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

2236 b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

pid	process
2236	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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Burghmaster = "C:\\Users\\Admin\\AppData\\Roaming\\Pseudotrimera\\Trafikministeriet.exe"	msiexec.exe

Blocklisted process makes network request 12 IoCs

Processes:

msiexec.exe

flow	pid	process
5	2884	msiexec.exe
7	2884	msiexec.exe
8	2884	msiexec.exe
9	2884	msiexec.exe
10	2884	msiexec.exe
11	2884	msiexec.exe
12	2884	msiexec.exe
13	2884	msiexec.exe
14	2884	msiexec.exe
15	2884	msiexec.exe
16	2884	msiexec.exe
17	2884	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exemsiexec.exe

pid process

2236 b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
2884 msiexec.exe

pid	process
2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe
2884	msiexec.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

description	pid	process	target process
PID 2236 set thread context of 2884	2236	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 1 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

pid process

2236 b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

pid	process
2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe

description	pid	process	target process
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	b2289f30e7ca8d3b6fadabba406a2071fbdb318ddfe1f06389e5295775cc8d7c.exe	msiexec.exe
PID 2236 wrote to memory of 2884	2236	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:2236
- 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:2884

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab5756.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5788.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

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

Filesize
926B

MD5
b23e947e956e9da6304373da3b301c86

SHA1
63c8c1626c7df7a0b4a88bebc9d5ca8a24a08ade

SHA256
612045c14ac1edaca4838357bd1bf73bc0b12627fb331ccc454b4130598c8054

SHA512
9ddfa4508143e92af108f912087688d5f2077d136957101eda47a13d10953754bd72d15bdf097a06d5b5c78ffeb8b3a15fbff63b9d5745c28d4e10f541a3080d

Download Submit
\Users\Admin\AppData\Local\Temp\nseC331.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
memory/2236-16-0x0000000003A40000-0x0000000006453000-memory.dmp

Filesize
42.1MB

Download
memory/2236-17-0x0000000003A40000-0x0000000006453000-memory.dmp

Filesize
42.1MB

Download
memory/2236-18-0x0000000077C91000-0x0000000077D92000-memory.dmp

Filesize
1.0MB

Download
memory/2236-19-0x0000000077C90000-0x0000000077E39000-memory.dmp

Filesize
1.7MB

Download
memory/2236-21-0x0000000003A40000-0x0000000006453000-memory.dmp

Filesize
42.1MB

Download
memory/2884-20-0x0000000077C90000-0x0000000077E39000-memory.dmp

Filesize
1.7MB

Download
memory/2884-75-0x0000000000400000-0x0000000000581000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads