cycbot | 4bfeff9bba0c096697641a0bef4e3dfd808b37cf48ec5954ddc9aeaea835e140

General

Target

VirusShare_0103567aa562f419b8f7f710a18454bf.exe
Size

182KB
MD5

0103567aa562f419b8f7f710a18454bf
SHA1

0e92b28d62700fedf89d9d809b41be33cedaed64
SHA256

4bfeff9bba0c096697641a0bef4e3dfd808b37cf48ec5954ddc9aeaea835e140
SHA512

8c2c6219b6ff2f756a0a4e2360cc1e5963000389f6b237a0c15121f46daeba1530d4af68f2ae1beaf466e2bf843734895f04bc65df510d2f80d22e115ebbb49a
SSDEEP

3072:mUhoj8I2cE/yB4wt1Kmq3h1QyYhR6UJ4XW8HZxTdDEzoKfdWqnZFhqN4Otgm34:mUqgI2cE/yf3gwyYhR6UJ4m8HRPEdWqY

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/2620-10-0x0000000000400000-0x000000000048C000-memory.dmp	family_cycbot
behavioral2/memory/4516-15-0x0000000000400000-0x000000000048C000-memory.dmp	family_cycbot
behavioral2/memory/4516-76-0x0000000000400000-0x000000000048C000-memory.dmp	family_cycbot
behavioral2/memory/4624-81-0x0000000000400000-0x000000000048C000-memory.dmp	family_cycbot
behavioral2/memory/4516-191-0x0000000000400000-0x000000000048C000-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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,C:\\Users\\Admin\\AppData\\Roaming\\dwm.exe"	VirusShare_0103567aa562f419b8f7f710a18454bf.exe

UPX packed file 8 IoCs

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

upx

resource	yara_rule
behavioral2/memory/4516-2-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/2620-8-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/2620-10-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/4516-15-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/4516-76-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/4624-79-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/4624-81-0x0000000000400000-0x000000000048C000-memory.dmp	upx
behavioral2/memory/4516-191-0x0000000000400000-0x000000000048C000-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	VirusShare_0103567aa562f419b8f7f710a18454bf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VirusShare_0103567aa562f419b8f7f710a18454bf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	VirusShare_0103567aa562f419b8f7f710a18454bf.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4516 wrote to memory of 2620	4516	VirusShare_0103567aa562f419b8f7f710a18454bf.exe	83
PID 4516 wrote to memory of 2620	4516	VirusShare_0103567aa562f419b8f7f710a18454bf.exe	83
PID 4516 wrote to memory of 2620	4516	VirusShare_0103567aa562f419b8f7f710a18454bf.exe	83
PID 4516 wrote to memory of 4624	4516	VirusShare_0103567aa562f419b8f7f710a18454bf.exe	86
PID 4516 wrote to memory of 4624	4516	VirusShare_0103567aa562f419b8f7f710a18454bf.exe	86
PID 4516 wrote to memory of 4624	4516	VirusShare_0103567aa562f419b8f7f710a18454bf.exe	86

C:\Users\Admin\AppData\Local\Temp\VirusShare_0103567aa562f419b8f7f710a18454bf.exe
"C:\Users\Admin\AppData\Local\Temp\VirusShare_0103567aa562f419b8f7f710a18454bf.exe"
1⤵
- Modifies WinLogon for persistence
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4516
- C:\Users\Admin\AppData\Local\Temp\VirusShare_0103567aa562f419b8f7f710a18454bf.exe
  C:\Users\Admin\AppData\Local\Temp\VirusShare_0103567aa562f419b8f7f710a18454bf.exe startC:\Users\Admin\AppData\Roaming\Microsoft\conhost.exe%C:\Users\Admin\AppData\Roaming\Microsoft
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2620
- C:\Users\Admin\AppData\Local\Temp\VirusShare_0103567aa562f419b8f7f710a18454bf.exe
  C:\Users\Admin\AppData\Local\Temp\VirusShare_0103567aa562f419b8f7f710a18454bf.exe startC:\Users\Admin\AppData\Local\Temp\csrss.exe%C:\Users\Admin\AppData\Local\Temp
  2⤵
  - System Location Discovery: System Language Discovery
  PID:4624

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\BF7A.214

Filesize
1KB

MD5
c3231cff504ec888a5550b517f4cdb37

SHA1
9f58625853901395e9e0182467d6773f465a01a9

SHA256
cbb942b8b4b29c5328a40e5b922149f3a1e370203adb4eb3d0d6df8f2704055f

SHA512
90731ae9c95b1da39c2f5efa2020f3ffcc5877aeeecd0d38909121f375a9fc200933b81dae970c52f17c2221b16740feaf8b38f2f440f70329705ae46502b361

Download Submit
C:\Users\Admin\AppData\Roaming\BF7A.214

Filesize
600B

MD5
d95bdda684f284126f26a228bd16af48

SHA1
133112f874b97559cefe27e4ca73b1ba5ca2d3c1

SHA256
f0d68dffc02141e25f3170c1f8ca563f07348331ee3979f598e11e7a2bdddcc6

SHA512
3ece1f204b037ce90c62223f5af53b72ee9efb0a54c0bec461b4e9bd09dcd71482783529892369ed2e3d4970bbb4f83211726579995c82feae6a17c6cf873d26

Download Submit
C:\Users\Admin\AppData\Roaming\BF7A.214

Filesize
996B

MD5
1abb950162267f389037447622b5ad2e

SHA1
526835d277ab861cc18b478344080cd973e3c498

SHA256
9a7ff7368dbd34fefe232eab531a019d9780faee523f54be4724c6fbd33d1424

SHA512
776b93232130d4aec653548b490c6abb33a94c5ddc78635dfb08b768bff2f58a5ed00725c96414f922f5109608d4953e6c67c60aef4f41470ca5f3b640e259f7

Download Submit
memory/2620-8-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/2620-10-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4516-76-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4516-1-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4516-15-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4516-2-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4516-191-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4624-78-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4624-79-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download
memory/4624-81-0x0000000000400000-0x000000000048C000-memory.dmp

Filesize
560KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads