guloader | afb42e7a147dd23b1d2066bea53aea0e6f33bcd4751afc835df327b2436542e0

Analysis

max time kernel
140s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25/09/2024, 22:24

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General

Target

f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe
Size

64KB
MD5

f6f94bb93ac1d68cb13e2a9d3392f13d
SHA1

4a2dbe985aa6e34e51aa6e431994ee07dbe13bdd
SHA256

afb42e7a147dd23b1d2066bea53aea0e6f33bcd4751afc835df327b2436542e0
SHA512

80538894abd107a3838a863922d43a431418d52a94a45e2738ee1b84f39cadd0a1c291a017b5be2585e9c33f38ce527e0afe3db60680416a57670de4b856eef6
SSDEEP

768:H0QEsl7YC/UdJkgLedN4abfHe2bc8oztlkRomyeM/WETv:H0QrpY1kiDcvr6w1Mlv

Score

10^/10

guloader discovery downloader guloader persistence

Malware Config

Extracted

Family

guloader

http://bondbuild.com.sg/wp-includes/tmpNST-corpORIGIN_encrypted_76E8820.bin

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/2260-2-0x00000000022C0000-0x00000000022C8000-memory.dmp	family_guloader
behavioral2/memory/916-4-0x0000000000D90000-0x0000000000E90000-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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Startup key = "C:\\Users\\Admin\\subfolder1\\filename1.exe"	RegAsm.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe
916	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2260 set thread context of 916	2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe	82

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	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2260 wrote to memory of 916	2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe	82
PID 2260 wrote to memory of 916	2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe	82
PID 2260 wrote to memory of 916	2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe	82
PID 2260 wrote to memory of 916	2260	f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe	82

C:\Users\Admin\AppData\Local\Temp\f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f6f94bb93ac1d68cb13e2a9d3392f13d_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:2260
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\f6f94bb93ac1d68cb13e2a9d3392f13d_JaffaCakes118.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:916

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/916-4-0x0000000000D90000-0x0000000000E90000-memory.dmp

Filesize
1024KB

Download
memory/916-5-0x0000000077D41000-0x0000000077E61000-memory.dmp

Filesize
1.1MB

Download
memory/2260-2-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/2260-3-0x0000000077D41000-0x0000000077E61000-memory.dmp

Filesize
1.1MB

Download
memory/2260-10-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/2260-11-0x0000000077D41000-0x0000000077E61000-memory.dmp

Filesize
1.1MB

Download
memory/2260-12-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads