xworm | 75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37

General

Target

75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe
Size

76KB
MD5

8ea7c04dee64589a677106754336c3e1
SHA1

ef3a5793936341c92d6c8cfe7018e3b5a0bd6c40
SHA256

75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37
SHA512

fe92ea85ba4aa83d23a94176e4286636bbd28958691360a0e6e412063d2be1cc1392afd65deb385f53d6f563c92d4cabbeee404849b71d12b3670d3126f64501
SSDEEP

1536:HDFHYoyuZiZbEKXDKbYy6Kdo/QJFnHMbE6xFr0FO5jidfp:HDyoFuoKObVZWQFnmYO5jgp

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

20.ip.gl.ply.gg:55257

Attributes

Install_directory
%AppData%
install_file
SolaraBootstrapper.exe

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/2532-1-0x0000000001080000-0x000000000109A000-memory.dmp	family_xworm
behavioral1/files/0x000e000000012254-35.dat	family_xworm
behavioral1/memory/2336-37-0x0000000000A60000-0x0000000000A7A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2752	powershell.exe
2992	powershell.exe
2904	powershell.exe
2680	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SolaraBootstrapper.lnk	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SolaraBootstrapper.lnk	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe

Executes dropped EXE 2 IoCs

pid	Process
2336	SolaraBootstrapper.exe
816	SolaraBootstrapper.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\SolaraBootstrapper = "C:\\Users\\Admin\\AppData\\Roaming\\SolaraBootstrapper.exe"	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.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
4	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
640	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2752	powershell.exe
2992	powershell.exe
2904	powershell.exe
2680	powershell.exe
2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2992	powershell.exe
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe
Token: SeDebugPrivilege	2336	SolaraBootstrapper.exe
Token: SeDebugPrivilege	816	SolaraBootstrapper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2752	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	31
PID 2532 wrote to memory of 2752	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	31
PID 2532 wrote to memory of 2752	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	31
PID 2532 wrote to memory of 2992	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	33
PID 2532 wrote to memory of 2992	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	33
PID 2532 wrote to memory of 2992	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	33
PID 2532 wrote to memory of 2904	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	35
PID 2532 wrote to memory of 2904	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	35
PID 2532 wrote to memory of 2904	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	35
PID 2532 wrote to memory of 2680	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	37
PID 2532 wrote to memory of 2680	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	37
PID 2532 wrote to memory of 2680	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	37
PID 2532 wrote to memory of 640	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	39
PID 2532 wrote to memory of 640	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	39
PID 2532 wrote to memory of 640	2532	75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe	39
PID 2796 wrote to memory of 2336	2796	taskeng.exe	43
PID 2796 wrote to memory of 2336	2796	taskeng.exe	43
PID 2796 wrote to memory of 2336	2796	taskeng.exe	43
PID 2796 wrote to memory of 816	2796	taskeng.exe	44
PID 2796 wrote to memory of 816	2796	taskeng.exe	44
PID 2796 wrote to memory of 816	2796	taskeng.exe	44

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\75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe
"C:\Users\Admin\AppData\Local\Temp\75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.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:2532
- 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\75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2992
- 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\SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2904
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SolaraBootstrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2680
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SolaraBootstrapper" /tr "C:\Users\Admin\AppData\Roaming\SolaraBootstrapper.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:640

C:\Windows\system32\taskeng.exe
taskeng.exe {BF948901-67A8-4E83-A88D-A1B5309F8675} S-1-5-21-312935884-697965778-3955649944-1000:MXQFNXLT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2796
- C:\Users\Admin\AppData\Roaming\SolaraBootstrapper.exe
  C:\Users\Admin\AppData\Roaming\SolaraBootstrapper.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2336
- C:\Users\Admin\AppData\Roaming\SolaraBootstrapper.exe
  C:\Users\Admin\AppData\Roaming\SolaraBootstrapper.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:816

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
be46704b6c8306ff2ec38a636d8dcce7

SHA1
826eb53bd8512a04f9999b7788c9f51289c7a7e7

SHA256
7b1b59c910dd95206896a242c045d1458aa2f04b3165b7469aaeb6561d1cdb35

SHA512
4d2d2551cd020b5743e0a320316c4b2c8a2d2924e24d8cf2c44be4893096bf06318985fb3f97fdfea5f3e9a3998213dc1013b210f3e158e1183682299da5d075

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

Filesize
76KB

MD5
8ea7c04dee64589a677106754336c3e1

SHA1
ef3a5793936341c92d6c8cfe7018e3b5a0bd6c40

SHA256
75b1d628fbd841131a382492e3648afd69bbd229fda77a81a8f58f74d89c7b37

SHA512
fe92ea85ba4aa83d23a94176e4286636bbd28958691360a0e6e412063d2be1cc1392afd65deb385f53d6f563c92d4cabbeee404849b71d12b3670d3126f64501

Download Submit
memory/2336-37-0x0000000000A60000-0x0000000000A7A000-memory.dmp

Filesize
104KB

Download
memory/2532-1-0x0000000001080000-0x000000000109A000-memory.dmp

Filesize
104KB

Download
memory/2532-2-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2532-7-0x000007FEF5E13000-0x000007FEF5E14000-memory.dmp

Filesize
4KB

Download
memory/2532-0-0x000007FEF5E13000-0x000007FEF5E14000-memory.dmp

Filesize
4KB

Download
memory/2532-33-0x000007FEF5E10000-0x000007FEF67FC000-memory.dmp

Filesize
9.9MB

Download
memory/2752-10-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2752-9-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2752-8-0x0000000002DA0000-0x0000000002E20000-memory.dmp

Filesize
512KB

Download
memory/2992-17-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2992-16-0x000000001B4E0000-0x000000001B7C2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads