guloader | 27d318fe5d1d8f02c39b6b82690e4be83eeb3f357618cbabd7d808a23924b277

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
19/09/2024, 01:32

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General

Target

ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
Size

80KB
MD5

ea58a2d052aaee30b19a34048ce04066
SHA1

29cca773cb11097d127ba5ddb2d6ca69c462aa21
SHA256

27d318fe5d1d8f02c39b6b82690e4be83eeb3f357618cbabd7d808a23924b277
SHA512

da89be0fc56778b3a5a0d7efc66f51a38ef7de963e29c9e6fc6e73ce9af8972d818462720e5b017b214f6ddbc9d1d7e27213fa9273a425f2ec8365d4f5040e54
SSDEEP

1536:EV69BrIP08K0mkNjU42WGFAxUdw7sXVi:j7IP7TDhH2WNWw7Z

Score

10^/10

guloader discovery downloader guloader

Malware Config

Extracted

Family

guloader

https://mwrc.ca/a/me_encrypted_3F1DDE0.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/4616-2-0x00000000021E0000-0x00000000021EA000-memory.dmp	family_guloader
behavioral2/memory/2736-4-0x0000000000E20000-0x0000000000F20000-memory.dmp	family_guloader

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
2736	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4616 set thread context of 2736	4616	ea58a2d052aaee30b19a34048ce04066_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	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4616 wrote to memory of 2736	4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	82
PID 4616 wrote to memory of 2736	4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	82
PID 4616 wrote to memory of 2736	4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	82
PID 4616 wrote to memory of 2736	4616	ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe	82

C:\Users\Admin\AppData\Local\Temp\ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\ea58a2d052aaee30b19a34048ce04066_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:4616
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\ea58a2d052aaee30b19a34048ce04066_JaffaCakes118.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2736

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

Exfiltration

Impact

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Downloads

memory/2736-5-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/2736-4-0x0000000000E20000-0x0000000000F20000-memory.dmp

Filesize
1024KB

Download
memory/4616-2-0x00000000021E0000-0x00000000021EA000-memory.dmp

Filesize
40KB

Download
memory/4616-3-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/4616-9-0x00000000021E0000-0x00000000021EA000-memory.dmp

Filesize
40KB

Download
memory/4616-10-0x00000000775A1000-0x00000000776C1000-memory.dmp

Filesize
1.1MB

Download
memory/4616-11-0x00000000021E0000-0x00000000021EA000-memory.dmp

Filesize
40KB

Download