cycbot | 66a2444b0af09d949fe609746d6ae8a064faea15d0f5c06383b6aa27731f8783

General

Target

JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
Size

182KB
MD5

a2a4457cabf47bdd7b0da0bbc351b0ec
SHA1

341eadfbb0114372700fe0d19830ff476c0fa67c
SHA256

66a2444b0af09d949fe609746d6ae8a064faea15d0f5c06383b6aa27731f8783
SHA512

f8dc1fd90fd4ee1585c4f21e8d5abe1cee75b7ff22d8b245ee0ecb48806862cf52ac7a745ec2bfb8ca055fe11cda1554cdc7679cb5d47af5654eb5960645feb6
SSDEEP

3072:WDpoB9Zj/CeB7CsVyttsw89wHFTU9kseI8HCSVgcA8UTPwgmtEhT57lIv0G1PIT:WiB9Zj/P3Vyttsm49ksetdETPEtEzRIU

Score

10^/10

cycbot backdoor discovery persistence rat spyware stealer upx

Malware Config

Signatures

Cycbot
Cycbot is a backdoor and trojan written in C++..
backdoor rat cycbot
Cycbot family
cycbot

Detects Cycbot payload 5 IoCs

Cycbot is a backdoor and trojan written in C++.

resource	yara_rule
behavioral1/memory/2136-15-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2080-16-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2080-83-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/1804-85-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2080-165-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/2080-2-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2136-13-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2136-12-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2136-15-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2080-16-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2080-83-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/1804-85-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2080-165-0x0000000000400000-0x0000000000490000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2080 wrote to memory of 2136	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	31
PID 2080 wrote to memory of 2136	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	31
PID 2080 wrote to memory of 2136	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	31
PID 2080 wrote to memory of 2136	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	31
PID 2080 wrote to memory of 1804	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	32
PID 2080 wrote to memory of 1804	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	32
PID 2080 wrote to memory of 1804	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	32
PID 2080 wrote to memory of 1804	2080	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2080
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2136
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\0836.BC2

Filesize
1KB

MD5
c85426b8d20ffec284ecab74b65ae211

SHA1
c7d719c5ca414373bd751b5973c2fd52231aa947

SHA256
8a0211ef44ba96b10a5ec3efd9eb9c85d3bfa1e88189fbec4485514bf7ad0ff6

SHA512
359b6da60a332c38391a0fd3818aaae8357c6bfcfd95d077ccfde1e0a9c5bd5f03d91625a755a3ef70c603db801e902c768668c406f69e37bc6ee7cbfba4f8b6

Download Submit
C:\Users\Admin\AppData\Roaming\0836.BC2

Filesize
600B

MD5
b27f5b4e99fa44b9970c33b3dc85a53f

SHA1
780f96fa8b6686ab4731077b1184158452bcb134

SHA256
1ff6974544f27c0a729fff38062910ccd6e0285e9812ec0181e88a40e344ce3a

SHA512
c19f9f0abb54365528da391db72db08f1798d061cfd50a88ba16f730048e0b41f623dfe9f4b89684b15242f55a92a62bc7441ac07a46b6067be41af32b0bfa5b

Download Submit
C:\Users\Admin\AppData\Roaming\0836.BC2

Filesize
996B

MD5
64f6a34835014b8314dacbb77231b36d

SHA1
778f16e13f337cef9611103bc5683c352201b23b

SHA256
996c12e2796a07171151214e6058ed6677230d4712fa776a9d15f0b7e7854059

SHA512
60526913b334426bf5a7c8d9da67ec246925f73cf28467a6225f66927544a1991d54ec955b8deb3dc7fa4d6bc6ba34692cd15302b3e7653272fc4b78f1a45c2a

Download Submit
memory/1804-85-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2080-1-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2080-2-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2080-16-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2080-83-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2080-165-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2136-13-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2136-12-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2136-15-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads