gurcu | ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952

General

Target

ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe
Size

580KB
MD5

618cde762459c080282d9074bdf7f6f8
SHA1

b4a1fa65153e4ecbe505d6e16fee69e51cd0c58c
SHA256

ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952
SHA512

0edc45b0b6b4ce06bdd603470c2fe70f5b7493957fa74d1c2bf5802d8f4dd377842d1d73ae686c608165f470434bf894538f7ef422faa0c897d948282df07b81
SSDEEP

12288:2aNNTd2p3eZmbtueoiM4TGzqSB3VuVbfrJ/79gUkvjM5a5HGmgZq6:2eTd2pwmbQ9ibWFanavsaxGxk6

Score

10^/10

gurcu credential_access discovery execution persistence spyware stealer

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot6778517563:AAHWX9Uu5kbGG8tbi2AVnm_iK8s3bKlnB3M/sendDocumen

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2356	powershell.exe
2624	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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	file.exe

Executes dropped EXE 1 IoCs

pid	Process
1736	file.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
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
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\file = "C:\\Users\\Admin\\AppData\\Local\\Temp\\B258.tmp\\file.exe"	file.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

System Location Discovery: System Language Discovery 1 TTPs 1 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	ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\ms-settings	file.exe
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\ms-settings\shell	file.exe
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\ms-settings\shell\open	file.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\ms-settings\shell\open\command\	file.exe
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\ms-settings\shell\open\command	file.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

pid	Process
2624	powershell.exe
2356	powershell.exe
2356	powershell.exe
2624	powershell.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe
1736	file.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	file.exe
Token: SeDebugPrivilege	2356	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4468 wrote to memory of 3104	4468	ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe	85
PID 4468 wrote to memory of 3104	4468	ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe	85
PID 3104 wrote to memory of 1736	3104	wscript.exe	88
PID 3104 wrote to memory of 1736	3104	wscript.exe	88
PID 1736 wrote to memory of 3348	1736	file.exe	89
PID 1736 wrote to memory of 3348	1736	file.exe	89
PID 1736 wrote to memory of 1888	1736	file.exe	91
PID 1736 wrote to memory of 1888	1736	file.exe	91
PID 3348 wrote to memory of 2356	3348	cmd.exe	93
PID 3348 wrote to memory of 2356	3348	cmd.exe	93
PID 1888 wrote to memory of 2624	1888	cmd.exe	94
PID 1888 wrote to memory of 2624	1888	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe
"C:\Users\Admin\AppData\Local\Temp\ad4f601be8e0069f4db65b7d19d066e0a58705f6a70dd4fc2982ab0de1021952.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4468
- C:\Windows\system32\wscript.exe
  "C:\Windows\sysnative\wscript.exe" C:\Users\Admin\AppData\Local\Temp\B258.tmp\B259.tmp\B25A.vbs //Nologo
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:3104
- - C:\Users\Admin\AppData\Local\Temp\B258.tmp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\B258.tmp\file.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1736
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\B258.tmp\file.exe & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3348
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionPath C:\Users\Admin\AppData\Local\Temp\B258.tmp\file.exe
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2356
  - - C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /k start /b powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionExtension .exe & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1888
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell -inputformat none -outputformat none -NonInteractive -Command Add-MpPreference -ExclusionExtension .exe
        5⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2624

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:3568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

3

T1552

Credentials In Files

3

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
64B

MD5
d8b9a260789a22d72263ef3bb119108c

SHA1
376a9bd48726f422679f2cd65003442c0b6f6dd5

SHA256
d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc

SHA512
550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b

Download Submit
C:\Users\Admin\AppData\Local\Temp\B258.tmp\B259.tmp\B25A.vbs

Filesize
993KB

MD5
5a868260808a671876a72a2bcbe51330

SHA1
09bdee7ba0a95ccb489c2af57abde901a9a18a69

SHA256
423ec3c214f5ce0db6b53c254f480aeee4eb4691404f77405fbb54617d2c047f

SHA512
e00f2fee3927a9ef4bd1dec4d480c64bd338ee6bb42ce3c7869962b60ff4052a5dfa9e9fa25c6b6c18ef52cbc7a25c95b7dc868ff80f0873f495cd99b7ea37f6

Download Submit
C:\Users\Admin\AppData\Local\Temp\B258.tmp\file.exe

Filesize
136KB

MD5
bab3cb62cebe3a18436fa8a60bc32754

SHA1
98fca3544509c24d7647f2aca85e021774a93663

SHA256
9a2251cd0659f32759f589124a0aec75a046d3137fcb3138dacd87c087d38768

SHA512
71805cb421dba13f1869382507f1ac1c1fdf0017ed65512430ca65fc711721bcf1c5eb0743a3d846e35fa8c10fd547a329b08539eff68aabff81fdec773be703

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pbqn3g3z.l00.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1736-13-0x00007FF987313000-0x00007FF987315000-memory.dmp

Filesize
8KB

Download
memory/1736-14-0x0000000000CC0000-0x0000000000CE8000-memory.dmp

Filesize
160KB

Download
memory/1736-15-0x00007FF987310000-0x00007FF987DD1000-memory.dmp

Filesize
10.8MB

Download
memory/1736-40-0x00007FF987313000-0x00007FF987315000-memory.dmp

Filesize
8KB

Download
memory/1736-41-0x00007FF987310000-0x00007FF987DD1000-memory.dmp

Filesize
10.8MB

Download
memory/2624-30-0x000001A1E5780000-0x000001A1E57A2000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads