guloader | 43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb

General

Target

43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exe
Size

383KB
MD5

23e67f856583bc4edbab6d66fb5d3519
SHA1

335d696e7448570c632dc0b6f3aadfe69262d2ef
SHA256

43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb
SHA512

893f81e5c0a8e64b4a2ab2edee73b7867255154191cd73ca9faddfc3c7c68454689dc3b297c7cf3bb51f14f3910fb9c0ff6f1ce5f1139961a8153e54c9868ffc
SSDEEP

6144:HT4DtVpZI3UNWc3n5C3Tsc8XANjZ8S+ztjsNtsZ7X9/wkm8mKuUE2OCQpPAvFeVY:HTgYEztxwquUfNQZAvsl9pSTlDt

Score

10^/10

guloader remcos top downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Top

Attributes

audio_folder
MicRecords
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
keylog_crypt
false
keylog_file
mqerms.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
alpwovnb-G3F5OR
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Startup key = "%Flerbrugerudgave% -windowstyle minimized $remontering=(Get-ItemProperty -Path 'HKCU:\\Forklaringsmodellen\\').Jeanna228;%Flerbrugerudgave% ($remontering)"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

1432 wab.exe
1432 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

powershell.exewab.exe

pid process

1308 powershell.exe
1432 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 1308 set thread context of 1432 1308 powershell.exe wab.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

reg.exe

pid process

1104 reg.exe

pid	process
1432	wab.exe
1432	wab.exe

description	pid	process	target process
PID 1308 set thread context of 1432	1308	powershell.exe	wab.exe

pid	process
1104	reg.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe

pid	process
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

powershell.exe

pid process

1308 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 1308 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

1432 wab.exe

description	pid	process
Token: SeDebugPrivilege	1308	powershell.exe

pid	process
1432	wab.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exepowershell.exewab.execmd.exe

description	pid	process	target process
PID 2388 wrote to memory of 1308	2388	43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exe	powershell.exe
PID 2388 wrote to memory of 1308	2388	43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exe	powershell.exe
PID 2388 wrote to memory of 1308	2388	43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exe	powershell.exe
PID 1308 wrote to memory of 3700	1308	powershell.exe	cmd.exe
PID 1308 wrote to memory of 3700	1308	powershell.exe	cmd.exe
PID 1308 wrote to memory of 3700	1308	powershell.exe	cmd.exe
PID 1308 wrote to memory of 1432	1308	powershell.exe	wab.exe
PID 1308 wrote to memory of 1432	1308	powershell.exe	wab.exe
PID 1308 wrote to memory of 1432	1308	powershell.exe	wab.exe
PID 1308 wrote to memory of 1432	1308	powershell.exe	wab.exe
PID 1308 wrote to memory of 1432	1308	powershell.exe	wab.exe
PID 1432 wrote to memory of 4068	1432	wab.exe	cmd.exe
PID 1432 wrote to memory of 4068	1432	wab.exe	cmd.exe
PID 1432 wrote to memory of 4068	1432	wab.exe	cmd.exe
PID 4068 wrote to memory of 1104	4068	cmd.exe	reg.exe
PID 4068 wrote to memory of 1104	4068	cmd.exe	reg.exe
PID 4068 wrote to memory of 1104	4068	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exe
"C:\Users\Admin\AppData\Local\Temp\43319fa796c6b542426e4e853a26a12d9a1cd49687878484a5bae88d246600cb.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2388

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" -windowstyle hidden "$Deserting=Get-Content 'C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\jebliksbilledes\Unrelative\Sikkativers\Regredieredes\Fastkurspolitikken.Vol';$teksthjden=$Deserting.SubString(61567,3);.$teksthjden($Deserting)"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1308

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" "/c set /A 1^^0"
3⤵
PID:3700

C:\Program Files (x86)\windows mail\wab.exe
"C:\Program Files (x86)\windows mail\wab.exe"
3⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1432

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Flerbrugerudgave% -windowstyle minimized $remontering=(Get-ItemProperty -Path 'HKCU:\Forklaringsmodellen\').Jeanna228;%Flerbrugerudgave% ($remontering)"
4⤵
- Suspicious use of WriteProcessMemory
PID:4068

C:\Windows\SysWOW64\reg.exe
REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Startup key" /t REG_EXPAND_SZ /d "%Flerbrugerudgave% -windowstyle minimized $remontering=(Get-ItemProperty -Path 'HKCU:\Forklaringsmodellen\').Jeanna228;%Flerbrugerudgave% ($remontering)"
5⤵
- Adds Run key to start application
- Modifies registry key
PID:1104

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4136 --field-trial-handle=2692,i,8678872182442199182,12502579059484928042,262144 --variations-seed-version /prefetch:8
1⤵
PID:700

Network

MITRE ATT&CK Matrix ATT&CK v13

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

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2yqykul0.yey.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\Venstremnd\Kontraktforhandling\Bosnian48\Oprindelsers\Jernindustriers16.War
Filesize
317KB

MD5
28f1c6b709a58427fc3ee47df638ed75

SHA1
bf77edc7db52ff80241230e47dddc8273d3fe645

SHA256
d91eed61446e903f869aef5a8cbb79838fb433c35a1395c7b4d73589cc9cb5ba

SHA512
d193d9053b9ab401a56e2c939e98c2ad6fa55dede94ca4a61e8fc71c5427b4c8ca29964efed314676b1ff578d5b1a6328944816dfd01164deb3d1405ce44add4

Download Submit
C:\Users\Admin\AppData\Local\tjurhane\fasciolidae\stinksvampen\jebliksbilledes\Unrelative\Sikkativers\Regredieredes\Fastkurspolitikken.Vol
Filesize
60KB

MD5
2a4c059165f67c3923409c13eb335f08

SHA1
327454ea9cef3b257a7a154bc75aa1dac1dc77d1

SHA256
f383eb80238916fd6c00c1513464f841fefb622aad04f345f4bc69f8a24aa8b1

SHA512
d1d1898f852d9fb3af766fea3e06ffefad91af0bc4d5652716103f6f2151118b5129d8c9707fcaf14d3e16654f7148163b80ec03a3e2a4bbb036575666392560

Download Submit
memory/1308-28-0x0000000007990000-0x0000000007F34000-memory.dmp

Filesize
5.6MB

Download
memory/1308-7-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-6-0x0000000002B40000-0x0000000002B76000-memory.dmp

Filesize
216KB

Download
memory/1308-10-0x0000000005200000-0x0000000005266000-memory.dmp

Filesize
408KB

Download
memory/1308-30-0x00000000085C0000-0x0000000008C3A000-memory.dmp

Filesize
6.5MB

Download
memory/1308-13-0x00000000053A0000-0x0000000005406000-memory.dmp

Filesize
408KB

Download
memory/1308-17-0x0000000005B50000-0x0000000005EA4000-memory.dmp

Filesize
3.3MB

Download
memory/1308-22-0x0000000006150000-0x000000000616E000-memory.dmp

Filesize
120KB

Download
memory/1308-23-0x0000000006540000-0x000000000658C000-memory.dmp

Filesize
304KB

Download
memory/1308-24-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-25-0x0000000007340000-0x00000000073D6000-memory.dmp

Filesize
600KB

Download
memory/1308-32-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-27-0x00000000066B0000-0x00000000066D2000-memory.dmp

Filesize
136KB

Download
memory/1308-4-0x0000000073F20000-0x00000000746D0000-memory.dmp

Filesize
7.7MB

Download
memory/1308-9-0x0000000005160000-0x0000000005182000-memory.dmp

Filesize
136KB

Download
memory/1308-8-0x0000000005420000-0x0000000005A48000-memory.dmp

Filesize
6.2MB

Download
memory/1308-26-0x0000000006660000-0x000000000667A000-memory.dmp

Filesize
104KB

Download
memory/1308-5-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-34-0x0000000007660000-0x0000000007664000-memory.dmp

Filesize
16KB

Download
memory/1308-36-0x0000000073F20000-0x00000000746D0000-memory.dmp

Filesize
7.7MB

Download
memory/1308-37-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-38-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-39-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-40-0x0000000004DE0000-0x0000000004DF0000-memory.dmp

Filesize
64KB

Download
memory/1308-41-0x0000000008C40000-0x000000000E6D9000-memory.dmp

Filesize
90.6MB

Download
memory/1308-42-0x0000000077971000-0x0000000077A91000-memory.dmp

Filesize
1.1MB

Download
memory/1308-52-0x0000000073F20000-0x00000000746D0000-memory.dmp

Filesize
7.7MB

Download
memory/1432-49-0x0000000000F40000-0x0000000002194000-memory.dmp

Filesize
18.3MB

Download
memory/1432-51-0x00000000021A0000-0x0000000007C39000-memory.dmp

Filesize
90.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads