\AppData\Local\Temp\blacked.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1148

C:\Users\Admin\AppData\Local\Temp\blacked.exe
C:\Users\Admin\AppData\Local\Temp\blacked.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:392

C:\Users\Admin\AppData\Local\Temp\blacked.exe
C:\Users\Admin\AppData\Local\Temp\blacked.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2268

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
59d97011e091004eaffb9816aa0b9abd

SHA1
1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

SHA256
18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

SHA512
d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_szylwdhx.puq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\blacked.exe

Filesize
41KB

MD5
4a85a8fd8d30e43227a2eeafb180b649

SHA1
89c5f32f587eaf749c6b8fc4eaaf890bc0ff6928

SHA256
ef5cb311599cd04871fa56f516e56af8da03d605013367021d99e1af0db876f1

SHA512
1a48b86c97ad617839169601cb149b7d823ebfe07b59537c46934a57cb74e067ee36f1365f8dd568364b8fd6c899eecb1023fcaeb4f38715a1e17dda9a8906a7

Download Submit
memory/392-74-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/392-72-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/2268-77-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/2268-78-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/2404-59-0x0000020D7E4D0000-0x0000020D7E4E0000-memory.dmp

Filesize
64KB

Download
memory/2404-54-0x0000020D7E4D0000-0x0000020D7E4E0000-memory.dmp

Filesize
64KB

Download
memory/2404-63-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/2404-48-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/3136-44-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/3136-47-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/3612-2-0x0000000001850000-0x0000000001860000-memory.dmp

Filesize
64KB

Download
memory/3612-0-0x0000000000F70000-0x0000000000F80000-memory.dmp

Filesize
64KB

Download
memory/3612-68-0x0000000001850000-0x0000000001860000-memory.dmp

Filesize
64KB

Download
memory/3612-1-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/3612-61-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/4208-34-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/4208-32-0x000001E3C00C0000-0x000001E3C00D0000-memory.dmp

Filesize
64KB

Download
memory/4208-31-0x000001E3C00C0000-0x000001E3C00D0000-memory.dmp

Filesize
64KB

Download
memory/4208-30-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/4704-18-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download
memory/4704-15-0x000002518F550000-0x000002518F560000-memory.dmp

Filesize
64KB

Download
memory/4704-14-0x000002518F550000-0x000002518F560000-memory.dmp

Filesize
64KB

Download
memory/4704-5-0x00000251A8440000-0x00000251A8462000-memory.dmp

Filesize
136KB

Download
memory/4704-13-0x00007FF880C80000-0x00007FF881741000-memory.dmp

Filesize
10.8MB

Download