gurcu | ef1737d52757e66af3d80c1a64ee974236f011783cb54960a1f6adc5a47386fa

General

Target

XLOADER.exe
Size

165KB
MD5

35faa4d7d6a4ce2d4af4c66f42547af7
SHA1

e844d33f3bd11f49822e0314732c7a13e9ee8e29
SHA256

ef1737d52757e66af3d80c1a64ee974236f011783cb54960a1f6adc5a47386fa
SHA512

baa7c5a212dff66fedbf6ed3325ad3cd9dc17831a35450125a63ebecd735df1a16ce4362c6e8518586b6f5895b3950f4573cf8721e55a9fcc67d1fddb35ea3e2
SSDEEP

3072:LrLWKPAfXXXMaaJBGye1k07+X7hje/MbuYDDs6POkfEKVRuLS:LuY2XSJB7e1LIwEbDDBmkfEK

Score

10^/10

gurcu xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

xworm

C2

sponef159-35748.portmap.host:35748

Attributes

Install_directory
%AppData%
install_file
svchost.exe
telegram
https://api.telegram.org/bot7508868671:AAG6XIOhz39IrQIUnjub1TKVOVZHfdjpsvM/sendMessage?chat_id=6094400048

Extracted

Family

gurcu

C2

https://api.telegram.org/bot7508868671:AAG6XIOhz39IrQIUnjub1TKVOVZHfdjpsvM/sendMessage?chat_id=6094400048

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000c000000023b74-6.dat	family_xworm
behavioral1/memory/1708-14-0x0000000000150000-0x0000000000162000-memory.dmp	family_xworm

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake is a malware stealer written in C#.
stealer gurcu
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
4740	powershell.exe
4916	powershell.exe
3796	powershell.exe
3448	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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	XLOADER.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
1708	XClient.exe
3480	svchost.exe
4056	svchost.exe
3052	svchost.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-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	XClient.exe

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
1832	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
4740	powershell.exe
4740	powershell.exe
4916	powershell.exe
4916	powershell.exe
3796	powershell.exe
3796	powershell.exe
3448	powershell.exe
3448	powershell.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1708	XClient.exe
Token: SeDebugPrivilege	4740	powershell.exe
Token: SeDebugPrivilege	4916	powershell.exe
Token: SeDebugPrivilege	3796	powershell.exe
Token: SeDebugPrivilege	3448	powershell.exe
Token: SeDebugPrivilege	1708	XClient.exe
Token: SeDebugPrivilege	3480	svchost.exe
Token: SeDebugPrivilege	4056	svchost.exe
Token: SeDebugPrivilege	3052	svchost.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2272 wrote to memory of 1708	2272	XLOADER.exe	83
PID 2272 wrote to memory of 1708	2272	XLOADER.exe	83
PID 1708 wrote to memory of 4740	1708	XClient.exe	86
PID 1708 wrote to memory of 4740	1708	XClient.exe	86
PID 1708 wrote to memory of 4916	1708	XClient.exe	88
PID 1708 wrote to memory of 4916	1708	XClient.exe	88
PID 1708 wrote to memory of 3796	1708	XClient.exe	90
PID 1708 wrote to memory of 3796	1708	XClient.exe	90
PID 1708 wrote to memory of 3448	1708	XClient.exe	92
PID 1708 wrote to memory of 3448	1708	XClient.exe	92
PID 1708 wrote to memory of 1832	1708	XClient.exe	94
PID 1708 wrote to memory of 1832	1708	XClient.exe	94
PID 1708 wrote to memory of 1788	1708	XClient.exe	114
PID 1708 wrote to memory of 1788	1708	XClient.exe	114
PID 1708 wrote to memory of 1840	1708	XClient.exe	116
PID 1708 wrote to memory of 1840	1708	XClient.exe	116

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\XLOADER.exe
"C:\Users\Admin\AppData\Local\Temp\XLOADER.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2272
- C:\Users\Admin\AppData\Local\Temp\XClient.exe
  "C:\Users\Admin\AppData\Local\Temp\XClient.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:1708
- - 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\XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4740
- - 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:4916
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3796
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3448
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1832
- - C:\Windows\SYSTEM32\CMD.EXE
    "CMD.EXE"
    3⤵
    PID:1788
- - C:\Windows\SYSTEM32\CMD.EXE
    "CMD.EXE"
    3⤵
    PID:1840

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3480

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4056

C:\Users\Admin\AppData\Roaming\svchost.exe
C:\Users\Admin\AppData\Roaming\svchost.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3052

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

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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\CLR_v4.0\UsageLogs\svchost.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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
fd98baf5a9c30d41317663898985593b

SHA1
ea300b99f723d2429d75a6c40e0838bf60f17aad

SHA256
9d97a5bbc88fdcceac25f293383f7e5ce242675460ffbfb2ee9090870c034e96

SHA512
bf4dbbd671b5d7afb326622a7c781f150860294d3dba7160330046c258c84a15981c70e50d84dc7faaa7cc8b8c90bf8df818b3f2d3806a8a3671dfe5e38fe7b0

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

Filesize
944B

MD5
82f6682ddcfc025adbb65c3ab116145f

SHA1
4590665b8969a96ad26f282a4bb56d6079f85f61

SHA256
10a805bf7715d4e0813be69dafbb2a95c1fdd7b700a13641d9f58781dfd6393f

SHA512
bf941a63583fb62ce6ad1c4f163ebae1745159d355b2649ac72fcd2747462b93601b06f9660aa13e182a6ef48c4256eda2650186da9165779e337abcd177e496

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

Filesize
49KB

MD5
9cda258445b322eb90f65b32ba86d86c

SHA1
d86a39dcc80db9cef23fc389dbbb6951ed7f908c

SHA256
0aca70f4574b4f593ad118de1846cb744eed48473a8fd51759c37e508d44e50f

SHA512
f76c77b63b6e881cd6e9a436b5efe5e4a45a8e78126fcc6876ec6855ef2572ba7e9dec7200e32ddca78f232d451305f87729ee5989f3c8ed83cde53d132a1d9a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kmptqqb5.yko.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1708-15-0x00007FFBC48C0000-0x00007FFBC5381000-memory.dmp

Filesize
10.8MB

Download
memory/1708-14-0x0000000000150000-0x0000000000162000-memory.dmp

Filesize
72KB

Download
memory/1708-66-0x00007FFBC48C0000-0x00007FFBC5381000-memory.dmp

Filesize
10.8MB

Download
memory/1708-69-0x00007FFBC48C0000-0x00007FFBC5381000-memory.dmp

Filesize
10.8MB

Download
memory/1708-71-0x00007FFBC48C0000-0x00007FFBC5381000-memory.dmp

Filesize
10.8MB

Download
memory/1708-72-0x0000000002490000-0x000000000249A000-memory.dmp

Filesize
40KB

Download
memory/2272-0-0x00007FFBC48C3000-0x00007FFBC48C5000-memory.dmp

Filesize
8KB

Download
memory/2272-1-0x0000000000400000-0x000000000042E000-memory.dmp

Filesize
184KB

Download
memory/4740-25-0x0000026938650000-0x0000026938672000-memory.dmp

Filesize
136KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads