cycbot | 40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4

General

Target

40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe
Size

176KB
MD5

0af30a7eb44ccfd5632bce6dac15cdd9
SHA1

fe1eb7393be58456d9e2044200b4813d9d1f669d
SHA256

40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4
SHA512

15790ecb6edc2a19f929cdde9ed82158a3a238c651156a1d2282bf5d6fda5838b39819830e5b1edea150feade96b9944bc39b83325736c2af3b71c1e36109d24
SSDEEP

3072:bRC/UmzULMWQzL8+j+Fegyht8y7dTMiT5NrAvLs0pne8gRQL:NPmAMWKo+S0rv8ytMsrAvIbRQL

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/2148-14-0x0000000000400000-0x000000000046C000-memory.dmp	family_cycbot
behavioral1/memory/2192-15-0x0000000000400000-0x000000000046C000-memory.dmp	family_cycbot
behavioral1/memory/2192-88-0x0000000000400000-0x000000000046C000-memory.dmp	family_cycbot
behavioral1/memory/1032-91-0x0000000000400000-0x000000000046C000-memory.dmp	family_cycbot
behavioral1/memory/2192-167-0x0000000000400000-0x000000000046C000-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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.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/2192-2-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/2148-12-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/2148-14-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/2192-15-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/2192-88-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/1032-90-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/1032-91-0x0000000000400000-0x000000000046C000-memory.dmp	upx
behavioral1/memory/2192-167-0x0000000000400000-0x000000000046C000-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	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 2148	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	31
PID 2192 wrote to memory of 2148	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	31
PID 2192 wrote to memory of 2148	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	31
PID 2192 wrote to memory of 2148	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	31
PID 2192 wrote to memory of 1032	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	33
PID 2192 wrote to memory of 1032	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	33
PID 2192 wrote to memory of 1032	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	33
PID 2192 wrote to memory of 1032	2192	40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe	33

C:\Users\Admin\AppData\Local\Temp\40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe
"C:\Users\Admin\AppData\Local\Temp\40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2192
- C:\Users\Admin\AppData\Local\Temp\40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe
  C:\Users\Admin\AppData\Local\Temp\40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2148
- C:\Users\Admin\AppData\Local\Temp\40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe
  C:\Users\Admin\AppData\Local\Temp\40776c58e14177edf86f34704c7dfd64977afe33fe6eb15af67c48727192dce4.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1032

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\9351.171

Filesize
600B

MD5
db1c624fb0ad360df9607b4cf1e81c9a

SHA1
5a961b8652eba33041551b310628084a6039330c

SHA256
77fb9617dbf2973c72b0a7b02c9f1822d7dda82e9759272366e29df8a49f97b9

SHA512
6fd8ab7f5ad2c1cff076bc2d3bed0156a717c317fb9c84d1dff503a4af90f06b9d552df16229a80af90fc21a2207df364ee3303e8e8e8642b6b8b42bc14e5613

Download Submit
C:\Users\Admin\AppData\Roaming\9351.171

Filesize
996B

MD5
286a21db1eaa050a0613c578931b4d48

SHA1
25ab09ebf7815a0dfed027190db3080b0c6429f7

SHA256
2eb27118ba19e25242586e0b13efc328b49569778bcb6acef16be4e4dc1487a5

SHA512
3f1240a19cef0a20cd32966f6d470539c52036ff3282cc1d23131e2e07a98c01ff4b23a51512d611dc7b0ab64f21ba38609a1a2bf4451d1340d8721ea3eddfa9

Download Submit
memory/1032-90-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/1032-91-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2148-12-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2148-14-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2192-1-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2192-2-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2192-15-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2192-88-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download
memory/2192-167-0x0000000000400000-0x000000000046C000-memory.dmp

Filesize
432KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads