cycbot | 0ca38f6b5f015bf3980fd66b036af012a4dddca2211797963145b366648ccc46

General

Target

JaffaCakes118_73f12233600a9e427a59847212835217.exe
Size

189KB
MD5

73f12233600a9e427a59847212835217
SHA1

3f2a258f7b8bd43042d8835398ecab12c5e1df48
SHA256

0ca38f6b5f015bf3980fd66b036af012a4dddca2211797963145b366648ccc46
SHA512

5bc63ecf507b7e8ce81f3a1d063f03e3f2c33cd4c0d3ce9cdfde963dd12c1ad1d4b83f1858b084c7d03e09f40cd7a759ee52b00a42b46422dc4c9c25c4563aee
SSDEEP

3072:mV3P2odkWNB7FBxrzGcDYRn7CrYQ1+M5lNRmuxX+3B88ENkkrQmLpJ:mVuYB7DxrzGcDYhHW+M5QBjK7QmLp

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/2440-8-0x0000000000400000-0x000000000048A000-memory.dmp	family_cycbot
behavioral1/memory/2008-14-0x0000000000400000-0x000000000048A000-memory.dmp	family_cycbot
behavioral1/memory/1116-77-0x0000000000400000-0x000000000048A000-memory.dmp	family_cycbot
behavioral1/memory/2008-79-0x0000000000400000-0x000000000048A000-memory.dmp	family_cycbot
behavioral1/memory/2008-176-0x0000000000400000-0x000000000048A000-memory.dmp	family_cycbot
behavioral1/memory/2008-217-0x0000000000400000-0x000000000048A000-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_73f12233600a9e427a59847212835217.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/2008-3-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/2008-1-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/2440-8-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/2008-14-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/1116-77-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/2008-79-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/2008-176-0x0000000000400000-0x000000000048A000-memory.dmp	upx
behavioral1/memory/2008-217-0x0000000000400000-0x000000000048A000-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_73f12233600a9e427a59847212835217.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_73f12233600a9e427a59847212835217.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_73f12233600a9e427a59847212835217.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 2440	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	29
PID 2008 wrote to memory of 2440	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	29
PID 2008 wrote to memory of 2440	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	29
PID 2008 wrote to memory of 2440	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	29
PID 2008 wrote to memory of 1116	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	31
PID 2008 wrote to memory of 1116	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	31
PID 2008 wrote to memory of 1116	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	31
PID 2008 wrote to memory of 1116	2008	JaffaCakes118_73f12233600a9e427a59847212835217.exe	31

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_73f12233600a9e427a59847212835217.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_73f12233600a9e427a59847212835217.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2008
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_73f12233600a9e427a59847212835217.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_73f12233600a9e427a59847212835217.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2440
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_73f12233600a9e427a59847212835217.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_73f12233600a9e427a59847212835217.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1116

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\4B5F.BF3

Filesize
1KB

MD5
a8e4fb776e830b6c129993c82f5c2e0b

SHA1
342f103cebf7c00f2001ed2adc8c768f6c8dd5e3

SHA256
b01fed95ce6711d2d25d82b9729173bba37ddc206037e033e9f832ef81cb1532

SHA512
adbd73378dcf02744c5a30a9f0f1e04311f3dd0c812baf7a6d4712b531d68f15633fd7dbd1ab5bc24501392ae532f57ac61ec95a3102fa3eab155d3585b38c1f

Download Submit
C:\Users\Admin\AppData\Roaming\4B5F.BF3

Filesize
600B

MD5
b5c57a3ca74bcab346883f0f7adfd78e

SHA1
381efd75da52d27aeb34d6a3191d4327f9f516f0

SHA256
1878b6d43a9489e96eeba3bd1cd88a030fc2900f1c3d211192af2fd2c08dc79d

SHA512
7629a2b7f7b80c766727febe4689c35a4cbffb555f3ef1cbcd006139b6c5bb2bd7c627944c7d73dc9ea94304a3c10ca2cbf3766c7aa83355d7c0fc8ade0e5776

Download Submit
C:\Users\Admin\AppData\Roaming\4B5F.BF3

Filesize
996B

MD5
14eca109eff42bbb396d0fecece7d2ed

SHA1
48a7af200f7f02bc0f7ac9998bf6e238a390446e

SHA256
f64633ccab191d9a4b53885cb3bd364ac2a9d8249c24df52214e9bf8f1ee7f06

SHA512
6b8c8adfe88efa2db630c6f17c07b906518a03e22f597526a21b4337ab47736e262db99dbc4a7db3c11bb394466af9d36eec30676ba3497a5996667bcff5438e

Download Submit
memory/1116-77-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/1116-76-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2008-79-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2008-14-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2008-3-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2008-1-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2008-176-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2008-217-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2440-6-0x0000000000270000-0x0000000000370000-memory.dmp

Filesize
1024KB

Download
memory/2440-8-0x0000000000400000-0x000000000048A000-memory.dmp

Filesize
552KB

Download
memory/2440-9-0x00000000002B9000-0x00000000002E2000-memory.dmp

Filesize
164KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads