guloader | 21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229

General

Target

21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe
Size

632KB
MD5

051bd135f8be9f0dd2ef45a9918441f8
SHA1

d60f44452664f2f82cdd5c023795589611977446
SHA256

21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229
SHA512

bf029bde10505c6061a2a183e3d460a9c68e8564b71c41d89b5a0b8a2bbd5f9f8d8b9f20150623b9611af5f56256841eb924f04d473e4d8d8cea7609fb5eb5a0
SSDEEP

12288:L2KmM4kx4NDiGYaasscxBh9GvLj8y3u8DehE3S/0kBrs4CGLx4:L2KU5tauxSLj8y3RKhGbkBN9Lm

Score

10^/10

guloader downloader execution persistence

Malware Config

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2904	powershell.exe

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-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\Startup key = "%Chindi216% -windowstyle minimized $Chewink=(Get-ItemProperty -Path 'HKCU:\\Nubblier\\').Murings;%Chindi216% ($Chewink)"	reg.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\alliterates.ini	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
2852	wab.exe
2852	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2904	powershell.exe
2852	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2904 set thread context of 2852	2904	powershell.exe	33

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Voksvrks197.ini	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe
File opened for modification	C:\Program Files (x86)\Common Files\skurestribe.ini	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.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

pid	Process
2748	reg.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe
2904	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2904	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2904	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2904	2232	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe	28
PID 2232 wrote to memory of 2904	2232	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe	28
PID 2232 wrote to memory of 2904	2232	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe	28
PID 2232 wrote to memory of 2904	2232	21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe	28
PID 2904 wrote to memory of 2292	2904	powershell.exe	31
PID 2904 wrote to memory of 2292	2904	powershell.exe	31
PID 2904 wrote to memory of 2292	2904	powershell.exe	31
PID 2904 wrote to memory of 2292	2904	powershell.exe	31
PID 2904 wrote to memory of 2852	2904	powershell.exe	33
PID 2904 wrote to memory of 2852	2904	powershell.exe	33
PID 2904 wrote to memory of 2852	2904	powershell.exe	33
PID 2904 wrote to memory of 2852	2904	powershell.exe	33
PID 2904 wrote to memory of 2852	2904	powershell.exe	33
PID 2904 wrote to memory of 2852	2904	powershell.exe	33
PID 2852 wrote to memory of 740	2852	wab.exe	34
PID 2852 wrote to memory of 740	2852	wab.exe	34
PID 2852 wrote to memory of 740	2852	wab.exe	34
PID 2852 wrote to memory of 740	2852	wab.exe	34
PID 740 wrote to memory of 2748	740	cmd.exe	36
PID 740 wrote to memory of 2748	740	cmd.exe	36
PID 740 wrote to memory of 2748	740	cmd.exe	36
PID 740 wrote to memory of 2748	740	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe
"C:\Users\Admin\AppData\Local\Temp\21773cea42a57dff11a05f01ea94f48fc457871b110a410e4ccb416a4e346229.exe"
1⤵
- Drops file in System32 directory
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Forhrsleder=Get-Content 'C:\Users\Admin\AppData\Local\Temp\semiconventionally\mast\halvas\Pseudoaconitine210\Lavishment\Bifilar.For';$Nordamerikaner=$Forhrsleder.SubString(3576,3);.$Nordamerikaner($Forhrsleder)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2904
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" "/c set /A 1^^0"
    3⤵
    PID:2292
- - 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:2852
  - - 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 "%Chindi216% -windowstyle minimized $Chewink=(Get-ItemProperty -Path 'HKCU:\Nubblier\').Murings;%Chindi216% ($Chewink)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:740
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Chindi216% -windowstyle minimized $Chewink=(Get-ItemProperty -Path 'HKCU:\Nubblier\').Murings;%Chindi216% ($Chewink)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
9c8e1608dbf9264e48936f7665f48889

SHA1
4f3d4211e6c3592fc6da60ad4f4900e930f3ee25

SHA256
8a082fc4da9997130c4e431779892242f7beda38dda99c62f06f2c91bd46ec83

SHA512
ee6751b796094305bc36fda241ec90601faefe3961f2e7b96d3e0cbf3f2edb740927c2dca6a70c506b85f7bdfa426e13bad9317ce95b567a4cfce9ccb30645f9

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab8C69.tmp

Filesize
68KB

MD5
29f65ba8e88c063813cc50a4ea544e93

SHA1
05a7040d5c127e68c25d81cc51271ffb8bef3568

SHA256
1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

SHA512
e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar8CBA.tmp

Filesize
177KB

MD5
435a9ac180383f9fa094131b173a2f7b

SHA1
76944ea657a9db94f9a4bef38f88c46ed4166983

SHA256
67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

SHA512
1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

Download Submit
C:\Users\Admin\AppData\Local\Temp\semiconventionally\mast\halvas\Pseudoaconitine210\Lavishment\Bifilar.For

Filesize
49KB

MD5
dbd3fd0062c83fc1a96c9eb8f084ea63

SHA1
40f1ea618b83948dfd62c5c9169c2699dea936c8

SHA256
22964b08e64845d9c0c0f415b92e999db4a9415c241603ee21777e3c7237b331

SHA512
a9a138101e377f85028058fb33b8daa6b8e0c2f745237a2bcfab1ab4eed4e6569cfabe486e223c4c6e22395bcad800fb2539065f8d867a53dbdb3c6b71dccf0f

Download Submit
C:\Users\Admin\AppData\Local\Temp\semiconventionally\mast\halvas\Pseudoaconitine210\Lysbehandlinger.Tra

Filesize
331KB

MD5
7474345d44c52bde48e3f0aab7054ad2

SHA1
18316682d3e4fdcdd5806e08d6f6ddc468000bf7

SHA256
83214f0682a536093cd9730db0725dd3782a45253e5f38bfccaf43fbff3d98b5

SHA512
ffb21dcfac730bf14b9fd3eb5429a588f6d794d5d368e4ae7da4d8e880916fce9c045b62d0db35c663a34a7277e4df2cf9eed3e2e737682d4a3a62680adbc7bd

Download Submit
memory/2852-71-0x00000000004E0000-0x0000000001542000-memory.dmp

Filesize
16.4MB

Download
memory/2852-149-0x0000000001550000-0x0000000003517000-memory.dmp

Filesize
31.8MB

Download
memory/2904-63-0x00000000737D0000-0x0000000073D7B000-memory.dmp

Filesize
5.7MB

Download
memory/2904-69-0x0000000006660000-0x0000000008627000-memory.dmp

Filesize
31.8MB

Download
memory/2904-70-0x00000000737D0000-0x0000000073D7B000-memory.dmp

Filesize
5.7MB

Download
memory/2904-61-0x00000000737D1000-0x00000000737D2000-memory.dmp

Filesize
4KB

Download
memory/2904-64-0x00000000737D0000-0x0000000073D7B000-memory.dmp

Filesize
5.7MB

Download
memory/2904-65-0x00000000737D0000-0x0000000073D7B000-memory.dmp

Filesize
5.7MB

Download
memory/2904-62-0x00000000737D0000-0x0000000073D7B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads