xworm | ff7efaae950c46e62c7c47a36c2678d1411acf80b92dec3be5c5fe53c6f74874

General

Target

X4346Client.exe
Size

324KB
MD5

69a723ed4cebb6e779ab62ab7bab37d3
SHA1

9e8f497fcf03dbd293c518557f6f503015c62276
SHA256

ff7efaae950c46e62c7c47a36c2678d1411acf80b92dec3be5c5fe53c6f74874
SHA512

084b89f8318a85642917982d661530ac7c67d45ed48725e52040d7ce204025f1099688985fb34e65844d4deda0db6e62b01f46cfe486f9587a231559e14210b8
SSDEEP

6144:Sjyrvh/bjV/5iZcBCqYg9HF0VRlQCvcL8qz00AGiULo+vRZ7qm+DJrOHMy:SjyxVB0g9l0VRlQD7zqGi0RZ1+DwHM

Score

10^/10

xworm rat trojan

Malware Config

Extracted

Family

xworm

C2

primary-sections.gl.at.ply.gg:22675

Attributes

Install_directory
%Temp%
install_file
dllhostPDF.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4644-0-0x00000000009E0000-0x0000000000A38000-memory.dmp	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

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation	X4346Client.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhostPDF.lnk	X4346Client.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\dllhostPDF.lnk	X4346Client.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

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4328	powershell.exe
4328	powershell.exe
4744	powershell.exe
4744	powershell.exe
2624	powershell.exe
2624	powershell.exe
376	powershell.exe
376	powershell.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4644	X4346Client.exe
Token: SeDebugPrivilege	4328	powershell.exe
Token: SeDebugPrivilege	4744	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	376	powershell.exe
Token: SeDebugPrivilege	4644	X4346Client.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4644 wrote to memory of 4328	4644	X4346Client.exe	92
PID 4644 wrote to memory of 4328	4644	X4346Client.exe	92
PID 4644 wrote to memory of 4744	4644	X4346Client.exe	95
PID 4644 wrote to memory of 4744	4644	X4346Client.exe	95
PID 4644 wrote to memory of 2624	4644	X4346Client.exe	97
PID 4644 wrote to memory of 2624	4644	X4346Client.exe	97
PID 4644 wrote to memory of 376	4644	X4346Client.exe	99
PID 4644 wrote to memory of 376	4644	X4346Client.exe	99

C:\Users\Admin\AppData\Local\Temp\X4346Client.exe
"C:\Users\Admin\AppData\Local\Temp\X4346Client.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4644
- 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\X4346Client.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4328
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'X4346Client.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4744
- 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\dllhostPDF.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'dllhostPDF.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Replay Monitor

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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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
944B

MD5
ab24765a7393bd3cef8acbf0a617fba2

SHA1
ef2c12a457a11f6204344afed09a39f4d3e803cb

SHA256
3a03c7efabe880ae9f283b1cf373d3f09d07ab619028319b3599b643ae140d47

SHA512
e16306674a8c89f54467d7fba3857e1e0bdf3729f5de9f4451520cfbddfa535c4d653dde6efcac38efd693e9b3e4965fcd08c559e720c372feca65050b46e355

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

Filesize
944B

MD5
e60eb305a7b2d9907488068b7065abd3

SHA1
1643dd7f915ac50c75bc01c53d68c5dafb9ce28d

SHA256
ad07460e061642c0dd4e7dfa7b821aacce873e290389e72f708e9f3504f9d135

SHA512
95c45afec6fa4e0b2a21edd10a6b2dc30568810c67bc9bc34d98ab111c48261f377a370583adb27e08616b0108026c119493b1b093b52ce931117e646b46cb7b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4i40hbsb.h21.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/376-62-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/376-50-0x000002022A230000-0x000002022A240000-memory.dmp

Filesize
64KB

Download
memory/376-49-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/2624-48-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/2624-35-0x00000226730B0000-0x00000226730C0000-memory.dmp

Filesize
64KB

Download
memory/2624-34-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/2624-36-0x00000226730B0000-0x00000226730C0000-memory.dmp

Filesize
64KB

Download
memory/4328-7-0x00000196AE3D0000-0x00000196AE3F2000-memory.dmp

Filesize
136KB

Download
memory/4328-13-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/4328-17-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/4328-14-0x00000196AE420000-0x00000196AE430000-memory.dmp

Filesize
64KB

Download
memory/4644-2-0x0000000002B60000-0x0000000002B70000-memory.dmp

Filesize
64KB

Download
memory/4644-0-0x00000000009E0000-0x0000000000A38000-memory.dmp

Filesize
352KB

Download
memory/4644-1-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/4644-67-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/4644-68-0x0000000002B60000-0x0000000002B70000-memory.dmp

Filesize
64KB

Download
memory/4744-33-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download
memory/4744-30-0x00000184A7060000-0x00000184A7070000-memory.dmp

Filesize
64KB

Download
memory/4744-25-0x00000184A7060000-0x00000184A7070000-memory.dmp

Filesize
64KB

Download
memory/4744-24-0x00007FFF6E670000-0x00007FFF6F131000-memory.dmp

Filesize
10.8MB

Download

Analysis

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