guloader | 3cc0673a2dae097af0596df41724f6770be2e444bd9d98bb83b454075c4c8150

Analysis

max time kernel
66s
max time network
132s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
14/10/2026, 10:41

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General

Target
jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe
Size 786KB
Sample261014-mrcsysbx41
SHA256 3cc0673a2dae097af0596df41724f6770be2e444bd9d98bb83b454075c4c8150
MD5 70e12e745fbfe08a6fcbe155a2d1086c
SHA1 c53ecf7a3648d560310b2a6dbe4947e9b94bfa04
SHA512 67d43649ab166c0bb21f1ec4893358651e0815866032d8dfe588155da10395886cdb6ede90d8e7ee214f2540665aae959e33c1e78897718cef72e27500af4fb6
SSDEEP 24576:6KxgUaf7sUMOCey0ZSpoujKwnrPuPpzjzCqfjzF:6aaTsFJsSJjKRxPuq7x
TLSH
T14505F123746ACC97DC1481344A96F55C32FDAE033C59FAD261427FAD3B72BA264F484A
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery downloader guloader hawkeye keylogger spyware stealer trojan

Malware Config

Signatures

Family: Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Family: HawkEye
HawkEye is a malware kit that has seen continuous development since at least 2013.
keylogger trojan stealer spyware hawkeye

Detected Nirsoft tools 4 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/4232-8-0x0000000002260000-0x00000000022F0000-memory.dmp	Nirsoft
behavioral2/memory/5404-33-0x0000000006D10000-0x0000000006DA0000-memory.dmp	Nirsoft
behavioral2/memory/2000-45-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/956-48-0x0000000000400000-0x0000000000458000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4232-8-0x0000000002260000-0x00000000022F0000-memory.dmp	MailPassView
behavioral2/memory/5404-33-0x0000000006D10000-0x0000000006DA0000-memory.dmp	MailPassView
behavioral2/memory/2000-45-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4232-8-0x0000000002260000-0x00000000022F0000-memory.dmp	WebBrowserPassView
behavioral2/memory/5404-33-0x0000000006D10000-0x0000000006DA0000-memory.dmp	WebBrowserPassView
behavioral2/memory/956-48-0x0000000000400000-0x0000000000458000-memory.dmp	WebBrowserPassView

Deletes itself 1 TTPs 1 IoCs

defense_evasion

File Deletion

T1070.004

pid	Process
5404	Windows Update.exe

Executes dropped EXE 2 IoCs

pid	Process
4812	Windows Update.exe
5404	Windows Update.exe

Uses the VBS compiler for execution 1 TTPs

Command and Scripting Interpreter
T1059

Looks up external IP address via web service 1 TTPs 1 IoCs

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

discovery

Internet Connection Discovery

T1016.001

flow	ioc
1	whatismyipaddress.com

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4944 set thread context of 4232	4944	jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe	89
PID 4812 set thread context of 5404	4812	Windows Update.exe	91
PID 5404 set thread context of 2000	5404	Windows Update.exe	94
PID 5404 set thread context of 956	5404	Windows Update.exe	95

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

discovery

System Network Configuration Discovery

T1016

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Domain	Windows Update.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters\Hostname	Windows Update.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	Windows Update.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Windows Update.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5404	Windows Update.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4944	jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe
4812	Windows Update.exe
5404	Windows Update.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4944 wrote to memory of 4232	4944	jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe	89
PID 4232 wrote to memory of 4812	4232	jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe	90
PID 4812 wrote to memory of 5404	4812	Windows Update.exe	91
PID 5404 wrote to memory of 2000	5404	Windows Update.exe	94
PID 5404 wrote to memory of 2000	5404	Windows Update.exe	94
PID 5404 wrote to memory of 2000	5404	Windows Update.exe	94
PID 5404 wrote to memory of 2000	5404	Windows Update.exe	94
PID 5404 wrote to memory of 2000	5404	Windows Update.exe	94
PID 5404 wrote to memory of 2000	5404	Windows Update.exe	94
PID 5404 wrote to memory of 956	5404	Windows Update.exe	95
PID 5404 wrote to memory of 956	5404	Windows Update.exe	95
PID 5404 wrote to memory of 956	5404	Windows Update.exe	95
PID 5404 wrote to memory of 956	5404	Windows Update.exe	95
PID 5404 wrote to memory of 956	5404	Windows Update.exe	95
PID 5404 wrote to memory of 956	5404	Windows Update.exe	95

C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe
"C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4944
- C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe
  C:\Users\Admin\AppData\Local\Temp\jaffacakes118_Trojan.Win32.VBKryjetor.baty.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4232
- - C:\Users\Admin\AppData\Roaming\Windows Update.exe
    "C:\Users\Admin\AppData\Roaming\Windows Update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4812
  - - C:\Users\Admin\AppData\Roaming\Windows Update.exe
      C:\Users\Admin\AppData\Roaming\Windows Update.exe"
      4⤵
      Deletes itself
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Reads the TCP/IP host and domain name from the registry
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:5404
    - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holdermail.txt"
        5⤵
        
        PID:2000
    - - C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
        
        C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\holderwb.txt"
        5⤵
        
        PID:956

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

SysInfo.txt

Path C:\Users\Admin\AppData\Local\Temp\SysInfo.txt
Size 80B
SHA256 a9409a773e5adc1c1a515e1ebbd09b19e139d58cf6e20171bc0c9890cdd087c0
MD5 00678efcc3d701bdb8fe1b247820f61b
SHA1 138b5b4c8cb21cb7b1e2a6557452d57f28557df8
SHA512 89a583de1781d9594d1c3b36bbe09dfecbf080e92dc0ee384d883676a0e11999ad40dda475831ed4035839c50d40ec9742d317ba9b5c56866cf4c6d9400f1727
TLSH
T106A02404C1C54D0D4400D45704F0C7CC54140F041F453F300710C0D45330C05734333C
MD5 SHA1 SHA512 TLSH

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Windows Update.exe

Path C:\Users\Admin\AppData\Roaming\Windows Update.exe
Size 786KB
SHA256 3cc0673a2dae097af0596df41724f6770be2e444bd9d98bb83b454075c4c8150
MD5 70e12e745fbfe08a6fcbe155a2d1086c
SHA1 c53ecf7a3648d560310b2a6dbe4947e9b94bfa04
SHA512 67d43649ab166c0bb21f1ec4893358651e0815866032d8dfe588155da10395886cdb6ede90d8e7ee214f2540665aae959e33c1e78897718cef72e27500af4fb6
SSDEEP 24576:6KxgUaf7sUMOCey0ZSpoujKwnrPuPpzjzCqfjzF:6aaTsFJsSJjKRxPuq7x
TLSH
T14505F123746ACC97DC1481344A96F55C32FDAE033C59FAD261427FAD3B72BA264F484A
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/956-48-0x0000000000400000-0x0000000000458000-memory.dmp

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memory/2000-45-0x0000000000400000-0x000000000041B000-memory.dmp

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memory/4232-22-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4232-19-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4232-18-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4232-17-0x0000000075BDC000-0x0000000075BDD000-memory.dmp

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memory/4232-20-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4232-25-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/4232-28-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4232-21-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4232-8-0x0000000002260000-0x00000000022F0000-memory.dmp

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memory/4232-5-0x0000000000400000-0x0000000000477000-memory.dmp

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memory/4812-30-0x0000000075BC0000-0x0000000075CB0000-memory.dmp

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memory/4944-2-0x00000000022B0000-0x00000000022B6000-memory.dmp

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memory/5404-33-0x0000000006D10000-0x0000000006DA0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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