cycbot | 5dae77a0cb286a0ed1e430bdc78c4bd986f3217a3d1c7413997a71b455071c56

General

Target

f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe
Size

192KB
MD5

f94050e6245132ac6fbffc77d5955f4d
SHA1

5ea83c94f4f617682fafc192c9e368f2f5e427ac
SHA256

5dae77a0cb286a0ed1e430bdc78c4bd986f3217a3d1c7413997a71b455071c56
SHA512

ed63c3e006836e19ec19edd55859107d87df65333e8d70acc9d255ebe153cc90a1a64ca2cc375891a9dd5d4fad217a77d1be1b7e543a492697470077a08ae9f9
SSDEEP

3072:rKtHuR794y5aCsHXeuuISPXS7hlIzF0jEA21tiNuvR17doa3pOR2vLadLduFwa7O:rKtHY79J5anHXPu9S0zFM9M0NuvRnL3m

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/2288-15-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2288-13-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2684-16-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2988-87-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2684-88-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral1/memory/2684-150-0x0000000000400000-0x0000000000490000-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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	f94050e6245132ac6fbffc77d5955f4d_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/2684-2-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2288-12-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2288-15-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2288-13-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2684-16-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2988-86-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2988-87-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2684-88-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral1/memory/2684-150-0x0000000000400000-0x0000000000490000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 1 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	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2684 wrote to memory of 2288	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	30
PID 2684 wrote to memory of 2288	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	30
PID 2684 wrote to memory of 2288	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	30
PID 2684 wrote to memory of 2288	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	30
PID 2684 wrote to memory of 2988	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	32
PID 2684 wrote to memory of 2988	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	32
PID 2684 wrote to memory of 2988	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	32
PID 2684 wrote to memory of 2988	2684	f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe	32

C:\Users\Admin\AppData\Local\Temp\f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2684
- C:\Users\Admin\AppData\Local\Temp\f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  PID:2288
- C:\Users\Admin\AppData\Local\Temp\f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe
  C:\Users\Admin\AppData\Local\Temp\f94050e6245132ac6fbffc77d5955f4d_JaffaCakes118.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  PID:2988

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\45D4.717

Filesize
1KB

MD5
b2817501d838810e65374244ca7da23e

SHA1
4f045020ac74dcd4e7bbc0045869cec30b7b4e5b

SHA256
9ce1b38dc7d11a4a57be3473e6f4fa583c842f2875683f0f144d954d8c774cc0

SHA512
de477be09e268c1f5678dcf394b7850a9386eacb5b56473d0a679c0e841db6a9a49a7ab876868f9f11089d271c13bdaea7c77b24eae90536285ede973095ea02

Download Submit
C:\Users\Admin\AppData\Roaming\45D4.717

Filesize
600B

MD5
7ac25f7e8acf450bc690730e353248cd

SHA1
b77afd4bcc72323afa85728d5502e6e2d5beb566

SHA256
d6c4d6dc3732e3a87b0dfec7ad1b3c4ad17b1714be371b9557794b9bf73e2cb6

SHA512
61658fa845ca6e4af56c83dd4d89a6d771a381ac491f544b410fd3a927153652ecf2142567c892addc38e59ea29e2fa7ec94153c23557b1781012e57b6e6a0f8

Download Submit
C:\Users\Admin\AppData\Roaming\45D4.717

Filesize
996B

MD5
c3cdf8269aa844b51cd0034534f67adb

SHA1
0651ad83d489439e3679759e6325ed8d45e8237b

SHA256
a10c7d51fd0f7b88f6c106ca0359bb828458c749ebaeced947ce7286ad4649d3

SHA512
28d43dccdddc8a81e9aa4792cf2e53d0fb8a8f153dae347d84e83032721942d80eb6848013c11f35bc6ca8a7a5412f9723e6b68d45844cf56fe49eca3b2c2a56

Download Submit
memory/2288-15-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2288-13-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2288-12-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2684-16-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2684-1-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2684-88-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2684-150-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2684-2-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2988-86-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/2988-87-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads