guloader | b71e123f35a70fe444f019c9b94fa65c383d14eced3647bb13ac4e50ec810af8

Analysis

max time kernel
145s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26-06-2024 20:55

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General

Target

AMENDED CONTRACT-pdf.exe
Size

749KB
MD5

0dd2464556b15a0110a61fbb9c059fd7
SHA1

85dc6648297ce3a175c87f90ad87c0c19940f7ec
SHA256

ec718f7c0b27972083cd3990267d68a2cebd76b6fcaa224c44f3b165d95125f3
SHA512

7a46b3ac69acdc85cfd54be576144035ef844cb64ac4a918735e1bf96fd1785e9c2d13e6d93424689397e3a89b879385638d3d96386d9ba49742b69271f4e23c
SSDEEP

12288:TA4AyshjrfD3NfhN3ImdnkOMR4vejLiuLbKc+z6ps:TA4A/hfDJ3IokOMR4vaiu68s

Score

10^/10

guloader downloader execution

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 2 IoCs

Processes:

AMENDED CONTRACT-pdf.exeBagmndene.bat

pid process

5040 AMENDED CONTRACT-pdf.exe
2088 Bagmndene.bat
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

powershell.exeBagmndene.bat

pid process

2332 powershell.exe
2088 Bagmndene.bat
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 2332 set thread context of 2088 2332 powershell.exe Bagmndene.bat
Drops file in Program Files directory 1 IoCs

Processes:

AMENDED CONTRACT-pdf.exe

description ioc process

File opened for modification C:\Program Files (x86)\Common Files\Valgbestyrelse177\Voicing.Psy AMENDED CONTRACT-pdf.exe
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

2332 powershell.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
NSIS installer 2 IoCs
installer

Processes:

resource yara_rule

C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat nsis_installer_1
C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat nsis_installer_2
Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe

pid process

2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
2332 powershell.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

powershell.exe

pid process

2332 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 2332 powershell.exe

pid	process
5040	AMENDED CONTRACT-pdf.exe
2088	Bagmndene.bat

pid	process
2332	powershell.exe
2088	Bagmndene.bat

description	pid	process	target process
PID 2332 set thread context of 2088	2332	powershell.exe	Bagmndene.bat

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\Valgbestyrelse177\Voicing.Psy	AMENDED CONTRACT-pdf.exe

pid	process
2332	powershell.exe

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat	nsis_installer_1
C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat	nsis_installer_2

pid	process
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe
2332	powershell.exe

pid	process
2332	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2332	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

AMENDED CONTRACT-pdf.exepowershell.exe

description	pid	process	target process
PID 5040 wrote to memory of 2332	5040	AMENDED CONTRACT-pdf.exe	powershell.exe
PID 5040 wrote to memory of 2332	5040	AMENDED CONTRACT-pdf.exe	powershell.exe
PID 5040 wrote to memory of 2332	5040	AMENDED CONTRACT-pdf.exe	powershell.exe
PID 2332 wrote to memory of 2088	2332	powershell.exe	Bagmndene.bat
PID 2332 wrote to memory of 2088	2332	powershell.exe	Bagmndene.bat
PID 2332 wrote to memory of 2088	2332	powershell.exe	Bagmndene.bat
PID 2332 wrote to memory of 2088	2332	powershell.exe	Bagmndene.bat
PID 2332 wrote to memory of 2088	2332	powershell.exe	Bagmndene.bat

C:\Users\Admin\AppData\Local\Temp\AMENDED CONTRACT-pdf.exe
"C:\Users\Admin\AppData\Local\Temp\AMENDED CONTRACT-pdf.exe"
1⤵
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:5040

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" -windowstyle minimized "$hydroxamic=Get-Content 'C:\Users\Admin\AppData\Roaming\Njeregnende130\Ramular.Ung';$Rammes=$hydroxamic.SubString(51368,3);.$Rammes($hydroxamic)"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2332

C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat
"C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat"
3⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:2088

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Bagmndene.bat
Filesize
749KB

MD5
0dd2464556b15a0110a61fbb9c059fd7

SHA1
85dc6648297ce3a175c87f90ad87c0c19940f7ec

SHA256
ec718f7c0b27972083cd3990267d68a2cebd76b6fcaa224c44f3b165d95125f3

SHA512
7a46b3ac69acdc85cfd54be576144035ef844cb64ac4a918735e1bf96fd1785e9c2d13e6d93424689397e3a89b879385638d3d96386d9ba49742b69271f4e23c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_k4nwsium.2ku.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsw3F0D.tmp\nsExec.dll
Filesize
6KB

