guloader | bf97fc4685ac1afb19e0a6815277622a90b4e3852cd29709f6fd619e4e3eafd1

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-10-2024 19:36

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General

Target

24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe
Size

44KB
MD5

24571a6437f3cbe7f8cea573aef6e9d6
SHA1

38669067f5df9d7c4decc16b5620ea1fa97694cf
SHA256

bf97fc4685ac1afb19e0a6815277622a90b4e3852cd29709f6fd619e4e3eafd1
SHA512

ef6ec2fc39a6b295848e4598352ffba0e3d24f2b3deeb5ce72ae28d1422b86589657fbbdcb538f23487ae013717ac12950b1d10d1700d9c7c0f19c777d3c0e1e
SSDEEP

768:t+UMDR+fWdeZ6bbo2H2NKRdW0swFc0P8dVr/:t+Uk+gPHJRdW0swbPEr/

Score

10^/10

guloader discovery downloader guloader persistence

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=1mK8LhnBsKo-Zn7Qnqp0FQO7GNxXp7Bq0

xor.base64

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Guloader payload 2 IoCs

guloader

resource	yara_rule
behavioral2/memory/2008-2-0x0000000000640000-0x0000000000648000-memory.dmp	family_guloader
behavioral2/memory/1516-4-0x0000000000A20000-0x0000000000B20000-memory.dmp	family_guloader

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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Dorerneunmis9 = "C:\\Users\\Admin\\SKILLE\\gstensrealis.exe"	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe
1516	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2008 set thread context of 1516	2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe	86

System Location Discovery: System Language Discovery 1 TTPs 2 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	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 1516	2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe	86
PID 2008 wrote to memory of 1516	2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe	86
PID 2008 wrote to memory of 1516	2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe	86
PID 2008 wrote to memory of 1516	2008	24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe	86

C:\Users\Admin\AppData\Local\Temp\24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2008
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\24571a6437f3cbe7f8cea573aef6e9d6_JaffaCakes118.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:1516

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

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1516-5-0x00000000775E1000-0x0000000077701000-memory.dmp

Filesize
1.1MB

Download
memory/1516-4-0x0000000000A20000-0x0000000000B20000-memory.dmp

Filesize
1024KB

Download
memory/1516-9-0x0000000000A20000-0x0000000000B20000-memory.dmp

Filesize
1024KB

Download
memory/2008-2-0x0000000000640000-0x0000000000648000-memory.dmp

Filesize
32KB

Download
memory/2008-3-0x00000000775E1000-0x0000000077701000-memory.dmp

Filesize
1.1MB

Download
memory/2008-7-0x0000000000640000-0x0000000000648000-memory.dmp

Filesize
32KB

Download
memory/2008-8-0x00000000775E1000-0x0000000077701000-memory.dmp

Filesize
1.1MB

Download
memory/2008-10-0x0000000000640000-0x0000000000648000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads