cycbot | b16a28d34d9c9a80d9b7a85559204a414e40c782fd207f9d11e802c27d8404bd

General

Target

JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe
Size

170KB
MD5

74cf7a039e3a741e80a389c0d90573ec
SHA1

526de209ec1ae519702e4635ad4358fb7486abd8
SHA256

b16a28d34d9c9a80d9b7a85559204a414e40c782fd207f9d11e802c27d8404bd
SHA512

3bff23f4f7eea05b2f3faacbb79d2ba158cd25504677efceddb777aa63dfa090b361d114b3e26010c2b08cc631dba4db0bb06d4cd7f09a16f1b0feecc470f48e
SSDEEP

3072:Z6U6L2EKLpEtuw0DRx/z0vyIJyXjijoHoHe4wgUocbd29JwgQ1oqEYuXt5uNZ8xn:Z6zL2EK4GTHIJyTikiXUXR29JLQ1REzM

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 6 IoCs

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

resource	yara_rule
behavioral1/memory/2632-15-0x0000000000400000-0x0000000000491000-memory.dmp	family_cycbot
behavioral1/memory/1756-16-0x0000000000400000-0x000000000048E000-memory.dmp	family_cycbot
behavioral1/memory/1756-17-0x0000000000400000-0x0000000000491000-memory.dmp	family_cycbot
behavioral1/memory/1756-74-0x0000000000400000-0x0000000000491000-memory.dmp	family_cycbot
behavioral1/memory/2672-76-0x0000000000400000-0x0000000000491000-memory.dmp	family_cycbot
behavioral1/memory/1756-181-0x0000000000400000-0x0000000000491000-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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\65AB1\\E4023.exe"	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.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/1756-2-0x0000000000400000-0x0000000000491000-memory.dmp	upx
behavioral1/memory/2632-13-0x0000000000400000-0x0000000000491000-memory.dmp	upx
behavioral1/memory/2632-15-0x0000000000400000-0x0000000000491000-memory.dmp	upx
behavioral1/memory/1756-16-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/1756-17-0x0000000000400000-0x0000000000491000-memory.dmp	upx
behavioral1/memory/1756-74-0x0000000000400000-0x0000000000491000-memory.dmp	upx
behavioral1/memory/2672-76-0x0000000000400000-0x0000000000491000-memory.dmp	upx
behavioral1/memory/1756-181-0x0000000000400000-0x0000000000491000-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_74cf7a039e3a741e80a389c0d90573ec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1756 wrote to memory of 2632	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	31
PID 1756 wrote to memory of 2632	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	31
PID 1756 wrote to memory of 2632	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	31
PID 1756 wrote to memory of 2632	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	31
PID 1756 wrote to memory of 2672	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	33
PID 1756 wrote to memory of 2672	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	33
PID 1756 wrote to memory of 2672	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	33
PID 1756 wrote to memory of 2672	1756	JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe	33

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1756
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe startC:\Program Files (x86)\LP\2316\933.exe%C:\Program Files (x86)\LP\2316
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2632
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_74cf7a039e3a741e80a389c0d90573ec.exe startC:\Program Files (x86)\B1F9A\lvvm.exe%C:\Program Files (x86)\B1F9A
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2672

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\65AB1\1F9A.5AB

Filesize
1KB

MD5
d2a6d2508e07c7b3f74ae48aab485c1e

SHA1
30ac544f8714da1836c2c019f834a05cc3f466df

SHA256
035b884ec029f30c3658d5c75d4f7c068040fb855cdacee5c21c0e67b4c7cf25

SHA512
581d6f7bd323686171294cb13e498aa0e6a85e3234b61574b99646e8f73f3a24e5eb7aefbb684790a2c5f768ad4eb52180bddc53d1aec9b224d2185ca5e1f701

Download Submit
C:\Users\Admin\AppData\Roaming\65AB1\1F9A.5AB

Filesize
600B

MD5
9735fe2cf9b77835cc349e2e7c57fc32

SHA1
795366f798f7ce78652e3fdb46f0c1ee6e157889

SHA256
a32662739a14eca7f246e898a87fb4250a01968ab46efe7e533bd3203de0d582

SHA512
fd75b39fc0ef4ec711ddc7d7677cf52db2369f31526a91db12def3aca29de1688f283db72f2ae80e7d028cfa6370a0e5ec458bdaacbe7e7dcc1bb0548b450b3c

Download Submit
C:\Users\Admin\AppData\Roaming\65AB1\1F9A.5AB

Filesize
996B

MD5
bd5a8ef96bda948d617f6482ca2bf663

SHA1
63d04ebe04c28da3a0a74a8a0ede8eb79935127b

SHA256
e9325b45a775aadd8bc65e448d47cd2a59e4689faf4f8ef588fb0fbe0cc9400c

SHA512
0a1d31fe30d65d50a471feaa5a29fc62bc0d5ea482b8cd2e4e38b70455c29b41d8c5adba4eeabe31add06afd326897a516e5cc6b5a8f04bb562d73e6a5972b12

Download Submit
memory/1756-2-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1756-181-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1756-1-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1756-16-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1756-17-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/1756-74-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/2632-13-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/2632-15-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/2632-12-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download
memory/2672-76-0x0000000000400000-0x0000000000491000-memory.dmp

Filesize
580KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads