guloader | 11965b0ef90eb8c16c93aa0a141c6c96cb74d71f4a069bb76d18e1cb1e3347c1

General

Target

11965b0ef90eb8c16c93aa0a141c6c96cb74d71f4a069bb76d18e1cb1e3347c1.vbs
Size

1.6MB
MD5

d0be1e1b67cf387257e3dea947ed49e8
SHA1

e16222b612d74c888cc8357d1e2352ea2d8939a3
SHA256

11965b0ef90eb8c16c93aa0a141c6c96cb74d71f4a069bb76d18e1cb1e3347c1
SHA512

5a8c8920e1ebd061fd32e1215dafaef6765ca00cc1446b29dc3a9b77fd4280c509fe2e4b4b21f46cc463f661c90f9fb08d06b81db96c3ebb547e9f382c6dbf56
SSDEEP

24576:2Eeps6dHJFR2QlXTu3AoZBn7aw6ccWtxSX3KAHSK:0s6dt8x7r5cv

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-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3760	x.exe

Loads dropped DLL 2 IoCs

pid	Process
3760	x.exe
1552	x.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3760	x.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3760 set thread context of 1552	3760	x.exe	87

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\sorteringsordenens.lnk	x.exe
File opened for modification	C:\Program Files (x86)\sorteringsordenens.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

NSIS installer 2 IoCs

installer

resource	yara_rule
behavioral2/files/0x0008000000023497-4.dat	nsis_installer_1
behavioral2/files/0x0008000000023497-4.dat	nsis_installer_2

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3760	x.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3304 wrote to memory of 3760	3304	WScript.exe	82
PID 3304 wrote to memory of 3760	3304	WScript.exe	82
PID 3304 wrote to memory of 3760	3304	WScript.exe	82
PID 3760 wrote to memory of 1552	3760	x.exe	87
PID 3760 wrote to memory of 1552	3760	x.exe	87
PID 3760 wrote to memory of 1552	3760	x.exe	87
PID 3760 wrote to memory of 1552	3760	x.exe	87
PID 3760 wrote to memory of 1552	3760	x.exe	87

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\11965b0ef90eb8c16c93aa0a141c6c96cb74d71f4a069bb76d18e1cb1e3347c1.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3304
- 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 Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3760
- - C:\Users\Admin\AppData\Local\Temp\x.exe
    "C:\Users\Admin\AppData\Local\Temp\x.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    PID:1552

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:\Program Files (x86)\sorteringsordenens.lnk

Filesize
906B

MD5
b6e91048136ff53f6a0cbe5350f6763f

SHA1
4421a4f60c2b56eb5037bcf5cebfd9f7d1f0f63f

SHA256
7b3cab50924c040b6f4d718ce1645a44e048c93e66f8560b2b43d668c6f5bc65

SHA512
b1155364de13484ac7a22310144ca4370bdcb0e0cc1233614bfe2fce9e5033dda3a156a2d093351d2d11e23643db0976dd9731d413eb4e1328fb76205a32e259

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsy81E3.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

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

Filesize
1.0MB

MD5
4648a0278bd003c324fcd7e7779dcf99

SHA1
401623540094e2eef531d366d8c155c1d3d72abb

SHA256
49260a07ff0d5c06efdfc3985bcc44d6df5cf2a56810f01c3243684b950264cc

SHA512
198d5db4bb4f612645786c27cdacb26665db4099cd8580091adf86d9d84fc16278d3a87c410912cb4968c630dca1cc14432551673fb7653ad83f28b601720da5

Download Submit
memory/1552-297-0x0000000001710000-0x0000000002E75000-memory.dmp

Filesize
23.4MB

Download
memory/1552-301-0x00000000004B0000-0x0000000001704000-memory.dmp

Filesize
18.3MB

Download
memory/1552-302-0x00000000004B0000-0x0000000001704000-memory.dmp

Filesize
18.3MB

Download
memory/1552-305-0x00000000004B0000-0x0000000001704000-memory.dmp

Filesize
18.3MB

Download
memory/3760-294-0x00000000028E0000-0x0000000004045000-memory.dmp

Filesize
23.4MB

Download
memory/3760-295-0x0000000077C01000-0x0000000077D21000-memory.dmp

Filesize
1.1MB

Download
memory/3760-296-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3760-299-0x00000000028E0000-0x0000000004045000-memory.dmp

Filesize
23.4MB

Download
memory/3760-300-0x00000000028E0000-0x0000000004045000-memory.dmp

Filesize
23.4MB

Download

Analysis

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