jester | 4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6

General

Target

4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe
Size

494KB
MD5

d01656def63636c082785db6d61fb415
SHA1

96102ea313063db1179792d65cd15af877d2f5d0
SHA256

4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6
SHA512

1e27c2b2bacac3e6b9994c4de8bef20d9af1b783d668cfa8896bc7822c739e969dba64db0629a245398a0bb324575f1009bca6e51fbf0701fe1dea798d68edc7

Score

10^/10

jester ads555man collection spyware stealer

Malware Config

Extracted

Family

jester

Botnet

ads555man

C2

http://jesterdcuxzbey4xvlwwheoecpltru5be2mzuk4w7a7nrhckdjjhrbyd.onion/report/ads555man

https://api.anonfiles.com/upload?token=d26d620842507144

Mutex

efbb42d7-d0db-4f16-a194-3d9d9d1fc654

Attributes

license_key
65EEBAF23D4744267D131CD5BA37E706

Signatures

Jester
Jester is an information stealer malware written in C#.
stealer jester

Executes dropped EXE 1 IoCs

pid	Process
2672	Tor.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

Loads dropped DLL 9 IoCs

pid	Process
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe
2672	Tor.exe

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-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102

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
4	ip-api.com

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4772	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 1516 wrote to memory of 5000	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	81
PID 1516 wrote to memory of 5000	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	81
PID 5000 wrote to memory of 4560	5000	cmd.exe	83
PID 5000 wrote to memory of 4560	5000	cmd.exe	83
PID 5000 wrote to memory of 404	5000	cmd.exe	84
PID 5000 wrote to memory of 404	5000	cmd.exe	84
PID 5000 wrote to memory of 1748	5000	cmd.exe	85
PID 5000 wrote to memory of 1748	5000	cmd.exe	85
PID 1516 wrote to memory of 3168	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	86
PID 1516 wrote to memory of 3168	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	86
PID 3168 wrote to memory of 4920	3168	cmd.exe	88
PID 3168 wrote to memory of 4920	3168	cmd.exe	88
PID 3168 wrote to memory of 4652	3168	cmd.exe	89
PID 3168 wrote to memory of 4652	3168	cmd.exe	89
PID 3168 wrote to memory of 336	3168	cmd.exe	90
PID 3168 wrote to memory of 336	3168	cmd.exe	90
PID 1516 wrote to memory of 2672	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	91
PID 1516 wrote to memory of 2672	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	91
PID 1516 wrote to memory of 2672	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	91
PID 1516 wrote to memory of 3744	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	102
PID 1516 wrote to memory of 3744	1516	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe	102
PID 3744 wrote to memory of 4088	3744	cmd.exe	104
PID 3744 wrote to memory of 4088	3744	cmd.exe	104
PID 3744 wrote to memory of 4772	3744	cmd.exe	105
PID 3744 wrote to memory of 4772	3744	cmd.exe	105

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe

C:\Users\Admin\AppData\Local\Temp\4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe
"C:\Users\Admin\AppData\Local\Temp\4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe"
1⤵
- Checks computer location settings
- Accesses Microsoft Outlook profiles
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:1516
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:5000
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4560
- - C:\Windows\system32\netsh.exe
    netsh wlan show profile
    3⤵
    PID:404
- - C:\Windows\system32\findstr.exe
    findstr All
    3⤵
    PID:1748
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile name="65001" key=clear | findstr Key
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3168
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4920
- - C:\Windows\system32\netsh.exe
    netsh wlan show profile name="65001" key=clear
    3⤵
    PID:4652
- - C:\Windows\system32\findstr.exe
    findstr Key
    3⤵
    PID:336
- C:\Users\Admin\AppData\Local\Temp\Tor\Tor.exe
  "C:\Users\Admin\AppData\Local\Temp\Tor\Tor.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  PID:2672
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && DEL /F /S /Q /A "C:\Users\Admin\AppData\Local\Temp\4417195f416e6bd019c0982978bf1f00c0c848e5ac2e020f278629bbe21266b6.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3744
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:4088
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:4772

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

1

T1102

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

3

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

memory/1516-133-0x000001E5796B0000-0x000001E579700000-memory.dmp

Filesize
320KB

Download
memory/1516-130-0x000001E5764E0000-0x000001E57651E000-memory.dmp

Filesize
248KB

Download
memory/1516-131-0x00007FFC2C5F0000-0x00007FFC2D0B1000-memory.dmp

Filesize
10.8MB

Download
memory/1516-132-0x000001E579770000-0x000001E579772000-memory.dmp

Filesize
8KB

Download
memory/2672-152-0x0000000074EE0000-0x0000000074FDB000-memory.dmp

Filesize
1004KB

Download
memory/2672-153-0x0000000074CD0000-0x0000000074CF6000-memory.dmp

Filesize
152KB

Download
memory/2672-154-0x0000000000A80000-0x0000000000E93000-memory.dmp

Filesize
4.1MB

Download
memory/2672-155-0x0000000074EE0000-0x0000000074FDB000-memory.dmp

Filesize
1004KB

Download
memory/2672-156-0x00000000749D0000-0x0000000074CC5000-memory.dmp

Filesize
3.0MB

Download
memory/2672-157-0x00000000748E0000-0x00000000749C6000-memory.dmp

Filesize
920KB

Download
memory/2672-158-0x0000000074CD0000-0x0000000074CF6000-memory.dmp

Filesize
152KB

Download
memory/2672-159-0x0000000000A80000-0x0000000000E93000-memory.dmp

Filesize
4.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads