xworm | 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

General

Target

mygame.exe
Size

137KB
MD5

1a925fce50787a5028b73dd32e0c7dce
SHA1

7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA256

00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
SHA512

ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP

3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

147.185.221.23:48450

Mutex

2YsFPOHVMLfmF9px

Attributes

Install_directory
%AppData%
install_file
Update.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral2/memory/1956-1-0x0000000000D50000-0x0000000000D78000-memory.dmp	family_xworm
behavioral2/files/0x000b000000019433-33.dat	family_xworm
behavioral2/memory/2896-35-0x00000000003F0000-0x0000000000418000-memory.dmp	family_xworm
behavioral2/memory/2056-40-0x0000000001220000-0x0000000001248000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2608	powershell.exe
1936	powershell.exe
2192	powershell.exe
2856	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
2896	Update.exe
2056	Update.exe
2816	Update.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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	mygame.exe

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
1052	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1936	powershell.exe
2192	powershell.exe
2856	powershell.exe
2608	powershell.exe
1956	mygame.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1956	mygame.exe
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeDebugPrivilege	2192	powershell.exe
Token: SeDebugPrivilege	2856	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	1956	mygame.exe
Token: SeDebugPrivilege	2896	Update.exe
Token: SeDebugPrivilege	2056	Update.exe
Token: SeDebugPrivilege	2816	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1956	mygame.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1936	1956	mygame.exe	30
PID 1956 wrote to memory of 1936	1956	mygame.exe	30
PID 1956 wrote to memory of 1936	1956	mygame.exe	30
PID 1956 wrote to memory of 2192	1956	mygame.exe	32
PID 1956 wrote to memory of 2192	1956	mygame.exe	32
PID 1956 wrote to memory of 2192	1956	mygame.exe	32
PID 1956 wrote to memory of 2856	1956	mygame.exe	35
PID 1956 wrote to memory of 2856	1956	mygame.exe	35
PID 1956 wrote to memory of 2856	1956	mygame.exe	35
PID 1956 wrote to memory of 2608	1956	mygame.exe	37
PID 1956 wrote to memory of 2608	1956	mygame.exe	37
PID 1956 wrote to memory of 2608	1956	mygame.exe	37
PID 1956 wrote to memory of 1052	1956	mygame.exe	39
PID 1956 wrote to memory of 1052	1956	mygame.exe	39
PID 1956 wrote to memory of 1052	1956	mygame.exe	39
PID 2572 wrote to memory of 2896	2572	taskeng.exe	42
PID 2572 wrote to memory of 2896	2572	taskeng.exe	42
PID 2572 wrote to memory of 2896	2572	taskeng.exe	42
PID 2572 wrote to memory of 2056	2572	taskeng.exe	44
PID 2572 wrote to memory of 2056	2572	taskeng.exe	44
PID 2572 wrote to memory of 2056	2572	taskeng.exe	44
PID 2572 wrote to memory of 2816	2572	taskeng.exe	45
PID 2572 wrote to memory of 2816	2572	taskeng.exe	45
PID 2572 wrote to memory of 2816	2572	taskeng.exe	45

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\mygame.exe
"C:\Users\Admin\AppData\Local\Temp\mygame.exe"
1⤵
- 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:1956
- 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\mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1936
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2192
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2608
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1052

C:\Windows\system32\taskeng.exe
taskeng.exe {E488A5F7-6852-4B19-97D5-E4761214A2B4} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2896
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2056
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2816

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

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
4a108ea30d8b862b43803b82f8743828

SHA1
d86c754e14f3e1f57f29b285c8324b95ddd8933e

SHA256
1cca2a3c015f285f2518703fc1fc843c333a2b5d65e22ac807641d7c2932a1e6

SHA512
fbb02ca9572da7e084fcca25bb21c6cd4aeb4a64159f790c3a4088d6a22ed4e372f8edc1986037560a2988def9b4a6201247f774418c4e5b8d06e438d8d21ce7

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

Filesize
137KB

MD5
1a925fce50787a5028b73dd32e0c7dce

SHA1
7205d5c3d7efbc5805eb0b343a1bc83903e7589c

SHA256
00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

SHA512
ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8

Download Submit
memory/1936-6-0x0000000002BD0000-0x0000000002C50000-memory.dmp

Filesize
512KB

Download
memory/1936-7-0x000000001B530000-0x000000001B812000-memory.dmp

Filesize
2.9MB

Download
memory/1936-8-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download
memory/1956-31-0x000000001B420000-0x000000001B4A0000-memory.dmp

Filesize
512KB

Download
memory/1956-0-0x000007FEF5DC3000-0x000007FEF5DC4000-memory.dmp

Filesize
4KB

Download
memory/1956-1-0x0000000000D50000-0x0000000000D78000-memory.dmp

Filesize
160KB

Download
memory/1956-36-0x000007FEF5DC3000-0x000007FEF5DC4000-memory.dmp

Filesize
4KB

Download
memory/1956-37-0x000000001B420000-0x000000001B4A0000-memory.dmp

Filesize
512KB

Download
memory/2056-40-0x0000000001220000-0x0000000001248000-memory.dmp

Filesize
160KB

Download
memory/2192-15-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/2192-14-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2896-35-0x00000000003F0000-0x0000000000418000-memory.dmp

Filesize
160KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads