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

Executes dropped EXE 1 IoCs

pid	Process
4664	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	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

Loads dropped DLL 8 IoCs

pid	Process
4664	Tor.exe
4664	Tor.exe
4664	Tor.exe
4664	Tor.exe
4664	Tor.exe
4664	Tor.exe
4664	Tor.exe
4664	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\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.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
7	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	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

pid	Process
3020	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2004 wrote to memory of 4644	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	80
PID 2004 wrote to memory of 4644	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	80
PID 4644 wrote to memory of 396	4644	cmd.exe	82
PID 4644 wrote to memory of 396	4644	cmd.exe	82
PID 4644 wrote to memory of 1168	4644	cmd.exe	83
PID 4644 wrote to memory of 1168	4644	cmd.exe	83
PID 4644 wrote to memory of 4764	4644	cmd.exe	84
PID 4644 wrote to memory of 4764	4644	cmd.exe	84
PID 2004 wrote to memory of 4888	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	85
PID 2004 wrote to memory of 4888	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	85
PID 4888 wrote to memory of 1396	4888	cmd.exe	87
PID 4888 wrote to memory of 1396	4888	cmd.exe	87
PID 4888 wrote to memory of 1228	4888	cmd.exe	88
PID 4888 wrote to memory of 1228	4888	cmd.exe	88
PID 4888 wrote to memory of 2332	4888	cmd.exe	89
PID 4888 wrote to memory of 2332	4888	cmd.exe	89
PID 2004 wrote to memory of 4664	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	93
PID 2004 wrote to memory of 4664	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	93
PID 2004 wrote to memory of 4664	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	93
PID 2004 wrote to memory of 4700	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	101
PID 2004 wrote to memory of 4700	2004	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe	101
PID 4700 wrote to memory of 1932	4700	cmd.exe	103
PID 4700 wrote to memory of 1932	4700	cmd.exe	103
PID 4700 wrote to memory of 3020	4700	cmd.exe	104
PID 4700 wrote to memory of 3020	4700	cmd.exe	104

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	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.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	10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe

C:\Users\Admin\AppData\Local\Temp\10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.exe
"C:\Users\Admin\AppData\Local\Temp\10c3846867f70dd26c5a54332ed22070c9e5e0e4f52f05fdae12ead801f7933b.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:2004
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4644
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:396
- - C:\Windows\system32\netsh.exe
    netsh wlan show profile
    3⤵
    PID:1168
- - C:\Windows\system32\findstr.exe
    findstr All
    3⤵
    PID:4764
- 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:4888
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1396
- - C:\Windows\system32\netsh.exe
    netsh wlan show profile name="65001" key=clear
    3⤵
    PID:1228
- - C:\Windows\system32\findstr.exe
    findstr Key
    3⤵
    PID:2332
- 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:4664
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:4700
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:1932
- - C:\Windows\system32\PING.EXE
    ping 127.0.0.1
    3⤵
    - Runs ping.exe
    PID:3020

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/2004-130-0x0000022AA7530000-0x0000022AA756E000-memory.dmp

Filesize
248KB

Download
memory/2004-133-0x0000022AC3930000-0x0000022AC3980000-memory.dmp

Filesize
320KB

Download
memory/2004-132-0x0000022AA78A0000-0x0000022AA78A2000-memory.dmp

Filesize
8KB

Download
memory/2004-131-0x00007FF8F9B20000-0x00007FF8FA5E1000-memory.dmp

Filesize
10.8MB

Download
memory/4664-151-0x0000000075870000-0x000000007596B000-memory.dmp

Filesize
1004KB

Download
memory/4664-152-0x00000000756A0000-0x00000000756C6000-memory.dmp

Filesize
152KB

Download
memory/4664-153-0x0000000000240000-0x0000000000653000-memory.dmp

Filesize
4.1MB

Download
memory/4664-154-0x0000000075870000-0x000000007596B000-memory.dmp

Filesize
1004KB

Download
memory/4664-155-0x00000000752B0000-0x00000000755A5000-memory.dmp

Filesize
3.0MB

Download
memory/4664-156-0x00000000755B0000-0x0000000075696000-memory.dmp

Filesize
920KB

Download
memory/4664-157-0x00000000756A0000-0x00000000756C6000-memory.dmp

Filesize
152KB

Download
memory/4664-158-0x0000000000240000-0x0000000000653000-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