xworm | 68a3a8d3147a285c2b76e64cbb0a3bb4803aa35a35ff9fb964512ba0cec68743

General

Target

Solara.exe
Size

44KB
MD5

122fbe0d84957e8e5fa9385c12da3d0f
SHA1

ff9729798bca408c4cdbf4f44a2a25b95a7fc163
SHA256

68a3a8d3147a285c2b76e64cbb0a3bb4803aa35a35ff9fb964512ba0cec68743
SHA512

9ef2f06d78d5722e61ef55ceea2e19c4b12b7c0c0e95097b90ff6d98e5d2208921742fb4c31af816d20366de087775d0eb67de7b9c532f29eff54e43690672a5
SSDEEP

768:GNTRmetisWt2tKdouL3ZE9R9yFRPG9Xb6OOChLsGO6Mi5:GNTketz8npE92Fw9Xb6OOCVVO9i5

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

6vmX68wzVkGMx0vS

Attributes

Install_directory
%AppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/FgmKAhUD

aes.plain

Signatures

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/3060-1-0x0000000000990000-0x00000000009A2000-memory.dmp	family_xworm
behavioral1/memory/1852-36-0x0000000001080000-0x0000000001092000-memory.dmp	family_xworm
behavioral1/files/0x000c000000015d8c-35.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
2348	powershell.exe
1928	powershell.exe
2940	powershell.exe
2872	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1852	svchost
912	svchost

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-1-5-21-677481364-2238709445-1347953534-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost"	Solara.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.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
2692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2348	powershell.exe
1928	powershell.exe
2940	powershell.exe
2872	powershell.exe
3060	Solara.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	3060	Solara.exe
Token: SeDebugPrivilege	2348	powershell.exe
Token: SeDebugPrivilege	1928	powershell.exe
Token: SeDebugPrivilege	2940	powershell.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	3060	Solara.exe
Token: SeDebugPrivilege	1852	svchost
Token: SeDebugPrivilege	912	svchost

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3060	Solara.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 2348	3060	Solara.exe	30
PID 3060 wrote to memory of 2348	3060	Solara.exe	30
PID 3060 wrote to memory of 2348	3060	Solara.exe	30
PID 3060 wrote to memory of 1928	3060	Solara.exe	32
PID 3060 wrote to memory of 1928	3060	Solara.exe	32
PID 3060 wrote to memory of 1928	3060	Solara.exe	32
PID 3060 wrote to memory of 2940	3060	Solara.exe	34
PID 3060 wrote to memory of 2940	3060	Solara.exe	34
PID 3060 wrote to memory of 2940	3060	Solara.exe	34
PID 3060 wrote to memory of 2872	3060	Solara.exe	36
PID 3060 wrote to memory of 2872	3060	Solara.exe	36
PID 3060 wrote to memory of 2872	3060	Solara.exe	36
PID 3060 wrote to memory of 2692	3060	Solara.exe	39
PID 3060 wrote to memory of 2692	3060	Solara.exe	39
PID 3060 wrote to memory of 2692	3060	Solara.exe	39
PID 2580 wrote to memory of 1852	2580	taskeng.exe	42
PID 2580 wrote to memory of 1852	2580	taskeng.exe	42
PID 2580 wrote to memory of 1852	2580	taskeng.exe	42
PID 2580 wrote to memory of 912	2580	taskeng.exe	43
PID 2580 wrote to memory of 912	2580	taskeng.exe	43
PID 2580 wrote to memory of 912	2580	taskeng.exe	43

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\Solara.exe
"C:\Users\Admin\AppData\Local\Temp\Solara.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:3060
- 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\Solara.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2348
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Solara.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1928
- 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\svchost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2692

C:\Windows\system32\taskeng.exe
taskeng.exe {26292DEA-DDCB-4A40-A481-E9933847FABA} S-1-5-21-677481364-2238709445-1347953534-1000:JXXXDSWS\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2580
- C:\Users\Admin\AppData\Roaming\svchost
  C:\Users\Admin\AppData\Roaming\svchost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1852
- C:\Users\Admin\AppData\Roaming\svchost
  C:\Users\Admin\AppData\Roaming\svchost
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:912

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
8b05b6c128dd4fbd1ed469887765a566

SHA1
8f1e60ebffdfce849a251adbf2af6b9d39570808

SHA256
d37cf3f1be16b09cb10b300b15b05c2e5a6ef05558ec3fba03b0559a3e29264d

SHA512
33577f6a1c356b92471405b5580f5cb2678dd15f0b6f8f0805c605909dfe7e22b1d456311c3eb20c5b5cd3724b117fb5188f57aead50d81685fbf7828668fde4

Download Submit
C:\Users\Admin\AppData\Roaming\svchost

Filesize
44KB

MD5
122fbe0d84957e8e5fa9385c12da3d0f

SHA1
ff9729798bca408c4cdbf4f44a2a25b95a7fc163

SHA256
68a3a8d3147a285c2b76e64cbb0a3bb4803aa35a35ff9fb964512ba0cec68743

SHA512
9ef2f06d78d5722e61ef55ceea2e19c4b12b7c0c0e95097b90ff6d98e5d2208921742fb4c31af816d20366de087775d0eb67de7b9c532f29eff54e43690672a5

Download Submit
memory/1852-36-0x0000000001080000-0x0000000001092000-memory.dmp

Filesize
72KB

Download
memory/1928-14-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/1928-15-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/2348-7-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/2348-8-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2348-6-0x00000000027F0000-0x0000000002870000-memory.dmp

Filesize
512KB

Download
memory/3060-0-0x000007FEF5D83000-0x000007FEF5D84000-memory.dmp

Filesize
4KB

Download
memory/3060-30-0x0000000002160000-0x00000000021E0000-memory.dmp

Filesize
512KB

Download
memory/3060-31-0x000007FEF5D83000-0x000007FEF5D84000-memory.dmp

Filesize
4KB

Download
memory/3060-32-0x0000000002160000-0x00000000021E0000-memory.dmp

Filesize
512KB

Download
memory/3060-1-0x0000000000990000-0x00000000009A2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads