xworm | d2347ef2b7dcc437febfc6d5716072dcd9faeda6afaf70f4795454c3da6d1240

General

Target

Solara.exe
Size

39KB
MD5

6857da68ff8f6f4d2a5ccf084a986cd8
SHA1

c77e9eb10f80f0af86e5b1fb58e383fcb7c9127b
SHA256

d2347ef2b7dcc437febfc6d5716072dcd9faeda6afaf70f4795454c3da6d1240
SHA512

3aca870813c74669ed358e39272136279f48f04c101617653c4309055b97d958e792df0dfdaa34f82f6552fa73a8705e7750c93ad5f8965956851e6878ab989c
SSDEEP

768:t4SnFmvYC9ehSPthRctwzoFd9waOphwjtYir:tT5gehSjOFd9waOpYhr

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

ijf3Un99PlWRIuIV

Attributes

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

aes.plain

Signatures

Detect Xworm Payload 5 IoCs

resource	yara_rule
behavioral1/memory/1712-1-0x00000000010D0000-0x00000000010E0000-memory.dmp	family_xworm
behavioral1/files/0x00080000000120fd-9.dat	family_xworm
behavioral1/memory/2764-11-0x0000000000070000-0x0000000000080000-memory.dmp	family_xworm
behavioral1/memory/2636-15-0x00000000001D0000-0x00000000001E0000-memory.dmp	family_xworm
behavioral1/memory/1052-17-0x00000000002A0000-0x00000000002B0000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

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 3 IoCs

pid	Process
2764	svchost.exe
2636	svchost.exe
1052	svchost.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	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
3008	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	Solara.exe
Token: SeDebugPrivilege	2764	svchost.exe
Token: SeDebugPrivilege	2636	svchost.exe
Token: SeDebugPrivilege	1052	svchost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 3008	1712	Solara.exe	29
PID 1712 wrote to memory of 3008	1712	Solara.exe	29
PID 1712 wrote to memory of 3008	1712	Solara.exe	29
PID 2816 wrote to memory of 2764	2816	taskeng.exe	32
PID 2816 wrote to memory of 2764	2816	taskeng.exe	32
PID 2816 wrote to memory of 2764	2816	taskeng.exe	32
PID 2816 wrote to memory of 2636	2816	taskeng.exe	33
PID 2816 wrote to memory of 2636	2816	taskeng.exe	33
PID 2816 wrote to memory of 2636	2816	taskeng.exe	33
PID 2816 wrote to memory of 1052	2816	taskeng.exe	34
PID 2816 wrote to memory of 1052	2816	taskeng.exe	34
PID 2816 wrote to memory of 1052	2816	taskeng.exe	34

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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1712
- 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.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3008

C:\Windows\system32\taskeng.exe
taskeng.exe {BABFA9A9-572C-4597-8A47-C70E77F87857} S-1-5-21-2703099537-420551529-3771253338-1000:XECUDNCD\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2636
- C:\Users\Admin\AppData\Roaming\svchost.exe
  C:\Users\Admin\AppData\Roaming\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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\svchost.exe

Filesize
39KB

MD5
6857da68ff8f6f4d2a5ccf084a986cd8

SHA1
c77e9eb10f80f0af86e5b1fb58e383fcb7c9127b

SHA256
d2347ef2b7dcc437febfc6d5716072dcd9faeda6afaf70f4795454c3da6d1240

SHA512
3aca870813c74669ed358e39272136279f48f04c101617653c4309055b97d958e792df0dfdaa34f82f6552fa73a8705e7750c93ad5f8965956851e6878ab989c

Download Submit
memory/1052-17-0x00000000002A0000-0x00000000002B0000-memory.dmp

Filesize
64KB

Download
memory/1712-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/1712-1-0x00000000010D0000-0x00000000010E0000-memory.dmp

Filesize
64KB

Download
memory/1712-6-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/1712-7-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

Filesize
4KB

Download
memory/1712-12-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

Filesize
9.9MB

Download
memory/2636-15-0x00000000001D0000-0x00000000001E0000-memory.dmp

Filesize
64KB

Download
memory/2764-11-0x0000000000070000-0x0000000000080000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads