cycbot | 4d36669185fe8a141cb170380c0525de7a590e75da38cebe5061793a29262b1a

General

Target

JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe
Size

184KB
MD5

a5c9ce85f90e8d5196f2cac7e85bf302
SHA1

335636fbe2143640ea85e8be11ff8f10fe6979d9
SHA256

4d36669185fe8a141cb170380c0525de7a590e75da38cebe5061793a29262b1a
SHA512

26f31d0b3ee1ddf6e0c04e6c030419142cd7a687f2d9f36cf13c35c217225feb11b83af694606de44a310a731f42136176f9e62e8adf9eddc21a0849713fb927
SSDEEP

3072:Eb8GZwHueA6NP2r1OJsrDLsvsWqmno1PHA1hxZfqyB6PID/p5UkgvmODt:EbTK+6A1g8XsDo1PHAVZfKQp53gvv

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/2852-13-0x0000000000400000-0x000000000048E000-memory.dmp	family_cycbot
behavioral1/memory/2852-12-0x0000000000400000-0x000000000048E000-memory.dmp	family_cycbot
behavioral1/memory/1356-14-0x0000000000400000-0x000000000048E000-memory.dmp	family_cycbot
behavioral1/memory/1688-90-0x0000000000400000-0x000000000048E000-memory.dmp	family_cycbot
behavioral1/memory/1356-92-0x0000000000400000-0x000000000048E000-memory.dmp	family_cycbot
behavioral1/memory/1356-200-0x0000000000400000-0x000000000048E000-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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.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/1356-1-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/1356-3-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/2852-13-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/2852-12-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/1356-14-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/1688-90-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/1356-92-0x0000000000400000-0x000000000048E000-memory.dmp	upx
behavioral1/memory/1356-200-0x0000000000400000-0x000000000048E000-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_a5c9ce85f90e8d5196f2cac7e85bf302.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1356 wrote to memory of 2852	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	29
PID 1356 wrote to memory of 2852	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	29
PID 1356 wrote to memory of 2852	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	29
PID 1356 wrote to memory of 2852	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	29
PID 1356 wrote to memory of 1688	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	31
PID 1356 wrote to memory of 1688	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	31
PID 1356 wrote to memory of 1688	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	31
PID 1356 wrote to memory of 1688	1356	JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1356
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2852
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a5c9ce85f90e8d5196f2cac7e85bf302.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1688

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\3EF1.1EE

Filesize
996B

MD5
7ef92b381b880a50e45e509cfb1b4883

SHA1
cc92c94932bc6bdf56b4dd7a00e4acbf83d700db

SHA256
6850b3a56c8fe36d898b12bbf4da0d6fa65525de4ef4f8abd7b874ef8043aa87

SHA512
6228a46da4a764d28570f23284dc016d0a6f1c5deee3d60e6e84a6c8d3716a764a4815848f143d9c0739e842dce6a868aa951b2325ddcf6b3e0ebc0f13b3b7a4

Download Submit
C:\Users\Admin\AppData\Roaming\3EF1.1EE

Filesize
1KB

MD5
30daa784a77e87347b2c6128d6d75421

SHA1
54498760a6334098da2381af40350e99ba6346f5

SHA256
d045c3cf25e165110caf71ee805beaaf7445ec564155f8f8aececdedbc77080e

SHA512
91e9e56360bd5fe4a8f37645d67ca77489b01b47550d77e5bcfda6928e74484f7aa6a6fe73710e2120d0d7959bb4825d382d2bfd700259df81c94830a23a0940

Download Submit
C:\Users\Admin\AppData\Roaming\3EF1.1EE

Filesize
600B

MD5
a32c3c152a0b88fd50cb4590df4bf88e

SHA1
f7a6a5e50970166b5c37a41de1139bbf03a01a6f

SHA256
272314bac678993d3723648420986467ce39d4d055bfc88ede08e969c3959dfd

SHA512
5eb85a8f279a87b3ffef2c183014555f4416e5a0f370d077e1cfc9f2739e58d8146958802c89be692d0bb080fd67452ae6b19a6fc227d7984d0272bf04792ee6

Download Submit
C:\Users\Admin\AppData\Roaming\3EF1.1EE

Filesize
1KB

MD5
731b5e816caf29d120df6ec738297ae1

SHA1
d8c5655419b953f128cb18a7d8751a67cd9d288a

SHA256
4dbcb0985874cafe083559f2348240511d4174ad133e55a5f303af1d3dc120be

SHA512
20423bd40bc21124253708ff2369321e200a13b5a199a5fc96bc9f912828fe02882aed5ac1a3c670d807bc9ce3d39cc3a489eb41884f6033f95c9b876a66d2d8

Download Submit
memory/1356-3-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1356-200-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1356-14-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1356-1-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1356-92-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1688-90-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/1688-89-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/2852-12-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download
memory/2852-13-0x0000000000400000-0x000000000048E000-memory.dmp

Filesize
568KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads