guloader | 71ec163d5f29bc3f95fd641d2de133e194a465f96802ee5e242b0fd7b51ed0c0

Analysis

max time kernel
301s
max time network
293s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
15/05/2023, 14:06

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General

Target

378106.exe
Size

542KB
MD5

9abb12335ad8e25669dc5b68346d3cde
SHA1

8155e52099a9018d36c6381f5a4b4b6f920eb6c2
SHA256

71ec163d5f29bc3f95fd641d2de133e194a465f96802ee5e242b0fd7b51ed0c0
SHA512

e2e2c0fffa475c35aba63aa4e240e36da2979f01830ad3c0e2fb1a0063223b6a559578a69782266271ff33b6bc5e9cc019dc38347ed7c977811d5b63cd7b1af4
SSDEEP

12288:wSz60hBhXZdHcgZX8Ldg07jVHit/W7YDoii2OnGa4Jyx:wSz60hBpPnKjVHeWsMii2jalx

Score

10^/10

guloader downloader

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	378106.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	378106.exe

Loads dropped DLL 2 IoCs

pid	Process
4948	378106.exe
4948	378106.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
4796	378106.exe
4796	378106.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4948	378106.exe
4796	378106.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4948 set thread context of 4796	4948	378106.exe	92

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4948	378106.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4948 wrote to memory of 4796	4948	378106.exe	92
PID 4948 wrote to memory of 4796	4948	378106.exe	92
PID 4948 wrote to memory of 4796	4948	378106.exe	92
PID 4948 wrote to memory of 4796	4948	378106.exe	92

C:\Users\Admin\AppData\Local\Temp\378106.exe
"C:\Users\Admin\AppData\Local\Temp\378106.exe"
1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4948
- C:\Users\Admin\AppData\Local\Temp\378106.exe
  "C:\Users\Admin\AppData\Local\Temp\378106.exe"
  2⤵
  - Checks QEMU agent file
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:4796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

C:\Users\Admin\AppData\Local\Temp\nstC441.tmp\System.dll

Filesize
11KB

MD5
b0c77267f13b2f87c084fd86ef51ccfc

SHA1
f7543f9e9b4f04386dfbf33c38cbed1bf205afb3

SHA256
a0cac4cf4852895619bc7743ebeb89f9e4927ccdb9e66b1bcd92a4136d0f9c77

SHA512
f2b57a2eea00f52a3c7080f4b5f2bb85a7a9b9f16d12da8f8ff673824556c62a0f742b72be0fd82a2612a4b6dbd7e0fdc27065212da703c2f7e28d199696f66e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nstC441.tmp\System.dll

Filesize
11KB

MD5
b0c77267f13b2f87c084fd86ef51ccfc

SHA1
f7543f9e9b4f04386dfbf33c38cbed1bf205afb3

SHA256
a0cac4cf4852895619bc7743ebeb89f9e4927ccdb9e66b1bcd92a4136d0f9c77

SHA512
f2b57a2eea00f52a3c7080f4b5f2bb85a7a9b9f16d12da8f8ff673824556c62a0f742b72be0fd82a2612a4b6dbd7e0fdc27065212da703c2f7e28d199696f66e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nstC441.tmp\System.dll

Filesize
11KB

MD5
b0c77267f13b2f87c084fd86ef51ccfc

SHA1
f7543f9e9b4f04386dfbf33c38cbed1bf205afb3

SHA256
a0cac4cf4852895619bc7743ebeb89f9e4927ccdb9e66b1bcd92a4136d0f9c77

SHA512
f2b57a2eea00f52a3c7080f4b5f2bb85a7a9b9f16d12da8f8ff673824556c62a0f742b72be0fd82a2612a4b6dbd7e0fdc27065212da703c2f7e28d199696f66e

Download Submit
memory/4796-151-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/4796-152-0x0000000001660000-0x0000000003050000-memory.dmp

Filesize
25.9MB

Download
memory/4796-153-0x0000000001660000-0x0000000003050000-memory.dmp

Filesize
25.9MB

Download
memory/4796-154-0x0000000001660000-0x0000000003050000-memory.dmp

Filesize
25.9MB

Download
memory/4796-155-0x0000000001660000-0x0000000003050000-memory.dmp

Filesize
25.9MB

Download
memory/4948-149-0x0000000003340000-0x0000000004D30000-memory.dmp

Filesize
25.9MB

Download
memory/4948-150-0x0000000003340000-0x0000000004D30000-memory.dmp

Filesize
25.9MB

Download