guloader | ae89fa61451250c7e7536745389b781adaa8ac9105e620061942f2de04308ddc

General

Target

Naskenovaný seznam položek č. 74245.vbs
Size

1.2MB
MD5

66ccc86e92b90555bef9ec7f4281cc8b
SHA1

8ef7f0bec3beb48df154b350cae7729df9e3cb74
SHA256

6e435f3a080733d5733beb10fd0d45f8530f9f5ebf8367ff1b4daf56d0106dc3
SHA512

89d225f726add2f44a33a8dd85ceb89a2fd6e526586e079ad62247659766337367888376f0d44b1eb936103ca0d499a59c6fb11a3aeb9fe3e60e7c72ed218b2e
SSDEEP

24576:aYQfEcXSFMuTGp2jdvB8S+QrShBYxfcFme3Frt0yOL09jFxzUA8cP51Xq:AccYMx7h6kuQq

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3184	temp_executable.exe

Loads dropped DLL 2 IoCs

pid	Process
3184	temp_executable.exe
1892	temp_executable.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
1892	temp_executable.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3184	temp_executable.exe
1892	temp_executable.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3184 set thread context of 1892	3184	temp_executable.exe	83

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

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe
1892	temp_executable.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3184	temp_executable.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 3184	4224	WScript.exe	82
PID 4224 wrote to memory of 3184	4224	WScript.exe	82
PID 4224 wrote to memory of 3184	4224	WScript.exe	82
PID 3184 wrote to memory of 1892	3184	temp_executable.exe	83
PID 3184 wrote to memory of 1892	3184	temp_executable.exe	83
PID 3184 wrote to memory of 1892	3184	temp_executable.exe	83
PID 3184 wrote to memory of 1892	3184	temp_executable.exe	83
PID 3184 wrote to memory of 1892	3184	temp_executable.exe	83

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Naskenovaný seznam položek č. 74245.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4224
- C:\Users\Admin\AppData\Local\Temp\temp_executable.exe
  "C:\Users\Admin\AppData\Local\Temp\temp_executable.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3184
- - C:\Users\Admin\AppData\Local\Temp\temp_executable.exe
    "C:\Users\Admin\AppData\Local\Temp\temp_executable.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsr71B6.tmp\System.dll

Filesize
12KB

MD5
d6f54d2cefdf58836805796f55bfc846

SHA1
b980addc1a755b968dd5799179d3b4f1c2de9d2d

SHA256
f917aef484d1fbb4d723b2e2d3045cb6f5f664e61fbb3d5c577bd1c215de55d9

SHA512
ce67da936a93d46ef7e81abc8276787c82fd844c03630ba18afc3528c7e420c3228bfe82aeda083bb719f2d1314afae913362abd1e220cb364606519690d45db

Download Submit
C:\Users\Admin\AppData\Local\Temp\temp_executable.exe

Filesize
811KB

MD5
c9b895e1253aa2b7147be9b1e43f2dbd

SHA1
9ef2d92e0917b65dee0a3d45872be70992ac0882

SHA256
c087b6b42ea2fa23894c1e4928d7eb6d312f4769635bfb9b22ef23a09444fa0d

SHA512
b3493b7c9ba0e88319bf2a413c53873ab5cc8d9d1b7155fae907d41facd2a959fed68f5a84ae044406cc3f7143d9294c16274ce7e182b723cc55cdae91399601

Download Submit
memory/1892-27-0x00000000016F0000-0x00000000022B6000-memory.dmp

Filesize
11.8MB

Download
memory/1892-33-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1892-36-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1892-37-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/1892-40-0x0000000000490000-0x00000000016E4000-memory.dmp

Filesize
18.3MB

Download
memory/3184-24-0x0000000003100000-0x0000000003CC6000-memory.dmp

Filesize
11.8MB

Download
memory/3184-25-0x0000000077D61000-0x0000000077E81000-memory.dmp

Filesize
1.1MB

Download
memory/3184-26-0x0000000075205000-0x0000000075206000-memory.dmp

Filesize
4KB

Download
memory/3184-29-0x0000000003100000-0x0000000003CC6000-memory.dmp

Filesize
11.8MB

Download
memory/3184-35-0x0000000003100000-0x0000000003CC6000-memory.dmp

Filesize
11.8MB

Download

Analysis

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