remcos | 46c77fe1672dbf3bc3442e6958d4a00d1c2a1c89fe48642b86f5b67df540854c

General

Target

d5f6cbcdfdf98f268ea19abad222da54.exe
Size

1.4MB
MD5

d5f6cbcdfdf98f268ea19abad222da54
SHA1

005bf113195bf2d10b4c1f0b607a9a060150f00e
SHA256

46c77fe1672dbf3bc3442e6958d4a00d1c2a1c89fe48642b86f5b67df540854c
SHA512

f55c79f8fdf7ec4c19d34ee30d5afb1bf4a234155d1a4ea35e20dd22513261129196b5ba4104c4fb552f94cc7124ce342933f517bcc4d7c533af04a640495273
SSDEEP

24576:Y6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6EQ:3Y9UORVOM1jJHzaiape0hsABFRJch6LU

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/2492-12-0x0000000005920000-0x000000000594C000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

2492 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
2492	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4040-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4040-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4040-27-0x0000000000400000-0x00000000006F1000-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 2492 set thread context of 3308 2492 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

736 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

test.exe

pid process

2492 test.exe
2492 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 2492 test.exe

description	pid	process	target process
PID 2492 set thread context of 3308	2492	test.exe	vbc.exe

pid	process
736	schtasks.exe

pid	process
2492	test.exe
2492	test.exe

description	pid	process
Token: SeDebugPrivilege	2492	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

d5f6cbcdfdf98f268ea19abad222da54.execmd.exetest.exe

description	pid	process	target process
PID 4040 wrote to memory of 3572	4040	d5f6cbcdfdf98f268ea19abad222da54.exe	cmd.exe
PID 4040 wrote to memory of 3572	4040	d5f6cbcdfdf98f268ea19abad222da54.exe	cmd.exe
PID 4040 wrote to memory of 3572	4040	d5f6cbcdfdf98f268ea19abad222da54.exe	cmd.exe
PID 3572 wrote to memory of 2492	3572	cmd.exe	test.exe
PID 3572 wrote to memory of 2492	3572	cmd.exe	test.exe
PID 3572 wrote to memory of 2492	3572	cmd.exe	test.exe
PID 2492 wrote to memory of 736	2492	test.exe	schtasks.exe
PID 2492 wrote to memory of 736	2492	test.exe	schtasks.exe
PID 2492 wrote to memory of 736	2492	test.exe	schtasks.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe
PID 2492 wrote to memory of 3308	2492	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\d5f6cbcdfdf98f268ea19abad222da54.exe
"C:\Users\Admin\AppData\Local\Temp\d5f6cbcdfdf98f268ea19abad222da54.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4040

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:3572

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:2492

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA037.tmp"
4⤵
- Creates scheduled task(s)
PID:736

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3308

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\tmpA037.tmp
Filesize
1KB

MD5
f5042699e980c642a984748e668a72f7

SHA1
d5170ade056a67324aec91beaa6d009ff7997d91

SHA256
a8d5d990a6222b206e51e480cd92197b98aff8d80be67a61a4824659bdf9ca60

SHA512
76a06f325d2f960c36083f480f27437a199a600d1fc8caf79531c51c1af2335695a5513a35b37ee570ede26467e3c33f2d36d330cc530c761170ae21bb37874a

Download Submit
memory/2492-13-0x0000000006180000-0x000000000621C000-memory.dmp

Filesize
624KB

Download
memory/2492-5-0x0000000000A50000-0x0000000000AA8000-memory.dmp

Filesize
352KB

Download
memory/2492-7-0x0000000005A30000-0x0000000005FD4000-memory.dmp

Filesize
5.6MB

Download
memory/2492-8-0x0000000005520000-0x00000000055B2000-memory.dmp

Filesize
584KB

Download
memory/2492-9-0x0000000005680000-0x0000000005690000-memory.dmp

Filesize
64KB

Download
memory/2492-10-0x00000000054B0000-0x00000000054BA000-memory.dmp

Filesize
40KB

Download
memory/2492-11-0x00000000054A0000-0x00000000054A8000-memory.dmp

Filesize
32KB

Download
memory/2492-12-0x0000000005920000-0x000000000594C000-memory.dmp

Filesize
176KB

Download
memory/2492-25-0x00000000749E0000-0x0000000075190000-memory.dmp

Filesize
7.7MB

Download
memory/2492-6-0x00000000749E0000-0x0000000075190000-memory.dmp

Filesize
7.7MB

Download
memory/3308-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3308-49-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4040-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4040-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4040-27-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads