remcos | eae87b9a3b47e1c46e3261065051f18f2ebe1047eb00f2cad8ae018402a12ddb

General

Target

76344a986ad26a83b789803a9d347a40.exe
Size

1.4MB
MD5

76344a986ad26a83b789803a9d347a40
SHA1

a57a2f18792a92ad9a84fe05c837ccdc2459a2f3
SHA256

eae87b9a3b47e1c46e3261065051f18f2ebe1047eb00f2cad8ae018402a12ddb
SHA512

ca18a6b1c1997eba40087051cf58a1df62845174dc8a65452ba3416c8df339e25d175e3fc0fc60d1f240e6518792e83a886fd7249583e8f60d24d73b5f6bf4bd
SSDEEP

24576:B6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6Eb:IY9UORVOM1jJHzaiape0hsABFRJch6L3

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/116-12-0x0000000005500000-0x000000000552C000-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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

116 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
116	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/1548-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/1548-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/1548-27-0x0000000000400000-0x00000000006F1000-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 116 set thread context of 5004 116 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

2180 schtasks.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

test.exe

pid process

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

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 116 test.exe

description	pid	process	target process
PID 116 set thread context of 5004	116	test.exe	vbc.exe

pid	process
2180	schtasks.exe

pid	process
116	test.exe
116	test.exe
116	test.exe

description	pid	process
Token: SeDebugPrivilege	116	test.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

76344a986ad26a83b789803a9d347a40.execmd.exetest.exe

description	pid	process	target process
PID 1548 wrote to memory of 3016	1548	76344a986ad26a83b789803a9d347a40.exe	cmd.exe
PID 1548 wrote to memory of 3016	1548	76344a986ad26a83b789803a9d347a40.exe	cmd.exe
PID 1548 wrote to memory of 3016	1548	76344a986ad26a83b789803a9d347a40.exe	cmd.exe
PID 3016 wrote to memory of 116	3016	cmd.exe	test.exe
PID 3016 wrote to memory of 116	3016	cmd.exe	test.exe
PID 3016 wrote to memory of 116	3016	cmd.exe	test.exe
PID 116 wrote to memory of 2180	116	test.exe	schtasks.exe
PID 116 wrote to memory of 2180	116	test.exe	schtasks.exe
PID 116 wrote to memory of 2180	116	test.exe	schtasks.exe
PID 116 wrote to memory of 3760	116	test.exe	vbc.exe
PID 116 wrote to memory of 3760	116	test.exe	vbc.exe
PID 116 wrote to memory of 3760	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe
PID 116 wrote to memory of 5004	116	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\76344a986ad26a83b789803a9d347a40.exe
"C:\Users\Admin\AppData\Local\Temp\76344a986ad26a83b789803a9d347a40.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1548

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:3016

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:116

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6A72.tmp"
4⤵
- Creates scheduled task(s)
PID:2180

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3760

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:5004

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

Replay Monitor

Loading Replay Monitor...

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\tmp6A72.tmp
Filesize
1KB

MD5
9723c06541ad7bbfc2915228736b121d

SHA1
5aa17dcd4490497e67f4918f991bf10f0b117000

SHA256
f6e0363560785935100a4aaeb9a90e4646b110d94df67bf4d7e22f43d890cc98

SHA512
76226d54204d87e55862a8bc05073013663de6700ebf83a62d7a9e49ea90e29392d13bc12985a7e2a76be35446d21f92c5a078429fd65618be6d459f605cf247

Download Submit
memory/116-9-0x0000000005410000-0x0000000005420000-memory.dmp

Filesize
64KB

Download
memory/116-5-0x0000000000880000-0x00000000008D8000-memory.dmp

Filesize
352KB

Download
memory/116-8-0x0000000005240000-0x00000000052D2000-memory.dmp

Filesize
584KB

Download
memory/116-10-0x00000000051A0000-0x00000000051AA000-memory.dmp

Filesize
40KB

Download
memory/116-11-0x0000000002C40000-0x0000000002C48000-memory.dmp

Filesize
32KB

Download
memory/116-13-0x0000000005EA0000-0x0000000005F3C000-memory.dmp

Filesize
624KB

Download
memory/116-12-0x0000000005500000-0x000000000552C000-memory.dmp

Filesize
176KB

Download
memory/116-24-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/116-7-0x0000000005750000-0x0000000005CF4000-memory.dmp

Filesize
5.6MB

Download
memory/116-6-0x0000000074650000-0x0000000074E00000-memory.dmp

Filesize
7.7MB

Download
memory/1548-27-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1548-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1548-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/5004-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5004-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads