remcos | 6b5d40270357e2fff44e775f9555488c4d460e0840e78d4b94a054a0ace691bf

General

Target

92f3841f65b0af124325d6a54162cac5.exe
Size

1.4MB
MD5

92f3841f65b0af124325d6a54162cac5
SHA1

b77dd03de69b73d934fbb203c352cd4bf43d0bcb
SHA256

6b5d40270357e2fff44e775f9555488c4d460e0840e78d4b94a054a0ace691bf
SHA512

9f59587d4a0c9c92db0a3f1a01e6e5b51008073ab11a48df905ba56f61327ec5e0958e971375dadbf8c33c1fb27b71a264db5840c8f2a7732fdd956755159eb2
SSDEEP

24576:96yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6E7:sY9UORVOM1jJHzaiape0hsABFRJch6Lv

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/5096-12-0x0000000005320000-0x000000000534C000-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

5096 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
5096	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4192-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4192-24-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4192-27-0x0000000000400000-0x00000000006F1000-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 5096 set thread context of 5044 5096 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

4572 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

5096 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 5096 test.exe

description	pid	process	target process
PID 5096 set thread context of 5044	5096	test.exe	vbc.exe

pid	process
4572	schtasks.exe

pid	process
5096	test.exe

description	pid	process
Token: SeDebugPrivilege	5096	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

92f3841f65b0af124325d6a54162cac5.execmd.exetest.exe

description	pid	process	target process
PID 4192 wrote to memory of 2304	4192	92f3841f65b0af124325d6a54162cac5.exe	cmd.exe
PID 4192 wrote to memory of 2304	4192	92f3841f65b0af124325d6a54162cac5.exe	cmd.exe
PID 4192 wrote to memory of 2304	4192	92f3841f65b0af124325d6a54162cac5.exe	cmd.exe
PID 2304 wrote to memory of 5096	2304	cmd.exe	test.exe
PID 2304 wrote to memory of 5096	2304	cmd.exe	test.exe
PID 2304 wrote to memory of 5096	2304	cmd.exe	test.exe
PID 5096 wrote to memory of 4572	5096	test.exe	schtasks.exe
PID 5096 wrote to memory of 4572	5096	test.exe	schtasks.exe
PID 5096 wrote to memory of 4572	5096	test.exe	schtasks.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe
PID 5096 wrote to memory of 5044	5096	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\92f3841f65b0af124325d6a54162cac5.exe
"C:\Users\Admin\AppData\Local\Temp\92f3841f65b0af124325d6a54162cac5.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4192

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:2304

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:5096

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6EF6.tmp"
4⤵
- Creates scheduled task(s)
PID:4572

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:5044

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\tmp6EF6.tmp
Filesize
1KB

MD5
9723c06541ad7bbfc2915228736b121d

SHA1
5aa17dcd4490497e67f4918f991bf10f0b117000

SHA256
f6e0363560785935100a4aaeb9a90e4646b110d94df67bf4d7e22f43d890cc98

SHA512
76226d54204d87e55862a8bc05073013663de6700ebf83a62d7a9e49ea90e29392d13bc12985a7e2a76be35446d21f92c5a078429fd65618be6d459f605cf247

Download Submit
memory/4192-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4192-27-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4192-24-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/5044-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-51-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-47-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-43-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-39-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5044-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/5096-8-0x0000000005000000-0x0000000005092000-memory.dmp

Filesize
584KB

Download
memory/5096-6-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/5096-5-0x0000000000590000-0x00000000005E8000-memory.dmp

Filesize
352KB

Download
memory/5096-9-0x00000000051B0000-0x00000000051C0000-memory.dmp

Filesize
64KB

Download
memory/5096-25-0x0000000074D30000-0x00000000754E0000-memory.dmp

Filesize
7.7MB

Download
memory/5096-7-0x0000000005510000-0x0000000005AB4000-memory.dmp

Filesize
5.6MB

Download
memory/5096-12-0x0000000005320000-0x000000000534C000-memory.dmp

Filesize
176KB

Download
memory/5096-13-0x0000000005C60000-0x0000000005CFC000-memory.dmp

Filesize
624KB

Download
memory/5096-11-0x0000000004FE0000-0x0000000004FE8000-memory.dmp

Filesize
32KB

Download
memory/5096-10-0x0000000004FF0000-0x0000000004FFA000-memory.dmp

Filesize
40KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads