xworm | e1db7050fa7db2444af89ea3f6f5b25042c03af29626d89321b1647f7a3edb70

General

Target

Solara.exe
Size

241KB
MD5

5551324bfc3838900ae449d1ffdfbde3
SHA1

6aa58fc95bc7b0c2fcd0e819f21f594edbd91812
SHA256

e1db7050fa7db2444af89ea3f6f5b25042c03af29626d89321b1647f7a3edb70
SHA512

997ce1d544edf972c5627ff76eeb90f6937344912e763b961621be3fa16af995bf40dbd23e87148db32b068b0b37f2fea8ed6cdba99dc90a85a31039b94e6a36
SSDEEP

6144:l9xYLd8bIq20AG+FgHUhcX7elbKTua9bfF/H9d9n:/PNrH3X3u+

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%LocalAppData%
install_file
USB.exe
pastebin_url
https://pastebin.com/raw/VcvJgLVt

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/2652-0-0x0000000000510000-0x0000000000552000-memory.dmp	family_xworm
behavioral1/files/0x000c000000023406-58.dat	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
4236	powershell.exe
4948	powershell.exe
1372	powershell.exe
2900	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-1-5-21-3558294865-3673844354-2255444939-1000\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\OneDriwe.lnk	Solara.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\OneDriwe.lnk	Solara.exe

Executes dropped EXE 9 IoCs

pid	Process
2436	OneDriwe
876	OneDriwe
2940	OneDriwe
436	OneDriwe
1816	OneDriwe
1004	OneDriwe
4244	OneDriwe
4492	OneDriwe
1032	OneDriwe

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-1-5-21-3558294865-3673844354-2255444939-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\OneDriwe = "C:\\Users\\Admin\\AppData\\Local\\OneDriwe"	Solara.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 38 IoCs

Web Service

T1102

flow	ioc
21	pastebin.com
35	pastebin.com
12	pastebin.com
13	pastebin.com
17	pastebin.com
18	pastebin.com
47	pastebin.com
52	pastebin.com
20	pastebin.com
27	pastebin.com
30	pastebin.com
46	pastebin.com
23	pastebin.com
26	pastebin.com
44	pastebin.com
50	pastebin.com
15	pastebin.com
16	pastebin.com
24	pastebin.com
42	pastebin.com
54	pastebin.com
5	pastebin.com
28	pastebin.com
32	pastebin.com
48	pastebin.com
51	pastebin.com
53	pastebin.com
25	pastebin.com
39	pastebin.com
40	pastebin.com
41	pastebin.com
14	pastebin.com
19	pastebin.com
22	pastebin.com
33	pastebin.com
36	pastebin.com
37	pastebin.com
49	pastebin.com

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
2	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
4480	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4236	powershell.exe
4236	powershell.exe
4948	powershell.exe
4948	powershell.exe
1372	powershell.exe
1372	powershell.exe
2900	powershell.exe
2900	powershell.exe

Suspicious use of AdjustPrivilegeToken 14 IoCs

description	pid	Process
Token: SeDebugPrivilege	2652	Solara.exe
Token: SeDebugPrivilege	4236	powershell.exe
Token: SeDebugPrivilege	4948	powershell.exe
Token: SeDebugPrivilege	1372	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe
Token: SeDebugPrivilege	2436	OneDriwe
Token: SeDebugPrivilege	876	OneDriwe
Token: SeDebugPrivilege	2940	OneDriwe
Token: SeDebugPrivilege	436	OneDriwe
Token: SeDebugPrivilege	1816	OneDriwe
Token: SeDebugPrivilege	1004	OneDriwe
Token: SeDebugPrivilege	4244	OneDriwe
Token: SeDebugPrivilege	4492	OneDriwe
Token: SeDebugPrivilege	1032	OneDriwe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 4236	2652	Solara.exe	82
PID 2652 wrote to memory of 4236	2652	Solara.exe	82
PID 2652 wrote to memory of 4948	2652	Solara.exe	84
PID 2652 wrote to memory of 4948	2652	Solara.exe	84
PID 2652 wrote to memory of 1372	2652	Solara.exe	86
PID 2652 wrote to memory of 1372	2652	Solara.exe	86
PID 2652 wrote to memory of 2900	2652	Solara.exe	88
PID 2652 wrote to memory of 2900	2652	Solara.exe	88
PID 2652 wrote to memory of 4480	2652	Solara.exe	90
PID 2652 wrote to memory of 4480	2652	Solara.exe	90

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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2652
- 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:4236
- 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:4948
- 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\OneDriwe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1372
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'OneDriwe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "OneDriwe" /tr "C:\Users\Admin\AppData\Local\OneDriwe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4480

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2436

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:876

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2940

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:436

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1816

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1004

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4244

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4492

C:\Users\Admin\AppData\Local\OneDriwe
C:\Users\Admin\AppData\Local\OneDriwe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1032

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\OneDriwe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
1c09764a32d5e64417eeee04c0aa8f03

SHA1
708741c6707654c00fd9dad84fab859e3c195c33

SHA256
49bc1dd65d79931c5ed1f50b89ca5eb8d941574880a17f7655aa7f4b3a2080de

SHA512
cd493aeaab5e8007362986cf8ad85a185cdf71fa6636f89fd7097412ffc631b325184029fa43c8ab8ec240fc90b69c98c6e3167170d6ef58f52ca5d33edaf655

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

Filesize
944B

MD5
2253c665505da63342ef14dd8197f0b5

SHA1
466f37281031aea4ac775d9fb8e91489a85faf82

SHA256
27948dca356cfdff3a5480bdca63a66963505ad1bdc7ff42d1380bf418667436

SHA512
c45fd978256c168493b900ffddded099e0717068b772012bdebfcdcb2377f7a4adf2b968eb37125ed98fdcfb277c9f81fa02f90cfec60f4915d3027c27d7da0d

Download Submit
C:\Users\Admin\AppData\Local\OneDriwe

Filesize
241KB

MD5
5551324bfc3838900ae449d1ffdfbde3

SHA1
6aa58fc95bc7b0c2fcd0e819f21f594edbd91812

SHA256
e1db7050fa7db2444af89ea3f6f5b25042c03af29626d89321b1647f7a3edb70

SHA512
997ce1d544edf972c5627ff76eeb90f6937344912e763b961621be3fa16af995bf40dbd23e87148db32b068b0b37f2fea8ed6cdba99dc90a85a31039b94e6a36

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gb0qz05v.3vo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2652-1-0x00007FFCAA833000-0x00007FFCAA835000-memory.dmp

Filesize
8KB

Download
memory/2652-2-0x00007FFCAA830000-0x00007FFCAB2F1000-memory.dmp

Filesize
10.8MB

Download
memory/2652-0-0x0000000000510000-0x0000000000552000-memory.dmp

Filesize
264KB

Download
memory/2652-56-0x00007FFCAA830000-0x00007FFCAB2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-4-0x00007FFCAA830000-0x00007FFCAB2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-18-0x00007FFCAA830000-0x00007FFCAB2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-11-0x0000023377850000-0x0000023377872000-memory.dmp

Filesize
136KB

Download
memory/4236-5-0x00007FFCAA830000-0x00007FFCAB2F1000-memory.dmp

Filesize
10.8MB

Download
memory/4236-3-0x00007FFCAA830000-0x00007FFCAB2F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads