guloader | b3cc4e1f09aa77a31e7071f2a505bfe5f13f9ec3cb73997b0d4a5ac36fc710fa

Analysis

max time kernel
145s
max time network
155s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
24-12-2024 14:12

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General

Target

2019111211292579875_BankInfo.exe
Size

116KB
MD5

88eaf0228d3e91df53e98cc856460d58
SHA1

ff55b60f33dc532d3c3ead9efe2e44edf3e07b45
SHA256

115f68c5b3dcdd290f1aed783b1485915fda14f9840b132f519e9eb67c561e41
SHA512

062c26490796cef240aaced3a346d4ed55d32f91ef07f52b04eb9cd2a150d8e49774582a5f66b96c2e3394c63c84c94388a28959a95d2f63c136bf6e8e6d329f
SSDEEP

1536:Jl1cZnZjQkVjKSeRyfwLAY1DqOwvRyNnZjQkVjKSuTN1:JlKPUkVjKVROwJJBwvReUkVjKvR1

Score

10^/10

guloader discovery downloader guloader

Malware Config

Extracted

Family

guloader

https://drive.google.com/uc?export=download&id=1XjUHIgW5T6HcodhQNf4poqrFbSYVe2Qd

xor.base64

Signatures

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

Guloader payload 1 IoCs

guloader

resource	yara_rule
behavioral11/memory/2876-2-0x00000000002B0000-0x00000000002B8000-memory.dmp	family_guloader

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2876	2019111211292579875_BankInfo.exe
2800	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2876 set thread context of 2800	2876	2019111211292579875_BankInfo.exe	30

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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2019111211292579875_BankInfo.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2876	2019111211292579875_BankInfo.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2876	2019111211292579875_BankInfo.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30
PID 2876 wrote to memory of 2800	2876	2019111211292579875_BankInfo.exe	30

C:\Users\Admin\AppData\Local\Temp\2019111211292579875_BankInfo.exe
"C:\Users\Admin\AppData\Local\Temp\2019111211292579875_BankInfo.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:2876
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\2019111211292579875_BankInfo.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

memory/2800-5-0x0000000076E40000-0x0000000076FE9000-memory.dmp

Filesize
1.7MB

Download
memory/2876-2-0x00000000002B0000-0x00000000002B8000-memory.dmp

Filesize
32KB

Download
memory/2876-3-0x0000000076E41000-0x0000000076F42000-memory.dmp

Filesize
1.0MB

Download
memory/2876-4-0x0000000076E40000-0x0000000076FE9000-memory.dmp

Filesize
1.7MB

Download
memory/2876-24-0x00000000002B0000-0x00000000002B8000-memory.dmp

Filesize
32KB

Download
memory/2876-25-0x00000000002B0000-0x00000000002B8000-memory.dmp

Filesize
32KB

Download