cycbot | b1e5c7732d71ae8440eb719c4a1e5de60da6a367f35f4b7cd629b2b9e85c03e6

General

Target

e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe
Size

177KB
MD5

e50766c294f43e3d17f597db6d6ea0e0
SHA1

92f0417754bc88da5d4a9f341f14152f37219d54
SHA256

b1e5c7732d71ae8440eb719c4a1e5de60da6a367f35f4b7cd629b2b9e85c03e6
SHA512

57e184eca11d7eec3b9e48a1f9c66efa1d20c980a24ed100ef70e044c2d34a37c8bd73064300b89da50fb527affc03f1346ef8792856c19e35f487c618d18ce0
SSDEEP

3072:auPaKqI+QD3jtWowyQUDSInoh0Spdz2d2pxw/VVjiSBWB3QR2dosDS0:auPaLI+QrjQoYUD1nOzzYWBcKx

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/2148-8-0x0000000000400000-0x0000000000486000-memory.dmp	family_cycbot
behavioral1/memory/908-18-0x0000000000400000-0x0000000000486000-memory.dmp	family_cycbot
behavioral1/memory/1064-78-0x0000000000400000-0x0000000000486000-memory.dmp	family_cycbot
behavioral1/memory/908-79-0x0000000000400000-0x0000000000486000-memory.dmp	family_cycbot
behavioral1/memory/908-158-0x0000000000400000-0x0000000000486000-memory.dmp	family_cycbot
behavioral1/memory/908-193-0x0000000000400000-0x0000000000486000-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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.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 9 IoCs

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

upx

resource	yara_rule
behavioral1/memory/908-2-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/2148-8-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/2148-7-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/908-18-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/1064-76-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/1064-78-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/908-79-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/908-158-0x0000000000400000-0x0000000000486000-memory.dmp	upx
behavioral1/memory/908-193-0x0000000000400000-0x0000000000486000-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	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 908 wrote to memory of 2148	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	29
PID 908 wrote to memory of 2148	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	29
PID 908 wrote to memory of 2148	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	29
PID 908 wrote to memory of 2148	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	29
PID 908 wrote to memory of 1064	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	31
PID 908 wrote to memory of 1064	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	31
PID 908 wrote to memory of 1064	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	31
PID 908 wrote to memory of 1064	908	e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:908
- C:\Users\Admin\AppData\Local\Temp\e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.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\e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\e50766c294f43e3d17f597db6d6ea0e0_JaffaCakes118.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1064

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\B30A.B76

Filesize
1KB

MD5
f4e2e99b3951b5d7f127b426467b358a

SHA1
fb8d21734424f32eba9a83d519e427d92f00abe5

SHA256
1170acd9fd02eafc3b0b3018d3526c2a520ba5629f437dcffa7cfec1f5b72ea2

SHA512
7e3b64599c40a5218ae3f0e5168eb70ca0bfcbfb7cacf8f50be703b9b9f926b19ec2537773d5b4fed77dcfe9fb0b468230ef75eea550a67485659362c1c3a364

Download Submit
C:\Users\Admin\AppData\Roaming\B30A.B76

Filesize
597B

MD5
a7ccf5c3865f7a7083cca6069e889f0e

SHA1
bb1903c6b9ad5dfbe4f4ac95ec438e6957ff2856

SHA256
c44fa754dfd02ef19405cc93e4e902fe1ae66e8b5b803a953bec989bae51775a

SHA512
7c7ad5525dd676d558cec10f38caed91e2bf6f449b3491845776f7b0d21bfe34533b7866ca61bd2a2efb917c85236a3de0cbf75cb93a14c8367f438ef492f68f

Download Submit
C:\Users\Admin\AppData\Roaming\B30A.B76

Filesize
897B

MD5
a23a46e25a7c368099a8eb53002ee908

SHA1
cd7bda56d5268942271611613f02529062a2b268

SHA256
117fe2e908d142c19935bd5ea24821d7a0d6ba1fd47051f84aa2074bf90b26b9

SHA512
de3585ed7846363a391163aa36bbef7f133111d9e1d802572e0498501ddfd233ffafde6d80412b433ce832b23e9f098b538ee3136f81de90626ab35cd84ccb8b

Download Submit
C:\Users\Admin\AppData\Roaming\B30A.B76

Filesize
1KB

MD5
1b0b0948637e32cb115257fe5be94e64

SHA1
41f839a636f8610ed18193e0a72e929e02b579a9

SHA256
a18bcea974d7513ae86f63df2dbb6f0a4cc6c561bc3daa2b4cea4d8024ee9d3f

SHA512
f08ba6bfbff75a6530b92d33712f86ac044304cef904c1e70954c8a925ec1980d04775d29265356cda81386535432f96c977acedfaa124741aecb7d872c44bb5

Download Submit
memory/908-79-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/908-2-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/908-193-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/908-158-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/908-18-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/908-1-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/1064-78-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/1064-76-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2148-6-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2148-7-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download
memory/2148-8-0x0000000000400000-0x0000000000486000-memory.dmp

Filesize
536KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads