guloader | 25c27fe3e60d30813db39f6297ad3a93c041b5a91426196719165f921516fe40

Analysis

max time kernel
149s
max time network
149s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
05-08-2024 14:33

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General

Target

MalwareBazaar.exe
Size

420KB
MD5

13bb9c026cd4fb9e1cfe7b60e439d74c
SHA1

e8c20d050338182b297ddb18781c68afd84ece98
SHA256

25c27fe3e60d30813db39f6297ad3a93c041b5a91426196719165f921516fe40
SHA512

67ad6d0800672083e24e8b7baa135a3646df21abeb848de4c5f2d47020a4771e1facf207ed529118f1d44b80a697e768992887c383d91d42ab58acd3fd174c3c
SSDEEP

6144:iXFKo5T7BEGTFo+zQkgWEgUE+DHuDS1Ufbuo+dxMG05GcbFVs+iUvZ68wZu+:iXHVTC+ckgr8Y0TfbSMGk0R6+

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2096	MalwareBazaar.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2096	MalwareBazaar.exe
2592	MalwareBazaar.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2096 set thread context of 2592	2096	MalwareBazaar.exe	30

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\outcrowd\giderne.ini	MalwareBazaar.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 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	MalwareBazaar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MalwareBazaar.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2096	MalwareBazaar.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2096 wrote to memory of 2592	2096	MalwareBazaar.exe	30
PID 2096 wrote to memory of 2592	2096	MalwareBazaar.exe	30
PID 2096 wrote to memory of 2592	2096	MalwareBazaar.exe	30
PID 2096 wrote to memory of 2592	2096	MalwareBazaar.exe	30
PID 2096 wrote to memory of 2592	2096	MalwareBazaar.exe	30
PID 2096 wrote to memory of 2592	2096	MalwareBazaar.exe	30

C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
"C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.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:2096
- C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe
  "C:\Users\Admin\AppData\Local\Temp\MalwareBazaar.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nso3747.tmp\System.dll

Filesize
12KB

MD5
4add245d4ba34b04f213409bfe504c07

SHA1
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09

SHA256
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706

SHA512
1bd260cabe5ea3cefbbc675162f30092ab157893510f45a1b571489e03ebb2903c55f64f89812754d3fe03c8f10012b8078d1261a7e73ac1f87c82f714bce03d

Download Submit
memory/2096-17-0x00000000040A0000-0x0000000005771000-memory.dmp

Filesize
22.8MB

Download
memory/2096-18-0x0000000077B91000-0x0000000077C92000-memory.dmp

Filesize
1.0MB

Download
memory/2096-19-0x0000000077B90000-0x0000000077D39000-memory.dmp

Filesize
1.7MB

Download
memory/2096-21-0x00000000040A0000-0x0000000005771000-memory.dmp

Filesize
22.8MB

Download
memory/2096-28-0x00000000040A0000-0x0000000005771000-memory.dmp

Filesize
22.8MB

Download
memory/2592-20-0x0000000077B90000-0x0000000077D39000-memory.dmp

Filesize
1.7MB

Download
memory/2592-22-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download