agenttesla | 010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1

Analysis

max time kernel
144s
max time network
146s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
13-06-2024 01:00

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General

Target

010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs
Size

3.2MB
MD5

3a3f7a4a8b7ea91bd05523cb83456441
SHA1

20bbbe54a25cced1f74f34521918effd6aa5877d
SHA256

010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1
SHA512

c86b406a756a9f5ad7f1368e741687af94e12ee258fc42c99c9f14d6118ded6976a09e7d7fa1840d17c72d827a900760bf69dceb774798db1a3e86fa293ba0ed
SSDEEP

6144:0BRlhwEEM38fLACxm31KtNnzZnZjIylZLImb:0zYuIN/flHb

Score

10^/10

agenttesla wshrat execution keylogger persistence spyware stealer trojan

Malware Config

Extracted

Credentials

Protocol: smtp
Host:
smtp.gmail.com
Port:
587
Username:
[email protected]
Password:
bizr usjt guapiims

Extracted

Family

agenttesla

Credentials

Protocol: smtp
Host:
smtp.gmail.com
Port:
587
Username:
[email protected]
Password:
bizr usjt guapiims
Email To:
[email protected]

Extracted

Family

wshrat

http://chongmei33.publicvm.com:7045

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
WSHRAT
WSHRAT is a variant of Houdini worm and has vbs and js variants.
trojan wshrat

Detect packed .NET executables. Mostly AgentTeslaV4. 2 IoCs

resource	yara_rule
behavioral1/files/0x005d00000001563f-10.dat	INDICATOR_EXE_Packed_GEN01
behavioral1/memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp	INDICATOR_EXE_Packed_GEN01

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

resource	yara_rule
behavioral1/files/0x005d00000001563f-10.dat	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables referencing Windows vault credential objects. Observed in infostealers 2 IoCs

resource	yara_rule
behavioral1/files/0x005d00000001563f-10.dat	INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
behavioral1/memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID

Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs

resource	yara_rule
behavioral1/files/0x005d00000001563f-10.dat	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
behavioral1/memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store

Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs

resource	yara_rule
behavioral1/files/0x005d00000001563f-10.dat	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
behavioral1/memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients

Detects executables referencing many file transfer clients. Observed in information stealers 2 IoCs

resource	yara_rule
behavioral1/files/0x005d00000001563f-10.dat	INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
behavioral1/memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients

Blocklisted process makes network request 25 IoCs

flow	pid	Process
4	2180	WScript.exe
7	2180	WScript.exe
10	2180	WScript.exe
11	2180	WScript.exe
12	2180	WScript.exe
13	2180	WScript.exe
14	2180	WScript.exe
15	2180	WScript.exe
17	2180	WScript.exe
18	2180	WScript.exe
19	2180	WScript.exe
21	2180	WScript.exe
22	2180	WScript.exe
23	2180	WScript.exe
25	2180	WScript.exe
26	2180	WScript.exe
27	2180	WScript.exe
29	2180	WScript.exe
30	2180	WScript.exe
31	2180	WScript.exe
33	2180	WScript.exe
34	2180	WScript.exe
35	2180	WScript.exe
37	2180	WScript.exe
38	2180	WScript.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs	WScript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
2668	Gcp.exe
856	kl-plugin.exe

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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Windows\CurrentVersion\Run\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs\""	WScript.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1 = "wscript.exe //B \"C:\\Users\\Admin\\AppData\\Local\\Temp\\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs\""	WScript.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	ip-api.com

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3048	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2668	Gcp.exe
2668	Gcp.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2668	Gcp.exe
Token: SeDebugPrivilege	3048	taskkill.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
856	kl-plugin.exe
856	kl-plugin.exe
2668	Gcp.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 2076	2180	WScript.exe	28
PID 2180 wrote to memory of 2076	2180	WScript.exe	28
PID 2180 wrote to memory of 2076	2180	WScript.exe	28
PID 2076 wrote to memory of 2668	2076	WScript.exe	30
PID 2076 wrote to memory of 2668	2076	WScript.exe	30
PID 2076 wrote to memory of 2668	2076	WScript.exe	30
PID 2076 wrote to memory of 2668	2076	WScript.exe	30
PID 2180 wrote to memory of 2588	2180	WScript.exe	31
PID 2180 wrote to memory of 2588	2180	WScript.exe	31
PID 2180 wrote to memory of 2588	2180	WScript.exe	31
PID 2588 wrote to memory of 3048	2588	cmd.exe	33
PID 2588 wrote to memory of 3048	2588	cmd.exe	33
PID 2588 wrote to memory of 3048	2588	cmd.exe	33
PID 2180 wrote to memory of 856	2180	WScript.exe	34
PID 2180 wrote to memory of 856	2180	WScript.exe	34
PID 2180 wrote to memory of 856	2180	WScript.exe	34
PID 2180 wrote to memory of 856	2180	WScript.exe	34

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs"
1⤵
- Blocklisted process makes network request
- Drops startup file
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2180
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\icon-smile-kl.js"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Users\Admin\AppData\Local\Temp\Gcp.exe
    "C:\Users\Admin\AppData\Local\Temp\Gcp.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2668
- C:\Windows\system32\cmd.exe
  "C:\Windows\system32\cmd.exe" /c taskkill /F /IM kl-plugin.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM kl-plugin.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3048
- C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe
  "C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe" chongmei33.publicvm.com 7045 "WSHRAT|489D4AE3|JAFTUVRJ|Admin|Microsoft Windows 7 Ultimate |plus|nan-av|false - 6/13/2024|Visual Basic-v2.0|GB:United Kingdom" 1
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\FY3LN490\json[1].json

Filesize
297B

MD5
be2ba1a8c142b5fa2178396ac67cb7d8

SHA1
b7c3d209d9c95d4b67d7ffb3c777d07f398260a5

SHA256
1191fa5928ed7ebf51830c0e601a327fb6480e4f35d9f96962c828b5b45ea260

SHA512
cca824422ebcc194e96c6af6c66160409b6c4f9e30af387921ad55712fc4316866e7ac3b2806427f7e06e43e99ef56e612738261f8d38fb58ef2758dc13c9204

Download Submit
C:\Users\Admin\AppData\Local\Temp\Gcp.exe

Filesize
243KB

MD5
d868c9dfdd377a1128f484a33c9d427d

SHA1
3cd816d84a5a06a669eb5cde82aa3eca272a6f13

SHA256
1f19267129cbabe2e50837f88eb2854c64521bd964f43a58f37365e60d5da5bd

SHA512
2702e2df330931d9fd2ed15e54aec37dbd68737cf3db642a8842cab813b9e3be67b7a5356d426772690b0b9e5c384931640d891f51662f870a9d3022eabce52b

Download Submit
C:\Users\Admin\AppData\Local\Temp\icon-smile-kl.js

Filesize
345KB

MD5
5ffa2f9b4305ee8ab9676456a5c41ae7

SHA1
9e517938920844699eddd8043df45e075682eef7

SHA256
0a75da170bd6e1cd271f48974d98345fb60b00ac3327b5e9d8fa8394c83800db

SHA512
06ed498e22a982b135c4c380cd01d296d2f05b106b5c75be4cccdaf41575750622eb7c8d5448dc935ebc6b5d525e803b9f4a3b132d503b6eccf4c28e42cad28d

Download Submit
C:\Users\Admin\AppData\Local\Temp\kl-plugin.exe

Filesize
25KB

MD5
7099a939fa30d939ccceb2f0597b19ed

SHA1
37b644ef5722709cd9024a372db4590916381976

SHA256
272e64291748fa8be01109faa46c0ea919bf4baf4924177ea6ac2ee0574f1c1a

SHA512
6e179a32b3091beee71d425248ae56495e31e9df569159a93af5826ddef28fba904ae4810d3ca2da45fe6dc8be1eeaecf71e8225b3e605f22f41f4e46d1cf721

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1.vbs

Filesize
3.2MB

MD5
3a3f7a4a8b7ea91bd05523cb83456441

SHA1
20bbbe54a25cced1f74f34521918effd6aa5877d

SHA256
010729194c08b557dc260c821d07d35b2c8fdfbaa18ff27c7f1f2fe233850fd1

SHA512
c86b406a756a9f5ad7f1368e741687af94e12ee258fc42c99c9f14d6118ded6976a09e7d7fa1840d17c72d827a900760bf69dceb774798db1a3e86fa293ba0ed

Download Submit
memory/2668-12-0x0000000074A2E000-0x0000000074A2F000-memory.dmp

Filesize
4KB

Download
memory/2668-13-0x0000000000340000-0x0000000000384000-memory.dmp

Filesize
272KB

Download
memory/2668-15-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

Download
memory/2668-31-0x0000000074A2E000-0x0000000074A2F000-memory.dmp

Filesize
4KB

Download
memory/2668-32-0x0000000074A20000-0x000000007510E000-memory.dmp

Filesize
6.9MB

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