guloader | 00b33c93902d9cb8722957b2512a45196b37284ffd85489e74d973aae7ec1962

General

Target

Korrekturlsning.exe
Size

564KB
MD5

092db8e9c1a9c370510f7e33067be9bf
SHA1

38204269d191f5b7745932f8ca05af8c13cba110
SHA256

00b33c93902d9cb8722957b2512a45196b37284ffd85489e74d973aae7ec1962
SHA512

86daa82ad2ff52c35e4e6e13da0ef11da3243ccd56d79614628bf7b7533fc05f23755ca80540c2ec02ed247574c8e653ef0f91c60b58e7f32d092446f9098b2f
SSDEEP

12288:32EIBt4q0c1yIPM9M3NFNPvJlQfkHphGvOvz28i2cK5L/jM+qImd3ZhZU:3wBGLYP1Jlmgph42a8bvTfPmdPZU

Score

10^/10

guloader vipkeylogger discovery downloader keylogger persistence stealer

Malware Config

Extracted

Family

vipkeylogger

C2

https://api.telegram.org/bot8124032214:AAHsMb8ZSRX6oiufFz1tRalXrmGjYujuzB4/sendMessage?chat_id=6198188190

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
VIPKeylogger
VIPKeylogger is a keylogger and infostealer written in C# and it resembles SnakeKeylogger that was found in 2020.
stealer keylogger vipkeylogger
Vipkeylogger family
vipkeylogger

Loads dropped DLL 1 IoCs

Processes:

Korrekturlsning.exe

pid	Process
576	Korrekturlsning.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

Korrekturlsning.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Rytmiserendes = "C:\\Users\\Admin\\AppData\\Local\\Temp\\nonconsumption\\Oraklerne100.exe"	Korrekturlsning.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
6	checkip.dyndns.org

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

Korrekturlsning.exe

pid	Process
2520	Korrekturlsning.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

Korrekturlsning.exeKorrekturlsning.exe

pid	Process
576	Korrekturlsning.exe
2520	Korrekturlsning.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Korrekturlsning.exe

description	pid	Process	procid_target
PID 576 set thread context of 2520	576	Korrekturlsning.exe	31

Drops file in Windows directory 1 IoCs

Processes:

Korrekturlsning.exe

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\slnger\barometerstandenes.san	Korrekturlsning.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:

Korrekturlsning.exeKorrekturlsning.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Korrekturlsning.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Korrekturlsning.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

Korrekturlsning.exe

pid	Process
2520	Korrekturlsning.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

Korrekturlsning.exe

pid	Process
576	Korrekturlsning.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Korrekturlsning.exe

description	pid	Process
Token: SeDebugPrivilege	2520	Korrekturlsning.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Korrekturlsning.exe

description	pid	Process	procid_target
PID 576 wrote to memory of 2520	576	Korrekturlsning.exe	31
PID 576 wrote to memory of 2520	576	Korrekturlsning.exe	31
PID 576 wrote to memory of 2520	576	Korrekturlsning.exe	31
PID 576 wrote to memory of 2520	576	Korrekturlsning.exe	31
PID 576 wrote to memory of 2520	576	Korrekturlsning.exe	31
PID 576 wrote to memory of 2520	576	Korrekturlsning.exe	31

C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe
"C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"
1⤵
- 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:576
- C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe
  "C:\Users\Admin\AppData\Local\Temp\Korrekturlsning.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2520

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

\Users\Admin\AppData\Local\Temp\nsyD4CD.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/576-9-0x00000000031B0000-0x000000000587E000-memory.dmp

Filesize
38.8MB

Download
memory/576-10-0x0000000077811000-0x0000000077912000-memory.dmp

Filesize
1.0MB

Download
memory/576-11-0x0000000077810000-0x00000000779B9000-memory.dmp

Filesize
1.7MB

Download
memory/576-12-0x00000000031B0000-0x000000000587E000-memory.dmp

Filesize
38.8MB

Download
memory/2520-13-0x0000000077810000-0x00000000779B9000-memory.dmp

Filesize
1.7MB

Download
memory/2520-15-0x00000000007E0000-0x0000000001842000-memory.dmp

Filesize
16.4MB

Download
memory/2520-16-0x00000000007E0000-0x0000000001842000-memory.dmp

Filesize
16.4MB

Download
memory/2520-17-0x00000000007E0000-0x000000000082A000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads