agenttesla | 491c807f26e695af9ea8cb18cfbee96446d4f6703f774269a36cd887561dae8d

General

Target

SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Size

9KB
MD5

fd3c284eb862dfd89e4ea9c3188184b0
SHA1

99b066e1b2bb568fb6d1813a2e06970cf164aec1
SHA256

491c807f26e695af9ea8cb18cfbee96446d4f6703f774269a36cd887561dae8d
SHA512

3a455fbd2dda97ee0afdbe55c4fc0f08aa2444c9a246d5b8f44709b276abf52fee7f9285099314b0afa4cedac194effe5d6d9e9c9255c31c95a1dc6c31571e74
SSDEEP

192:K0E+Ig32cL1UuZRSrTW/2c8stYcFmVc03KY:K0E+Ig32cLWISrTWOcptYcFmVc03K

Score

10^/10

agenttesla quasar nov collection keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Nov

C2

37.139.128.94:5000

Mutex

QSR_MUTEX_eZnYtXesrHquJP9u21

Attributes

encryption_key
cnjVAVdqAEtq3rq2N0WD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/2456-160-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
3668	Vfkxoptombfioubttqtvzsu.exe
2456	Vfkxoptombfioubttqtvzsu.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Vfkxoptombfioubttqtvzsu.exe

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
T1081
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
T1081
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
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Aojxzl = "\"C:\\Users\\Admin\\AppData\\Roaming\\Fqqzc\\Aojxzl.exe\""	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Aojxzl = "\"C:\\Users\\Admin\\AppData\\Roaming\\Fqqzc\\Aojxzl.exe\""	Vfkxoptombfioubttqtvzsu.exe

Looks up external IP address via web service 3 IoCs

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

flow	ioc
39	api.ipify.org
40	api.ipify.org
44	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 384 set thread context of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 3668 set thread context of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
820	powershell.exe
820	powershell.exe
3720	powershell.exe
3720	powershell.exe
1004	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
1004	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
1004	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Token: SeDebugPrivilege	820	powershell.exe
Token: SeDebugPrivilege	3668	Vfkxoptombfioubttqtvzsu.exe
Token: SeDebugPrivilege	1004	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
Token: SeDebugPrivilege	3720	powershell.exe
Token: SeDebugPrivilege	2456	Vfkxoptombfioubttqtvzsu.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2456	Vfkxoptombfioubttqtvzsu.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 820	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	79
PID 384 wrote to memory of 820	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	79
PID 384 wrote to memory of 820	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	79
PID 384 wrote to memory of 3668	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	88
PID 384 wrote to memory of 3668	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	88
PID 384 wrote to memory of 3668	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	88
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 384 wrote to memory of 1004	384	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe	89
PID 3668 wrote to memory of 3720	3668	Vfkxoptombfioubttqtvzsu.exe	90
PID 3668 wrote to memory of 3720	3668	Vfkxoptombfioubttqtvzsu.exe	90
PID 3668 wrote to memory of 3720	3668	Vfkxoptombfioubttqtvzsu.exe	90
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92
PID 3668 wrote to memory of 2456	3668	Vfkxoptombfioubttqtvzsu.exe	92

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:384
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:820
- C:\Users\Admin\AppData\Local\Temp\Vfkxoptombfioubttqtvzsu.exe
  "C:\Users\Admin\AppData\Local\Temp\Vfkxoptombfioubttqtvzsu.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3668
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3720
- - C:\Users\Admin\AppData\Local\Temp\Vfkxoptombfioubttqtvzsu.exe
    C:\Users\Admin\AppData\Local\Temp\Vfkxoptombfioubttqtvzsu.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2456
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
  C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1004

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

3

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\SecuriteInfo.com.Trojan.DownLoaderNET.495.22282.26470.exe.log

Filesize
1KB

MD5
026fb31495d30e5dbfd00f398c2efbf8

SHA1
9cda8f5f58129e4d592ca1b9867835c86f38ab1b

SHA256
b008f16eeae90b4c6ba119fb308616c0795cdaca51adf2b64470a0c01aeeb8b7

SHA512
6d1cc01c90613522cfb7be7ea67ff03732b367dfc7bfd245ad6d7ea8e5e5def431b3339d17893b7b193cee2c3b4c22a459acd3d852ee88fce711e30c5af195a1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Vfkxoptombfioubttqtvzsu.exe.log

Filesize
1KB

MD5
026fb31495d30e5dbfd00f398c2efbf8

SHA1
9cda8f5f58129e4d592ca1b9867835c86f38ab1b

SHA256
b008f16eeae90b4c6ba119fb308616c0795cdaca51adf2b64470a0c01aeeb8b7

SHA512
6d1cc01c90613522cfb7be7ea67ff03732b367dfc7bfd245ad6d7ea8e5e5def431b3339d17893b7b193cee2c3b4c22a459acd3d852ee88fce711e30c5af195a1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
0f53674af0c42551f18bc45e0b21bf4c

SHA1
2a9020c08a5ffddc575f47aa0a6cb3b2afc16105

SHA256
3a3d70d7800b5170d3112cfdc66b3b8a021c167f8e33eb1e10235d6aec961c4e

SHA512
a3209e5ce88836811c39a15713d74c4cf868da3c2da9fc8b0f52a3e1ab3ffde1cf9e3cbf6b8c2c2f9507c25d8a4a1d58c9b8c846dcc2bf8626bcae0ef71cf457

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
3994c504d75aa4ad59c718b2f0d2d44c

SHA1
e597e6dbe7f691412769b688e2d39f63339eca04

SHA256
231667a2278c5283712257ffb5b45ade707a356e375ce32bb750974c11de52f3

SHA512
653860d40560ddf328d2e5a2beb6ab9e1699c2ebe377d76a5c251f77a7323ed7dceb85a2e8e776290bde8f9a75c60817878475f781254fc2065c8e013b310173

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

Filesize
10KB

MD5
0e57c129a02db3868073f0599d116add

SHA1
2ade42da4df63238869acf8cc1cde7392cd9c225

SHA256
7f16d3351df72f2f49118adc25ca967e5e7e9e942b7da024b63e88d8b224c9b4

SHA512
964e7e5a9c2d39dc783ababba54d44b98411da6aa9bdb0cc40947fd85a2774a3a8461ec25b79e3387f4fab7e51194f4d8b4ac7b00c356dafe3de221041fa01bf

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

Filesize
10KB

MD5
0e57c129a02db3868073f0599d116add

SHA1
2ade42da4df63238869acf8cc1cde7392cd9c225

SHA256
7f16d3351df72f2f49118adc25ca967e5e7e9e942b7da024b63e88d8b224c9b4

SHA512
964e7e5a9c2d39dc783ababba54d44b98411da6aa9bdb0cc40947fd85a2774a3a8461ec25b79e3387f4fab7e51194f4d8b4ac7b00c356dafe3de221041fa01bf

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

Filesize
10KB

MD5
0e57c129a02db3868073f0599d116add

SHA1
2ade42da4df63238869acf8cc1cde7392cd9c225

SHA256
7f16d3351df72f2f49118adc25ca967e5e7e9e942b7da024b63e88d8b224c9b4

SHA512
964e7e5a9c2d39dc783ababba54d44b98411da6aa9bdb0cc40947fd85a2774a3a8461ec25b79e3387f4fab7e51194f4d8b4ac7b00c356dafe3de221041fa01bf

Download Submit
memory/384-135-0x0000000005E70000-0x0000000005E92000-memory.dmp

Filesize
136KB

Download
memory/384-132-0x0000000000770000-0x0000000000778000-memory.dmp

Filesize
32KB

Download
memory/384-134-0x00000000063F0000-0x0000000006994000-memory.dmp

Filesize
5.6MB

Download
memory/384-133-0x0000000005DA0000-0x0000000005E32000-memory.dmp

Filesize
584KB

Download
memory/820-137-0x0000000004CC0000-0x0000000004CF6000-memory.dmp

Filesize
216KB

Download
memory/820-143-0x0000000006770000-0x000000000678A000-memory.dmp

Filesize
104KB

Download
memory/820-142-0x00000000078F0000-0x0000000007F6A000-memory.dmp

Filesize
6.5MB

Download
memory/820-141-0x0000000006280000-0x000000000629E000-memory.dmp

Filesize
120KB

Download
memory/820-140-0x0000000005C70000-0x0000000005CD6000-memory.dmp

Filesize
408KB

Download
memory/820-139-0x0000000005AD0000-0x0000000005B36000-memory.dmp

Filesize
408KB

Download
memory/820-138-0x0000000005330000-0x0000000005958000-memory.dmp

Filesize
6.2MB

Download
memory/820-136-0x0000000000000000-mapping.dmp

Download
memory/1004-148-0x0000000000000000-mapping.dmp

Download
memory/1004-155-0x0000000005560000-0x00000000055FC000-memory.dmp

Filesize
624KB

Download
memory/1004-156-0x0000000006CD0000-0x0000000006D20000-memory.dmp

Filesize
320KB

Download
memory/1004-157-0x0000000006DF0000-0x0000000006DFA000-memory.dmp

Filesize
40KB

Download
memory/1004-149-0x0000000000400000-0x000000000043C000-memory.dmp

Filesize
240KB

Download
memory/2456-159-0x0000000000000000-mapping.dmp

Download
memory/2456-160-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2456-163-0x0000000005E30000-0x0000000005E42000-memory.dmp

Filesize
72KB

Download
memory/2456-164-0x0000000006390000-0x00000000063CC000-memory.dmp

Filesize
240KB

Download
memory/3668-147-0x0000000000200000-0x0000000000208000-memory.dmp

Filesize
32KB

Download
memory/3668-144-0x0000000000000000-mapping.dmp

Download
memory/3720-151-0x0000000000000000-mapping.dmp

Download

Analysis

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