guloader | cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac

General

Target

cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
Size

1.1MB
MD5

2ac9cd56e3877efa00a0353cde71186f
SHA1

d0460a2b1fe30c342216048c4390af045b120146
SHA256

cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac
SHA512

e78d405d9b92319d396d488e4c104021a224789fabf09a278d252e1aa407cae1ce4d3562f1e6a18bc3151e16049a1a6d3687b6a4578fc4c946349d5292eb9e2d
SSDEEP

24576:oS5HuMJiUsl/f4g0lnQFpy54j3BjqgMQUWhypBj:B5o/falnQ+54j3ZftUNBj

Score

10^/10

guloader downloader persistence

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.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-1-5-21-3627615824-4061627003-3019543961-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Gaucheries = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Kerykeion126\\Tranlampe231.exe"	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

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\threshes.uds	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
File opened for modification	C:\Windows\SysWOW64\lohoch.gim	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
2420	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1044 set thread context of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\enchasing.Pet	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
File opened for modification	C:\Windows\Fonts\Forters67\Elektrotekniker.wra	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
File opened for modification	C:\Windows\Tnkepauses.tro	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

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

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1044 wrote to memory of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28
PID 1044 wrote to memory of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28
PID 1044 wrote to memory of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28
PID 1044 wrote to memory of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28
PID 1044 wrote to memory of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28
PID 1044 wrote to memory of 2420	1044	cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe	28

C:\Users\Admin\AppData\Local\Temp\cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe
"C:\Users\Admin\AppData\Local\Temp\cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1044
- C:\Program Files (x86)\windows mail\wab.exe
  "C:\Users\Admin\AppData\Local\Temp\cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
65KB

MD5
ac05d27423a85adc1622c714f2cb6184

SHA1
b0fe2b1abddb97837ea0195be70ab2ff14d43198

SHA256
c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

SHA512
6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarE3FE.tmp

Filesize
171KB

MD5
9c0c641c06238516f27941aa1166d427

SHA1
64cd549fb8cf014fcd9312aa7a5b023847b6c977

SHA256
4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

SHA512
936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

Download Submit
\Users\Admin\AppData\Local\Temp\nsyDD7.tmp\System.dll

Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/1044-25-0x0000000004070000-0x00000000068BD000-memory.dmp

Filesize
40.3MB

Download
memory/1044-23-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/1044-22-0x0000000077980000-0x0000000077A56000-memory.dmp

Filesize
856KB

Download
memory/1044-21-0x0000000077790000-0x0000000077939000-memory.dmp

Filesize
1.7MB

Download
memory/1044-20-0x0000000004070000-0x00000000068BD000-memory.dmp

Filesize
40.3MB

Download
memory/2420-24-0x0000000001E00000-0x000000000464D000-memory.dmp

Filesize
40.3MB

Download
memory/2420-26-0x0000000077790000-0x0000000077939000-memory.dmp

Filesize
1.7MB

Download
memory/2420-27-0x00000000779B6000-0x00000000779B7000-memory.dmp

Filesize
4KB

Download
memory/2420-28-0x0000000077980000-0x0000000077A56000-memory.dmp

Filesize
856KB

Download
memory/2420-30-0x0000000000D90000-0x0000000001DF2000-memory.dmp

Filesize
16.4MB

Download
memory/2420-31-0x0000000001E00000-0x000000000464D000-memory.dmp

Filesize
40.3MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads