guloader | b555b98abe8eb8f9e9f240fdb22070df16680e8864a6d93549a8288f57bff5c7

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
24-04-2024 01:20

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General

Target

b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe
Size

1.1MB
MD5

a0e9d68e9a8541eb30d6a31cae4a942b
SHA1

3cae987132d7f45df56f77c1ff2a542cb64e64c0
SHA256

b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4
SHA512

eebfe98652f6b7dffb7e57bdd73c80c073f0f1879ee8a86c17054e1e1ecc3bf5dcec66b4619944659b9038ecfca19254fec0cb60c5264d905382acc8fb0ea03a
SSDEEP

24576:c0vvQvOM6sjFYk6IuhdTuvMJbmhQU/YydIE5Ltp:clvpN2zuvMxmhB/Ylyp

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

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Hakkers = "%Philocaly% -windowstyle minimized $Atomlres=(Get-ItemProperty -Path 'HKCU:\\Mayst\\').Fordjelsesbesvrets;%Philocaly% ($Atomlres)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

2088 wab.exe
2088 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

powershell.exewab.exe

pid process

1572 powershell.exe
2088 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 1572 set thread context of 2088 1572 powershell.exe wab.exe

pid	process
2088	wab.exe
2088	wab.exe

pid	process
1572	powershell.exe
2088	wab.exe

description	pid	process	target process
PID 1572 set thread context of 2088	1572	powershell.exe	wab.exe

Drops file in Program Files directory 1 IoCs

Processes:

b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\Levantine.ini	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe

Drops file in Windows directory 2 IoCs

Processes:

b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe

description	ioc	process
File opened for modification	C:\Windows\Fonts\tashlik.ini	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe
File opened for modification	C:\Windows\resources\0409\marmoreret.ini	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.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 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

1936 reg.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exe

pid process

1572 powershell.exe
1572 powershell.exe
1572 powershell.exe
1572 powershell.exe
1572 powershell.exe
1572 powershell.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

powershell.exe

pid process

1572 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 1572 powershell.exe

pid	process
1936	reg.exe

pid	process
1572	powershell.exe
1572	powershell.exe
1572	powershell.exe
1572	powershell.exe
1572	powershell.exe
1572	powershell.exe

pid	process
1572	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1572	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exepowershell.exewab.execmd.exe

description	pid	process	target process
PID 2292 wrote to memory of 1572	2292	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe	powershell.exe
PID 2292 wrote to memory of 1572	2292	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe	powershell.exe
PID 2292 wrote to memory of 1572	2292	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe	powershell.exe
PID 2292 wrote to memory of 1572	2292	b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe	powershell.exe
PID 1572 wrote to memory of 1364	1572	powershell.exe	cmd.exe
PID 1572 wrote to memory of 1364	1572	powershell.exe	cmd.exe
PID 1572 wrote to memory of 1364	1572	powershell.exe	cmd.exe
PID 1572 wrote to memory of 1364	1572	powershell.exe	cmd.exe
PID 1572 wrote to memory of 2088	1572	powershell.exe	wab.exe
PID 1572 wrote to memory of 2088	1572	powershell.exe	wab.exe
PID 1572 wrote to memory of 2088	1572	powershell.exe	wab.exe
PID 1572 wrote to memory of 2088	1572	powershell.exe	wab.exe
PID 1572 wrote to memory of 2088	1572	powershell.exe	wab.exe
PID 1572 wrote to memory of 2088	1572	powershell.exe	wab.exe
PID 2088 wrote to memory of 1216	2088	wab.exe	cmd.exe
PID 2088 wrote to memory of 1216	2088	wab.exe	cmd.exe
PID 2088 wrote to memory of 1216	2088	wab.exe	cmd.exe
PID 2088 wrote to memory of 1216	2088	wab.exe	cmd.exe
PID 1216 wrote to memory of 1936	1216	cmd.exe	reg.exe
PID 1216 wrote to memory of 1936	1216	cmd.exe	reg.exe
PID 1216 wrote to memory of 1936	1216	cmd.exe	reg.exe
PID 1216 wrote to memory of 1936	1216	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe
"C:\Users\Admin\AppData\Local\Temp\b9d1e862b5f864aab90e418632cf973132a4b4cbe4044b1fb997d9dfbd7ad0f4.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2292

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" -windowstyle hidden "$Bissede=Get-Content 'C:\Users\Admin\AppData\Local\nervier\Estampede\sipunculacean\Michelines.All';$Flumes35=$Bissede.SubString(58005,3);.$Flumes35($Bissede)"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1572

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c "set /A 1^^0"
3⤵
PID:1364

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:2088

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Hakkers" /t REG_EXPAND_SZ /d "%Philocaly% -windowstyle minimized $Atomlres=(Get-ItemProperty -Path 'HKCU:\Mayst\').Fordjelsesbesvrets;%Philocaly% ($Atomlres)"
4⤵
- Suspicious use of WriteProcessMemory
PID:1216

C:\Windows\SysWOW64\reg.exe
REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Hakkers" /t REG_EXPAND_SZ /d "%Philocaly% -windowstyle minimized $Atomlres=(Get-ItemProperty -Path 'HKCU:\Mayst\').Fordjelsesbesvrets;%Philocaly% ($Atomlres)"
5⤵
- Adds Run key to start application
- Modifies registry key
PID:1936

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize
344B

MD5
03034a68e3b1b0a8a23b448ee4f2a139

SHA1
7090f7fb26f1061bc770348500a50922fee507f0

SHA256
80c7c3141fdd1c75d0ba0fa86e0779f50aebd797c85a867e3795b92064204d8f

SHA512
d5b7b386d30ee7d7cc0c36acffd6ece8751b7434fa33504cab33b1e48a8183074d42bd33989e8f972e670bdf7670ac21d74b7068c59305665615ab339f337edd

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab6135.tmp
Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar638D.tmp
Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
C:\Users\Admin\AppData\Local\nervier\Estampede\sipunculacean\Indskrnkningens.Meg
Filesize
301KB

MD5
50196fec4abccdb71d5f26eccdffb22b

SHA1
594f16df70de47019f285b72d39130885837a238

SHA256
592aa331c37790bb4627428385c85f843d839f2ebda2f621da438afb4edfe13d

SHA512
6a547e0c03fc7748b9637fa9c90784e30c4433d09b0488882d6b6792b41188a9ae2efa39f649da596d37d1079715842df315cae8fcdaf1482a5d804737d2192c

Download Submit
C:\Users\Admin\AppData\Local\nervier\Estampede\sipunculacean\Michelines.All
Filesize
56KB

MD5
82340892cba1f6e4faaa080bb634cf9c

SHA1
56b029cbcada747897e9beff7c8f1013b8c9b6ce

SHA256
a03bb54517df231824d324ad20b79094efef9af20eff855e30a6f459bcc43912

SHA512
dfea5297d9aef9004af38f8604e74313f99d477199e797dbeec5367ec3e6c0000a4c62eeab54425deee14de5b1adb224f09956a10619cf03b821b2b91b84f5c7

Download Submit
memory/1572-18-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/1572-19-0x00000000025D0000-0x0000000002610000-memory.dmp

Filesize
256KB

Download
memory/1572-30-0x00000000025D0000-0x0000000002610000-memory.dmp

Filesize
256KB

Download
memory/1572-25-0x0000000006570000-0x00000000092C6000-memory.dmp

Filesize
45.3MB

Download
memory/1572-26-0x0000000077440000-0x00000000775E9000-memory.dmp

Filesize
1.7MB

Download
memory/1572-27-0x0000000077630000-0x0000000077706000-memory.dmp

Filesize
856KB

Download
memory/1572-119-0x0000000006570000-0x00000000092C6000-memory.dmp

Filesize
45.3MB

Download
memory/1572-29-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/1572-24-0x0000000006570000-0x00000000092C6000-memory.dmp

Filesize
45.3MB

Download
memory/1572-17-0x00000000025D0000-0x0000000002610000-memory.dmp

Filesize
256KB

Download
memory/1572-21-0x00000000025D0000-0x0000000002610000-memory.dmp

Filesize
256KB

Download
memory/1572-23-0x00000000055A0000-0x00000000055A4000-memory.dmp

Filesize
16KB

Download
memory/1572-16-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2088-32-0x0000000077630000-0x0000000077706000-memory.dmp

Filesize
856KB

Download
memory/2088-33-0x0000000077666000-0x0000000077667000-memory.dmp

Filesize
4KB

Download
memory/2088-120-0x0000000077630000-0x0000000077706000-memory.dmp

Filesize
856KB

Download
memory/2088-117-0x0000000001DA0000-0x0000000004AF6000-memory.dmp

Filesize
45.3MB

Download
memory/2088-28-0x0000000001DA0000-0x0000000004AF6000-memory.dmp

Filesize
45.3MB

Download
memory/2088-31-0x0000000077440000-0x00000000775E9000-memory.dmp

Filesize
1.7MB

Download