remcos | 4380a6c169281e2474044f59954b9112843e337f105d68e1b446a4722c6e0590

General

Target

b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe
Size

1.4MB
MD5

b5f5e7aa484a9ecc43ae1b9ed6b5c191
SHA1

157fc3cdfc327a5c916ffd226dfa432deea8743c
SHA256

4380a6c169281e2474044f59954b9112843e337f105d68e1b446a4722c6e0590
SHA512

b19c272a9c091908cdac0895037b1ad835bf1b3776eb4c8c3e60cb72db878dcdd43bba5110328145343d0c3950466204d69689a1167008a4f6b6a6443234e0a2
SSDEEP

24576:Y6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ES:3Y9UORVOM1jJHzaiape0hsABFRJch6Lm

Score

10^/10

remcos graced rat rezer0 upx

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

GRACED

C2

thankyoulord.ddns.net:5050

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
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-0S5XD9
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

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral2/memory/4088-16-0x0000000004FE0000-0x000000000500C000-memory.dmp	rezer0

Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.

Query Registry
T1012

System Information Discovery
T1082

Processes:

test.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

4088 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
4088	test.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/232-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/232-5-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/232-32-0x0000000000400000-0x00000000006F1000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

test.exe

description pid process target process

PID 4088 set thread context of 2544 4088 test.exe vbc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exe

pid process

4328 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

test.exe

pid process

4088 test.exe
4088 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 4088 test.exe

description	pid	process	target process
PID 4088 set thread context of 2544	4088	test.exe	vbc.exe

pid	process
4328	schtasks.exe

pid	process
4088	test.exe
4088	test.exe

description	pid	process
Token: SeDebugPrivilege	4088	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

b5f5e7aa484a9ecc43ae1b9ed6b5c191.execmd.exetest.exe

description	pid	process	target process
PID 232 wrote to memory of 2356	232	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 232 wrote to memory of 2356	232	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 232 wrote to memory of 2356	232	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 2356 wrote to memory of 4088	2356	cmd.exe	test.exe
PID 2356 wrote to memory of 4088	2356	cmd.exe	test.exe
PID 2356 wrote to memory of 4088	2356	cmd.exe	test.exe
PID 4088 wrote to memory of 4328	4088	test.exe	schtasks.exe
PID 4088 wrote to memory of 4328	4088	test.exe	schtasks.exe
PID 4088 wrote to memory of 4328	4088	test.exe	schtasks.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe
PID 4088 wrote to memory of 2544	4088	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe
"C:\Users\Admin\AppData\Local\Temp\b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:232

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:2356

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4088

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpEDD6.tmp"
4⤵
- Creates scheduled task(s)
PID:4328

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2544

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=1036 --field-trial-handle=3240,i,13319578961094268484,16557498665191861597,262144 --variations-seed-version /prefetch:8
1⤵
PID:2388

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scripting

1

T1064

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe
Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpEDD6.tmp
Filesize
1KB

MD5
078b1e8425c21774a8acd2d4e7b1a361

SHA1
16d4eb2760a2fb99df662bd477e2cf86b22e7371

SHA256
c0e8dca78c46a93b116c0622ab79e9277753976601031aa5622358bc88215fbc

SHA512
c3005b549f84e94aeedfcd6c67945bb30033d68fedf0189be2634c488d94a5f268f0739daf310d2cbc053b5eef50320f6424415171e0feac7299b2c5556af662

Download Submit
memory/232-5-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/232-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/232-32-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2544-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-48-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-44-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-42-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-38-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-36-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2544-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4088-16-0x0000000004FE0000-0x000000000500C000-memory.dmp

Filesize
176KB

Download
memory/4088-31-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4088-7-0x0000000000020000-0x0000000000078000-memory.dmp

Filesize
352KB

Download
memory/4088-8-0x00000000051A0000-0x0000000005744000-memory.dmp

Filesize
5.6MB

Download
memory/4088-20-0x0000000004D90000-0x0000000004DA0000-memory.dmp

Filesize
64KB

Download
memory/4088-6-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4088-17-0x00000000050B0000-0x000000000514C000-memory.dmp

Filesize
624KB

Download
memory/4088-10-0x0000000004AC0000-0x0000000004B52000-memory.dmp

Filesize
584KB

Download
memory/4088-15-0x0000000074EE0000-0x0000000075690000-memory.dmp

Filesize
7.7MB

Download
memory/4088-14-0x0000000004A70000-0x0000000004A78000-memory.dmp

Filesize
32KB

Download
memory/4088-13-0x0000000004A80000-0x0000000004A8A000-memory.dmp

Filesize
40KB

Download
memory/4088-11-0x0000000004D90000-0x0000000004DA0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads