guloader | acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac

General

Target

acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
Size

925KB
MD5

45ade5a7d2ba48cc791547736965f440
SHA1

37fb98d6b79231cdaf6b4b6f88f38e575a67742f
SHA256

acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac
SHA512

d89fec7cd5d4c0868daa57eaae1fb92b899ec2cf26ddefe0267da8f347b99aece88b8d7901af8dff6d815c3e69cff657573663cf8a07693fb64c1f3f6ad116e7
SSDEEP

24576:wD2EKyq5H7X3y6MBGYrNizPkY6/mMScs2:wD2EKyGH7ny6MBBizPo/mMScs2

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 6 IoCs

pid	Process
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
452	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
452	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3940 set thread context of 452	3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe	98

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4588	452	WerFault.exe	98

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	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
452	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
452	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3940 wrote to memory of 452	3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe	98
PID 3940 wrote to memory of 452	3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe	98
PID 3940 wrote to memory of 452	3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe	98
PID 3940 wrote to memory of 452	3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe	98
PID 3940 wrote to memory of 452	3940	acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe	98

C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
"C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3940
- C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe
  "C:\Users\Admin\AppData\Local\Temp\acdda22ea40a289e3a1ff725de7a933415bf6c143dc60cdb296fe17d36d894ac.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:452
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 452 -s 1232
    3⤵
    - Program crash
    PID:4588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 452 -ip 452
1⤵
PID:5024

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\nsp784E.tmp\LangDLL.dll

Filesize
5KB

MD5
61f69388ae89d61a3d838cbcf81b4f82

SHA1
e595c0236a373a6ac79c334dc183ee03ca8f8ecd

SHA256
d65875bb4bc121f81384d55fde90dd9eb9ad1878cd8a02bcb5c8a933c3987a61

SHA512
21d34738cc21c1ef6b0ef1ac53659cdab224bbc20ea983f9a952a2cb4b5785a07bb18c0acf22a0d12a94795e1fc6d314f442c923bb1a93b675edac8c6aacf469

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsp784E.tmp\System.dll

Filesize
11KB

MD5
4ca4fd3fbefa2f6e87e6e9ee87d1c0b3

SHA1
7cdbeb5ff2b14b86af04e075d0ca651183ea5df4

SHA256
d09a8b3ade4ba4b7292c0b3da1bcb4b6c6e2012e0ccfd5e029a54af73a9e1b57

SHA512
cf0f415a97fdc74568297fed4f1295d0d2aef487a308141144ef8d5f04c669ef4795c273e745b81065429adde113fcdedf4c22717a7aeef60fdcd8d4d46f97f8

Download Submit
memory/452-36-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/452-40-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/452-39-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/452-38-0x0000000001660000-0x0000000003E35000-memory.dmp

Filesize
39.8MB

Download
memory/452-37-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/452-33-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/452-35-0x0000000001660000-0x0000000003E35000-memory.dmp

Filesize
39.8MB

Download
memory/3940-30-0x0000000005240000-0x0000000007A15000-memory.dmp

Filesize
39.8MB

Download
memory/3940-34-0x0000000005240000-0x0000000007A15000-memory.dmp

Filesize
39.8MB

Download
memory/3940-32-0x0000000074924000-0x0000000074925000-memory.dmp

Filesize
4KB

Download
memory/3940-31-0x0000000077AC1000-0x0000000077BE1000-memory.dmp

Filesize
1.1MB

Download
memory/3940-29-0x0000000005240000-0x0000000007A15000-memory.dmp

Filesize
39.8MB

Download

Analysis

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