xworm | 2208d8cec15b9f5cb0d2633a9fa0761120a6432927b1401c0683df982f00205a

General

Target

Solara.exe
Size

44KB
MD5

2d77b2cc88d69fbae3a3b7d5f89e1de2
SHA1

09cf5e15b06a5b962247b45807594808a66e38c8
SHA256

2208d8cec15b9f5cb0d2633a9fa0761120a6432927b1401c0683df982f00205a
SHA512

f890a7a0c009a2edab6c134b51e813a97697193c3a4c47de3f8a4eb2c635444cf178f0f36b7343db79d54dd95d449bbec63957e83c40b83af2d75168f6863aac
SSDEEP

768:qNTRmetisWt2tKdouL3ZE9R9yFRPG9XZVkw6OOChDsGO6Mi1:qNTketz8npE92Fw9Xvkw6OOCdVO9i1

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

AXTHi4CYiQFk7lUs

Attributes

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

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2292-1-0x00000000004F0000-0x0000000000502000-memory.dmp	family_xworm
behavioral1/files/0x000600000001ea24-58.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
3244	powershell.exe
2956	powershell.exe
5028	powershell.exe
2600	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-2593460650-190333679-3676257533-1000\Control Panel\International\Geo\Nation	Solara.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 18 IoCs

pid	Process
4136	svchost.exe
812	svchost.exe
3268	svchost.exe
3296	svchost.exe
3728	svchost.exe
4796	svchost.exe
4384	svchost.exe
4460	svchost.exe
4040	svchost.exe
4312	svchost.exe
2712	svchost.exe
440	svchost.exe
2360	svchost.exe
368	svchost.exe
1692	svchost.exe
764	svchost.exe
3348	svchost.exe
1688	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-1-5-21-2593460650-190333679-3676257533-1000\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
29	pastebin.com
30	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
4404	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
5028	powershell.exe
5028	powershell.exe
2600	powershell.exe
2600	powershell.exe
3244	powershell.exe
3244	powershell.exe
2956	powershell.exe
2956	powershell.exe
2292	Solara.exe

Suspicious use of AdjustPrivilegeToken 24 IoCs

description	pid	Process
Token: SeDebugPrivilege	2292	Solara.exe
Token: SeDebugPrivilege	5028	powershell.exe
Token: SeDebugPrivilege	2600	powershell.exe
Token: SeDebugPrivilege	3244	powershell.exe
Token: SeDebugPrivilege	2956	powershell.exe
Token: SeDebugPrivilege	2292	Solara.exe
Token: SeDebugPrivilege	4136	svchost.exe
Token: SeDebugPrivilege	812	svchost.exe
Token: SeDebugPrivilege	3268	svchost.exe
Token: SeDebugPrivilege	3296	svchost.exe
Token: SeDebugPrivilege	3728	svchost.exe
Token: SeDebugPrivilege	4796	svchost.exe
Token: SeDebugPrivilege	4384	svchost.exe
Token: SeDebugPrivilege	4460	svchost.exe
Token: SeDebugPrivilege	4040	svchost.exe
Token: SeDebugPrivilege	4312	svchost.exe
Token: SeDebugPrivilege	2712	svchost.exe
Token: SeDebugPrivilege	440	svchost.exe
Token: SeDebugPrivilege	2360	svchost.exe
Token: SeDebugPrivilege	368	svchost.exe
Token: SeDebugPrivilege	1692	svchost.exe
Token: SeDebugPrivilege	764	svchost.exe
Token: SeDebugPrivilege	3348	svchost.exe
Token: SeDebugPrivilege	1688	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2292	Solara.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 5028	2292	Solara.exe	90
PID 2292 wrote to memory of 5028	2292	Solara.exe	90
PID 2292 wrote to memory of 2600	2292	Solara.exe	92
PID 2292 wrote to memory of 2600	2292	Solara.exe	92
PID 2292 wrote to memory of 3244	2292	Solara.exe	94
PID 2292 wrote to memory of 3244	2292	Solara.exe	94
PID 2292 wrote to memory of 2956	2292	Solara.exe	98
PID 2292 wrote to memory of 2956	2292	Solara.exe	98
PID 2292 wrote to memory of 4404	2292	Solara.exe	102
PID 2292 wrote to memory of 4404	2292	Solara.exe	102

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⤵
- Checks computer location settings
- 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:2292
- 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:5028
- 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:2600
- 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.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3244
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2956
- 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:4404

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4136

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:812

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3268

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3296

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3728

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4796

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4384

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4460

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4040

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4312

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2712

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:440

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2360

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:368

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1692

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:764

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3348

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1688

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

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

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\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
e73177574e6bc8e35ba0247044cce82e

SHA1
fee49bf7fabc998bf0c6e6427fa3c1e95800d230

SHA256
19203153fb14d0839deb91301581159a308528575387b52c536f871ff80d2789

SHA512
26519fdccd345c83da30acd3dd179c8c0fca9eb727c8e0efe4241cf9d39462b8d9fa8e1b9e8cde16cb0342d48dffc8569d0398db3eeba9c499311bc690e923f6

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

Filesize
944B

MD5
3072fa0040b347c3941144486bf30c6f

SHA1
e6dc84a5bd882198583653592f17af1bf8cbfc68

SHA256
da8b533f81b342503c109e46b081b5c5296fdad5481f93fe5cc648e49ca6238e

SHA512
62df0eed621fe8ec340887a03d26b125429025c14ddcdfef82cb78ce1c9c6110c1d51ff0e423754d7966b6251363bf92833970eaf67707f8dd62e1549a79536c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dmzbdski.x4s.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
44KB

MD5
2d77b2cc88d69fbae3a3b7d5f89e1de2

SHA1
09cf5e15b06a5b962247b45807594808a66e38c8

SHA256
2208d8cec15b9f5cb0d2633a9fa0761120a6432927b1401c0683df982f00205a

SHA512
f890a7a0c009a2edab6c134b51e813a97697193c3a4c47de3f8a4eb2c635444cf178f0f36b7343db79d54dd95d449bbec63957e83c40b83af2d75168f6863aac

Download Submit
memory/2292-56-0x00007FFDAB850000-0x00007FFDAC311000-memory.dmp

Filesize
10.8MB

Download
memory/2292-0-0x00007FFDAB853000-0x00007FFDAB855000-memory.dmp

Filesize
8KB

Download
memory/2292-57-0x00007FFDAB853000-0x00007FFDAB855000-memory.dmp

Filesize
8KB

Download
memory/2292-61-0x00007FFDAB850000-0x00007FFDAC311000-memory.dmp

Filesize
10.8MB

Download
memory/2292-1-0x00000000004F0000-0x0000000000502000-memory.dmp

Filesize
72KB

Download
memory/5028-17-0x00007FFDAB850000-0x00007FFDAC311000-memory.dmp

Filesize
10.8MB

Download
memory/5028-14-0x00007FFDAB850000-0x00007FFDAC311000-memory.dmp

Filesize
10.8MB

Download
memory/5028-13-0x00007FFDAB850000-0x00007FFDAC311000-memory.dmp

Filesize
10.8MB

Download
memory/5028-12-0x00007FFDAB850000-0x00007FFDAC311000-memory.dmp

Filesize
10.8MB

Download
memory/5028-7-0x0000017F5EA90000-0x0000017F5EAB2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads