57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999

General

Target

57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999.exe
Size

30KB
MD5

ab89f168dcff025b5c0220cb508060d1
SHA1

6db122e9bfdcd6efa1ae0ca5b82e4e7f9be567e0
SHA256

57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999
SHA512

6d3939fccc0ff41404416fbbc1972b1b2bdd51a60f11f810da57bec1d8781ccf714b9770b3a2b51139903119666355f980261e6dd60a8eb775a8a9719801d8c7
SSDEEP

384:wAx0nuJ3wZ9x7rHt6/iLVMVpUGAHT6Pq2XFg82G5Fk4tZS0QL5PyN:wfnuxIjz6VpUGAHT6PTuXAtLK

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1188	cmss.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
656	netsh.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e3865612041fb427745f1ab700d503ae.exe	cmss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e3865612041fb427745f1ab700d503ae.exe	cmss.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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\e3865612041fb427745f1ab700d503ae = "\"C:\\Users\\Admin\\AppData\\Roaming\\cmss.exe\" .."	cmss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e3865612041fb427745f1ab700d503ae = "\"C:\\Users\\Admin\\AppData\\Roaming\\cmss.exe\" .."	cmss.exe

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

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 21 IoCs

description	pid	Process
Token: SeDebugPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe
Token: 33	1188	cmss.exe
Token: SeIncBasePriorityPrivilege	1188	cmss.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1532 wrote to memory of 1188	1532	57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999.exe	28
PID 1532 wrote to memory of 1188	1532	57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999.exe	28
PID 1532 wrote to memory of 1188	1532	57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999.exe	28
PID 1188 wrote to memory of 656	1188	cmss.exe	29
PID 1188 wrote to memory of 656	1188	cmss.exe	29
PID 1188 wrote to memory of 656	1188	cmss.exe	29

C:\Users\Admin\AppData\Local\Temp\57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999.exe
"C:\Users\Admin\AppData\Local\Temp\57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1532
- C:\Users\Admin\AppData\Roaming\cmss.exe
  "C:\Users\Admin\AppData\Roaming\cmss.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Windows\system32\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\cmss.exe" "cmss.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:656

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\Roaming\cmss.exe

Filesize
30KB

MD5
ab89f168dcff025b5c0220cb508060d1

SHA1
6db122e9bfdcd6efa1ae0ca5b82e4e7f9be567e0

SHA256
57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999

SHA512
6d3939fccc0ff41404416fbbc1972b1b2bdd51a60f11f810da57bec1d8781ccf714b9770b3a2b51139903119666355f980261e6dd60a8eb775a8a9719801d8c7

Download Submit
C:\Users\Admin\AppData\Roaming\cmss.exe

Filesize
30KB

MD5
ab89f168dcff025b5c0220cb508060d1

SHA1
6db122e9bfdcd6efa1ae0ca5b82e4e7f9be567e0

SHA256
57f548a6fe2ba7f9920d754442796d2859d52bfa01ce7bba903f403ca5340999

SHA512
6d3939fccc0ff41404416fbbc1972b1b2bdd51a60f11f810da57bec1d8781ccf714b9770b3a2b51139903119666355f980261e6dd60a8eb775a8a9719801d8c7

Download Submit
memory/1188-60-0x000007FEF4490000-0x000007FEF4EB3000-memory.dmp

Filesize
10.1MB

Download
memory/1188-61-0x000007FEF2060000-0x000007FEF30F6000-memory.dmp

Filesize
16.6MB

Download
memory/1188-64-0x0000000001F16000-0x0000000001F35000-memory.dmp

Filesize
124KB

Download
memory/1188-65-0x0000000001F16000-0x0000000001F35000-memory.dmp

Filesize
124KB

Download
memory/1532-54-0x000007FEF35B0000-0x000007FEF3FD3000-memory.dmp

Filesize
10.1MB

Download
memory/1532-55-0x000007FEF2510000-0x000007FEF35A6000-memory.dmp

Filesize
16.6MB

Download
memory/1532-56-0x000007FEFB5D1000-0x000007FEFB5D3000-memory.dmp

Filesize
8KB

Download

Analysis

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