xworm | 5d27d172d7910c67b668b31ed29826e973f1a78fb217b0dd4f40dcafe86bb6a2

General

Target

XClient.sfx.exe
Size

427KB
MD5

5435de027987f5f1f608719b0c8a752b
SHA1

b341e00d0bce1b8e085aaa7880c1e130bb6b3976
SHA256

5d27d172d7910c67b668b31ed29826e973f1a78fb217b0dd4f40dcafe86bb6a2
SHA512

fa75b2b27a2f1696b6dfac5fc6944f2501200eae3daaa449db3721d34c185435e82cf7c900b5f4c477185c5c9a410290e2ba9c93f7375e6810e90e61651d5d87
SSDEEP

6144:x5aMJNLwL73PZPkFr1jilzqqVWk6855JKSFtIooEbQYT+t1PNmSiqqvCr:xOxPkPjQeqQ1Y53KRYT+t1PABqv

Score

10^/10

Malware Config

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000d000000023b8c-4.dat	family_xworm
behavioral2/memory/3000-13-0x0000000000510000-0x000000000052A000-memory.dmp	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 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2096	powershell.exe
452	powershell.exe
2232	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	XClient.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	XClient.sfx.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
3000	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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Local\\XClient.exe"	XClient.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3820	timeout.exe

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
3016	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2096	powershell.exe
2096	powershell.exe
452	powershell.exe
452	powershell.exe
2232	powershell.exe
2232	powershell.exe
3000	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3000	XClient.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	452	powershell.exe
Token: SeDebugPrivilege	2232	powershell.exe
Token: SeDebugPrivilege	3000	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3000	XClient.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3960 wrote to memory of 3000	3960	XClient.sfx.exe	83
PID 3960 wrote to memory of 3000	3960	XClient.sfx.exe	83
PID 3000 wrote to memory of 2096	3000	XClient.exe	86
PID 3000 wrote to memory of 2096	3000	XClient.exe	86
PID 3000 wrote to memory of 452	3000	XClient.exe	88
PID 3000 wrote to memory of 452	3000	XClient.exe	88
PID 3000 wrote to memory of 2232	3000	XClient.exe	90
PID 3000 wrote to memory of 2232	3000	XClient.exe	90
PID 3000 wrote to memory of 3016	3000	XClient.exe	94
PID 3000 wrote to memory of 3016	3000	XClient.exe	94
PID 3000 wrote to memory of 4940	3000	XClient.exe	109
PID 3000 wrote to memory of 4940	3000	XClient.exe	109
PID 3000 wrote to memory of 3188	3000	XClient.exe	111
PID 3000 wrote to memory of 3188	3000	XClient.exe	111
PID 3188 wrote to memory of 3820	3188	cmd.exe	113
PID 3188 wrote to memory of 3820	3188	cmd.exe	113

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.sfx.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.sfx.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3960
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\XClient.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\XClient.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3000
- - 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\RarSFX0\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2096
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:452
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2232
- - 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\Local\XClient.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3016
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "XClient"
    3⤵
    PID:4940
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp606.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3188
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:3820

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\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
9b57902ba8287ea15038da415e6f0f01

SHA1
981d0ce5838ca2940c8cf128412ff56a35344587

SHA256
d4c911bc6521a4f84436dc95db7cf0be7942517a7af909e8e9531d10d9c4d84b

SHA512
fc80f90cecaf1cdc18edcc4c543e31b50169fcf34888b7b9767c08fe89949f0153a43b32c1223e432b59a4d7b3e73bcfa3adf569ab3fcc82f03a8ce925e2e070

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\XClient.exe

Filesize
80KB

MD5
bee4a56d9ba0426d3c95dde1970f6429

SHA1
2bfa99521d4a4f2ed6f9b457074ecf1fae7cd712

SHA256
d6684b27eb3b9913fd9742bf3ce9c38e5f089211b0c105893e44eeaf79f691a2

SHA512
294855ac413dec844467c23ddef1dd87334d0f83f5053a6e9e0b66f032d48e748351f4fa95e166d33c4385c4734d4f4af27365d3379d480a5b5a8ecb30e5f660

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_edom1wpc.wzb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp606.tmp.bat

Filesize
166B

MD5
2f8200fbbc8115fc565e570caf4ece70

SHA1
5dd05cf22ca368a74821cb04821a8dddee8e8c93

SHA256
bafa61a4b0858be23853131744b89d07b21b3212ddf8b938c92528d21e5dbdc5

SHA512
b98ee3710bd215d61cd56b643dc870f574f63d75b59a6b2af74c3316f58100e7906d7e0da2b083f711c8c990ff918b5c631dea95dfc9aad3334cfaae43c1dd11

Download Submit
memory/2096-19-0x000001A4A45E0000-0x000001A4A4602000-memory.dmp

Filesize
136KB

Download
memory/3000-13-0x0000000000510000-0x000000000052A000-memory.dmp

Filesize
104KB

Download
memory/3000-12-0x00007FFCD4273000-0x00007FFCD4275000-memory.dmp

Filesize
8KB

Download
memory/3000-57-0x00007FFCD4270000-0x00007FFCD4D31000-memory.dmp

Filesize
10.8MB

Download
memory/3000-58-0x00007FFCD4273000-0x00007FFCD4275000-memory.dmp

Filesize
8KB

Download
memory/3000-59-0x00007FFCD4270000-0x00007FFCD4D31000-memory.dmp

Filesize
10.8MB

Download
memory/3000-66-0x00007FFCD4270000-0x00007FFCD4D31000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads