14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e

General

Target

14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe
Size

200KB
MD5

14825d0b4628a8d8d7d3d863394a15c0
SHA1

18eecdcfc96961a41794bf684b87a5bddeda1083
SHA256

14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e
SHA512

35375d13ced1647b5610c04a7cde62f337f6cf552de0f98ff78f7b40bcfd2354e47e667c6d91b3911b5f81b94fcb8866a05a36f49f67bad2082e1ad73586b7d1
SSDEEP

3072:ML/rW9xMU6uQmdYqo+ruGiYDuyoPfaJdJXZRrWRxoRuQOdYqCKrgGieDoyoxj6FS:+WbLQmdlgGpeaXJLWvxQOdlyGDI6L

Score

8^/10

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
536	csrss.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
2884	netsh.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e101a39ab5de59589562aa0ff3295ba5.exe	csrss.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\e101a39ab5de59589562aa0ff3295ba5.exe	csrss.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\e101a39ab5de59589562aa0ff3295ba5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .."	csrss.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\chrome = "C:\\Users\\Admin\\AppData\\Roaming\\google \\chrome.exe"	14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\e101a39ab5de59589562aa0ff3295ba5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .."	csrss.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 23 IoCs

pid	Process
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe
536	csrss.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3368	14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe
Token: SeDebugPrivilege	536	csrss.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 536	3368	14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe	76
PID 3368 wrote to memory of 536	3368	14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe	76
PID 3368 wrote to memory of 536	3368	14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe	76
PID 536 wrote to memory of 2884	536	csrss.exe	78
PID 536 wrote to memory of 2884	536	csrss.exe	78
PID 536 wrote to memory of 2884	536	csrss.exe	78

C:\Users\Admin\AppData\Local\Temp\14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe
"C:\Users\Admin\AppData\Local\Temp\14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3368
- C:\Users\Admin\AppData\Local\Temp\csrss.exe
  "C:\Users\Admin\AppData\Local\Temp\csrss.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:536
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\csrss.exe" "csrss.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:2884

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
200KB

MD5
14825d0b4628a8d8d7d3d863394a15c0

SHA1
18eecdcfc96961a41794bf684b87a5bddeda1083

SHA256
14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e

SHA512
35375d13ced1647b5610c04a7cde62f337f6cf552de0f98ff78f7b40bcfd2354e47e667c6d91b3911b5f81b94fcb8866a05a36f49f67bad2082e1ad73586b7d1

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

Filesize
200KB

MD5
14825d0b4628a8d8d7d3d863394a15c0

SHA1
18eecdcfc96961a41794bf684b87a5bddeda1083

SHA256
14dff9b05db1a48a4a138a6d4c545a23d54f12a67a70afe2e58267cdb416d05e

SHA512
35375d13ced1647b5610c04a7cde62f337f6cf552de0f98ff78f7b40bcfd2354e47e667c6d91b3911b5f81b94fcb8866a05a36f49f67bad2082e1ad73586b7d1

Download Submit
memory/536-138-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download
memory/536-139-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download
memory/3368-132-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download
memory/3368-136-0x0000000075320000-0x00000000758D1000-memory.dmp

Filesize
5.7MB

Download

Analysis

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