Analysis
- max time kernel
62s - max time network
67s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system - submitted
03/04/2024, 04:37
Static task
static1
Behavioral task
behavioral1
Sample
RFQ-SulselBarruII2-COALCOMMLDOC.exe
Resource
win7-20240221-en
17 signatures
150 seconds
Behavioral task
behavioral2
Sample
RFQ-SulselBarruII2-COALCOMMLDOC.exe
Resource
win10v2004-20240226-en
17 signatures
150 seconds
Behavioral task
behavioral3
Sample
Graustark/resultalet/Unmeringued.ps1
Resource
win7-20240221-en
9 signatures
150 seconds
Behavioral task
behavioral4
Sample
Graustark/resultalet/Unmeringued.ps1
Resource
win10v2004-20240226-en
12 signatures
150 seconds
General
- Target RFQ-SulselBarruII2-COALCOMMLDOC.exe
- Size 647KB
- Sample240403-e8z1tagf43
- SHA256 c384d26e83f585fbadd73e6cea441d1479d68de5bb647f775b506e5eab7f3230
- MD5 90fda5c072fe00e8e737606add7f1276
- SHA1 68752dce786a29b815ec5454d4b4aa5f6bc73363
- SHA512 df854ac565c084d47bc20e738ee8f36cf040d33fc2b7cb7c8ab84a83b2d77308b522eccd81e23e576bb9f82bf1ea00a50f33435522d8d2070923de0a862a2512
- SSDEEP 12288:IgXRAvufNFTr7L6GJpk/0C+wEc80Qu8j4RmYxrqwDwmuu6TNxFu+b:jXRyUNJr7L5vBC5ummYxrPqu6hxFu+
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook wab.exe Key opened \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook wab.exe Key opened \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook wab.exe - Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 38 drive.google.com 39 drive.google.com - Drops file in System32 directory 1 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\skillfully.ins RFQ-SulselBarruII2-COALCOMMLDOC.exe - Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
pid Process 4928 wab.exe 4928 wab.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 2556 powershell.exe 4928 wab.exe - Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 2556 set thread context of 4928 2556 powershell.exe 100 - Drops file in Program Files directory 1 IoCs
description ioc Process File created C:\Program Files (x86)\Common Files\ukases.lnk RFQ-SulselBarruII2-COALCOMMLDOC.exe - Drops file in Windows directory 1 IoCs
description ioc Process File created C:\Windows\resources\tuskish\smilehuller.lnk RFQ-SulselBarruII2-COALCOMMLDOC.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 9 IoCs
pid Process 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe 2556 powershell.exe - Suspicious behavior: MapViewOfSection 2 IoCs
pid Process 2556 powershell.exe 2556 powershell.exe - Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2556 powershell.exe Token: SeDebugPrivilege 4928 wab.exe - Suspicious use of WriteProcessMemory 14 IoCs
description pid Process procid_target PID 4748 wrote to memory of 2556 4748 RFQ-SulselBarruII2-COALCOMMLDOC.exe 88 PID 4748 wrote to memory of 2556 4748 RFQ-SulselBarruII2-COALCOMMLDOC.exe 88 PID 4748 wrote to memory of 2556 4748 RFQ-SulselBarruII2-COALCOMMLDOC.exe 88 PID 2556 wrote to memory of 3096 2556 powershell.exe 97 PID 2556 wrote to memory of 3096 2556 powershell.exe 97 PID 2556 wrote to memory of 3096 2556 powershell.exe 97 PID 2556 wrote to memory of 4852 2556 powershell.exe 99 PID 2556 wrote to memory of 4852 2556 powershell.exe 99 PID 2556 wrote to memory of 4852 2556 powershell.exe 99 PID 2556 wrote to memory of 4928 2556 powershell.exe 100 PID 2556 wrote to memory of 4928 2556 powershell.exe 100 PID 2556 wrote to memory of 4928 2556 powershell.exe 100 PID 2556 wrote to memory of 4928 2556 powershell.exe 100 PID 2556 wrote to memory of 4928 2556 powershell.exe 100 - outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook wab.exe - outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-3045580317-3728985860-206385570-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook wab.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\RFQ-SulselBarruII2-COALCOMMLDOC.exe"C:\Users\Admin\AppData\Local\Temp\RFQ-SulselBarruII2-COALCOMMLDOC.exe"1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:4748 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" -windowstyle hidden "$Harish116=Get-Content 'C:\Users\Admin\AppData\Local\Ubarberet\Graustark\resultalet\Unmeringued.Brd';$Omkldningsrums=$Harish116.SubString(61425,3);.$Omkldningsrums($Harish116)"2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2556 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c "set /A 1^^0"3⤵PID:3096
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C:\Program Files (x86)\windows mail\wab.exe"C:\Program Files (x86)\windows mail\wab.exe"3⤵PID:4852
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C:\Program Files (x86)\windows mail\wab.exe"C:\Program Files (x86)\windows mail\wab.exe"3⤵
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:4928
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jwetlmqu.tk2.ps1
- Size 60B
- SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
- MD5 d17fe0a3f47be24a6453e9ef58c94641
- SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
- SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Ubarberet\Graustark\resultalet\Reluktansernes.Ove71
- Size 337KB
- SHA256 07eecf0b61af3a50e22d08856f08e23b6b7ed731bf1e8965525a3b9c39acff5b
- MD5 771717add10395b56c27056035a7f725
- SHA1 bfa26b09a632998866e235c13c9859b4d4984236
- SHA512 cb68c1e0553be1cceec312b487f794252b46393d767a079591dca246d2f7820bf55602613ecf621e315476f7c781b0d63db7deba1af4877b2a1446534b975d4d
- SSDEEP 6144:FAFgQ39889Ah6x5gR7+OlnOdxuqt7zR2cfrSG+GBvIzXn6VZ9fMF:G+Q3rCsx5UHa3R2gJIDy98
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Ubarberet\Graustark\resultalet\Unmeringued.Brd
- Size 60KB
- SHA256 8559f472b29a2d1de1124b1b2aa6d62558b1207a3910048d77b9bb07501e3733
- MD5 8418ca27cc3391358049989e80076a60
- SHA1 0ca1bae9dfabae917324af7337d1ed8c2b6001aa
- SHA512 b6ee3a45200b5f218520c38fbde6b6a30e4f2e847ea890ace3b37a38b14f2c26ee12f21c350052336c67ac725233f1e5b65b1d0b5a4343ef0fca50214b96c01f
- SSDEEP 1536:FNKL+KTusOLdVQxd5B+n51ZPsXb7VZcrq/qhgPqpba5Znn:FNsl9Ud2u1ZP87ViQSpyBn
- MD5 SHA1 SHA512 SSDEEP