remcos | 4c201df380edb8b733306f0082b9b075ef0c53ae1b9a44d6a87ba24aec255cce

General

Target

7a984bf728b7169341dd20d75a0d6408.exe
Size

1.4MB
MD5

7a984bf728b7169341dd20d75a0d6408
SHA1

25533a5d814cb645e30a17dc93c25ec30aec16e7
SHA256

4c201df380edb8b733306f0082b9b075ef0c53ae1b9a44d6a87ba24aec255cce
SHA512

373b7ef9ab4b7ba70b60f73f8edf2e8a2b4c63a19048bef64fb00872dca52d0821fadcc2cbce035f75fdd2fc1f03c4241951a34c10a917d7db0f20b11c01f763
SSDEEP

24576:+6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6E7:JY9UORVOM1jJHzaiape0hsABFRJch6Lv

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/4644-12-0x0000000005750000-0x000000000577C000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation test.exe
Executes dropped EXE 1 IoCs

Processes:

test.exe

pid process

4644 test.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation	test.exe

pid	process
4644	test.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4796-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4796-14-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/4796-28-0x0000000000400000-0x00000000006F1000-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 4644 set thread context of 3524 4644 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

4552 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

test.exe

pid process

4644 test.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

test.exe

description pid process

Token: SeDebugPrivilege 4644 test.exe

description	pid	process	target process
PID 4644 set thread context of 3524	4644	test.exe	vbc.exe

pid	process
4552	schtasks.exe

pid	process
4644	test.exe

description	pid	process
Token: SeDebugPrivilege	4644	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

Processes:

7a984bf728b7169341dd20d75a0d6408.execmd.exetest.exe

description	pid	process	target process
PID 4796 wrote to memory of 1680	4796	7a984bf728b7169341dd20d75a0d6408.exe	cmd.exe
PID 4796 wrote to memory of 1680	4796	7a984bf728b7169341dd20d75a0d6408.exe	cmd.exe
PID 4796 wrote to memory of 1680	4796	7a984bf728b7169341dd20d75a0d6408.exe	cmd.exe
PID 1680 wrote to memory of 4644	1680	cmd.exe	test.exe
PID 1680 wrote to memory of 4644	1680	cmd.exe	test.exe
PID 1680 wrote to memory of 4644	1680	cmd.exe	test.exe
PID 4644 wrote to memory of 4552	4644	test.exe	schtasks.exe
PID 4644 wrote to memory of 4552	4644	test.exe	schtasks.exe
PID 4644 wrote to memory of 4552	4644	test.exe	schtasks.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe
PID 4644 wrote to memory of 3524	4644	test.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\7a984bf728b7169341dd20d75a0d6408.exe
"C:\Users\Admin\AppData\Local\Temp\7a984bf728b7169341dd20d75a0d6408.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4796

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c test.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:1680

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:4644

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp14AC.tmp"
4⤵
- Creates scheduled task(s)
PID:4552

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
4⤵
PID:3524

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\tmp14AC.tmp
Filesize
1KB

MD5
859c4191858dce96857f7f2047ab98e6

SHA1
4ad02320552ed76b7bdf9e557f513e02287932bc

SHA256
71489d4455e2859445744a0c0561fc22db662fc47b77d7349b173ebee303912c

SHA512
02ff1f58648581e1a4b4972df601eaac703d96a4fd5b3aa4d373850c280407704351731e9d47ca137f77b10c1cf2b9592712b510b741b2573682ceed16e0c6b4

Download Submit
memory/3524-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-46-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-33-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-21-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3524-48-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4644-9-0x00000000051C0000-0x00000000051D0000-memory.dmp

Filesize
64KB

Download
memory/4644-13-0x0000000005E60000-0x0000000005EFC000-memory.dmp

Filesize
624KB

Download
memory/4644-12-0x0000000005750000-0x000000000577C000-memory.dmp

Filesize
176KB

Download
memory/4644-27-0x00000000748F0000-0x00000000750A0000-memory.dmp

Filesize
7.7MB

Download
memory/4644-11-0x00000000051E0000-0x00000000051E8000-memory.dmp

Filesize
32KB

Download
memory/4644-10-0x0000000005290000-0x000000000529A000-memory.dmp

Filesize
40KB

Download
memory/4644-8-0x00000000051F0000-0x0000000005282000-memory.dmp

Filesize
584KB

Download
memory/4644-7-0x00000000058B0000-0x0000000005E54000-memory.dmp

Filesize
5.6MB

Download
memory/4644-6-0x0000000000790000-0x00000000007E8000-memory.dmp

Filesize
352KB

Download
memory/4644-5-0x00000000748F0000-0x00000000750A0000-memory.dmp

Filesize
7.7MB

Download
memory/4796-14-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4796-28-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/4796-0-0x0000000000400000-0x00000000006F1000-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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