remcos | e8c99084a1463da796851669d5929cbfe937d29ffa5f255730a4971ff9b90663

General

Target

691d58591a71abafe5376788536a7478.exe
Size

1.4MB
MD5

691d58591a71abafe5376788536a7478
SHA1

fd29752e1dec4e5c24e1de4f27d177ca5d9e1acc
SHA256

e8c99084a1463da796851669d5929cbfe937d29ffa5f255730a4971ff9b90663
SHA512

4e848ba845cd9afbfb297d5acac3ea6e4ce781ab9b3bdbcaa43a3e7fadf6ff3c925c2d2b7d5d1b1318067e770f92b5b987b3686a47cb121627c8e48f794a32e9
SSDEEP

24576:76yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ED:mY9UORVOM1jJHzaiape0hsABFRJch6L/

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/1232-12-0x0000000005C20000-0x0000000005C4C000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

1232 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
1232	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4792-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4792-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4792-25-0x0000000000400000-0x00000000006F1000-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 1232 set thread context of 5036 1232 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

956 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

1232 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 1232 test.exe

description	pid	process	target process
PID 1232 set thread context of 5036	1232	test.exe	vbc.exe

pid	process
956	schtasks.exe

pid	process
1232	test.exe

description	pid	process
Token: SeDebugPrivilege	1232	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

691d58591a71abafe5376788536a7478.execmd.exetest.exe

description	pid	process	target process
PID 4792 wrote to memory of 4488	4792	691d58591a71abafe5376788536a7478.exe	cmd.exe
PID 4792 wrote to memory of 4488	4792	691d58591a71abafe5376788536a7478.exe	cmd.exe
PID 4792 wrote to memory of 4488	4792	691d58591a71abafe5376788536a7478.exe	cmd.exe
PID 4488 wrote to memory of 1232	4488	cmd.exe	test.exe
PID 4488 wrote to memory of 1232	4488	cmd.exe	test.exe
PID 4488 wrote to memory of 1232	4488	cmd.exe	test.exe
PID 1232 wrote to memory of 956	1232	test.exe	schtasks.exe
PID 1232 wrote to memory of 956	1232	test.exe	schtasks.exe
PID 1232 wrote to memory of 956	1232	test.exe	schtasks.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe
PID 1232 wrote to memory of 5036	1232	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\691d58591a71abafe5376788536a7478.exe
"C:\Users\Admin\AppData\Local\Temp\691d58591a71abafe5376788536a7478.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4792

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:4488

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:1232

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp72EE.tmp"
4⤵
- Creates scheduled task(s)
PID:956

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:5036

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\tmp72EE.tmp
Filesize
1KB

MD5
d40e064a23945d0f354bcf571e5a36f4

SHA1
7e053fc9aafdb2e88d1c778a5aee4a9893a79654

SHA256
6a2a96901fe68a345d46d9edbb08e48e4ec9475572fa3c16c9ec799916f81a58

SHA512
9caf3055ecae13017c7c82b5aafd5e3815739da02a1dc27043551b61c2f21e12d53ffcab1a1343ec93bdfd3ff81820acdae4697cd431afaded0b09859cdebeba

Download Submit
memory/1232-9-0x0000000005A20000-0x0000000005A30000-memory.dmp

Filesize
64KB

Download
memory/1232-24-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/1232-7-0x0000000005D50000-0x00000000062F4000-memory.dmp

Filesize
5.6MB

Download
memory/1232-8-0x0000000005840000-0x00000000058D2000-memory.dmp

Filesize
584KB

Download
memory/1232-10-0x00000000057D0000-0x00000000057DA000-memory.dmp

Filesize
40KB

Download
memory/1232-11-0x00000000057C0000-0x00000000057C8000-memory.dmp

Filesize
32KB

Download
memory/1232-12-0x0000000005C20000-0x0000000005C4C000-memory.dmp

Filesize
176KB

Download
memory/1232-13-0x00000000064A0000-0x000000000653C000-memory.dmp

Filesize
624KB

Download
memory/1232-5-0x0000000000D70000-0x0000000000DC8000-memory.dmp

Filesize
352KB

Download
memory/1232-6-0x0000000074DA0000-0x0000000075550000-memory.dmp

Filesize
7.7MB

Download
memory/4792-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4792-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4792-25-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/5036-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-42-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5036-52-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads