jester | 2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea

Analysis

max time kernel
122s
max time network
124s
platform
windows7_x64
resource
win7-en-20211208
submitted
16-12-2021 18:32

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe
Size

1.7MB
MD5

bb9e3c71b3ee3279632905f905ac21c4
SHA1

a2b1d81ec6a21b52f555f5ec7e9cf9a73f937971
SHA256

2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea
SHA512

f63faf0d317fa32fa9e091dfb0327752433c94c2d8171ef1d4b988288012de2062c89c37c87513873010e7ea78e71d54981ca17cec333222eb9ad9bbb9600916

Score

10^/10

jester ads555man collection stealer

Malware Config

Extracted

Family

jester

Botnet

ads555man

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
1724	Tor.exe

Loads dropped DLL 9 IoCs

pid	Process
1704	CasPol.exe
1704	CasPol.exe
1724	Tor.exe
1724	Tor.exe
1724	Tor.exe
1724	Tor.exe
1724	Tor.exe
1724	Tor.exe
1724	Tor.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1584 set thread context of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27

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	CasPol.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	CasPol.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
320	PING.EXE

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe
1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe
1704	CasPol.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe
Token: SeDebugPrivilege	1704	CasPol.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1584 wrote to memory of 1704	1584	2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe	27
PID 1704 wrote to memory of 1988	1704	CasPol.exe	29
PID 1704 wrote to memory of 1988	1704	CasPol.exe	29
PID 1704 wrote to memory of 1988	1704	CasPol.exe	29
PID 1704 wrote to memory of 1988	1704	CasPol.exe	29
PID 1988 wrote to memory of 364	1988	cmd.exe	31
PID 1988 wrote to memory of 364	1988	cmd.exe	31
PID 1988 wrote to memory of 364	1988	cmd.exe	31
PID 1988 wrote to memory of 364	1988	cmd.exe	31
PID 1988 wrote to memory of 1540	1988	cmd.exe	32
PID 1988 wrote to memory of 1540	1988	cmd.exe	32
PID 1988 wrote to memory of 1540	1988	cmd.exe	32
PID 1988 wrote to memory of 1540	1988	cmd.exe	32
PID 1988 wrote to memory of 1252	1988	cmd.exe	33
PID 1988 wrote to memory of 1252	1988	cmd.exe	33
PID 1988 wrote to memory of 1252	1988	cmd.exe	33
PID 1988 wrote to memory of 1252	1988	cmd.exe	33
PID 1704 wrote to memory of 1724	1704	CasPol.exe	34
PID 1704 wrote to memory of 1724	1704	CasPol.exe	34
PID 1704 wrote to memory of 1724	1704	CasPol.exe	34
PID 1704 wrote to memory of 1724	1704	CasPol.exe	34
PID 1704 wrote to memory of 1160	1704	CasPol.exe	36
PID 1704 wrote to memory of 1160	1704	CasPol.exe	36
PID 1704 wrote to memory of 1160	1704	CasPol.exe	36
PID 1704 wrote to memory of 1160	1704	CasPol.exe	36
PID 1160 wrote to memory of 836	1160	cmd.exe	38
PID 1160 wrote to memory of 836	1160	cmd.exe	38
PID 1160 wrote to memory of 836	1160	cmd.exe	38
PID 1160 wrote to memory of 836	1160	cmd.exe	38
PID 1160 wrote to memory of 320	1160	cmd.exe	39
PID 1160 wrote to memory of 320	1160	cmd.exe	39
PID 1160 wrote to memory of 320	1160	cmd.exe	39
PID 1160 wrote to memory of 320	1160	cmd.exe	39

outlook_office_path 1 IoCs

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

outlook_win_path 1 IoCs

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	CasPol.exe

C:\Users\Admin\AppData\Local\Temp\2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe
"C:\Users\Admin\AppData\Local\Temp\2f60704e2dac47d532955485a04c195dffa41f9e638527ac42c82a224b2202ea.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1584
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
  2⤵
  - Loads dropped DLL
  - 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:1704
- - C:\Windows\SysWOW64\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1988
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:364
  - - C:\Windows\SysWOW64\netsh.exe
      netsh wlan show profile
      4⤵
      PID:1540
  - - C:\Windows\SysWOW64\findstr.exe
      findstr All
      4⤵
      PID:1252
- - C:\Users\Admin\AppData\Local\Temp\Tor\Tor.exe
    "C:\Users\Admin\AppData\Local\Temp\Tor\Tor.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    PID:1724
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /C chcp 65001 && ping 127.0.0.1 && DEL /F /S /Q /A "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1160
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:836
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1
      4⤵
      Runs ping.exe
      PID:320

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1584-59-0x00000000005C0000-0x0000000000601000-memory.dmp

Filesize
260KB

Download
memory/1584-61-0x00000000006D0000-0x00000000006E9000-memory.dmp

Filesize
100KB

Download
memory/1584-56-0x0000000000220000-0x0000000000223000-memory.dmp

Filesize
12KB

Download
memory/1584-55-0x00000000013B0000-0x00000000013B1000-memory.dmp

Filesize
4KB

Download
memory/1584-57-0x0000000000270000-0x00000000002B5000-memory.dmp

Filesize
276KB

Download
memory/1584-60-0x0000000000B50000-0x0000000000B88000-memory.dmp

Filesize
224KB

Download
memory/1584-62-0x00000000006D0000-0x00000000006EB000-memory.dmp

Filesize
108KB

Download
memory/1584-58-0x0000000000D90000-0x0000000000D91000-memory.dmp

Filesize
4KB

Download
memory/1704-66-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1704-65-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1704-72-0x00000000021E0000-0x00000000021E1000-memory.dmp

Filesize
4KB

Download
memory/1704-70-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1704-64-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1704-69-0x0000000075DF1000-0x0000000075DF3000-memory.dmp

Filesize
8KB

Download
memory/1704-63-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1704-67-0x0000000000400000-0x000000000043E000-memory.dmp

Filesize
248KB

Download
memory/1724-99-0x000000006FDE0000-0x000000006FEDB000-memory.dmp

Filesize
1004KB

Download
memory/1724-98-0x000000006FF00000-0x000000006FF26000-memory.dmp

Filesize
152KB

Download
memory/1724-101-0x0000000000E30000-0x0000000001243000-memory.dmp

Filesize
4.1MB

Download
memory/1724-104-0x000000006FF00000-0x000000006FF26000-memory.dmp

Filesize
152KB

Download
memory/1724-103-0x000000006F800000-0x000000006F8E6000-memory.dmp

Filesize
920KB

Download
memory/1724-102-0x0000000000E30000-0x0000000001243000-memory.dmp

Filesize
4.1MB

Download
memory/1724-100-0x000000006F8F0000-0x000000006FBE5000-memory.dmp

Filesize
3.0MB

Download
memory/1724-97-0x000000006FDE0000-0x000000006FEDB000-memory.dmp

Filesize
1004KB

Download