cycbot | 66a2444b0af09d949fe609746d6ae8a064faea15d0f5c06383b6aa27731f8783

General

Target

JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
Size

182KB
MD5

a2a4457cabf47bdd7b0da0bbc351b0ec
SHA1

341eadfbb0114372700fe0d19830ff476c0fa67c
SHA256

66a2444b0af09d949fe609746d6ae8a064faea15d0f5c06383b6aa27731f8783
SHA512

f8dc1fd90fd4ee1585c4f21e8d5abe1cee75b7ff22d8b245ee0ecb48806862cf52ac7a745ec2bfb8ca055fe11cda1554cdc7679cb5d47af5654eb5960645feb6
SSDEEP

3072:WDpoB9Zj/CeB7CsVyttsw89wHFTU9kseI8HCSVgcA8UTPwgmtEhT57lIv0G1PIT:WiB9Zj/P3Vyttsm49ksetdETPEtEzRIU

Score

10^/10

cycbot backdoor discovery persistence rat 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
behavioral2/memory/3104-14-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral2/memory/4036-15-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral2/memory/4036-81-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral2/memory/3200-86-0x0000000000400000-0x0000000000490000-memory.dmp	family_cycbot
behavioral2/memory/4036-196-0x0000000000400000-0x0000000000490000-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-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe

UPX packed file 9 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4036-2-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/3104-12-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/3104-13-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/3104-14-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/4036-15-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/4036-81-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/3200-84-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/3200-86-0x0000000000400000-0x0000000000490000-memory.dmp	upx
behavioral2/memory/4036-196-0x0000000000400000-0x0000000000490000-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	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 3104	4036	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	83
PID 4036 wrote to memory of 3104	4036	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	83
PID 4036 wrote to memory of 3104	4036	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	83
PID 4036 wrote to memory of 3200	4036	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	90
PID 4036 wrote to memory of 3200	4036	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	90
PID 4036 wrote to memory of 3200	4036	JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe	90

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  PID:3104
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_a2a4457cabf47bdd7b0da0bbc351b0ec.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  PID:3200

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

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\F7D2.E3F

Filesize
1KB

MD5
f46a771d133f552bd1ede2a0e5ccb600

SHA1
6e519de034659e9498a5f41271cfc8d780aaad93

SHA256
10b0c2801a22f95ad1e9582bdfc4335fd7a94ec4d40d63c87e3fdba825aaad2c

SHA512
b51cccd07cd8a07a5f12e9a49d6a2f02ece5b83b73af2178694e37cd31cc1d428cb8a4afc63d2409cf1c29a9d146b0db5b1c7b8e30d2a2e30e75a87e3fcf9c00

Download Submit
C:\Users\Admin\AppData\Roaming\F7D2.E3F

Filesize
600B

MD5
93cdf993ceae39885ff90beb37c39c22

SHA1
4245f77059f673f3e89229e3c49ee819c246bd64

SHA256
d962428891df9f5bd74a04c1a827e18571fef7a6f86817145c0b94d4ac3bbf18

SHA512
2e375693c150ac61824cc41e98fb50d0ef5e1374ed6d35f05bbbc8b3d02b5fd418bf2f70097c31662efe0e5935afaf1a08b5be896d277b551cdbb865b9177589

Download Submit
C:\Users\Admin\AppData\Roaming\F7D2.E3F

Filesize
996B

MD5
e095a61731ae66c9467584f007d3c1a9

SHA1
2e1ec4aedd9b6f9156a472bd1a40a6d5e1a240b6

SHA256
2bf2317becb0b78756ec9084cede60c38414e0bc2da10fff651f6f1a9f17c737

SHA512
9fe7c2906f96028ca60fe1789255ebe100bfe7de20e3494174b7171ea049d8f23fd7f36c20a6f77aa872dad38e90754f3f70c980dcf5cbead05509cd0715a6ad

Download Submit
memory/3104-13-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/3104-14-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/3104-12-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/3200-83-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/3200-84-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/3200-86-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/4036-15-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/4036-1-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/4036-81-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/4036-2-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download
memory/4036-196-0x0000000000400000-0x0000000000490000-memory.dmp

Filesize
576KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads