jester | 10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b

General

Target

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Size

223KB
MD5

8879ae061540ce3de496adec3683b0fe
SHA1

4b5f73578a49ca01cc2ba7b414bcf1edfbefa079
SHA256

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b
SHA512

bf01d7738c47c1f24dab0e70643568f99b73049804a53ac23b492c80e2558aa4166a84d4c247bf3149523096a7379ca4835a24abc6de18cf38d45562e0b98da3

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
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1304 cmd.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

pid	process
1304	cmd.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Key opened	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Key opened	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.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.

Processes:

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

flow	ioc
4	ip-api.com

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

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2028 PING.EXE
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

pid process

1368 10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

description pid process

Token: SeDebugPrivilege 1368 10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

pid	process
2028	PING.EXE

pid	process
1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

description	pid	process
Token: SeDebugPrivilege	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.execmd.execmd.exe

description	pid	process	target process
PID 1368 wrote to memory of 1164	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	cmd.exe
PID 1368 wrote to memory of 1164	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	cmd.exe
PID 1368 wrote to memory of 1164	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	cmd.exe
PID 1164 wrote to memory of 1508	1164	cmd.exe	chcp.com
PID 1164 wrote to memory of 1508	1164	cmd.exe	chcp.com
PID 1164 wrote to memory of 1508	1164	cmd.exe	chcp.com
PID 1164 wrote to memory of 1844	1164	cmd.exe	netsh.exe
PID 1164 wrote to memory of 1844	1164	cmd.exe	netsh.exe
PID 1164 wrote to memory of 1844	1164	cmd.exe	netsh.exe
PID 1164 wrote to memory of 916	1164	cmd.exe	findstr.exe
PID 1164 wrote to memory of 916	1164	cmd.exe	findstr.exe
PID 1164 wrote to memory of 916	1164	cmd.exe	findstr.exe
PID 1368 wrote to memory of 1304	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	cmd.exe
PID 1368 wrote to memory of 1304	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	cmd.exe
PID 1368 wrote to memory of 1304	1368	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	cmd.exe
PID 1304 wrote to memory of 1756	1304	cmd.exe	chcp.com
PID 1304 wrote to memory of 1756	1304	cmd.exe	chcp.com
PID 1304 wrote to memory of 1756	1304	cmd.exe	chcp.com
PID 1304 wrote to memory of 2028	1304	cmd.exe	PING.EXE
PID 1304 wrote to memory of 2028	1304	cmd.exe	PING.EXE
PID 1304 wrote to memory of 2028	1304	cmd.exe	PING.EXE

outlook_office_path 1 IoCs

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

outlook_win_path 1 IoCs

Processes:

10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-2329389628-4064185017-3901522362-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

C:\Users\Admin\AppData\Local\Temp\10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
"C:\Users\Admin\AppData\Local\Temp\10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe"
1⤵
- 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:1368
- C:\Windows\system32\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1164
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1508
- - C:\Windows\system32\netsh.exe
    netsh wlan show profile
    3⤵
    PID:1844
- - C:\Windows\system32\findstr.exe
    findstr All
    3⤵
    PID:916
- 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\10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe"
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1304
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1756
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:2028

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1368-55-0x000007FEF4F50000-0x000007FEF593C000-memory.dmp

Filesize
9.9MB

Download
memory/1368-56-0x00000000008A0000-0x00000000008DE000-memory.dmp

Filesize
248KB

Download
memory/1368-57-0x00000000021F0000-0x00000000021F2000-memory.dmp

Filesize
8KB

Download
memory/1844-58-0x000007FEFBC01000-0x000007FEFBC03000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads