guloader | 6876aa707adeeffbe08d86d26c6cf48b8d77d46c96f8ace28a523b0a846db38f

Analysis

max time kernel
142s
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
26/09/2024, 15:59

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General

Target

f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
Size

40KB
MD5

f8b85f347a71a59f7f00ae7532f2c18b
SHA1

b6550c39499503580dfa3f495dfd6676bb59bae9
SHA256

6876aa707adeeffbe08d86d26c6cf48b8d77d46c96f8ace28a523b0a846db38f
SHA512

af4dd63b8b0d2ff4648b2860f39750a3f8255b0f40f13a7547d85765b2e8d2968927f510654511416f17c7e98d621f78e0843d822b6060bba9affb4d6d55262e
SSDEEP

384:VKR02k9t1VvgETLVj34wFWU9XqVCfSPqCg8eQ3HY5W8X23:VKRFk9TTLGwtCCfgg8eQ3HGX2

Score

10^/10

guloader discovery downloader

Malware Config

Extracted

Family

guloader

https://onedrive.live.com/download?cid=4C3F5C65A99DA195&resid=4C3F5C65A99DA195%21195&authkey=AJB0IkxVDYstJY0

xor.base64

Signatures

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

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
2144	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4508 set thread context of 2144	4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	89

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	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4508 wrote to memory of 2144	4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	89
PID 4508 wrote to memory of 2144	4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	89
PID 4508 wrote to memory of 2144	4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	89
PID 4508 wrote to memory of 2144	4508	f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe	89

C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe"
1⤵
- Checks QEMU agent file
- 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:4508
- C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\f8b85f347a71a59f7f00ae7532f2c18b_JaffaCakes118.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2144

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1388,i,3861745594156495651,17595114179815238301,262144 --variations-seed-version --mojo-platform-channel-handle=4372 /prefetch:8
1⤵
PID:224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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

memory/2144-4-0x0000000000400000-0x000000000055D000-memory.dmp

Filesize
1.4MB

Download
memory/2144-7-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2144-11-0x0000000000560000-0x0000000000660000-memory.dmp

Filesize
1024KB

Download
memory/2144-12-0x0000000000400000-0x000000000055D000-memory.dmp

Filesize
1.4MB

Download
memory/4508-2-0x00000000022D0000-0x00000000022D9000-memory.dmp

Filesize
36KB

Download
memory/4508-3-0x0000000077611000-0x0000000077731000-memory.dmp

Filesize
1.1MB

Download
memory/4508-6-0x00000000022D0000-0x00000000022D9000-memory.dmp

Filesize
36KB

Download