d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65

General

Target

d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe
Size

156KB
MD5

84beceb25dc157b965c94dad4c057cf0
SHA1

fb31b194d575173a4fb5586b68a040237acacde1
SHA256

d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65
SHA512

77a143d663e27d31c8f8afd4be596b1a8d8bf69fcec20cc68eaa7936ae9212f2585ba458d9c42addf4f41166f43ab2738e5a481afe764073f706d101d4751dea
SSDEEP

3072:PP0Yoqcwx6cYKToU/uwXbVVOQraBIpPQMPozgEAQIIO:3WqlsUuwWQraBCDorAB

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1952	crssr.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
1480	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\69a00fcafbabcf72cffcc11690dc2860.exe	crssr.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\69a00fcafbabcf72cffcc11690dc2860.exe	crssr.exe

Loads dropped DLL 1 IoCs

pid	Process
876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2292972927-2705560509-2768824231-1000\Software\Microsoft\Windows\CurrentVersion\Run\69a00fcafbabcf72cffcc11690dc2860 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\crssr.exe\" .."	crssr.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\69a00fcafbabcf72cffcc11690dc2860 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\crssr.exe\" .."	crssr.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe
1952	crssr.exe
1952	crssr.exe
1952	crssr.exe
1952	crssr.exe
1952	crssr.exe
1952	crssr.exe
1952	crssr.exe
1952	crssr.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe
Token: SeDebugPrivilege	1952	crssr.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 876 wrote to memory of 1952	876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe	28
PID 876 wrote to memory of 1952	876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe	28
PID 876 wrote to memory of 1952	876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe	28
PID 876 wrote to memory of 1952	876	d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe	28
PID 1952 wrote to memory of 1480	1952	crssr.exe	29
PID 1952 wrote to memory of 1480	1952	crssr.exe	29
PID 1952 wrote to memory of 1480	1952	crssr.exe	29
PID 1952 wrote to memory of 1480	1952	crssr.exe	29

C:\Users\Admin\AppData\Local\Temp\d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe
"C:\Users\Admin\AppData\Local\Temp\d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:876
- C:\Users\Admin\AppData\Local\Temp\crssr.exe
  "C:\Users\Admin\AppData\Local\Temp\crssr.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1952
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\crssr.exe" "crssr.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:1480

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\crssr.exe

Filesize
156KB

MD5
84beceb25dc157b965c94dad4c057cf0

SHA1
fb31b194d575173a4fb5586b68a040237acacde1

SHA256
d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65

SHA512
77a143d663e27d31c8f8afd4be596b1a8d8bf69fcec20cc68eaa7936ae9212f2585ba458d9c42addf4f41166f43ab2738e5a481afe764073f706d101d4751dea

Download Submit
C:\Users\Admin\AppData\Local\Temp\crssr.exe

Filesize
156KB

MD5
84beceb25dc157b965c94dad4c057cf0

SHA1
fb31b194d575173a4fb5586b68a040237acacde1

SHA256
d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65

SHA512
77a143d663e27d31c8f8afd4be596b1a8d8bf69fcec20cc68eaa7936ae9212f2585ba458d9c42addf4f41166f43ab2738e5a481afe764073f706d101d4751dea

Download Submit
\Users\Admin\AppData\Local\Temp\crssr.exe

Filesize
156KB

MD5
84beceb25dc157b965c94dad4c057cf0

SHA1
fb31b194d575173a4fb5586b68a040237acacde1

SHA256
d4d1de44a7abca4b8c8cb0696fcdf8cbb4b08f249378c450c5d23d214896db65

SHA512
77a143d663e27d31c8f8afd4be596b1a8d8bf69fcec20cc68eaa7936ae9212f2585ba458d9c42addf4f41166f43ab2738e5a481afe764073f706d101d4751dea

Download Submit
memory/876-54-0x0000000075B11000-0x0000000075B13000-memory.dmp

Filesize
8KB

Download
memory/876-55-0x0000000074780000-0x0000000074D2B000-memory.dmp

Filesize
5.7MB

Download
memory/876-64-0x0000000074780000-0x0000000074D2B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-62-0x0000000074780000-0x0000000074D2B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-65-0x00000000002E5000-0x00000000002F6000-memory.dmp

Filesize
68KB

Download
memory/1952-66-0x0000000074780000-0x0000000074D2B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-67-0x00000000002E5000-0x00000000002F6000-memory.dmp

Filesize
68KB

Download

Analysis

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