njrat | 4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91

General

Target

4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
Size

93KB
MD5

0d70bfb77e3ddf3af6d6717abc780e11
SHA1

580ba59be674815882dd5dd4038b1b409e63da46
SHA256

4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91
SHA512

5485236ae4bd1931e3b7f72cc0fa9ad0d4c9178712c438f14d2513d3bb4e261dcccb25982a6a97e8e6258f4e33597383b9c0f948aedc73a846434375a9d61d76
SSDEEP

1536:4ESHFJ957YwFiJzco0S1XR9aKR5/i+jGJPj7Q/LvSzMiUDQWI/Ax5ppgYF03zXaj:VkHxiNHAKR5/5jGBw2nux5ppgYeXavb

Score

10^/10

njrat evasion persistence trojan

Malware Config

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat

Executes dropped EXE 2 IoCs

pid	Process
1992	Server.exe
520	csrss.exe

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Modify Existing Service

T1031

pid	Process
1316	netsh.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

Loads dropped DLL 2 IoCs

pid	Process
1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
1992	Server.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-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\e101a39ab5de59589562aa0ff3295ba5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .."	csrss.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\e101a39ab5de59589562aa0ff3295ba5 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\csrss.exe\" .."	csrss.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	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.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 18 IoCs

pid	Process
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe
520	csrss.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
Token: 33	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
Token: SeIncBasePriorityPrivilege	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
Token: SeDebugPrivilege	520	csrss.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1696 wrote to memory of 1992	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe	27
PID 1696 wrote to memory of 1992	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe	27
PID 1696 wrote to memory of 1992	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe	27
PID 1696 wrote to memory of 1992	1696	4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe	27
PID 1992 wrote to memory of 520	1992	Server.exe	28
PID 1992 wrote to memory of 520	1992	Server.exe	28
PID 1992 wrote to memory of 520	1992	Server.exe	28
PID 1992 wrote to memory of 520	1992	Server.exe	28
PID 520 wrote to memory of 1316	520	csrss.exe	29
PID 520 wrote to memory of 1316	520	csrss.exe	29
PID 520 wrote to memory of 1316	520	csrss.exe	29
PID 520 wrote to memory of 1316	520	csrss.exe	29

C:\Users\Admin\AppData\Local\Temp\4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe
"C:\Users\Admin\AppData\Local\Temp\4e665e0a12c6b7a73a337387db8618cca6a3ed03a34878bb2e188eead91bda91.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1696
- C:\Users\Admin\AppData\Local\Temp\Server.exe
  "C:\Users\Admin\AppData\Local\Temp\Server.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:1992
- - C:\Users\Admin\AppData\Local\Temp\csrss.exe
    "C:\Users\Admin\AppData\Local\Temp\csrss.exe"
    3⤵
    - Executes dropped EXE
    - Drops startup file
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:520
  - - C:\Windows\SysWOW64\netsh.exe
      netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\csrss.exe" "csrss.exe" ENABLE
      4⤵
      Modifies Windows Firewall
      PID:1316

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\Server.exe

Filesize
28KB

MD5
cbd44cf5c94bdd7c5865c74fc58b5936

SHA1
15a4a4da51cafab3f42ecbc47602cb4d5ec9b1aa

SHA256
2600db0f647f84e3540b73e3ef5f8594064b71e837c226f0d71ba8f4d2cb1440

SHA512
cc601c04854c714faad619373c5a8cfc4c5c078fcd9f6aa625fe0d4b580bb0883ae9d37d03b0bfcabbebe5da288808a1013de8efa7045e78fcfc6b29b9cd7963

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

Filesize
28KB

MD5
cbd44cf5c94bdd7c5865c74fc58b5936

SHA1
15a4a4da51cafab3f42ecbc47602cb4d5ec9b1aa

SHA256
2600db0f647f84e3540b73e3ef5f8594064b71e837c226f0d71ba8f4d2cb1440

SHA512
cc601c04854c714faad619373c5a8cfc4c5c078fcd9f6aa625fe0d4b580bb0883ae9d37d03b0bfcabbebe5da288808a1013de8efa7045e78fcfc6b29b9cd7963

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

Filesize
28KB

MD5
cbd44cf5c94bdd7c5865c74fc58b5936

SHA1
15a4a4da51cafab3f42ecbc47602cb4d5ec9b1aa

SHA256
2600db0f647f84e3540b73e3ef5f8594064b71e837c226f0d71ba8f4d2cb1440

SHA512
cc601c04854c714faad619373c5a8cfc4c5c078fcd9f6aa625fe0d4b580bb0883ae9d37d03b0bfcabbebe5da288808a1013de8efa7045e78fcfc6b29b9cd7963

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

Filesize
28KB

MD5
cbd44cf5c94bdd7c5865c74fc58b5936

SHA1
15a4a4da51cafab3f42ecbc47602cb4d5ec9b1aa

SHA256
2600db0f647f84e3540b73e3ef5f8594064b71e837c226f0d71ba8f4d2cb1440

SHA512
cc601c04854c714faad619373c5a8cfc4c5c078fcd9f6aa625fe0d4b580bb0883ae9d37d03b0bfcabbebe5da288808a1013de8efa7045e78fcfc6b29b9cd7963

Download Submit
C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch

Filesize
712B

MD5
9b54ad3fe6241a2a08953fbea904a98d

SHA1
81d6b676cc3d69e5e0fd3ca4be4dac3bb0c397ad

SHA256
e104c2763d19e233014eb3e0cfa78a817f760b73d007f7866bae26ce91fbc1fa

SHA512
97d4c9445d81ba619f3d30567f30ed2f67df756ee9ff2e8ae15efdf3236d4cb9b803fe19be13b33501e5e368c3d5d893aa9460a250c39fe3c709433c0eeb5473

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

Filesize
28KB

MD5
cbd44cf5c94bdd7c5865c74fc58b5936

SHA1
15a4a4da51cafab3f42ecbc47602cb4d5ec9b1aa

SHA256
2600db0f647f84e3540b73e3ef5f8594064b71e837c226f0d71ba8f4d2cb1440

SHA512
cc601c04854c714faad619373c5a8cfc4c5c078fcd9f6aa625fe0d4b580bb0883ae9d37d03b0bfcabbebe5da288808a1013de8efa7045e78fcfc6b29b9cd7963

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

Filesize
28KB

MD5
cbd44cf5c94bdd7c5865c74fc58b5936

SHA1
15a4a4da51cafab3f42ecbc47602cb4d5ec9b1aa

SHA256
2600db0f647f84e3540b73e3ef5f8594064b71e837c226f0d71ba8f4d2cb1440

SHA512
cc601c04854c714faad619373c5a8cfc4c5c078fcd9f6aa625fe0d4b580bb0883ae9d37d03b0bfcabbebe5da288808a1013de8efa7045e78fcfc6b29b9cd7963

Download Submit
memory/520-68-0x0000000074E10000-0x00000000753BB000-memory.dmp

Filesize
5.7MB

Download
memory/520-72-0x0000000074E10000-0x00000000753BB000-memory.dmp

Filesize
5.7MB

Download
memory/1696-54-0x00000000766D1000-0x00000000766D3000-memory.dmp

Filesize
8KB

Download
memory/1696-67-0x0000000074E10000-0x00000000753BB000-memory.dmp

Filesize
5.7MB

Download
memory/1696-71-0x0000000074E10000-0x00000000753BB000-memory.dmp

Filesize
5.7MB

Download
memory/1992-66-0x0000000074E10000-0x00000000753BB000-memory.dmp

Filesize
5.7MB

Download

Analysis

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