cycbot | 0e9ef42e87a0cc6b83e73e6a466d89a3076dbc8c3366a229c2147eae5d74208c

General

Target

JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe
Size

169KB
MD5

39e98f35addb6820603e70ee1f1d0d15
SHA1

e240171dcf6600333b31e717ea85cc15bade5882
SHA256

0e9ef42e87a0cc6b83e73e6a466d89a3076dbc8c3366a229c2147eae5d74208c
SHA512

2b20260f2efdbaf1ac1ec03e25537223ffb9ef0e912c257637f254863d6eaf715b73b57e42eaf2a354db9facffaea57196b3d1ba2a2ac45c9bc73766145526d0
SSDEEP

3072:j+LEc7MnG6adF32co5vf/HzjkSOEdIe29VBKDzPMS8TMaS6VjC:2EcMnPaL3q53rjk8ee23BK0S83Si

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/2812-9-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2124-20-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2124-81-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/816-83-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2124-196-0x0000000000400000-0x000000000046A000-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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.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 7 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2124-1-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2812-7-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2812-9-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2124-20-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2124-81-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/816-83-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2124-196-0x0000000000400000-0x000000000046A000-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_39e98f35addb6820603e70ee1f1d0d15.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 2812	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	30
PID 2124 wrote to memory of 2812	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	30
PID 2124 wrote to memory of 2812	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	30
PID 2124 wrote to memory of 2812	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	30
PID 2124 wrote to memory of 816	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	32
PID 2124 wrote to memory of 816	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	32
PID 2124 wrote to memory of 816	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	32
PID 2124 wrote to memory of 816	2124	JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe	32

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2812
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39e98f35addb6820603e70ee1f1d0d15.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:816

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\FA1B.7AC

Filesize
597B

MD5
27b35666bb22346552d9173f7e1e0f19

SHA1
ced161df97cf60248d29496fcb3c7c91c00019ec

SHA256
7faa6ee88c48bfbf4e71eab2d7dd2dfa3d2d33e8072cfaec4340100a589a6b33

SHA512
10d6caa98b5c078a79577572d4f8aa6e52f1aec965e166dc0a55d297b15e19c742c780068907521840b5bf4aaa283e1ee2d9281d042bdced6a3cbe6ae12a0708

Download Submit
C:\Users\Admin\AppData\Roaming\FA1B.7AC

Filesize
1KB

MD5
547c4ae83ee3f73c7ef7feed1ba142f8

SHA1
68a5f74c26c74b0379ea45c050ea336bd6294e99

SHA256
2c669a58dd572f09cd46839dad4a67e857c7397fc45589f3ec0e30ab929822db

SHA512
b6b6526f2dbaee5e28e325b1a4975c0b9fcc6ea1272b9b4e711a9ccf509ecd4107176b6a5b4bde1b83acea87fc870d5be514216c9a9440e4ef8582e6d597c41e

Download Submit
C:\Users\Admin\AppData\Roaming\FA1B.7AC

Filesize
897B

MD5
82c638d546ebc640d6f95a598786fbeb

SHA1
e0df2407e28ee32c0c4c2f0b7ce6982883eeb857

SHA256
75961636514dd163ef155ea9d78db4a5bff004cecd293d6519af915ff44483b4

SHA512
57cf22d46f8052d0f29b48fde1ba9e46eaa46479a22f7758071285d8c102cf2efec44ab74dc0e973f1f863d95e993543ddc8e202ce97c9208043ef2a367476f4

Download Submit
C:\Users\Admin\AppData\Roaming\FA1B.7AC

Filesize
1KB

MD5
07e5c3433b9aac1c3ca8f27edd69c905

SHA1
f29093c379913b0d88b17f77bf6011c9ea3c13dc

SHA256
386f7d8566c8f6dbec45d709cd23d442da58d51e8dad7f09f8781d04ebf597b6

SHA512
f84351ee24fdb00fc32498aeb16bc1857c3f18e596f0299f6af0d87834c1fb9cefc5e063bba613957fd64f6cc903c997a5717a606039fb04dedcde614d080e3f

Download Submit
memory/816-83-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2124-1-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2124-20-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2124-81-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2124-196-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2812-6-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2812-7-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2812-9-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads