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
behavioral1/memory/2980-9-0x00000000009F0000-0x0000000000A1C000-memory.dmp	rezer0

Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

2980 test.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2936 cmd.exe

pid	process
2980	test.exe

pid	process
2936	cmd.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2328-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral1/memory/2328-10-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral1/memory/2328-29-0x0000000000400000-0x00000000006F1000-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 2980 set thread context of 2552 2980 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

2688 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

2980 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 2980 test.exe

description	pid	process	target process
PID 2980 set thread context of 2552	2980	test.exe	vbc.exe

pid	process
2688	schtasks.exe

pid	process
2980	test.exe

description	pid	process
Token: SeDebugPrivilege	2980	test.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

b5f5e7aa484a9ecc43ae1b9ed6b5c191.execmd.exetest.exe

description	pid	process	target process
PID 2328 wrote to memory of 2936	2328	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 2328 wrote to memory of 2936	2328	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 2328 wrote to memory of 2936	2328	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 2328 wrote to memory of 2936	2328	b5f5e7aa484a9ecc43ae1b9ed6b5c191.exe	cmd.exe
PID 2936 wrote to memory of 2980	2936	cmd.exe	test.exe
PID 2936 wrote to memory of 2980	2936	cmd.exe	test.exe
PID 2936 wrote to memory of 2980	2936	cmd.exe	test.exe
PID 2936 wrote to memory of 2980	2936	cmd.exe	test.exe
PID 2980 wrote to memory of 2688	2980	test.exe	schtasks.exe
PID 2980 wrote to memory of 2688	2980	test.exe	schtasks.exe
PID 2980 wrote to memory of 2688	2980	test.exe	schtasks.exe
PID 2980 wrote to memory of 2688	2980	test.exe	schtasks.exe
PID 2980 wrote to memory of 2692	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2692	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2692	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2692	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	test.exe	vbc.exe
PID 2980 wrote to memory of 2552	2980	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:2328

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2936

C:\Users\Admin\AppData\Local\Temp\test.exe
test.exe
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2980

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6B31.tmp"
4⤵
- Creates scheduled task(s)
PID:2688

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2692

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:2552

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

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\tmp6B31.tmp
Filesize
1KB

MD5
883ab936ffa81df7c257076db374fe6c

SHA1
0d3afed7e4051adf0629d923beb6e359a7f6a958

SHA256
237db64743324f57343218a69aadd14e9c3259c0330f70819c3721b3798190fd

SHA512
471dc7cf09a0615b78e0ac3385f9c6c9d0ed62080d28ec1ec429ea9b2156931489e8763af698917c43e02fbb6fc6f08d1f68ae3565be12606311c1ea6fa5d3b0

Download Submit
\Users\Admin\AppData\Local\Temp\test.exe
Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
memory/2328-10-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2328-29-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2328-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2552-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-53-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-51-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-16-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-17-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-18-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-21-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-22-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2552-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-49-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-47-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-45-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-43-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-39-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2552-41-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2980-9-0x00000000009F0000-0x0000000000A1C000-memory.dmp

Filesize
176KB

Download
memory/2980-5-0x0000000000AE0000-0x0000000000B38000-memory.dmp

Filesize
352KB

Download
memory/2980-6-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/2980-26-0x00000000746A0000-0x0000000074D8E000-memory.dmp

Filesize
6.9MB

Download
memory/2980-7-0x0000000000870000-0x00000000008B0000-memory.dmp

Filesize
256KB

Download
memory/2980-8-0x00000000003B0000-0x00000000003B8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads