guloader | 83ba4e290da54c23797a42fb6d97b9381a067134c8a19267071182ab8595473d

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
11-09-2024 21:15

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General

Target

Benefit_Signature_Plan#3762.exe
Size

501KB
MD5

4c906f03f8cbdcd7c66a15f6c8498330
SHA1

91e1270fc52b760ff2913f2db910f78c6051b74d
SHA256

cff42a20c90a525f62cf6c71c7362a9b94765f00f25c29faa20f2a0d67090ba8
SHA512

2ca1a394952bf0cef296f9015585b9a3bc261958350ed19e43adc4e778050320d46ac7f1854093f330a4000e4123361765769db2a569f93750f917e10564f717
SSDEEP

12288:pbZxvzlLYN4fYSq7UpiiArc3mYAR27YAC1/:xZxpflpiFymHR2bI

Score

10^/10

guloader collection credential_access discovery downloader spyware stealer

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 8 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral5/memory/2632-46-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral5/memory/2632-42-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral5/memory/2608-41-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral5/memory/2688-45-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral5/memory/2688-47-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral5/memory/2688-48-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral5/memory/2608-54-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral5/memory/2632-57-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral5/memory/2632-46-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral5/memory/2632-42-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral5/memory/2632-57-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral5/memory/2608-41-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral5/memory/2608-54-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
2112	Benefit_Signature_Plan#3762.exe
2112	Benefit_Signature_Plan#3762.exe

Reads user/profile data of web browsers 2 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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Benefit_Signature_Plan#3762.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
2872	Benefit_Signature_Plan#3762.exe
2872	Benefit_Signature_Plan#3762.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2112	Benefit_Signature_Plan#3762.exe
2872	Benefit_Signature_Plan#3762.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2112 set thread context of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2872 set thread context of 2608	2872	Benefit_Signature_Plan#3762.exe	33
PID 2872 set thread context of 2632	2872	Benefit_Signature_Plan#3762.exe	34
PID 2872 set thread context of 2688	2872	Benefit_Signature_Plan#3762.exe	35

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\Computerskrift\Skrabnsers180.Ope72	Benefit_Signature_Plan#3762.exe

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 5 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	Benefit_Signature_Plan#3762.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Benefit_Signature_Plan#3762.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Benefit_Signature_Plan#3762.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Benefit_Signature_Plan#3762.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Benefit_Signature_Plan#3762.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2608	Benefit_Signature_Plan#3762.exe
2608	Benefit_Signature_Plan#3762.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2112	Benefit_Signature_Plan#3762.exe
2872	Benefit_Signature_Plan#3762.exe
2872	Benefit_Signature_Plan#3762.exe
2872	Benefit_Signature_Plan#3762.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2688	Benefit_Signature_Plan#3762.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2112 wrote to memory of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2112 wrote to memory of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2112 wrote to memory of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2112 wrote to memory of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2112 wrote to memory of 2872	2112	Benefit_Signature_Plan#3762.exe	31
PID 2872 wrote to memory of 2608	2872	Benefit_Signature_Plan#3762.exe	33
PID 2872 wrote to memory of 2608	2872	Benefit_Signature_Plan#3762.exe	33
PID 2872 wrote to memory of 2608	2872	Benefit_Signature_Plan#3762.exe	33
PID 2872 wrote to memory of 2608	2872	Benefit_Signature_Plan#3762.exe	33
PID 2872 wrote to memory of 2632	2872	Benefit_Signature_Plan#3762.exe	34
PID 2872 wrote to memory of 2632	2872	Benefit_Signature_Plan#3762.exe	34
PID 2872 wrote to memory of 2632	2872	Benefit_Signature_Plan#3762.exe	34
PID 2872 wrote to memory of 2632	2872	Benefit_Signature_Plan#3762.exe	34
PID 2872 wrote to memory of 2688	2872	Benefit_Signature_Plan#3762.exe	35
PID 2872 wrote to memory of 2688	2872	Benefit_Signature_Plan#3762.exe	35
PID 2872 wrote to memory of 2688	2872	Benefit_Signature_Plan#3762.exe	35
PID 2872 wrote to memory of 2688	2872	Benefit_Signature_Plan#3762.exe	35

C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe
"C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe
  "C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2872
- - C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe
    C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe /stext "C:\Users\Admin\AppData\Local\Temp\prgzldftdpblscriypj"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2608
- - C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe
    C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe /stext "C:\Users\Admin\AppData\Local\Temp\rtljlwqvrxtqcjnmpaelasq"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2632
- - C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe
    C:\Users\Admin\AppData\Local\Temp\Benefit_Signature_Plan#3762.exe /stext "C:\Users\Admin\AppData\Local\Temp\cnrcmgaoffldepbyzcqmlxkldn"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\prgzldftdpblscriypj

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsdB53C.tmp\System.dll

Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

Download Submit
memory/2112-34-0x0000000003B10000-0x0000000006670000-memory.dmp

Filesize
43.4MB

Download
memory/2112-27-0x0000000003B10000-0x0000000006670000-memory.dmp

Filesize
43.4MB

Download
memory/2112-29-0x0000000077430000-0x00000000775D9000-memory.dmp

Filesize
1.7MB

Download
memory/2112-28-0x0000000077431000-0x0000000077532000-memory.dmp

Filesize
1.0MB

Download
memory/2112-30-0x0000000003B10000-0x0000000006670000-memory.dmp

Filesize
43.4MB

Download
memory/2608-54-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2608-39-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2608-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2608-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2632-37-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2632-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2632-57-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2632-42-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2632-40-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2688-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2688-45-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2688-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2688-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2688-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2872-32-0x0000000001870000-0x00000000043D0000-memory.dmp

Filesize
43.4MB

Download
memory/2872-31-0x0000000077430000-0x00000000775D9000-memory.dmp

Filesize
1.7MB

Download
memory/2872-59-0x0000000005EA0000-0x0000000005EB9000-memory.dmp

Filesize
100KB

Download
memory/2872-63-0x0000000005EA0000-0x0000000005EB9000-memory.dmp

Filesize
100KB

Download
memory/2872-62-0x0000000005EA0000-0x0000000005EB9000-memory.dmp

Filesize
100KB

Download