cycbot | b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779b

General

Target

b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe
Size

176KB
MD5

8a408f25a8d9e871120ec94ff075b5d0
SHA1

fd8c496b3b4f4f92c700b7b745e247e4f32198c3
SHA256

b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779b
SHA512

d5c73102e5351f6ef3b69701406f728583ea796a0053ac906f3d3caf335a41f9bd083899479e280f0b89fcb8c0ce786d649a021d3a8a6b56bad500b0a6fe1e07
SSDEEP

3072:4g2abTB0aeaOVzzRVWcARmp5R8qXlm0NDijVJcevgip7R+60Y6KLj54l3Irml:f2yIPR4eFXxiIT8lvD6KLj5qq

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/836-12-0x0000000000400000-0x000000000046E000-memory.dmp	family_cycbot
behavioral1/memory/836-14-0x0000000000400000-0x000000000046E000-memory.dmp	family_cycbot
behavioral1/memory/2364-15-0x0000000000400000-0x000000000046E000-memory.dmp	family_cycbot
behavioral1/memory/2364-74-0x0000000000400000-0x000000000046E000-memory.dmp	family_cycbot
behavioral1/memory/1664-79-0x0000000000400000-0x000000000046E000-memory.dmp	family_cycbot
behavioral1/memory/2364-187-0x0000000000400000-0x000000000046E000-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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.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/2364-2-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/836-12-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/836-14-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/2364-15-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/2364-74-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/1664-79-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/1664-78-0x0000000000400000-0x000000000046E000-memory.dmp	upx
behavioral1/memory/2364-187-0x0000000000400000-0x000000000046E000-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	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2364 wrote to memory of 836	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	30
PID 2364 wrote to memory of 836	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	30
PID 2364 wrote to memory of 836	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	30
PID 2364 wrote to memory of 836	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	30
PID 2364 wrote to memory of 1664	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	33
PID 2364 wrote to memory of 1664	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	33
PID 2364 wrote to memory of 1664	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	33
PID 2364 wrote to memory of 1664	2364	b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe	33

C:\Users\Admin\AppData\Local\Temp\b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe
"C:\Users\Admin\AppData\Local\Temp\b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2364
- C:\Users\Admin\AppData\Local\Temp\b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe
  C:\Users\Admin\AppData\Local\Temp\b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:836
- C:\Users\Admin\AppData\Local\Temp\b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe
  C:\Users\Admin\AppData\Local\Temp\b524fa136b68fb4db0e146de32fca9939e626df92bac81bbe3e507cf1734779bN.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1664

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\318C.CD8

Filesize
1KB

MD5
5e009c3331125140b7afd652749bfa8d

SHA1
7d97750724df6329d42aca6dc2f04fcc9527d90a

SHA256
7b3ad6d7b3a9f4b86aa0c22d682bc2e677b1b125ac1645ade59509bc842c9452

SHA512
c373ac43d0890e0aebdcc2e8877f01d3345139d3ac6e1449cebcd0123f982334308f4f5eaa155ab33f27c2b9a67f5ea67c7748c4ebca4fe91e74502efde9a8e1

Download Submit
C:\Users\Admin\AppData\Roaming\318C.CD8

Filesize
600B

MD5
97c3c5bcc95a4ba50614685db0976d40

SHA1
ce9b96870638e44c7e906f8ca84a36c26259374e

SHA256
26917a34ed7076877e7aede85000306266718478692bccd5b047d8ee159dcd0b

SHA512
91d27d9f27fa2e984fc36784afbef7390fcede41cd741210cfc56ff868b749fa09134f0bf0f27200257ff76c2093efa4d807c3b79e4665d323cce199f337e25e

Download Submit
C:\Users\Admin\AppData\Roaming\318C.CD8

Filesize
996B

MD5
b3f0aa72ecc3e6bd7427bd4eb9dc640d

SHA1
d7e885ed279aaf401a44da37e89ca14a98c7086b

SHA256
d55ef7a527dcd1ec61326908a91e1285b1d6a81465b5db856a5b772a57c70df9

SHA512
56b369807c6d43a58267da4fad32992b12e82c6c70c1cd38b4fe57e423192401bf88c25c1f149cb1af4183262848e3f53861e53128bae67b0ea5d752497da7f1

Download Submit
memory/836-12-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/836-14-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-78-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-76-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/1664-79-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2364-74-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2364-1-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2364-15-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2364-2-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download
memory/2364-187-0x0000000000400000-0x000000000046E000-memory.dmp

Filesize
440KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads