guloader | c6a10b1d71d2aae9601572d3dba867bb8e5fbd435b41f3fa111cb89acc86774b

General

Target

olieki.exe
Size

268KB
MD5

a63baaab947841c61e60e663c6209f80
SHA1

1f20c6525e42278f64303303468c13cf85ef5b4b
SHA256

c6a10b1d71d2aae9601572d3dba867bb8e5fbd435b41f3fa111cb89acc86774b
SHA512

021ec9ceebefdbc48b6ef86bc737534aae4cedbc0eff1198354bbe3cb8c7c6483e44ccf124466bd0d52931793aa114bff964b41b38ac5d773264a991c6bb9aae

Score

10^/10

guloader modiloader remcos orabank downloader persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

3.1.5 Pro

Botnet

ORABANK

C2

ns.atps-proximo.pt:2404

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%UserProfile%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
des
keylog_path
%AppData%
mouse_option
false
mutex
fes-MCZ4VD
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

Processes:

olieki.exeieinstal.exe

description	ioc	process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	olieki.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ieinstal.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

ieinstal.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	ieinstal.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\SYPHILIP = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ernringso\\olieki.exe"	ieinstal.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

Processes:

olieki.exeieinstal.exe

pid process

532 olieki.exe
4036 ieinstal.exe
4036 ieinstal.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

olieki.exe

description pid process target process

PID 532 set thread context of 4036 532 olieki.exe ieinstal.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

olieki.exe

pid process

532 olieki.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

olieki.exeieinstal.exe

pid process

532 olieki.exe
4036 ieinstal.exe

pid	process
532	olieki.exe
4036	ieinstal.exe
4036	ieinstal.exe

description	pid	process	target process
PID 532 set thread context of 4036	532	olieki.exe	ieinstal.exe

pid	process
532	olieki.exe

pid	process
532	olieki.exe
4036	ieinstal.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

olieki.exe

description	pid	process	target process
PID 532 wrote to memory of 4036	532	olieki.exe	ieinstal.exe
PID 532 wrote to memory of 4036	532	olieki.exe	ieinstal.exe
PID 532 wrote to memory of 4036	532	olieki.exe	ieinstal.exe
PID 532 wrote to memory of 4036	532	olieki.exe	ieinstal.exe

C:\Users\Admin\AppData\Local\Temp\olieki.exe
"C:\Users\Admin\AppData\Local\Temp\olieki.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:532

C:\Program Files (x86)\internet explorer\ieinstal.exe
"C:\Users\Admin\AppData\Local\Temp\olieki.exe"
2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:4036

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/532-116-0x0000000000620000-0x000000000062F000-memory.dmp

Filesize
60KB

Download
memory/532-118-0x0000000077CE0000-0x0000000077E6E000-memory.dmp

Filesize
1.6MB

Download
memory/532-117-0x00007FFB6BC10000-0x00007FFB6BDEB000-memory.dmp

Filesize
1.9MB

Download
memory/532-121-0x0000000077CE0000-0x0000000077E6E000-memory.dmp

Filesize
1.6MB

Download
memory/4036-119-0x0000000003200000-0x0000000003300000-memory.dmp

Filesize
1024KB

Download
memory/4036-120-0x0000000003200000-mapping.dmp

Download
memory/4036-123-0x0000000077CE0000-0x0000000077E6E000-memory.dmp

Filesize
1.6MB

Download
memory/4036-122-0x00007FFB6BC10000-0x00007FFB6BDEB000-memory.dmp

Filesize
1.9MB

Download
memory/4036-124-0x0000000077CE0000-0x0000000077E6E000-memory.dmp

Filesize
1.6MB

Download
memory/4036-126-0x000000001EB80000-0x000000001EB81000-memory.dmp

Filesize
4KB

Download
memory/4036-127-0x0000000000400000-0x0000000000553000-memory.dmp

Filesize
1.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads