guloader | a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ce

General

Target

a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe
Size

720KB
MD5

71c52354f7a11731ac1acf20e22bf9f0
SHA1

2d53c7e64f9d894ad70907e89974776355c5f353
SHA256

a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ce
SHA512

bf7aeac82212d12f2d204164d46f13d0eb0ec63965051dd22532fceeca91e36eef6c01e5d6f9a9dbb5eb03d16040b93e42de25656ac14c9c4c38c66cf005ba8d
SSDEEP

12288:4MwaNZMK2sjLTeLXT764nwNtsgw3PgAeeVhGctc7K:4MwaNIYLTkZ2Mobe07K

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\diskussionsklubbens.ini	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe
2128	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2092 set thread context of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\mooktar\julekaktussers.ini	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31
PID 2092 wrote to memory of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31
PID 2092 wrote to memory of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31
PID 2092 wrote to memory of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31
PID 2092 wrote to memory of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31
PID 2092 wrote to memory of 2128	2092	a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe	31

C:\Users\Admin\AppData\Local\Temp\a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe
"C:\Users\Admin\AppData\Local\Temp\a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\AppData\Local\Temp\a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe
  "C:\Users\Admin\AppData\Local\Temp\a53383bbc7e9c1a2f461bb8c13a15d155103da0bd024f1babca3fddf4123f8ceN.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2128

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab1C78.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar1C9A.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
\Users\Admin\AppData\Local\Temp\nsdC562.tmp\System.dll

Filesize
12KB

MD5
564bb0373067e1785cba7e4c24aab4bf

SHA1
7c9416a01d821b10b2eef97b80899d24014d6fc1

SHA256
7a9ddee34562cd3703f1502b5c70e99cd5bba15de2b6845a3555033d7f6cb2a5

SHA512
22c61a323cb9293d7ec5c7e7e60674d0e2f7b29d55be25eb3c128ea2cd7440a1400cee17c43896b996278007c0d247f331a9b8964e3a40a0eb1404a9596c4472

Download Submit
memory/2092-13-0x0000000003470000-0x0000000005781000-memory.dmp

Filesize
35.1MB

Download
memory/2092-14-0x0000000077431000-0x0000000077532000-memory.dmp

Filesize
1.0MB

Download
memory/2092-16-0x0000000077430000-0x00000000775D9000-memory.dmp

Filesize
1.7MB

Download
memory/2092-15-0x0000000003470000-0x0000000005781000-memory.dmp

Filesize
35.1MB

Download
memory/2092-18-0x0000000003470000-0x0000000005781000-memory.dmp

Filesize
35.1MB

Download
memory/2128-17-0x0000000077430000-0x00000000775D9000-memory.dmp

Filesize
1.7MB

Download
memory/2128-19-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download

Analysis

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