gurcu | 8cfbd820492a10d05d35bdc16b2a14c1e2cfeea59a7ac580d4ab31e2d9c2f02b

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
11-07-2024 20:33

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General

Target

rootkit2.exe
Size

92KB
MD5

5651e7a81c8fb1fd46815980400e2a5e
SHA1

6ac8c6c10930701bca9acc90d1c05acb679ea0fb
SHA256

8cfbd820492a10d05d35bdc16b2a14c1e2cfeea59a7ac580d4ab31e2d9c2f02b
SHA512

68f2d92610ff1ec6f9c729aac55eacd9b6770772ebdca53f911165713ea895cf3b27119f799cf48c0ab8978fef6c6d9dcd57bb149e24f660c1af1d985faacd3b
SSDEEP

1536:1tyN2QvLnSw2tKKKuax1F8ujwxmHTMHreiQM5CC/Oij5UEd/7Fn:10N2ELnSVK5xf5oHrxQICCmij5UEj

Score

10^/10

gurcu xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

xworm

Version

5.0

127.0.0.1:49403

quotes-suites.gl.at.ply:49403

quotes-suites.gl.at.ply.gg:49403

127.0.0.1:7016

software-orchestra.gl.at.ply.gg:7016

Mutex

NRP6rH1yxlCpJJhG

Attributes

Install_directory
%AppData%
install_file
XClient.exe

aes.plain

Extracted

Family

gurcu

https://api.telegram.org/bot6627858737:AAHxdKC8nYjdelv_iw7J0fHrFBgCVb61I0U/sendMessage?chat_id=5189170483

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023481-6.dat	family_xworm
behavioral2/files/0x00080000000234d5-17.dat	family_xworm
behavioral2/memory/4632-25-0x00000000008F0000-0x0000000000900000-memory.dmp	family_xworm
behavioral2/memory/3272-26-0x0000000000850000-0x0000000000860000-memory.dmp	family_xworm

Gurcu, WhiteSnake
Gurcu is a malware stealer written in C#.
stealer gurcu
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 6 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1496	powershell.exe
4112	powershell.exe
540	powershell.exe
1964	powershell.exe
3564	powershell.exe
208	powershell.exe

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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	rootkit2.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	svhost.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
4632	svhost.exe
3272	XClient.exe
3780	XClient.exe
2376	XClient.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-1-5-21-2990742725-2267136959-192470804-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	svhost.exe

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
17	ip-api.com

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
1996	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
4852	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
428	vlc.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
208	powershell.exe
208	powershell.exe
1496	powershell.exe
1496	powershell.exe
4112	powershell.exe
4112	powershell.exe
540	powershell.exe
540	powershell.exe
1964	powershell.exe
1964	powershell.exe
3272	XClient.exe
3564	powershell.exe
3564	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
428	vlc.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	4632	svhost.exe
Token: SeDebugPrivilege	3272	XClient.exe
Token: SeDebugPrivilege	208	powershell.exe
Token: SeDebugPrivilege	1496	powershell.exe
Token: SeDebugPrivilege	4112	powershell.exe
Token: SeDebugPrivilege	540	powershell.exe
Token: SeDebugPrivilege	1964	powershell.exe
Token: SeDebugPrivilege	3272	XClient.exe
Token: SeDebugPrivilege	3564	powershell.exe
Token: SeDebugPrivilege	4632	svhost.exe
Token: SeDebugPrivilege	3780	XClient.exe
Token: SeDebugPrivilege	2376	XClient.exe

Suspicious use of FindShellTrayWindow 9 IoCs

pid	Process
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe

Suspicious use of SendNotifyMessage 8 IoCs

pid	Process
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe
428	vlc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3272	XClient.exe
428	vlc.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2088 wrote to memory of 4632	2088	rootkit2.exe	83
PID 2088 wrote to memory of 4632	2088	rootkit2.exe	83
PID 2088 wrote to memory of 3272	2088	rootkit2.exe	84
PID 2088 wrote to memory of 3272	2088	rootkit2.exe	84
PID 4632 wrote to memory of 208	4632	svhost.exe	89
PID 4632 wrote to memory of 208	4632	svhost.exe	89
PID 3272 wrote to memory of 1496	3272	XClient.exe	91
PID 3272 wrote to memory of 1496	3272	XClient.exe	91
PID 4632 wrote to memory of 4112	4632	svhost.exe	93
PID 4632 wrote to memory of 4112	4632	svhost.exe	93
PID 3272 wrote to memory of 540	3272	XClient.exe	95
PID 3272 wrote to memory of 540	3272	XClient.exe	95
PID 4632 wrote to memory of 1964	4632	svhost.exe	97
PID 4632 wrote to memory of 1964	4632	svhost.exe	97
PID 4632 wrote to memory of 3564	4632	svhost.exe	99
PID 4632 wrote to memory of 3564	4632	svhost.exe	99
PID 4632 wrote to memory of 4852	4632	svhost.exe	101
PID 4632 wrote to memory of 4852	4632	svhost.exe	101
PID 4632 wrote to memory of 3944	4632	svhost.exe	111
PID 4632 wrote to memory of 3944	4632	svhost.exe	111
PID 4632 wrote to memory of 4468	4632	svhost.exe	113
PID 4632 wrote to memory of 4468	4632	svhost.exe	113
PID 4468 wrote to memory of 1996	4468	cmd.exe	115
PID 4468 wrote to memory of 1996	4468	cmd.exe	115

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\rootkit2.exe
"C:\Users\Admin\AppData\Local\Temp\rootkit2.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2088
- C:\Users\Admin\AppData\Roaming\svhost.exe
  "C:\Users\Admin\AppData\Roaming\svhost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4632
- - 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\svhost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:208
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svhost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4112
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1964
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3564
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4852
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "XClient"
    3⤵
    PID:3944
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBDC8.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4468
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1996
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3272
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1496
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:540

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3780

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\UseRestart.m4a"
1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:428

C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\UseRestart.m4a"
1⤵
PID:752

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2376

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

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\XClient.exe.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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
944B

MD5
04f1d68afbed6b13399edfae1e9b1472

SHA1
8bfdcb687a995e4a63a8c32df2c66dc89f91a8b0

SHA256
f358f33a42122e97c489fad7bbc8beab2eb42d42e4ec7fce0dd61fe6d8c0b8de

SHA512
30c5e72a8134992094d937d2588f7a503b1d6407d11afe0265b7c8b0ce14071925e5caed13fc4f9c28705df4c7aed3601f81b007048b148af274d7784aa5fb75

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

Filesize
944B

MD5
4920f7bec7cdb8ac44637a6af9d2fc6f

SHA1
d4c5e3c9397926ec9bdaccdd955e89f5138b1816

SHA256
8cc607eab702c5690ee5d64f5d34add46b7093c23751506dad728853a434a277

SHA512
321e8178ebd08d680c6d1af467ab73e3055af8c8bb06ee81b1af46bd6718e5a060c339da5a281028c2557ab8d85172921e10363ccd8d411aa0e75f62119838d7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zn1myc1a.wq3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBDC8.tmp.bat

Filesize
155B

MD5
c4dc98993ad98aa8e9816aa920837a33

SHA1
6dd767f37f7944ff81d513e2dcd1000d66d9034a

SHA256
b850af4e9b8fcf818c7990561ceaaee818c79ff1381c93f664a3d4d8d563b4a2

SHA512
9453520499658b3e999109753ba078f57fb936fd7a8e4887d9bbe1200c18b7ec3f8403d2b7e895f1712984fa84f7bad9203aa527a8fbe08c04e5d1d24ba4495d

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

Filesize
40KB

MD5
ca1be8c146c1ab7796b13d29da6f3d78

SHA1
19b723f654ea15ae44d850a2abf5e65fc2a8e8f1

SHA256
1bbe7516f47fd001ab57a168210d8a99a22438e4d65f0cf8a85f2b2c26ff59b5

SHA512
c23ef4ed12ce33f3253e53d22758c49cab18953cf10b9e89c860537050682c2602251e69de0336fb7d37b061ac7bcccfbebdc7090d5b47ee5c8368a02472cf4a

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

Filesize
42KB

MD5
8f07bf27150c3a39dce213aa1e646e6a

SHA1
02130a4626dfe194db890fd4eeb5b02679a1f8c0

SHA256
cc38042dcb39ab32ad8f8cebea17a5694c079de704211ba8955bc5edf4c2268c

SHA512
2d7e266a9e25cee05a8af2c9893570828dc2ddc7f7c972b37edee4d4c95198291a7a09643fc944cebbc8d1ac6dde27a29af12abb69253eec1836eef0cdfc9c05

Download Submit
memory/208-34-0x000001B4F2190000-0x000001B4F21B2000-memory.dmp

Filesize
136KB

Download
memory/428-126-0x00007FF94C4F0000-0x00007FF94C524000-memory.dmp

Filesize
208KB

Download
memory/428-129-0x00007FF935FC0000-0x00007FF9360CE000-memory.dmp

Filesize
1.1MB

Download
memory/428-128-0x00000293ACF90000-0x00000293AE040000-memory.dmp

Filesize
16.7MB

Download
memory/428-127-0x00007FF938390000-0x00007FF938646000-memory.dmp

Filesize
2.7MB

Download
memory/428-125-0x00007FF7ACDD0000-0x00007FF7ACEC8000-memory.dmp

Filesize
992KB

Download
memory/752-112-0x00007FF94C7D0000-0x00007FF94C7E1000-memory.dmp

Filesize
68KB

Download
memory/752-110-0x00007FF950CD0000-0x00007FF950CE8000-memory.dmp

Filesize
96KB

Download
memory/752-111-0x00007FF94C950000-0x00007FF94C967000-memory.dmp

Filesize
92KB

Download
memory/752-108-0x00007FF94C4F0000-0x00007FF94C524000-memory.dmp

Filesize
208KB

Download
memory/752-107-0x00007FF7ACDD0000-0x00007FF7ACEC8000-memory.dmp

Filesize
992KB

Download
memory/752-109-0x00007FF938390000-0x00007FF938646000-memory.dmp

Filesize
2.7MB

Download
memory/2088-0-0x00007FF9462A3000-0x00007FF9462A5000-memory.dmp

Filesize
8KB

Download
memory/2088-1-0x0000000000160000-0x000000000017E000-memory.dmp

Filesize
120KB

Download
memory/3272-29-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/3272-101-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/3272-28-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/3272-26-0x0000000000850000-0x0000000000860000-memory.dmp

Filesize
64KB

Download
memory/4632-103-0x00000000010C0000-0x00000000010CC000-memory.dmp

Filesize
48KB

Download
memory/4632-102-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/4632-100-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/4632-30-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/4632-27-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/4632-137-0x00007FF9462A0000-0x00007FF946D61000-memory.dmp

Filesize
10.8MB

Download
memory/4632-25-0x00000000008F0000-0x0000000000900000-memory.dmp

Filesize
64KB

Download