guloader | b598b61f5443239b8c51ebee3de95d33ebe57cf6f3250528fdd94810c3789a90

General

Target

SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe
Size

460KB
MD5

d389d3526bc35937d3ffc6d2109a876f
SHA1

798e1b2fbea4b2d0b6826fb6c15daf2cc87ad58b
SHA256

b598b61f5443239b8c51ebee3de95d33ebe57cf6f3250528fdd94810c3789a90
SHA512

a5cd970a01c1a356c3345724d39655907d00e05c6698539a890351959b81ed30d378d11812a01f097e2a31e5d4eb271779a2ae86279fbb5fa1421c2766927432
SSDEEP

1536:DWkc8UVJnMQLLI9m9CzsABLaYcfFvKr/63On6BpEoGiV:DN0JnMg8gCzsAFa5fFvKrMQ6BpEoG2

Score

10^/10

guloader downloader guloader persistence

Malware Config

Extracted

Family

guloader

C2

https://drive.google.com/uc?export=download&id=1Qjrpw8RUpYAHmEluWbVlH_nfGfr3r4V-

https://www.sendspace.com/pro/dl/v4w6wl

xor.base64

Signatures

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

Guloader payload 3 IoCs

guloader

Processes:

resource	yara_rule
behavioral1/memory/1904-56-0x00000000003E0000-0x00000000003F0000-memory.dmp	family_guloader
behavioral1/memory/1708-60-0x000000000120B7DE-mapping.dmp	family_guloader
behavioral1/memory/1708-63-0x0000000000130000-0x0000000000230000-memory.dmp	family_guloader

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce	RegAsm.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\MORT = "C:\\Users\\Admin\\SUPREMA\\Vdde6.exe"	RegAsm.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exeRegAsm.exe

pid process

1904 SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe
1708 RegAsm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

description pid process target process

PID 1904 set thread context of 1708 1904 SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe RegAsm.exe

pid	process
1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe
1708	RegAsm.exe

description	pid	process	target process
PID 1904 set thread context of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	RegAsm.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	RegAsm.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

pid process

1904 SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

pid process

1904 SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

pid	process
1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

pid	process
1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe

description	pid	process	target process
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe
PID 1904 wrote to memory of 1708	1904	SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1904

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.KillProc2.9731.8373.22974.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies system certificate store
PID:1708

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1708-64-0x00000000772F0000-0x0000000077499000-memory.dmp

Filesize
1.7MB

Download
memory/1708-70-0x00000000774D0000-0x0000000077650000-memory.dmp

Filesize
1.5MB

Download
memory/1708-71-0x00000000774D0000-0x0000000077650000-memory.dmp

Filesize
1.5MB

Download
memory/1708-60-0x000000000120B7DE-mapping.dmp

Download
memory/1708-68-0x00000000774D0000-0x0000000077650000-memory.dmp

Filesize
1.5MB

Download
memory/1708-63-0x0000000000130000-0x0000000000230000-memory.dmp

Filesize
1024KB

Download
memory/1708-69-0x00000000774D0000-0x0000000077650000-memory.dmp

Filesize
1.5MB

Download
memory/1904-62-0x00000000774D0000-0x0000000077650000-memory.dmp

Filesize
1.5MB

Download
memory/1904-56-0x00000000003E0000-0x00000000003F0000-memory.dmp

Filesize
64KB

Download
memory/1904-57-0x00000000772F0000-0x0000000077499000-memory.dmp

Filesize
1.7MB

Download
memory/1904-67-0x00000000003E0000-0x00000000003F0000-memory.dmp

Filesize
64KB

Download
memory/1904-59-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download
memory/1904-72-0x00000000003E0000-0x00000000003F0000-memory.dmp

Filesize
64KB

Download
memory/1904-73-0x00000000774D0000-0x0000000077650000-memory.dmp

Filesize
1.5MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

Loading Replay Monitor...

Downloads