guloader | c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
04/02/2025, 04:39

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General

Target

c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
Size

929KB
MD5

86df9c1467eb9d8a9a383562e9c17d5c
SHA1

904bc088bb47fb15611b0f065d0397a81eb8056d
SHA256

c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb
SHA512

4352e804856a6e9c8db13e05f46c4deac7addd0473bf1e002b67e81aff5577fc37322f4a097808687fd4ab8f0b272a4eede066803e4bfa17c0363bead8447fa7
SSDEEP

24576:OQLnHw/PgJwl9t0vF1b9hxe28SZKcAlSjulSjGeHevO:nLnQ/4fDpXeNSZKHRvO

Score

10^/10

guloader discovery downloader persistence

Malware Config

Signatures

Guloader family
guloader
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	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe

Loads dropped DLL 7 IoCs

pid	Process
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.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-1-5-21-1412605595-2147700071-3468511006-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Preprohibition = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Gennys\\Muffediser.exe"	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
916	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3260 set thread context of 916	3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe	92

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Verpa231.Tra85	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.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	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 3260 wrote to memory of 916	3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe	92
PID 3260 wrote to memory of 916	3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe	92
PID 3260 wrote to memory of 916	3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe	92
PID 3260 wrote to memory of 916	3260	c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe	92

C:\Users\Admin\AppData\Local\Temp\c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
"C:\Users\Admin\AppData\Local\Temp\c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe"
1⤵
- Checks QEMU agent file
- 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:3260
- C:\Users\Admin\AppData\Local\Temp\c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe
  "C:\Users\Admin\AppData\Local\Temp\c386f2ccd7b71e4b2e3cd41265127a03edbc5a214cb3a426310df9cf4e6638bb.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:916

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsh7263.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/916-47-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/916-48-0x0000000001660000-0x000000000438B000-memory.dmp

Filesize
45.2MB

Download
memory/916-50-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/916-51-0x0000000001660000-0x000000000438B000-memory.dmp

Filesize
45.2MB

Download
memory/3260-43-0x0000000004A20000-0x000000000774B000-memory.dmp

Filesize
45.2MB

Download
memory/3260-44-0x0000000004A20000-0x000000000774B000-memory.dmp

Filesize
45.2MB

Download
memory/3260-45-0x00000000770F1000-0x0000000077211000-memory.dmp

Filesize
1.1MB

Download
memory/3260-46-0x0000000073F54000-0x0000000073F55000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads