xworm | 14d861ab3f84d09ad5b4fe1936b1a363ac513416bbf5f561cc274b7238bf063b

General

Target

uhhhhh.exe
Size

67KB
MD5

3083acc11f7831e5dd4d17f57629e0e8
SHA1

5f8a1bc143cb1358033050ec3bae36ae7b8ca051
SHA256

14d861ab3f84d09ad5b4fe1936b1a363ac513416bbf5f561cc274b7238bf063b
SHA512

6042d29e295d0fe52d3213a0f8efb11163ab03afe4e272cb437e6f543a2e7e58679d6950ef8a79fd4b1d1b94ff3d73467b4ba623560d5af27e7d69d41994176b
SSDEEP

1536:P3YtrX8iPmi24ysDbA+JcgKID1REW6cOl9jyS:P3GPmpRsDbFc0D7ROPmS

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

country-dealer.gl.at.ply.gg:19923

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/1484-1-0x00000000002D0000-0x00000000002E8000-memory.dmp	family_xworm
behavioral2/files/0x000a000000023c77-60.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
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
5048	powershell.exe
1780	powershell.exe
4976	powershell.exe
3120	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-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	uhhhhh.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4360	XClient.exe
2820	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	uhhhhh.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
8	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
4236	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
5048	powershell.exe
5048	powershell.exe
1780	powershell.exe
1780	powershell.exe
4976	powershell.exe
4976	powershell.exe
3120	powershell.exe
3120	powershell.exe
1484	uhhhhh.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	1484	uhhhhh.exe
Token: SeDebugPrivilege	5048	powershell.exe
Token: SeDebugPrivilege	1780	powershell.exe
Token: SeDebugPrivilege	4976	powershell.exe
Token: SeDebugPrivilege	3120	powershell.exe
Token: SeDebugPrivilege	1484	uhhhhh.exe
Token: SeDebugPrivilege	4360	XClient.exe
Token: SeDebugPrivilege	2820	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1484	uhhhhh.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1484 wrote to memory of 5048	1484	uhhhhh.exe	87
PID 1484 wrote to memory of 5048	1484	uhhhhh.exe	87
PID 1484 wrote to memory of 1780	1484	uhhhhh.exe	89
PID 1484 wrote to memory of 1780	1484	uhhhhh.exe	89
PID 1484 wrote to memory of 4976	1484	uhhhhh.exe	91
PID 1484 wrote to memory of 4976	1484	uhhhhh.exe	91
PID 1484 wrote to memory of 3120	1484	uhhhhh.exe	93
PID 1484 wrote to memory of 3120	1484	uhhhhh.exe	93
PID 1484 wrote to memory of 4236	1484	uhhhhh.exe	97
PID 1484 wrote to memory of 4236	1484	uhhhhh.exe	97

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\uhhhhh.exe
"C:\Users\Admin\AppData\Local\Temp\uhhhhh.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:1484
- 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\uhhhhh.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5048
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'uhhhhh.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1780
- 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\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4976
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3120
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4236

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4360

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2820

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

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

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\XClient.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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
a9a7f35c006bbf5da72f9cb250ffbddb

SHA1
458a8cedc38dac109631d9fccb3bf6d2c5c0e89e

SHA256
a1db56d56e35a6c95f98204e40f69f70422969681d408e5edc4afbf732eef86b

SHA512
d341773d30e09214567c65f24cd1854f1e438b8528aa30d35b6baac16e671dde1245edda654f19343b7c160da45985ab53f08453e7f6286e272d544f8741c131

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

Filesize
944B

MD5
83685d101174171875b4a603a6c2a35c

SHA1
37be24f7c4525e17fa18dbd004186be3a9209017

SHA256
0c557845aab1da497bbff0e8fbe65cabf4cb2804b97ba8ae8c695a528af70870

SHA512
005a97a8e07b1840abdcef86a7881fd9bdc8acbfdf3eafe1dceb6374060626d81d789e57d87ca4096a39e28d5cca00f8945edff0a747591691ae75873d2b3fb5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5xnwp4jd.b2c.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
67KB

MD5
3083acc11f7831e5dd4d17f57629e0e8

SHA1
5f8a1bc143cb1358033050ec3bae36ae7b8ca051

SHA256
14d861ab3f84d09ad5b4fe1936b1a363ac513416bbf5f561cc274b7238bf063b

SHA512
6042d29e295d0fe52d3213a0f8efb11163ab03afe4e272cb437e6f543a2e7e58679d6950ef8a79fd4b1d1b94ff3d73467b4ba623560d5af27e7d69d41994176b

Download Submit
memory/1484-1-0x00000000002D0000-0x00000000002E8000-memory.dmp

Filesize
96KB

Download
memory/1484-2-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/1484-0-0x00007FFA96DC3000-0x00007FFA96DC5000-memory.dmp

Filesize
8KB

Download
memory/1484-58-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/1484-54-0x00007FFA96DC3000-0x00007FFA96DC5000-memory.dmp

Filesize
8KB

Download
memory/5048-4-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/5048-18-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/5048-11-0x0000016435C60000-0x0000016435C82000-memory.dmp

Filesize
136KB

Download
memory/5048-5-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download
memory/5048-3-0x00007FFA96DC0000-0x00007FFA97881000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads