remcos | 56d5edac4d0d6570b34900251cc0106257253eb47d88a5339b0378554de4f2d7

General

Target

76e09018a833b7e5b8af82b649eb3a30.exe
Size

335KB
MD5

76e09018a833b7e5b8af82b649eb3a30
SHA1

8d0040f43006e8a4268587e44b7168f185426d64
SHA256

56d5edac4d0d6570b34900251cc0106257253eb47d88a5339b0378554de4f2d7
SHA512

1ff47dedd147c1929653d2b051d2c73a7787ffc7b6b88c36fbb030658b3829a7a14a7156441eaf4ebb172ea5a6d4905b04a510e7161b4b4d0a6b091fcf714d79
SSDEEP

6144:j6RLqSY6oAlR1OqkhT4NTdseAeFfVxjvZwTfD9gTG9HO5pKpAhNrl:j6RL8gP1OFhsjs+Ff3jvGThgTaHO5B/h

Score

10^/10

remcos remotehost rat rezer0

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

RemoteHost

C2

youngboss1994.ddns.net:1965

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-E4WDQB
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/1808-7-0x0000000005720000-0x000000000574C000-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:

76e09018a833b7e5b8af82b649eb3a30.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	76e09018a833b7e5b8af82b649eb3a30.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064
Suspicious use of SetThreadContext 1 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

description pid process target process

PID 1808 set thread context of 628 1808 76e09018a833b7e5b8af82b649eb3a30.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

716 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

pid process

1808 76e09018a833b7e5b8af82b649eb3a30.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

description pid process

Token: SeDebugPrivilege 1808 76e09018a833b7e5b8af82b649eb3a30.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

628 vbc.exe

description	pid	process	target process
PID 1808 set thread context of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe

pid	process
716	schtasks.exe

pid	process
1808	76e09018a833b7e5b8af82b649eb3a30.exe

description	pid	process
Token: SeDebugPrivilege	1808	76e09018a833b7e5b8af82b649eb3a30.exe

pid	process
628	vbc.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

description	pid	process	target process
PID 1808 wrote to memory of 716	1808	76e09018a833b7e5b8af82b649eb3a30.exe	schtasks.exe
PID 1808 wrote to memory of 716	1808	76e09018a833b7e5b8af82b649eb3a30.exe	schtasks.exe
PID 1808 wrote to memory of 716	1808	76e09018a833b7e5b8af82b649eb3a30.exe	schtasks.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 1808 wrote to memory of 628	1808	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\76e09018a833b7e5b8af82b649eb3a30.exe
"C:\Users\Admin\AppData\Local\Temp\76e09018a833b7e5b8af82b649eb3a30.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1808

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KCxDCJBgK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1539.tmp"
2⤵
- Creates scheduled task(s)
PID:716

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
2⤵
- Suspicious use of SetWindowsHookEx
PID:628

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\tmp1539.tmp
Filesize
1KB

MD5
dcba3bbf8c4b532b3a23b21eded71e1e

SHA1
e42f5f71ab4285dbcb9057865e843860d10853bc

SHA256
5860852300992d6ec2f451749edc82c100e9e2ebeb4c5b5d801f8df9f7cfe792

SHA512
656dcf54a3020d80a93e4e3d156c75f192ec15b215b60acb9866f750962704f800f0b1c8c4faa530513d0852eaa7005eab86c81663f005a4b85e81ae566725d3

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat
Filesize
74B

MD5
cb17c2975cd134c36178fffed336650e

SHA1
4e9dc8e1a6c3c6bf4904750dcf7e4396f8b88646

SHA256
bc075eb71e8b0429889fe9448348f3723d1f811d68cb210703567b27820047c0

SHA512
b92a2e9bed86b3b191d5e7eb54308d04060ec9275ddae8e650c405b9b06451d4e5362e5789cff50ea38743b728d882ad46f4049b65c459871357c0eb894df191

Download Submit
memory/628-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-53-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-50-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-37-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-47-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-14-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-17-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/628-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/1808-6-0x0000000005350000-0x0000000005358000-memory.dmp

Filesize
32KB

Download
memory/1808-18-0x0000000074430000-0x0000000074BE0000-memory.dmp

Filesize
7.7MB

Download
memory/1808-7-0x0000000005720000-0x000000000574C000-memory.dmp

Filesize
176KB

Download
memory/1808-8-0x0000000005F30000-0x0000000005FCC000-memory.dmp

Filesize
624KB

Download
memory/1808-1-0x0000000074430000-0x0000000074BE0000-memory.dmp

Filesize
7.7MB

Download
memory/1808-5-0x0000000005360000-0x000000000536A000-memory.dmp

Filesize
40KB

Download
memory/1808-4-0x0000000005590000-0x00000000055A0000-memory.dmp

Filesize
64KB

Download
memory/1808-3-0x00000000052B0000-0x0000000005342000-memory.dmp

Filesize
584KB

Download
memory/1808-2-0x0000000005980000-0x0000000005F24000-memory.dmp

Filesize
5.6MB

Download
memory/1808-0-0x0000000000870000-0x00000000008CA000-memory.dmp

Filesize
360KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads