guloader | cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b | Triage

Analysis

max time kernel
142s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 14:30

Sharing

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General

Target

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
Size

1.3MB
MD5

b6fed6afcf62aeefa78ac29a132b73ea
SHA1

c596ab383a296dee20fb5d03af998d5c8ef6e61c
SHA256

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b
SHA512

07a7072a1e3bc7cb55d3103e5c7d0e77bc1e3d78ac33d964be7356d9b0eaa165d8cf9d38140e9e74dba7bb77b5f2fb3fd2ed8ec12a3a69813a868b0a326ca2e4
SSDEEP

24576:r9Q0lIVTRJlXeXeWAFlw3x1CQgy/U77VaaG8uosbrDqa1VHWTcSdmWDxbLn/ohm:5Q0lsRLXTCx1JM77YoOrDX1l2xbLn/wm

Score

10^/10

guloader downloader

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 1 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

pid process

3192 cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

56 drive.google.com
57 drive.google.com
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

pid process

1092 cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.execd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

pid	process
3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
1092	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

description	pid	process	target process
PID 3192 set thread context of 1092	3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Drops file in Program Files directory 1 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\konvoluterer\Forsikringsinspektrer.ini	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Drops file in Windows directory 1 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

description	ioc	process
File opened for modification	C:\Windows\mycelian\sempitern.ini	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4556 1092 WerFault.exe cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

pid	process
1092	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
1092	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

pid process

3192 cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

description	pid	process	target process
PID 3192 wrote to memory of 1092	3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
PID 3192 wrote to memory of 1092	3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
PID 3192 wrote to memory of 1092	3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
PID 3192 wrote to memory of 1092	3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
PID 3192 wrote to memory of 1092	3192	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe	cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe

C:\Users\Admin\AppData\Local\Temp\cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
"C:\Users\Admin\AppData\Local\Temp\cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3192

C:\Users\Admin\AppData\Local\Temp\cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe
"C:\Users\Admin\AppData\Local\Temp\cd28e2cfe01499fecd66cdc8ff88502194f77e826d6191c3f838c5f760402a8b.exe"
2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
PID:1092

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1092 -s 200
3⤵
- Program crash
PID:4556

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3748 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:4488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1092 -ip 1092
1⤵
PID:4104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Command and Control

Web Service

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsh49E7.tmp\System.dll

Filesize
11KB

MD5
b8992e497d57001ddf100f9c397fcef5

SHA1
e26ddf101a2ec5027975d2909306457c6f61cfbd

SHA256
98bcd1dd88642f4dd36a300c76ebb1ddfbbbc5bfc7e3b6d7435dc6d6e030c13b

SHA512
8823b1904dccfaf031068102cb1def7958a057f49ff369f0e061f1b4db2090021aa620bb8442a2a6ac9355bb74ee54371dc2599c20dc723755a46ede81533a3c

Download Submit
memory/1092-52-0x0000000001660000-0x0000000003D56000-memory.dmp

Filesize
39.0MB

Download
memory/1092-54-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1092-57-0x0000000001660000-0x0000000003D56000-memory.dmp

Filesize
39.0MB

Download
memory/1092-56-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1092-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1092-37-0x0000000001660000-0x0000000003D56000-memory.dmp

Filesize
39.0MB

Download
memory/1092-50-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1092-55-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/1092-53-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3192-32-0x0000000004A40000-0x0000000007136000-memory.dmp

Filesize
39.0MB

Download
memory/3192-33-0x0000000004A40000-0x0000000007136000-memory.dmp

Filesize
39.0MB

Download
memory/3192-51-0x0000000004A40000-0x0000000007136000-memory.dmp

Filesize
39.0MB

Download
memory/3192-35-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3192-34-0x0000000076FC1000-0x00000000770E1000-memory.dmp

Filesize
1.1MB

Download