xworm | 9df8c23f18ef49662420510fd26519f1d975f7ae217af46ca58343284090d28e

General

Target

Solara.exe
Size

53.0MB
MD5

44a04e5d735a5c6f0a8f8866867111ff
SHA1

c47f6cf5d11f51442f4e42534db4bee6b52ca2b6
SHA256

03194e16bdfc38e781ebbc7eea7b6273370d4991aa7a12bbf100ef53feefa7ee
SHA512

97ebde8201a839327e48618e2aad4098600c51b7a963943b2597875570cdd4e634b647dc800de8cbde9cbbe6ac63f01e04dbd0cd8df8ec275ecacd9c0173fb06
SSDEEP

1572864:oD0LQqMrlpA+Ql4Jd6xTivfSQqiu8VNmn:oOyklm6xenDOIgn

Score

10^/10

xworm discovery execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:18549

25.ip.gl.ply.gg:18549

cover-expanded.gl.at.ply.gg:18549

Attributes

Install_directory
%Userprofile%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000c000000023b35-4.dat	family_xworm
behavioral1/memory/4500-12-0x0000000000A10000-0x0000000000A28000-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
904	powershell.exe
3356	powershell.exe
2568	powershell.exe
2908	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	Solara.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	xcclienttt.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
4500	xcclienttt.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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svhost = "C:\\Users\\Admin\\svhost"	xcclienttt.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
15	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Solara.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Solara.exe

Modifies registry class 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	OpenWith.exe
Key created	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000_Classes\Local Settings	OpenWith.exe

Opens file in notepad (likely ransom note) 2 IoCs

ransomware

pid	Process
2448	NOTEPAD.EXE
2668	NOTEPAD.EXE

Suspicious behavior: EnumeratesProcesses 39 IoCs

pid	Process
904	powershell.exe
904	powershell.exe
3356	powershell.exe
3356	powershell.exe
2568	powershell.exe
2568	powershell.exe
2908	powershell.exe
2908	powershell.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe
4500	xcclienttt.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
1692	OpenWith.exe
3348	OpenWith.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4500	xcclienttt.exe
Token: SeDebugPrivilege	904	powershell.exe
Token: SeDebugPrivilege	3356	powershell.exe
Token: SeDebugPrivilege	2568	powershell.exe
Token: SeDebugPrivilege	2908	powershell.exe
Token: SeDebugPrivilege	4500	xcclienttt.exe

Suspicious use of SetWindowsHookEx 35 IoCs

pid	Process
4500	xcclienttt.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
1692	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe
3348	OpenWith.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1888 wrote to memory of 4500	1888	Solara.exe	83
PID 1888 wrote to memory of 4500	1888	Solara.exe	83
PID 4500 wrote to memory of 904	4500	xcclienttt.exe	88
PID 4500 wrote to memory of 904	4500	xcclienttt.exe	88
PID 4500 wrote to memory of 3356	4500	xcclienttt.exe	92
PID 4500 wrote to memory of 3356	4500	xcclienttt.exe	92
PID 4500 wrote to memory of 2568	4500	xcclienttt.exe	94
PID 4500 wrote to memory of 2568	4500	xcclienttt.exe	94
PID 4500 wrote to memory of 2908	4500	xcclienttt.exe	98
PID 4500 wrote to memory of 2908	4500	xcclienttt.exe	98
PID 1692 wrote to memory of 2448	1692	OpenWith.exe	117
PID 1692 wrote to memory of 2448	1692	OpenWith.exe	117
PID 3348 wrote to memory of 2668	3348	OpenWith.exe	119
PID 3348 wrote to memory of 2668	3348	OpenWith.exe	119

C:\Users\Admin\AppData\Local\Temp\Solara.exe
"C:\Users\Admin\AppData\Local\Temp\Solara.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1888
- C:\Users\Admin\AppData\Local\Temp\xcclienttt.exe
  "C:\Users\Admin\AppData\Local\Temp\xcclienttt.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4500
- - 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\xcclienttt.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:904
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'xcclienttt.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3356
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svhost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2568
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2908

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:5068

C:\Users\Admin\AppData\Local\Temp\Solara.exe
"C:\Users\Admin\AppData\Local\Temp\Solara.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:2988

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Log.tmp
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:2448

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3348
- C:\Windows\system32\NOTEPAD.EXE
  "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\1660772826\payload.dat
  2⤵
  - Opens file in notepad (likely ransom note)
  PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

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

Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\Log.tmp

Filesize
50B

MD5
0974c3368779398cd8fa96f5b7ccd8e2

SHA1
956e5a349777c14ab12c9448d2cb5ec7a720d879

SHA256
05b8751d5178cc15ca6b5d9f0b328687e86d2e2d1479bc3b984bb82fcd21f9fa

SHA512
78d80eb5cb5b4ebd4c3281fc98a7b9d785cf453a651effa8a5603ef2881ffd8272df19fd46c1bc6a41aa74f2cd1ebc224287186ade2bc054d1e9c09712950055

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sjfuckdb.0sr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\xcclienttt.exe

Filesize
74KB

MD5
e2f51c1dcd3817d78cd48d3e277e8b57

SHA1
4cf550105fb4ebe4cf44eac5ca4c4f0cf9ac4c76

SHA256
9e67e09788d64c5b287ea2f2f35293d772dff653b10c0a86249eaf3d234f50ed

SHA512
303ff909e5d17fa5dd3689fa92d6220593fe27e692fb910e0b5f9af0bf51118d0e5aede8d35762f401dc0f17f0d8b8a794f54fabf391663ea7dd0f9ea0cb1c5b

Download Submit
memory/904-24-0x000001764DA80000-0x000001764DAA2000-memory.dmp

Filesize
136KB

Download
memory/1888-13-0x0000000000400000-0x0000000003909000-memory.dmp

Filesize
53.0MB

Download
memory/2988-75-0x0000000000400000-0x0000000003909000-memory.dmp

Filesize
53.0MB

Download
memory/3356-39-0x0000020DEE8E0000-0x0000020DEEAFC000-memory.dmp

Filesize
2.1MB

Download
memory/4500-14-0x00007FFCD8F00000-0x00007FFCD99C1000-memory.dmp

Filesize
10.8MB

Download
memory/4500-12-0x0000000000A10000-0x0000000000A28000-memory.dmp

Filesize
96KB

Download
memory/4500-65-0x00007FFCD8F00000-0x00007FFCD99C1000-memory.dmp

Filesize
10.8MB

Download
memory/4500-11-0x00007FFCD8F03000-0x00007FFCD8F05000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads