guloader | b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c

General

Target

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
Size

672KB
MD5

3a839bf48b4672cea07c7d5f49f70f8d
SHA1

d4ac0b8f932bc67d0eac1f75a49339136921b1d4
SHA256

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c
SHA512

15461440c8dc6a6d966fcade3381f4c94c34d2acdd38f5fa6a7925589a18c5c430ffc88c084ab5c602a6dce725d3b400b8481c3fbcc3da4cc22ea5d10742394a
SSDEEP

12288:JiNLrUt25WKlGHlkn+Ff6AUeLZAyCOE5PNW0FLTrx:JiNAtiWKlGO+FEemy85V9Fzx

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
Loads dropped DLL 1 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

pid process

4796 b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

msiexec.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Burghmaster = "C:\\Users\\Admin\\AppData\\Roaming\\Pseudotrimera\\Trafikministeriet.exe"	msiexec.exe

Blocklisted process makes network request 2 IoCs

Processes:

msiexec.exe

flow pid process

20 3044 msiexec.exe
21 3044 msiexec.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exemsiexec.exe

pid process

4796 b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
3044 msiexec.exe

flow	pid	process
20	3044	msiexec.exe
21	3044	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

description	pid	process	target process
PID 4796 set thread context of 3044	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.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

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exemsiexec.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

pid	process
4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

description	pid	process	target process
PID 4796 wrote to memory of 4116	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 4116	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 4116	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 3044	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 3044	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 3044	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 3044	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 4796 wrote to memory of 3044	4796	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe

C:\Users\Admin\AppData\Local\Temp\b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
"C:\Users\Admin\AppData\Local\Temp\b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe"
1⤵
- 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:4796
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Users\Admin\AppData\Local\Temp\b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe"
  2⤵
  PID:4116
- C:\Windows\SysWOW64\msiexec.exe
  "C:\Users\Admin\AppData\Local\Temp\b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe"
  2⤵
  - Adds Run key to start application
  - Blocklisted process makes network request
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsvADF4.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
C:\Users\Admin\arecoline.lnk

Filesize
942B

MD5
02236582591dee5de2128add2e65499f

SHA1
adfdf5c248b0f5055e4d9cc38750449d0f1ecc91

SHA256
99ab39c6bbf5b9045571632969fef523657bb3a54089d203334a7da88138c7f7

SHA512
627253119280852bca166dd8d689dcb3460666aa4563bb52fa303544847d255835f51b8af49aa05e2a66e312bef959a7447d512e4d088a94e331311333ab495e

Download Submit
memory/3044-21-0x0000000000C00000-0x0000000003613000-memory.dmp

Filesize
42.1MB

Download
memory/3044-23-0x0000000000400000-0x00000000005E4000-memory.dmp

Filesize
1.9MB

Download
memory/3044-24-0x0000000000C00000-0x0000000003613000-memory.dmp

Filesize
42.1MB

Download
memory/4796-15-0x0000000004BC0000-0x00000000075D3000-memory.dmp

Filesize
42.1MB

Download
memory/4796-16-0x0000000076F71000-0x0000000077091000-memory.dmp

Filesize
1.1MB

Download
memory/4796-17-0x0000000073DD5000-0x0000000073DD6000-memory.dmp

Filesize
4KB

Download
memory/4796-19-0x0000000073DD0000-0x0000000073DD7000-memory.dmp

Filesize
28KB

Download
memory/4796-18-0x0000000004BC0000-0x00000000075D3000-memory.dmp

Filesize
42.1MB

Download
memory/4796-20-0x0000000004BC0000-0x00000000075D3000-memory.dmp

Filesize
42.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads