guloader | 1789a36b829cd09dc4fd24323a0d1bb900494714b4cc7083af651630f2c42d2f

General

Target

Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe
Size

648KB
MD5

93a658e985408e0538044b8b91a2729c
SHA1

c1f250915cb43fc6a46d29dc28a1f09881fe0ded
SHA256

1789a36b829cd09dc4fd24323a0d1bb900494714b4cc7083af651630f2c42d2f
SHA512

5337c140a778e4ababf7dd82fcd280feb2a7e9e9db981c7fed1fff9c0ea8d562afe71992aa054e98ba9c715f0bea48d939f98b171110a7aaffcd372d23e2816e
SSDEEP

12288:zsB4GOFuvCfdDrklbm9QfwYUcTWQ5xQryR2:I4GOFCCFf4m9ESQWQDQ2Q

Score

10^/10

guloader collection downloader execution

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
1208	powershell.exe

Loads dropped DLL 4 IoCs

pid	Process
2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe
2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe
2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe
2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	wab.exe
Key opened	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook	wab.exe
Key opened	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	wab.exe

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

Web Service

T1102

flow	ioc
3	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
668	wab.exe
668	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1208	powershell.exe
668	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1208 set thread context of 668	1208	powershell.exe	31

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\anorakkerne.ini	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1208	powershell.exe
1208	powershell.exe
1208	powershell.exe
1208	powershell.exe
1208	powershell.exe
1208	powershell.exe
1208	powershell.exe
1208	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1208	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1208	powershell.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2924 wrote to memory of 1208	2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe	28
PID 2924 wrote to memory of 1208	2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe	28
PID 2924 wrote to memory of 1208	2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe	28
PID 2924 wrote to memory of 1208	2924	Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe	28
PID 1208 wrote to memory of 668	1208	powershell.exe	31
PID 1208 wrote to memory of 668	1208	powershell.exe	31
PID 1208 wrote to memory of 668	1208	powershell.exe	31
PID 1208 wrote to memory of 668	1208	powershell.exe	31
PID 1208 wrote to memory of 668	1208	powershell.exe	31
PID 1208 wrote to memory of 668	1208	powershell.exe	31

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook	wab.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook	wab.exe

C:\Users\Admin\AppData\Local\Temp\Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Quote Request (Tupy S.A.) 523AM - 924BR·pdf.exe"
1⤵
- Loads dropped DLL
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:2924
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Omvurderingens=Get-Content 'C:\Users\Admin\AppData\Roaming\Odontiasis\Goatishness\Hoodmold.pal';$Genuflexion=$Omvurderingens.SubString(2127,3);.$Genuflexion($Omvurderingens)"
  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:1208
- - C:\Program Files (x86)\windows mail\wab.exe
    "C:\Program Files (x86)\windows mail\wab.exe"
    3⤵
    - Accesses Microsoft Outlook profiles
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - outlook_office_path
    - outlook_win_path
    PID:668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Odontiasis\Goatishness\Hoodmold.pal

Filesize
69KB

MD5
f10a2e78305cc76f40bc76797a5aca0e

SHA1
d107e88d4968c40da18b58a6ac7112e39410189d

SHA256
ab066f63579ee3e93dce7659a29411242b96046c457995c77c129ead19dfc4f8

SHA512
922c1c3967fd723430211e0e6ef09bb485e4e6ec8e95233a9d7c71a8c41c8d8276dae064648990974c1e093f19eae495b6be1956ef2e7f349ecb68621d3c2f00

Download Submit
C:\Users\Admin\AppData\Roaming\Odontiasis\Goatishness\Overtidsbetalingers.Afl

Filesize
330KB

MD5
c086b00efbe9cc4e81f801d0804e1647

SHA1
91751d0d919de34ed03abcb1662b35c68b17682d

SHA256
dfc92f1fb223f6a81ec1e72026e7e95376ce5f572b9a154a1d24c9abb2204888

SHA512
65fc0721c3818bd523d6766f51fea3efbcdb5629ce337ca39a4894c2ef677179b39e1ba3b2355c93f6d7d072313d1a8665c3534e69c523f20ce10cd3c4f33879

Download Submit
C:\Users\Admin\Pictures\slukningen.lnk

Filesize
976B

MD5
e1fa4cf3e318528035aa36dea6fd96d5

SHA1
f569023b3d6b4d709239c31f79a3822e14416d0f

SHA256
b77b68ac1cbe2d54b6be29e87098dff74685b37a702b3c96b4ed10a20a2019b2

SHA512
570c62371601c5a9ed446077a72b4c518614e2b76f8a8384c283f49d750100d770bb08617c04143ad14d186912f5c9937563d322744983623d770e69a428d01e

Download Submit
\Users\Admin\AppData\Local\Temp\nsdFE1E.tmp\AdvSplash.dll

Filesize
6KB

MD5
6def2cf3daf850acdc1a3e7340a439c4

SHA1
95d0d26f60cd5af697502cd5e53a54913ab188fb

SHA256
3ec3cf21a99ab0533ec2c451df3b5542733f70b972089d5c321ad7ae3b87d175

SHA512
16b1cf4783284d4a1282c569f5c416c713b4b339efcd4d3948bdf7da2194c597bd732d07ba9fabafcab323ba8c8da68845d4435ab9d1916b1810087ee1f5c413

Download Submit
\Users\Admin\AppData\Local\Temp\nsdFE1E.tmp\BgImage.dll

Filesize
7KB

MD5
2bb17d45e5ad92053ce1e500408dd8a9

SHA1
f5d3a7ee6e28df532e9ce33976c92ff30a5665e4

SHA256
71ce676703dad028e4083e6b960b1ed89885877079d46d5021506eaa6d99db53

SHA512
efdcb476b9b9b5691fe6b9cd77ecbe48d50c6683da01fd51c6b428cc262528fb3dcd295abe28718321b2307b0e032fcb599588f1eb00a93fd9e6a1f7b322b41f

Download Submit
\Users\Admin\AppData\Local\Temp\nsdFE1E.tmp\UserInfo.dll

Filesize
4KB

MD5
8ef0e4eb7c89cdd2b552de746f5e2a53

SHA1
820f681e7cec409a02b194a487d1c8af1038acf0

SHA256
41293b9f6588e0fbdc8fcf2a9bd8e2b244cd5ff038fc13033378da337219c9dc

SHA512
a68533e8a19637d0d44219549b24baba0dc4824424842f125600fda3edcafc4bb6bb340d57a00815f262d82373b440d58d6e4e5b2ceb29bb3f6bc4cbde66c3c5

Download Submit
\Users\Admin\AppData\Local\Temp\nsdFE1E.tmp\nsExec.dll

Filesize
6KB

MD5
c129bc26a26be6f5816a03520bb37833

SHA1
18100042155f948301701744b131c516bf26ddb8

SHA256
d3694fa0503158194129d113fcc1c83177ff5a5f93d898ce0bcfe9ce12f06bf4

SHA512
dbe79859c41e00a6e951cee889e7f0de29a712792fb531662285a2d6e384884518c7d5d983894c185b3d31d81213d2477cf4576b0114d352b759fe07a1704e63

Download Submit
memory/668-215-0x0000000000E40000-0x00000000019E6000-memory.dmp

Filesize
11.6MB

Download
memory/1208-183-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-184-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-185-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-186-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-182-0x0000000073BB1000-0x0000000073BB2000-memory.dmp

Filesize
4KB

Download
memory/1208-189-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-191-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download
memory/1208-192-0x0000000006660000-0x0000000007206000-memory.dmp

Filesize
11.6MB

Download
memory/1208-193-0x0000000073BB0000-0x000000007415B000-memory.dmp

Filesize
5.7MB

Download

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