remcos | 7efeb4811ef77fae50d31a0339adb04721eb2c02e5cbbddb561702458ae3c17c

General

Target

74817386836617f5db8e51800c5564eb.exe
Size

1.4MB
MD5

74817386836617f5db8e51800c5564eb
SHA1

599bac4561fab987f919989d6e875a2c10afefb6
SHA256

7efeb4811ef77fae50d31a0339adb04721eb2c02e5cbbddb561702458ae3c17c
SHA512

dcb70f7c1b89b2d1473b1752745b565488579b5be03ea93e81f16a172769e391fdeadea3d97ab5e5810189c1968294a8700d15bdaad7377b2ef56cfffc6fd060
SSDEEP

24576:96yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6ES:sY9UORVOM1jJHzaiape0hsABFRJch6Lm

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/1720-9-0x00000000007D0000-0x00000000007FC000-memory.dmp	rezer0

Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

1720 test.exe
Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid process

2188 cmd.exe

pid	process
1720	test.exe

pid	process
2188	cmd.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1680-1-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral1/memory/1680-25-0x0000000000400000-0x00000000006F1000-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 1720 set thread context of 2692 1720 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

2564 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

1720 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 1720 test.exe

description	pid	process	target process
PID 1720 set thread context of 2692	1720	test.exe	vbc.exe

pid	process
2564	schtasks.exe

pid	process
1720	test.exe

description	pid	process
Token: SeDebugPrivilege	1720	test.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

74817386836617f5db8e51800c5564eb.execmd.exetest.exe

description	pid	process	target process
PID 1680 wrote to memory of 2188	1680	74817386836617f5db8e51800c5564eb.exe	cmd.exe
PID 1680 wrote to memory of 2188	1680	74817386836617f5db8e51800c5564eb.exe	cmd.exe
PID 1680 wrote to memory of 2188	1680	74817386836617f5db8e51800c5564eb.exe	cmd.exe
PID 1680 wrote to memory of 2188	1680	74817386836617f5db8e51800c5564eb.exe	cmd.exe
PID 2188 wrote to memory of 1720	2188	cmd.exe	test.exe
PID 2188 wrote to memory of 1720	2188	cmd.exe	test.exe
PID 2188 wrote to memory of 1720	2188	cmd.exe	test.exe
PID 2188 wrote to memory of 1720	2188	cmd.exe	test.exe
PID 1720 wrote to memory of 2564	1720	test.exe	schtasks.exe
PID 1720 wrote to memory of 2564	1720	test.exe	schtasks.exe
PID 1720 wrote to memory of 2564	1720	test.exe	schtasks.exe
PID 1720 wrote to memory of 2564	1720	test.exe	schtasks.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe
PID 1720 wrote to memory of 2692	1720	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\74817386836617f5db8e51800c5564eb.exe
"C:\Users\Admin\AppData\Local\Temp\74817386836617f5db8e51800c5564eb.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1680

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2188

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:1720

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3C84.tmp"
4⤵
- Creates scheduled task(s)
PID:2564

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

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

Replay Monitor

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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\tmp3C84.tmp
Filesize
1KB

MD5
988e4c836725c089ec97ed6469441bee

SHA1
9cfb8a02160889208de53d7c7fcc8e49aa51ab64

SHA256
00c218d8762d067ffbc9d2682d719b145a1b3b3a3d5dd06bdd050a011e107108

SHA512
daaf2ddcc65e9028cf58eb901dc77c5497001cf109215255dd88c391d82f264271c23d6d4ae027f7cc02844275a6a2c7b3bb5f6b71abd0c45fb8631a2b708377

Download Submit
memory/1680-1-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1680-25-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1720-24-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/1720-5-0x0000000000F50000-0x0000000000FA8000-memory.dmp

Filesize
352KB

Download
memory/1720-6-0x0000000073F80000-0x000000007466E000-memory.dmp

Filesize
6.9MB

Download
memory/1720-7-0x0000000004C30000-0x0000000004C70000-memory.dmp

Filesize
256KB

Download
memory/1720-8-0x0000000000390000-0x0000000000398000-memory.dmp

Filesize
32KB

Download
memory/1720-9-0x00000000007D0000-0x00000000007FC000-memory.dmp

Filesize
176KB

Download
memory/2692-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-17-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-16-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-15-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-21-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2692-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-18-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-36-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-38-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-40-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-42-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-44-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-46-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-48-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-50-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-52-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2692-54-0x0000000000400000-0x0000000000420000-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