cycbot | 4c4a2cb454f5cfd8e6b85ab37b99b6ab045780edfe1d37a7331b896c4a4be6cd

General

Target

JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe
Size

176KB
MD5

128bb43a3670a9e839bd989ffe857c83
SHA1

00389237875cc2f44b8391eb717e0c99be53e557
SHA256

4c4a2cb454f5cfd8e6b85ab37b99b6ab045780edfe1d37a7331b896c4a4be6cd
SHA512

0cb7b6c2d8a85a37c53ef34518e18e582aaaa2a805ed5c6c1903b13c3eac7264c05fb29afa58723d9289caf1faf3b5c0d4e82b29bca4e7baf1254aade1f15bb5
SSDEEP

3072:HRSMzqd+KR++J9cXnOHZAfsj4JKkDz4Irfm8WgWSnA1swWjLrQtnCoTmpN1kSl:xSuqUKR++LcXOHOfAkLrnGSnnjYCKmLL

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/2756-6-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2436-14-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2436-77-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2928-79-0x0000000000400000-0x000000000046A000-memory.dmp	family_cycbot
behavioral1/memory/2436-199-0x0000000000400000-0x000000000046A000-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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.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/2436-2-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2756-5-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2756-6-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2436-14-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2436-77-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2928-79-0x0000000000400000-0x000000000046A000-memory.dmp	upx
behavioral1/memory/2436-199-0x0000000000400000-0x000000000046A000-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_128bb43a3670a9e839bd989ffe857c83.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 2756	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	31
PID 2436 wrote to memory of 2756	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	31
PID 2436 wrote to memory of 2756	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	31
PID 2436 wrote to memory of 2756	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	31
PID 2436 wrote to memory of 2928	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	33
PID 2436 wrote to memory of 2928	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	33
PID 2436 wrote to memory of 2928	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	33
PID 2436 wrote to memory of 2928	2436	JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe	33

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2436
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2756
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe
  C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_128bb43a3670a9e839bd989ffe857c83.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2928

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\A596.21B

Filesize
1KB

MD5
b24bd112f87d24ead2384cfa6c683c44

SHA1
4b77b50f16bbd34a46e2aa497c6bd78511b525af

SHA256
a8cc27043e5ad439d315ee0198007645baec17626b19f77d9f5e31a3d7f23859

SHA512
68453ddfdeae0f804450ebdf7423617124dd44ffa93fd66cce5be9dbf3c24443ff4b42a807a50486beef7a5eeddd2c28aab7e2f5616f001c046c2307adcb9b3f

Download Submit
C:\Users\Admin\AppData\Roaming\A596.21B

Filesize
600B

MD5
14a388c0d3d6d9024f60f3ce708789d2

SHA1
393719a91aaf334f942a3d3986cb18065930f19c

SHA256
3c05ac83eeab743f1a4604149213d06ed0dce3a60b86ebbcc80b42757aa5cbda

SHA512
1895899877297781be1438a4828e93ecc4051b7fdeec4611e215a1419ffd25bbd585ea76b81743032999e0603a4bb4ff70e1b83be06188eee83c75ed8f0c8129

Download Submit
C:\Users\Admin\AppData\Roaming\A596.21B

Filesize
1KB

MD5
c35e6fa474f084aeed30f09ed6c2a8bc

SHA1
2cb0e23d53321c44d38a00c15e3eb164b3855af4

SHA256
5e752c6bf446a439c13a9c997c60803693e54eac7a07559567c373bc1074e5f6

SHA512
e3498fcc32064ad12913c3b1e3a032d83b92df85431230dd88e56a892153664cfd31928c7837ae3c5cbacd5096a21680d9d0100a4aaf5e6bbf6e2826e300630b

Download Submit
C:\Users\Admin\AppData\Roaming\A596.21B

Filesize
996B

MD5
3bb5cdeb53dded42ecb3d05e0a1225be

SHA1
3b02fe16e1e789f82f63dabb2ff026d277f467c0

SHA256
20df5fe700948453ef91649099116834a750dd9e088c3223eb0d5087fdd8f46f

SHA512
72085061e95e836fca85c08ca6223bf4fcd13770c627b6704247bd9d6047736ff374a82dd45b601a73b1bef44a3dde67c5427f4bc6fc6667f1237c77e155e5a6

Download Submit
memory/2436-1-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2436-2-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2436-14-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2436-77-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2436-199-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2756-5-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2756-6-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download
memory/2928-79-0x0000000000400000-0x000000000046A000-memory.dmp

Filesize
424KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads