guloader | 87cf6fac93e47d3f279dd1ee79a9d573228203bcd1078d0372452f0f3ea40709

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
01/05/2024, 01:42

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General

Target
a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4.exe
Size 380KB
Sample240501-b44lnafa66
SHA256 a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4
MD5 c1e9cae3895e47557c49da02e857331d
SHA1 cd606c216cdf514fd64b714037a75250007d90b7
SHA512 f4ede6b4caf0267888fe5cfaacfd808a4ef15c5b87f186211c57a75d77b3d4915e2851662e0528370deec6a4f974dce95ce1bd6df1a62c6675ce0d1bf717a486
SSDEEP 6144:HT4DtVpZI3UNm5XuEneTjst4l4hjVKLWWC4OZol37D3XmkL+VHjFz3+vaEfT:HTgUUEeTmzJKaYOGlXnoDdqlT
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader downloader persistence

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3411335054-1982420046-2118495756-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Startup key = "%Mesoderms% -windowstyle minimized $Priorized82=(Get-ItemProperty -Path 'HKCU:\\runos\\').Exsolved;%Mesoderms% ($Priorized82)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
1504	wab.exe
1504	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2884	powershell.exe
1504	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2884 set thread context of 1504	2884	powershell.exe	99

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

System Information Discovery
T1082

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2968	reg.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe
2884	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2884	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2884	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1504	wab.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2808 wrote to memory of 2884	2808	a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4.exe	83
PID 2808 wrote to memory of 2884	2808	a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4.exe	83
PID 2808 wrote to memory of 2884	2808	a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4.exe	83
PID 2884 wrote to memory of 3240	2884	powershell.exe	88
PID 2884 wrote to memory of 3240	2884	powershell.exe	88
PID 2884 wrote to memory of 3240	2884	powershell.exe	88
PID 2884 wrote to memory of 1504	2884	powershell.exe	99
PID 2884 wrote to memory of 1504	2884	powershell.exe	99
PID 2884 wrote to memory of 1504	2884	powershell.exe	99
PID 2884 wrote to memory of 1504	2884	powershell.exe	99
PID 2884 wrote to memory of 1504	2884	powershell.exe	99
PID 1504 wrote to memory of 2432	1504	wab.exe	100
PID 1504 wrote to memory of 2432	1504	wab.exe	100
PID 1504 wrote to memory of 2432	1504	wab.exe	100
PID 2432 wrote to memory of 2968	2432	cmd.exe	102
PID 2432 wrote to memory of 2968	2432	cmd.exe	102
PID 2432 wrote to memory of 2968	2432	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4.exe
"C:\Users\Admin\AppData\Local\Temp\a833220123f1e042399406b33817c857fec4d4471f9332b02abc390e11dae2e4.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Pareiasaurus=Get-Content 'C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Pidginizing\Halvpunkt240\Forblack231\Otiatric\Ergs.Tha';$Zoneindelingerne=$Pareiasaurus.SubString(56195,3);.$Zoneindelingerne($Pareiasaurus)"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2884
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" "/c set /A 1^^0"
    3⤵
    PID:3240
- - C:\Program Files (x86)\windows mail\wab.exe
    "C:\Program Files (x86)\windows mail\wab.exe"
    3⤵
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1504
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Mesoderms% -windowstyle minimized $Priorized82=(Get-ItemProperty -Path 'HKCU:\runos\').Exsolved;%Mesoderms% ($Priorized82)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2432
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Mesoderms% -windowstyle minimized $Priorized82=(Get-ItemProperty -Path 'HKCU:\runos\').Exsolved;%Mesoderms% ($Priorized82)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2968

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_mmfbw2oc.h4w.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mmfbw2oc.h4w.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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Bilipurpurin.Sla

Path C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Bilipurpurin.Sla
Size 322KB
SHA256 88761c61c887cc09658beef749102a2b17cc1752a10087146899e2ac8cf340c5
MD5 a6b465587a24051a3267f7097e93b1cf
SHA1 74bfbb11eaf146ea85a7fe21371e4810c7539fa3
SHA512 321d1cc296e456df43e722a1551959ad4aa5be868f88ad7fe4d08c6b35d2cdedb813f7869be130c6b69cd31199c56adc2cc1a2052ee3720197e659c6a39a1be5
SSDEEP 6144:YqoQBxT+RCLkg7D67pij8Q/eKM+qB0VgOnPunKguf0Ui:XBwRTGj85d+qyVg+PunhQ6
MD5 SHA1 SHA512 SSDEEP

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Ergs.Tha

Path C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Pidginizing\Halvpunkt240\Forblack231\Otiatric\Ergs.Tha
Size 54KB
SHA256 056096bc668ccf068617f877b2d960d93fcc3f2bfcf6dc51e3e6ee1a5c83cdb8
MD5 1c0b0b1677e6a0e8e41383703430a228
SHA1 3226cc511cb4ee3c4d8fc85f8309e769b588c59f
SHA512 b8856417ec13d2be0b53d74ec4a3b22784b5fa6ae0b2fd5d3cb21863103d01526ab60de2432e0532fcb27c36bc39d69e8178b1a8cc08f05a95c6bf591b581902
SSDEEP 768:NVOb/moCyL71NiFKFbshVB/RKpgdNfg5o6hwWPbIQ4bGkr1iDoxSP8Wej0aQ0wJ+:NVGmoCyH1LbQB/R45Wa/9D+lIJPgj
MD5 SHA1 SHA512 SSDEEP

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memory/1504-51-0x0000000002130000-0x0000000004085000-memory.dmp

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memory/2884-28-0x0000000008740000-0x0000000008DBA000-memory.dmp

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memory/2884-32-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-9-0x0000000005E20000-0x0000000005E86000-memory.dmp

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memory/2884-8-0x0000000005D80000-0x0000000005DA2000-memory.dmp

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memory/2884-20-0x0000000006080000-0x00000000063D4000-memory.dmp

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memory/2884-21-0x0000000006550000-0x000000000656E000-memory.dmp

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memory/2884-22-0x0000000006590000-0x00000000065DC000-memory.dmp

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memory/2884-23-0x0000000006AE0000-0x0000000006B76000-memory.dmp

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memory/2884-24-0x0000000006AA0000-0x0000000006ABA000-memory.dmp

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memory/2884-25-0x0000000006B80000-0x0000000006BA2000-memory.dmp

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memory/2884-26-0x0000000007B10000-0x00000000080B4000-memory.dmp

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memory/2884-7-0x0000000005600000-0x0000000005C28000-memory.dmp

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memory/2884-4-0x0000000004F90000-0x0000000004FC6000-memory.dmp

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memory/2884-30-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-31-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-15-0x0000000005F00000-0x0000000005F66000-memory.dmp

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memory/2884-6-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-34-0x0000000007A80000-0x0000000007A84000-memory.dmp

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memory/2884-35-0x0000000008DC0000-0x000000000AD15000-memory.dmp

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memory/2884-36-0x0000000008DC0000-0x000000000AD15000-memory.dmp

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memory/2884-37-0x0000000073890000-0x0000000074040000-memory.dmp

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memory/2884-38-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-40-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-41-0x00000000772E1000-0x0000000077401000-memory.dmp

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memory/2884-42-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-43-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-50-0x0000000002AA0000-0x0000000002AB0000-memory.dmp

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memory/2884-5-0x0000000073890000-0x0000000074040000-memory.dmp

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memory/2884-52-0x0000000073890000-0x0000000074040000-memory.dmp

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memory/2884-53-0x0000000008DC0000-0x000000000AD15000-memory.dmp

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