guloader | 5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
06-11-2024 02:46

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General

Target

5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe
Size

545KB
MD5

6fa8bc297f2359d3cd35fc1ef12c1b9e
SHA1

b6be96971f04dd616e399a2cad14d49e08623036
SHA256

5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af
SHA512

baec2716fc69dc58a2eea22458ef6ab10825beb537bbdb9ec727d6086ea0cdff06136f709173c01a6643ef6bfc717e04e6de285862a5a6d5e9e3d9c9a6529793
SSDEEP

6144:VPXc3AQYxRhND7QZ+Z4jeRZEkzu5PdT0qsTbKqN1Z+i1Sl9DsZ+cBcomv6rb2:iuRT7QZ+Zj4kq25Cl9DsZ+URr

Score

10^/10

guloader discovery downloader execution

Malware Config

Signatures

Guloader family
guloader
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

Processes:

powershell.exe

pid process

1244 powershell.exe
Loads dropped DLL 1 IoCs

Processes:

Yieldableness.exe

pid process

1868 Yieldableness.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

26 drive.google.com
27 drive.google.com
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

powershell.exeYieldableness.exe

pid process

1244 powershell.exe
1868 Yieldableness.exe

pid	process
1868	Yieldableness.exe

flow	ioc
26	drive.google.com
27	drive.google.com

Drops file in Program Files directory 1 IoCs

Processes:

5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\omflakkende\reparationsvrkstedernes.Clu	5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.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 3 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:

5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exepowershell.exeYieldableness.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Yieldableness.exe

NSIS installer 2 IoCs

installer

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Yieldableness.exe	nsis_installer_1
C:\Users\Admin\AppData\Local\Temp\Yieldableness.exe	nsis_installer_2

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe

pid	process
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

powershell.exe

pid process

1244 powershell.exe

Suspicious use of AdjustPrivilegeToken 22 IoCs

Processes:

powershell.exe

description	pid	process
Token: SeDebugPrivilege	1244	powershell.exe
Token: SeIncreaseQuotaPrivilege	1244	powershell.exe
Token: SeSecurityPrivilege	1244	powershell.exe
Token: SeTakeOwnershipPrivilege	1244	powershell.exe
Token: SeLoadDriverPrivilege	1244	powershell.exe
Token: SeSystemProfilePrivilege	1244	powershell.exe
Token: SeSystemtimePrivilege	1244	powershell.exe
Token: SeProfSingleProcessPrivilege	1244	powershell.exe
Token: SeIncBasePriorityPrivilege	1244	powershell.exe
Token: SeCreatePagefilePrivilege	1244	powershell.exe
Token: SeBackupPrivilege	1244	powershell.exe
Token: SeRestorePrivilege	1244	powershell.exe
Token: SeShutdownPrivilege	1244	powershell.exe
Token: SeDebugPrivilege	1244	powershell.exe
Token: SeSystemEnvironmentPrivilege	1244	powershell.exe
Token: SeRemoteShutdownPrivilege	1244	powershell.exe
Token: SeUndockPrivilege	1244	powershell.exe
Token: SeManageVolumePrivilege	1244	powershell.exe
Token: 33	1244	powershell.exe
Token: 34	1244	powershell.exe
Token: 35	1244	powershell.exe
Token: 36	1244	powershell.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exepowershell.exe

description	pid	process	target process
PID 1696 wrote to memory of 1244	1696	5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe	powershell.exe
PID 1696 wrote to memory of 1244	1696	5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe	powershell.exe
PID 1696 wrote to memory of 1244	1696	5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe	powershell.exe
PID 1244 wrote to memory of 1868	1244	powershell.exe	Yieldableness.exe
PID 1244 wrote to memory of 1868	1244	powershell.exe	Yieldableness.exe
PID 1244 wrote to memory of 1868	1244	powershell.exe	Yieldableness.exe
PID 1244 wrote to memory of 1868	1244	powershell.exe	Yieldableness.exe

C:\Users\Admin\AppData\Local\Temp\5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe
"C:\Users\Admin\AppData\Local\Temp\5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  powershell.exe -w hidden "$Realindkomster=Get-Content -raw 'C:\Users\Admin\AppData\Roaming\trossamfund\Enwreathing253\fejningen\Catchpoleship.Ter';$Pamfiliussernes173=$Realindkomster.SubString(57686,3);.$Pamfiliussernes173($Realindkomster)
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1244
- - C:\Users\Admin\AppData\Local\Temp\Yieldableness.exe
    "C:\Users\Admin\AppData\Local\Temp\Yieldableness.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    PID:1868

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Yieldableness.exe

Filesize
545KB

MD5
6fa8bc297f2359d3cd35fc1ef12c1b9e

SHA1
b6be96971f04dd616e399a2cad14d49e08623036

SHA256
5a99c490bd9b35a1efe9c4233023dc37641f78b67e34632c9833ec8c06c3c4af

SHA512
baec2716fc69dc58a2eea22458ef6ab10825beb537bbdb9ec727d6086ea0cdff06136f709173c01a6643ef6bfc717e04e6de285862a5a6d5e9e3d9c9a6529793

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nygxo435.ocd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\trossamfund\Enwreathing253\fejningen\Catchpoleship.Ter

Filesize
56KB

MD5
bea0253bd1d370c8bcc515e8ff7bb6e9

SHA1
9b1443ba1094479087b73d1999cbadfb8e2eacbd

SHA256
844e8c95af74d9b8b7ee184a61f16ce1221679b84556cb78b9acab1d0fb9936b

SHA512
1930e412af035f6a4ba452b3af21ba77c316fb757d32250fe343e648b3bee421c495f2607f3549cd20e1a079f9934a0ab5f7a7af0b648742ecd00b1f9e0c18be

Download Submit
C:\Users\Admin\AppData\Roaming\trossamfund\Enwreathing253\fejningen\Respites.Duc

Filesize
207KB

MD5
81683ea1765b7075c738e7fba1794fa4

SHA1
da45097f2b5b5ba038eaa51efc4968e649d37a2d

SHA256
3d7177dde287ae15c3a6ae7ed394c7afb2ba3ceb2b8af4a614ab61c87663cab3

SHA512
7ff1edb4a9419a5cee58ec0102815b741cca84e75c11cd5324c68228eddec64d0c50bd7c78baf79bf6b793421812a36caf5435943cbc616da00688ab5415b7c1

Download Submit
memory/1244-25-0x0000000006740000-0x000000000678C000-memory.dmp

Filesize
304KB

Download
memory/1244-62-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-13-0x0000000006070000-0x00000000060D6000-memory.dmp

Filesize
408KB

Download
memory/1244-12-0x0000000005970000-0x00000000059D6000-memory.dmp

Filesize
408KB

Download
memory/1244-19-0x00000000060E0000-0x0000000006434000-memory.dmp

Filesize
3.3MB

Download
memory/1244-10-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-6-0x0000000073DDE000-0x0000000073DDF000-memory.dmp

Filesize
4KB

Download
memory/1244-24-0x0000000006700000-0x000000000671E000-memory.dmp

Filesize
120KB

Download
memory/1244-26-0x00000000077B0000-0x0000000007846000-memory.dmp

Filesize
600KB

Download
memory/1244-27-0x0000000006BC0000-0x0000000006BDA000-memory.dmp

Filesize
104KB

Download
memory/1244-28-0x0000000006C50000-0x0000000006C72000-memory.dmp

Filesize
136KB

Download
memory/1244-29-0x0000000007E00000-0x00000000083A4000-memory.dmp

Filesize
5.6MB

Download
memory/1244-8-0x0000000005A40000-0x0000000006068000-memory.dmp

Filesize
6.2MB

Download
memory/1244-47-0x0000000007B90000-0x0000000007C33000-memory.dmp

Filesize
652KB

Download
memory/1244-34-0x0000000070260000-0x00000000702AC000-memory.dmp

Filesize
304KB

Download
memory/1244-33-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-32-0x0000000007B40000-0x0000000007B72000-memory.dmp

Filesize
200KB

Download
memory/1244-35-0x00000000709E0000-0x0000000070D34000-memory.dmp

Filesize
3.3MB

Download
memory/1244-45-0x0000000007B20000-0x0000000007B3E000-memory.dmp

Filesize
120KB

Download
memory/1244-11-0x00000000056D0000-0x00000000056F2000-memory.dmp

Filesize
136KB

Download
memory/1244-31-0x0000000008A30000-0x00000000090AA000-memory.dmp

Filesize
6.5MB

Download
memory/1244-48-0x0000000007CC0000-0x0000000007CCA000-memory.dmp

Filesize
40KB

Download
memory/1244-50-0x0000000007D30000-0x0000000007D54000-memory.dmp

Filesize
144KB

Download
memory/1244-49-0x0000000007D00000-0x0000000007D2A000-memory.dmp

Filesize
168KB

Download
memory/1244-51-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-53-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-9-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-56-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-57-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-55-0x0000000073DDE000-0x0000000073DDF000-memory.dmp

Filesize
4KB

Download
memory/1244-58-0x00000000090B0000-0x000000000A6C3000-memory.dmp

Filesize
22.1MB

Download
memory/1244-59-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-60-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-46-0x0000000073DD0000-0x0000000074580000-memory.dmp

Filesize
7.7MB

Download
memory/1244-7-0x0000000002D40000-0x0000000002D76000-memory.dmp

Filesize
216KB

Download
memory/1868-64-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-65-0x0000000001660000-0x0000000002C73000-memory.dmp

Filesize
22.1MB

Download
memory/1868-78-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1868-79-0x0000000001660000-0x0000000002C73000-memory.dmp

Filesize
22.1MB

Download