MD5
b5a1f9dc73e2944a388a61411bdd8c70

SHA1
dc9b20df3f3810c2e81a0c54dea385704ba8bef7

SHA256
288100583f65a2b7acfc0c7e231c0e268c58d3067675543f627c01e82f6fd884

SHA512
b9c8d71b5da00f2aff7847b9ec3bd8a588afeb525f47a0df235b52f7b2233edb3928a2c8e0b493f287c923cc52a340ad6fee99822595d6591df0e97870de92a8

Download Submit
C:\Users\Admin\AppData\Roaming\Njeregnende130\Pandekagernes.Ste
Filesize
293KB

MD5
60dc1196d4762f2c6fde8783aa072411

SHA1
de2d6b73353192f255adea46d0d15ef90481c46e

SHA256
ca4c1efd5b5a9176d74c4b609af10dd3f8ee3e0c8b0f18db6132ef21d1c0036a

SHA512
0e6212d34f51f34c06a73a4a41355444b45a3ba005792eb7c0e5f67c3927509a0ef29dc8b04f90382fcbd0240a641f430a31fb5187874b26d0a656397292a404

Download Submit
C:\Users\Admin\AppData\Roaming\Njeregnende130\Ramular.Ung
Filesize
50KB

MD5
bbb874e352104ce1877463082844e0fe

SHA1
0bcdaa64d2d73bb02a234c01250e4c1a01685982

SHA256
8596f717c16cd7f6b8da94bc3dbaa08419f5945018763c8fac4fca4de284f3d8

SHA512
43806040375f8a67de74beac471d5e90924883eaa35a1f71701a477e4085049cf1b39f9e0f17a0cf3b624236b73cb531b85040e4421535e509f181fa3598d390

Download Submit
memory/2088-53-0x0000000001660000-0x0000000002540000-memory.dmp

Filesize
14.9MB

Download
memory/2088-50-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2088-46-0x0000000001660000-0x0000000002540000-memory.dmp

Filesize
14.9MB

Download
memory/2088-45-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/2332-33-0x0000000008B30000-0x00000000091AA000-memory.dmp

Filesize
6.5MB

Download
memory/2332-38-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-26-0x00000000068A0000-0x00000000068BE000-memory.dmp

Filesize
120KB

Download
memory/2332-27-0x00000000068E0000-0x000000000692C000-memory.dmp

Filesize
304KB

Download
memory/2332-30-0x0000000006E00000-0x0000000006E22000-memory.dmp

Filesize
136KB

Download
memory/2332-29-0x0000000006D80000-0x0000000006D9A000-memory.dmp

Filesize
104KB

Download
memory/2332-28-0x0000000007860000-0x00000000078F6000-memory.dmp

Filesize
600KB

Download
memory/2332-31-0x0000000007F00000-0x00000000084A4000-memory.dmp

Filesize
5.6MB

Download
memory/2332-12-0x00000000058C0000-0x00000000058E2000-memory.dmp

Filesize
136KB

Download
memory/2332-17-0x0000000006220000-0x0000000006286000-memory.dmp

Filesize
408KB

Download
memory/2332-35-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-36-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-14-0x00000000061B0000-0x0000000006216000-memory.dmp

Filesize
408KB

Download
memory/2332-21-0x0000000006290000-0x00000000065E4000-memory.dmp

Filesize
3.3MB

Download
memory/2332-40-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-39-0x00000000091B0000-0x000000000A090000-memory.dmp

Filesize
14.9MB

Download
memory/2332-42-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-13-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-43-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

Filesize
4KB

Download
memory/2332-10-0x00000000059D0000-0x0000000005FF8000-memory.dmp

Filesize
6.2MB

Download
memory/2332-11-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-48-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-49-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-9-0x0000000005300000-0x0000000005336000-memory.dmp

Filesize
216KB

Download
memory/2332-52-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download
memory/2332-8-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

Filesize
4KB

Download
memory/2332-58-0x0000000073B90000-0x0000000074340000-memory.dmp

Filesize
7.7MB

Download