guloader | 7984d85806d611e8d7e3ec5640186ebce9b1daccbd07a4bbda0fc6e0e5666299

Analysis

max time kernel
145s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 02:16

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General

Target

242fb5498503fdae24861ca26f762745.exe
Size

188KB
MD5

242fb5498503fdae24861ca26f762745
SHA1

e45e4180137ea7c9d81f127fac0af48cf3b4e8d7
SHA256

7984d85806d611e8d7e3ec5640186ebce9b1daccbd07a4bbda0fc6e0e5666299
SHA512

5717a9d38ff151384fe522b5b55f7a4882bcb897d65d1c9fbd0b155f05138cc698db39805d34150daf5260906d8e09d6d752190e7d681eb181eb3569378a48fd
SSDEEP

3072:F+ogFpSWSqqbZ0ZEuwGE5pwFGHiG1InFGHiPZEuwGE5p:F+7AtqqbZFfGE5pakipkiufGE5p

Score

10^/10

guloader downloader persistence

Malware Config

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	242fb5498503fdae24861ca26f762745.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ieinstal.exe

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-1-5-21-1232405761-1209240240-3206092754-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SPINTOS = "C:\\Users\\Admin\\AppData\\Local\\Temp\\posekiggerne\\optrner.exe"	ieinstal.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5028	242fb5498503fdae24861ca26f762745.exe
1620	ieinstal.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5028 set thread context of 1620	5028	242fb5498503fdae24861ca26f762745.exe	96

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
5028	242fb5498503fdae24861ca26f762745.exe
5028	242fb5498503fdae24861ca26f762745.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5028	242fb5498503fdae24861ca26f762745.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 5028 wrote to memory of 448	5028	242fb5498503fdae24861ca26f762745.exe	95
PID 5028 wrote to memory of 448	5028	242fb5498503fdae24861ca26f762745.exe	95
PID 5028 wrote to memory of 448	5028	242fb5498503fdae24861ca26f762745.exe	95
PID 5028 wrote to memory of 1620	5028	242fb5498503fdae24861ca26f762745.exe	96
PID 5028 wrote to memory of 1620	5028	242fb5498503fdae24861ca26f762745.exe	96
PID 5028 wrote to memory of 1620	5028	242fb5498503fdae24861ca26f762745.exe	96
PID 5028 wrote to memory of 1620	5028	242fb5498503fdae24861ca26f762745.exe	96

C:\Users\Admin\AppData\Local\Temp\242fb5498503fdae24861ca26f762745.exe
"C:\Users\Admin\AppData\Local\Temp\242fb5498503fdae24861ca26f762745.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:5028
- C:\Program Files (x86)\internet explorer\ieinstal.exe
  "C:\Users\Admin\AppData\Local\Temp\242fb5498503fdae24861ca26f762745.exe"
  2⤵
  PID:448
- C:\Program Files (x86)\internet explorer\ieinstal.exe
  "C:\Users\Admin\AppData\Local\Temp\242fb5498503fdae24861ca26f762745.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:1620

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1620-5-0x00000000008A0000-0x00000000009A0000-memory.dmp

Filesize
1024KB

Download
memory/1620-6-0x00000000008A0000-0x00000000009A0000-memory.dmp

Filesize
1024KB

Download
memory/1620-8-0x00000000778E1000-0x0000000077A01000-memory.dmp

Filesize
1.1MB

Download
memory/1620-10-0x00000000008A0000-0x00000000009A0000-memory.dmp

Filesize
1024KB

Download
memory/5028-2-0x00000000020F0000-0x0000000002106000-memory.dmp

Filesize
88KB

Download
memory/5028-3-0x00000000778E1000-0x0000000077A01000-memory.dmp

Filesize
1.1MB

Download
memory/5028-4-0x00000000778E1000-0x0000000077A01000-memory.dmp

Filesize
1.1MB

Download
memory/5028-7-0x00000000020F0000-0x0000000002106000-memory.dmp

Filesize
88KB

Download
memory/5028-11-0x00000000020F0000-0x0000000002106000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads