guloader | cadf0601dc656d783b7bc3d1791387c68cc49ec44f6370bb5b2cf4b87243e4c4

Analysis

max time kernel
149s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27/08/2024, 15:18

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General

Target
Zahteva za ponudbo – Katalog vzorcev.vbs
Size 1007KB
Sample240827-splwqsyfjp
SHA256 cadf0601dc656d783b7bc3d1791387c68cc49ec44f6370bb5b2cf4b87243e4c4
MD5 2796418c211c6b84cb5787928fffe6ce
SHA1 d9a531b05727f631996a6190a503e4745f77d2c2
SHA512 9d9840a7651f5ada9bf1cd45bbb87dd6116873169ee2e74de2168a81bb4b5c2fe222182f4bd6f1e8f9d94e130d9ce186c2914fc8379071e5915396e48589ba71
SSDEEP 12288:tE3zrmpXGXE7x+1/HDzsnLhN7OHlpH838q0MJS4xvHmWTgkvpHmpFr7YcHFGLzP5:YONGq01/Hmr7uxcpzZpHaucHFSi1oAI
MD5 SHA1 SHA512 SSDEEP

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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3524	x.exe

Loads dropped DLL 2 IoCs

pid	Process
3524	x.exe
532	x.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
532	x.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3524	x.exe
532	x.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3524 set thread context of 532	3524	x.exe	88

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\hjemmehjlpen.lnk	x.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	x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	x.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe
532	x.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3524	x.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2664 wrote to memory of 3524	2664	WScript.exe	84
PID 2664 wrote to memory of 3524	2664	WScript.exe	84
PID 2664 wrote to memory of 3524	2664	WScript.exe	84
PID 3524 wrote to memory of 532	3524	x.exe	88
PID 3524 wrote to memory of 532	3524	x.exe	88
PID 3524 wrote to memory of 532	3524	x.exe	88
PID 3524 wrote to memory of 532	3524	x.exe	88
PID 3524 wrote to memory of 532	3524	x.exe	88

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Zahteva za ponudbo – Katalog vzorcev.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2664
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.exe"
  2⤵
  - Executes dropped EXE
  - 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:3524
- - C:\Users\Admin\AppData\Local\Temp\x.exe
    "C:\Users\Admin\AppData\Local\Temp\x.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:532

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

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nstA876.tmp\System.dll
Size 11KB
SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
MD5 9625d5b1754bc4ff29281d415d27a0fd
SHA1 80e85afc5cccd4c0a3775edbb90595a1a59f5ce0
SHA512 dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b
SSDEEP 192:eX24sihno00Wfl97nH6BenXwWobpWBTtvShJ5omi7dJWjOlqSlS:D8QIl972eXqlWBFSt273YOlqz
MD5 SHA1 SHA512 SSDEEP

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x.exe

Path C:\Users\Admin\AppData\Local\Temp\x.exe
Size 650KB
SHA256 24474d41dd1cd14129e01ae130e7152badb85c79b7d8a48077c58cc42e7be733
MD5 1f6168ff778b08d1e0cdb8a64330fc3f
SHA1 4dd8fb7c9b13e74a2b265a02fa5f0b6a63b51a6d
SHA512 6d2c3a7bace6893cf7c2388d45755a06b88d85fb813cdc148ca79b0f316d03510eb3021040bd06543ddf18cc18ac1994ffb09ccb507368a7bfbdd2a5f680d905
SSDEEP 12288:b6559HtdMLR8N+J8Q3Fj4tse3KuQVM9RWOAeDAC/nymEqoO:avoR2+qJD3KFVM9RW9nmj1
MD5 SHA1 SHA512 SSDEEP

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memory/532-33-0x0000000000810000-0x0000000001A64000-memory.dmp

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memory/532-41-0x0000000000810000-0x0000000001A64000-memory.dmp

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memory/532-38-0x0000000000810000-0x0000000001A64000-memory.dmp

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memory/532-37-0x0000000000810000-0x0000000001A64000-memory.dmp

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memory/532-34-0x0000000000810000-0x0000000001A64000-memory.dmp

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memory/3524-27-0x0000000076EA1000-0x0000000076FC1000-memory.dmp

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memory/3524-28-0x0000000010004000-0x0000000010005000-memory.dmp

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memory/3524-36-0x0000000002C20000-0x0000000005614000-memory.dmp

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memory/3524-26-0x0000000076EA1000-0x0000000076FC1000-memory.dmp

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memory/3524-25-0x0000000002C20000-0x0000000005614000-memory.dmp

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memory/3524-24-0x0000000002C20000-0x0000000005614000-memory.dmp

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