gurcu | 407811722d5d33124ac105789ae08fc00e50173292d90766b633babfa8243a05

Analysis

max time kernel
32s
max time network
33s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
26/12/2024, 20:36

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General

Target

CraxsRat.exe
Size

74KB
MD5

4ede52da0203635e6710c5c2d342e9a2
SHA1

85543afb17c7b8d5372e37fe436f8f1713535496
SHA256

407811722d5d33124ac105789ae08fc00e50173292d90766b633babfa8243a05
SHA512

d01509d737f6b6d4af14747bb8dc58f7225b91b6ca94204b9cae6ec30f8d4b7cfb944702da622cb1e4ede7aca20cb9c3adccb73b46144abe7676ae370e944f1d
SSDEEP

768:CXnupU7ZFwUkBZq+OjCoPPupelf8/F1xlM5U+sarzcoODlXhwRyfIY63hGukQ7zp:8uBBZzOjOpGf893wE5h4yfIeYlww

Score

10^/10

gurcu stormkitty xworm discovery execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

szqdzaa-22376.portmap.host:22376

Attributes

Install_directory
%AppData%
install_file
SecurityHealthSystray.exe
telegram
https://api.telegram.org/bot6452802278:AAHjSHCysYxHacEO8AgYopBedWCYBDBhX5I/sendMessage?chat_id=5355197127

Extracted

Family

gurcu

https://api.telegram.org/bot6452802278:AAHjSHCysYxHacEO8AgYopBedWCYBDBhX5I/sendMessage?chat_id=5355197127

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00290000000460ed-6.dat	family_xworm
behavioral1/memory/2472-19-0x00000000001D0000-0x00000000001F4000-memory.dmp	family_xworm

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake is a malware stealer written in C#.
stealer gurcu
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 1 IoCs

resource	yara_rule
behavioral1/memory/2472-75-0x000000001F560000-0x000000001F680000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty
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
2976	powershell.exe
3004	powershell.exe
2052	powershell.exe
3512	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-1-5-21-1006597246-3150276181-3318461161-1000\Control Panel\International\Geo\Nation	CraxsRat.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1006597246-3150276181-3318461161-1000\Control Panel\International\Geo\Nation	SecurityHealthSystray.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
2472	SecurityHealthSystray.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-1006597246-3150276181-3318461161-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray = "C:\\Users\\Admin\\AppData\\Roaming\\SecurityHealthSystray.exe"	SecurityHealthSystray.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
404	timeout.exe

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
928	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2976	powershell.exe
2976	powershell.exe
3004	powershell.exe
3004	powershell.exe
2052	powershell.exe
2052	powershell.exe
3512	powershell.exe
3512	powershell.exe
2472	SecurityHealthSystray.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2472	SecurityHealthSystray.exe
Token: SeDebugPrivilege	2976	powershell.exe
Token: SeIncreaseQuotaPrivilege	2976	powershell.exe
Token: SeSecurityPrivilege	2976	powershell.exe
Token: SeTakeOwnershipPrivilege	2976	powershell.exe
Token: SeLoadDriverPrivilege	2976	powershell.exe
Token: SeSystemProfilePrivilege	2976	powershell.exe
Token: SeSystemtimePrivilege	2976	powershell.exe
Token: SeProfSingleProcessPrivilege	2976	powershell.exe
Token: SeIncBasePriorityPrivilege	2976	powershell.exe
Token: SeCreatePagefilePrivilege	2976	powershell.exe
Token: SeBackupPrivilege	2976	powershell.exe
Token: SeRestorePrivilege	2976	powershell.exe
Token: SeShutdownPrivilege	2976	powershell.exe
Token: SeDebugPrivilege	2976	powershell.exe
Token: SeSystemEnvironmentPrivilege	2976	powershell.exe
Token: SeRemoteShutdownPrivilege	2976	powershell.exe
Token: SeUndockPrivilege	2976	powershell.exe
Token: SeManageVolumePrivilege	2976	powershell.exe
Token: 33	2976	powershell.exe
Token: 34	2976	powershell.exe
Token: 35	2976	powershell.exe
Token: 36	2976	powershell.exe
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeIncreaseQuotaPrivilege	3004	powershell.exe
Token: SeSecurityPrivilege	3004	powershell.exe
Token: SeTakeOwnershipPrivilege	3004	powershell.exe
Token: SeLoadDriverPrivilege	3004	powershell.exe
Token: SeSystemProfilePrivilege	3004	powershell.exe
Token: SeSystemtimePrivilege	3004	powershell.exe
Token: SeProfSingleProcessPrivilege	3004	powershell.exe
Token: SeIncBasePriorityPrivilege	3004	powershell.exe
Token: SeCreatePagefilePrivilege	3004	powershell.exe
Token: SeBackupPrivilege	3004	powershell.exe
Token: SeRestorePrivilege	3004	powershell.exe
Token: SeShutdownPrivilege	3004	powershell.exe
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeSystemEnvironmentPrivilege	3004	powershell.exe
Token: SeRemoteShutdownPrivilege	3004	powershell.exe
Token: SeUndockPrivilege	3004	powershell.exe
Token: SeManageVolumePrivilege	3004	powershell.exe
Token: 33	3004	powershell.exe
Token: 34	3004	powershell.exe
Token: 35	3004	powershell.exe
Token: 36	3004	powershell.exe
Token: SeDebugPrivilege	2052	powershell.exe
Token: SeIncreaseQuotaPrivilege	2052	powershell.exe
Token: SeSecurityPrivilege	2052	powershell.exe
Token: SeTakeOwnershipPrivilege	2052	powershell.exe
Token: SeLoadDriverPrivilege	2052	powershell.exe
Token: SeSystemProfilePrivilege	2052	powershell.exe
Token: SeSystemtimePrivilege	2052	powershell.exe
Token: SeProfSingleProcessPrivilege	2052	powershell.exe
Token: SeIncBasePriorityPrivilege	2052	powershell.exe
Token: SeCreatePagefilePrivilege	2052	powershell.exe
Token: SeBackupPrivilege	2052	powershell.exe
Token: SeRestorePrivilege	2052	powershell.exe
Token: SeShutdownPrivilege	2052	powershell.exe
Token: SeDebugPrivilege	2052	powershell.exe
Token: SeSystemEnvironmentPrivilege	2052	powershell.exe
Token: SeRemoteShutdownPrivilege	2052	powershell.exe
Token: SeUndockPrivilege	2052	powershell.exe
Token: SeManageVolumePrivilege	2052	powershell.exe
Token: 33	2052	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2472	SecurityHealthSystray.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 2472	2012	CraxsRat.exe	82
PID 2012 wrote to memory of 2472	2012	CraxsRat.exe	82
PID 2472 wrote to memory of 2976	2472	SecurityHealthSystray.exe	87
PID 2472 wrote to memory of 2976	2472	SecurityHealthSystray.exe	87
PID 2472 wrote to memory of 3004	2472	SecurityHealthSystray.exe	90
PID 2472 wrote to memory of 3004	2472	SecurityHealthSystray.exe	90
PID 2472 wrote to memory of 2052	2472	SecurityHealthSystray.exe	93
PID 2472 wrote to memory of 2052	2472	SecurityHealthSystray.exe	93
PID 2472 wrote to memory of 3512	2472	SecurityHealthSystray.exe	95
PID 2472 wrote to memory of 3512	2472	SecurityHealthSystray.exe	95
PID 2472 wrote to memory of 928	2472	SecurityHealthSystray.exe	99
PID 2472 wrote to memory of 928	2472	SecurityHealthSystray.exe	99
PID 2472 wrote to memory of 2820	2472	SecurityHealthSystray.exe	103
PID 2472 wrote to memory of 2820	2472	SecurityHealthSystray.exe	103
PID 2472 wrote to memory of 920	2472	SecurityHealthSystray.exe	105
PID 2472 wrote to memory of 920	2472	SecurityHealthSystray.exe	105
PID 920 wrote to memory of 404	920	cmd.exe	107
PID 920 wrote to memory of 404	920	cmd.exe	107

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\CraxsRat.exe
"C:\Users\Admin\AppData\Local\Temp\CraxsRat.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\AppData\Local\Temp\SecurityHealthSystray.exe
  "C:\Users\Admin\AppData\Local\Temp\SecurityHealthSystray.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:2472
- - 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\SecurityHealthSystray.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2976
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SecurityHealthSystray.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3004
- - 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\SecurityHealthSystray.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2052
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SecurityHealthSystray.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3512
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "SecurityHealthSystray" /tr "C:\Users\Admin\AppData\Roaming\SecurityHealthSystray.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:928
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "SecurityHealthSystray"
    3⤵
    PID:2820
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFC2E.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:920
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:404

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
26c94c408a5a2e1e04f1191fc2902d3e

SHA1
ce50b153be03511bd62a477abf71a7e9f94e68a5

SHA256
86ad00a425874b935cc725f83780add09d08d7dc9cbfb705821955fe937c05ec

SHA512
70e7bc620b369d7d0fcf06f93da000819bf089a502f1014641ad14d56ead22f31c25b97363296fd3749c63bde6db3bf115b33504b160485d792e1331c337b586

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

Filesize
1KB

MD5
bcabe17a89aa6ba8c6453492a18ebd87

SHA1
7ef451befe7725e4476a19c1c94c4cf0c5fdbbad

SHA256
a8adf95d6bbc7e540ea0110f42e557c52953f6c71539ebc2a9b1cd156c140392

SHA512
5fd2c8f64eaf801f193c1a04deceb200b01e4a4b6140e8fde9d14cc57299c8eb983e165888f9251e1ebbb8b28b1c6636b709b935af61015deef69693347d6301

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

Filesize
1KB

MD5
72877eafebfbc7315b765f6fa4e29418

SHA1
7e7469f485925677b3d5b6b972506a5eb06445b5

SHA256
d4a7ff06b8e271dfc46a8466514453c457d3a0142d8b222808a4467aa44ca688

SHA512
1b91f2dd9118b6232dcd346b35e24928a0577edbd956c7f285b5835d8fd9fb15dc5412d8db14e780f0af03bd679d3cc2658ac27c14654f5eeb0e5dc8897ae559

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

Filesize
119KB

MD5
d29f0ca8cb7a02d19f9d12043f09f7b5

SHA1
0e3bfab1566563249259229c03f62fa47d8936c3

SHA256
c6d3b827fa2a9bb3d320be67fd67947dca186b59f8a28dfa4f138e98f31533d1

SHA512
5b23ebaa1813571b0e57375ef94957c9c8ccd04e8549581424de7d11a7cf434e75a8a59e7d9141a6f09463d6185f5979ce3860d9f97c1e546f88120f83f3062d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qb5ap4l2.4hn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpFC2E.tmp.bat

Filesize
173B

MD5
460d70c4ef5c4deaa19e8b263f155361

SHA1
b020e85ceba0ef171ef088764d49e24c855fed11

SHA256
33c5e393387530778524da51e6bfc8ce843a095cc5fa47bbebb539129aa8680c

SHA512
f85affa39e537677538a6ebfd1e3ec640ff86608a030a1ca375e274b68b17563c8ea994fa2672bbaf14be4c2e166947e5280a9261a1aa0620aec07c389316631

Download Submit
memory/2012-18-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2012-0-0x00007FFC990A3000-0x00007FFC990A5000-memory.dmp

Filesize
8KB

Download
memory/2012-13-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2012-1-0x0000000000870000-0x0000000000888000-memory.dmp

Filesize
96KB

Download
memory/2472-20-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2472-19-0x00000000001D0000-0x00000000001F4000-memory.dmp

Filesize
144KB

Download
memory/2472-71-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2472-72-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2472-73-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2472-74-0x000000001AFA0000-0x000000001AFAC000-memory.dmp

Filesize
48KB

Download
memory/2472-75-0x000000001F560000-0x000000001F680000-memory.dmp

Filesize
1.1MB

Download
memory/2472-83-0x00007FFC990A0000-0x00007FFC99B62000-memory.dmp

Filesize
10.8MB

Download
memory/2976-21-0x000001E5CBF60000-0x000001E5CBF82000-memory.dmp

Filesize
136KB

Download