agenttesla | f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b

Analysis

max time kernel
142s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02-07-2024 02:13

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General

Target

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
Size

495KB
MD5

efd3bf2442d368363512548564a51050
SHA1

ca5a3f2750542ea7d6b86f108eb6bff4095f4b16
SHA256

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b
SHA512

c26bea56fd64182ecfb9c2d3968d8c2e9cf8066a421606cda53ab3684d5564fb9e5f4496ca61c8b2c97fa5e52a81753481a40dddbe7115ba5ec96c580e035dcc
SSDEEP

12288:c19+dlfwYKZWegvXQto36lPXgPQxJ31hRW/UiPk:PdloYK7gvAS3QGQ31hRNV

Score

10^/10

agenttesla guloader downloader keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

Credentials

Protocol: ftp
Host:
ftp://ftp.concaribe.com
Port:
21
Username:
[email protected]
Password:
ro}UWgz#!38E

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 4 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

pid	process
4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

30 api.ipify.org
31 api.ipify.org
Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

pid process

988 f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exef321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

pid process

4484 f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
988 f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

flow	ioc
30	api.ipify.org
31	api.ipify.org

Suspicious use of SetThreadContext 1 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

description	pid	process	target process
PID 4484 set thread context of 988	4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

Drops file in Program Files directory 1 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

description ioc process

File opened for modification C:\Program Files (x86)\immunologis.Byg f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

description	ioc	process
File opened for modification	C:\Program Files (x86)\immunologis.Byg	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

pid	process
988	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
988	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
988	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

pid process

4484 f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

description pid process

Token: SeDebugPrivilege 988 f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

description	pid	process
Token: SeDebugPrivilege	988	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

description	pid	process	target process
PID 4484 wrote to memory of 988	4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
PID 4484 wrote to memory of 988	4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
PID 4484 wrote to memory of 988	4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
PID 4484 wrote to memory of 988	4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
PID 4484 wrote to memory of 988	4484	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe	f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe

C:\Users\Admin\AppData\Local\Temp\f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
"C:\Users\Admin\AppData\Local\Temp\f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4484

C:\Users\Admin\AppData\Local\Temp\f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe
"C:\Users\Admin\AppData\Local\Temp\f321c2bed7f29e767bbbf1fb11f6fd64e41e5fe45b3fef084198583a20f9533b.exe"
2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:988

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 --field-trial-handle=1288,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=4160 /prefetch:8
1⤵
PID:4628

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsg14AD.tmp\BgImage.dll
Filesize
7KB

MD5
2d5f40ddc34e9dc8f43b5bf1f61301e3

SHA1
5ed3cd47affc4d55750e738581fce2b40158c825

SHA256
785944e57e8e4971f46f84a07d82dee2ab4e14a68543d83bfe7be7d5cda83143

SHA512
605cebcc480cb71ba8241782d89e030a5c01e1359accbde174cb6bdaf249167347ecb06e3781cb9b1cc4b465cef95f1663f0d9766ed84ebade87aa3970765b3e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsg14AD.tmp\System.dll
Filesize
12KB

MD5
12b140583e3273ee1f65016becea58c4

SHA1
92df24d11797fefd2e1f8d29be9dfd67c56c1ada

SHA256
014f1dfeb842cf7265a3644bc6903c592abe9049bfc7396829172d3d72c4d042

SHA512
49ffdfa1941361430b6acb3555fd3aa05e4120f28cbdf7ceaa2af5937d0b8cccd84471cf63f06f97cf203b4aa20f226bdad082e9421b8e6b62ab6e1e9fc1e68a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsg14AD.tmp\UserInfo.dll
Filesize
4KB

MD5
90228dd140188ec0ca02f7f52e4c9a30

SHA1
6880d9aeec4c97c4b7718044c9c59b92379feaca

SHA256
54bcf3d018734b884bd33a74a05eea0ac3c83501acbdb71ea8ec56ec9402a263

SHA512
1a38b1ebb9e2440dd240c8cd2406261e21b544ed392f808d36f78590075f854d89e624589bfddabcace96b33a7f3084c7686351bd66ae07ec035bbef94ef8da2

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsg14AD.tmp\nsExec.dll
Filesize
6KB

MD5
4a2f4fe4a3ad1de56ee6bf7dd4923963

SHA1
7cc68b94448c964fd99904e5784b059aed4d5daa

SHA256
89b1e6509a1b45b32933e9d785a9c8c5b9ce7c616e1112dcf7fc3fa5ca27ebde

SHA512
4b6bbe75beafae9a29932ff5ddd3940aadfae62c157836e6cdab755955782dd5354d5eb389b4b8c16bf59f4ce7a099a0161d915c1cf2968f28e195dc8e3997ea

Download Submit
memory/988-47-0x0000000036330000-0x0000000036396000-memory.dmp

Filesize
408KB

Download
memory/988-42-0x00000000016E0000-0x0000000003515000-memory.dmp

Filesize
30.2MB

Download
memory/988-43-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/988-44-0x0000000000480000-0x00000000004C2000-memory.dmp

Filesize
264KB

Download
memory/988-46-0x0000000035D80000-0x0000000036324000-memory.dmp

Filesize
5.6MB

Download
memory/988-48-0x0000000036D50000-0x0000000036DA0000-memory.dmp

Filesize
320KB

Download
memory/988-49-0x0000000036DA0000-0x0000000036E32000-memory.dmp

Filesize
584KB

Download
memory/988-50-0x0000000036E70000-0x0000000036E7A000-memory.dmp

Filesize
40KB

Download
memory/988-53-0x00000000016E0000-0x0000000003515000-memory.dmp

Filesize
30.2MB

Download
memory/4484-40-0x0000000077021000-0x0000000077141000-memory.dmp

Filesize
1.1MB

Download
memory/4484-41-0x0000000073E85000-0x0000000073E86000-memory.dmp

Filesize
4KB

Download
memory/4484-45-0x0000000004300000-0x0000000006135000-memory.dmp

Filesize
30.2MB

Download
memory/4484-39-0x0000000004300000-0x0000000006135000-memory.dmp

Filesize
30.2MB

Download