jester | e038cd85c9da66e9517bba1e3af819a7cb1cf068fe955b8e125273d1e0533c2b

Analysis

max time kernel
120s
max time network
120s
platform
windows7_x64
resource
win7-en-20211014
submitted
04-12-2021 03:36

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General

Target

dab3afd4e25abdc582e6325f31257ee8.exe
Size

487KB
MD5

dab3afd4e25abdc582e6325f31257ee8
SHA1

88648132d7f0b1fe59da88c696016e3b1e496fa5
SHA256

e038cd85c9da66e9517bba1e3af819a7cb1cf068fe955b8e125273d1e0533c2b
SHA512

e75b6166812fa7fb5852438a8ee8b2ad0ac48ced215c1bf8990f662efb63777164a731d899ffa743baf45671f90ef2af18c87ea43c5da57b4092536948b8bfc2

Score

10^/10

jester fanyze collection spyware stealer

Malware Config

Extracted

Family

jester

Botnet

fanyze

http://jesterdcuxzbey4xvlwwheoecpltru5be2mzuk4w7a7nrhckdjjhrbyd.onion/report/fanyze

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

Mutex

f9999b04-5f6b-47c3-830e-f07171c30d02

Attributes

license_key
9A554B1F2269B7AF81AF6B074943117B

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1208	Jester.exe
1740	Tor.exe

Loads dropped DLL 11 IoCs

pid	Process
1116	dab3afd4e25abdc582e6325f31257ee8.exe
1116	dab3afd4e25abdc582e6325f31257ee8.exe
1116	dab3afd4e25abdc582e6325f31257ee8.exe
1116	dab3afd4e25abdc582e6325f31257ee8.exe
1740	Tor.exe
1740	Tor.exe
1740	Tor.exe
1740	Tor.exe
1740	Tor.exe
1740	Tor.exe
1740	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-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Jester.exe
Key opened	\REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Jester.exe
Key opened	\REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Jester.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	Jester.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Jester.exe

Modifies system certificate store 2 TTPs 4 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	Jester.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	Jester.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25	Jester.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\5FB7EE0633E259DBAD0C4C9AE6D38F1A61C7DC25\Blob = 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	Jester.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1648	PING.EXE

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1208	Jester.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1208	Jester.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1116 wrote to memory of 1208	1116	dab3afd4e25abdc582e6325f31257ee8.exe	28
PID 1116 wrote to memory of 1208	1116	dab3afd4e25abdc582e6325f31257ee8.exe	28
PID 1116 wrote to memory of 1208	1116	dab3afd4e25abdc582e6325f31257ee8.exe	28
PID 1116 wrote to memory of 1208	1116	dab3afd4e25abdc582e6325f31257ee8.exe	28
PID 1208 wrote to memory of 1316	1208	Jester.exe	30
PID 1208 wrote to memory of 1316	1208	Jester.exe	30
PID 1208 wrote to memory of 1316	1208	Jester.exe	30
PID 1316 wrote to memory of 1612	1316	cmd.exe	32
PID 1316 wrote to memory of 1612	1316	cmd.exe	32
PID 1316 wrote to memory of 1612	1316	cmd.exe	32
PID 1316 wrote to memory of 1640	1316	cmd.exe	33
PID 1316 wrote to memory of 1640	1316	cmd.exe	33
PID 1316 wrote to memory of 1640	1316	cmd.exe	33
PID 1316 wrote to memory of 1532	1316	cmd.exe	34
PID 1316 wrote to memory of 1532	1316	cmd.exe	34
PID 1316 wrote to memory of 1532	1316	cmd.exe	34
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1740	1208	Jester.exe	35
PID 1208 wrote to memory of 1568	1208	Jester.exe	37
PID 1208 wrote to memory of 1568	1208	Jester.exe	37
PID 1208 wrote to memory of 1568	1208	Jester.exe	37
PID 1568 wrote to memory of 572	1568	cmd.exe	39
PID 1568 wrote to memory of 572	1568	cmd.exe	39
PID 1568 wrote to memory of 572	1568	cmd.exe	39
PID 1568 wrote to memory of 1648	1568	cmd.exe	40
PID 1568 wrote to memory of 1648	1568	cmd.exe	40
PID 1568 wrote to memory of 1648	1568	cmd.exe	40

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Jester.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2955169046-2371869340-1800780948-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	Jester.exe

C:\Users\Admin\AppData\Local\Temp\dab3afd4e25abdc582e6325f31257ee8.exe
"C:\Users\Admin\AppData\Local\Temp\dab3afd4e25abdc582e6325f31257ee8.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1116
- C:\Users\Admin\AppData\Local\Temp\Jester.exe
  "C:\Users\Admin\AppData\Local\Temp\Jester.exe"
  2⤵
  - Executes dropped EXE
  - Accesses Microsoft Outlook profiles
  - Checks processor information in registry
  - Modifies system certificate store
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  - outlook_office_path
  - outlook_win_path
  PID:1208
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1316
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:1612
  - - C:\Windows\system32\netsh.exe
      netsh wlan show profile
      4⤵
      PID:1640
  - - C:\Windows\system32\findstr.exe
      findstr All
      4⤵
      PID:1532
- - 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:1740
- - 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\Jester.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1568
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:572
  - - C:\Windows\system32\PING.EXE
      ping 127.0.0.1
      4⤵
      Runs ping.exe
      PID:1648

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

T1130

Modify Registry

T1112

Web Service

T1102

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1116-55-0x00000000762D1000-0x00000000762D3000-memory.dmp

Filesize
8KB

Download
memory/1208-65-0x000000001A800000-0x000000001A802000-memory.dmp

Filesize
8KB

Download
memory/1208-63-0x00000000002D0000-0x00000000002D1000-memory.dmp

Filesize
4KB

Download
memory/1640-70-0x000007FEFC1D1000-0x000007FEFC1D3000-memory.dmp

Filesize
8KB

Download
memory/1740-88-0x00000000750D0000-0x00000000751CB000-memory.dmp

Filesize
1004KB

Download
memory/1740-91-0x00000000750D0000-0x00000000751CB000-memory.dmp

Filesize
1004KB

Download
memory/1740-92-0x0000000074BB0000-0x0000000074EA5000-memory.dmp

Filesize
3.0MB

Download
memory/1740-93-0x0000000074AC0000-0x0000000074BA6000-memory.dmp

Filesize
920KB

Download
memory/1740-94-0x0000000074A90000-0x0000000074AB6000-memory.dmp

Filesize
152KB

Download
memory/1740-95-0x00000000012C0000-0x00000000016D3000-memory.dmp

Filesize
4.1MB

Download
memory/1740-90-0x00000000012C0000-0x00000000016D3000-memory.dmp

Filesize
4.1MB

Download
memory/1740-89-0x0000000074A90000-0x0000000074AB6000-memory.dmp

Filesize
152KB

Download