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/4652-7-0x0000000005A80000-0x0000000005AAC000-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-1-5-21-3803511929-1339359695-2191195476-1000\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 4652 set thread context of 4468 4652 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

372 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

pid process

4652 76e09018a833b7e5b8af82b649eb3a30.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

description pid process

Token: SeDebugPrivilege 4652 76e09018a833b7e5b8af82b649eb3a30.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

vbc.exe

pid process

4468 vbc.exe

description	pid	process	target process
PID 4652 set thread context of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe

pid	process
372	schtasks.exe

pid	process
4652	76e09018a833b7e5b8af82b649eb3a30.exe

description	pid	process
Token: SeDebugPrivilege	4652	76e09018a833b7e5b8af82b649eb3a30.exe

pid	process
4468	vbc.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

76e09018a833b7e5b8af82b649eb3a30.exe

description	pid	process	target process
PID 4652 wrote to memory of 372	4652	76e09018a833b7e5b8af82b649eb3a30.exe	schtasks.exe
PID 4652 wrote to memory of 372	4652	76e09018a833b7e5b8af82b649eb3a30.exe	schtasks.exe
PID 4652 wrote to memory of 372	4652	76e09018a833b7e5b8af82b649eb3a30.exe	schtasks.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	76e09018a833b7e5b8af82b649eb3a30.exe	vbc.exe
PID 4652 wrote to memory of 4468	4652	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:4652

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KCxDCJBgK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7D8C.tmp"
2⤵
- Creates scheduled task(s)
PID:372

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
"{path}"
2⤵
- Suspicious use of SetWindowsHookEx
PID:4468

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\tmp7D8C.tmp
Filesize
1KB

MD5
d396809ecb0f6d4aed443f14dc880f22

SHA1
657fa380d7d221c245edb66434aeacc5101470fe

SHA256
626a3f6c725d25eb20eea644f568046e555153309f22a6980801f5f08cbaa3d0

SHA512
ca2b220e4b9451c0a634f71c4580605290373366b180d9e572b5085784aaa6cfb243b46c1708e007f909c5786529ce4312b6bc5407c53cfcf16d1250465da72b

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

MD5
37cc12f236c9b1a6121f040d5af3561f

SHA1
f437fd9084e828690c84eb5550cc0cf3de1c9b6c

SHA256
9a57df5dff4f32f1c87c976f64eec551f7ffcab4f8e345b9edfbfed01a6a1d4b

SHA512
6688a14e273c5b31439b9a2763e7978b17e1f23f854240890318aa9165c015f97040346a5af1085384fafce72f4322b5f143e51df64d224f4e0f3331f7dcd3ac

Download Submit
memory/4468-36-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-46-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-23-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-21-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-58-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-52-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-26-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-14-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-42-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-17-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-61-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-29-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4468-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4652-4-0x00000000059C0000-0x00000000059D0000-memory.dmp

Filesize
64KB

Download
memory/4652-5-0x0000000005740000-0x000000000574A000-memory.dmp

Filesize
40KB

Download
memory/4652-3-0x00000000057B0000-0x0000000005842000-memory.dmp

Filesize
584KB

Download
memory/4652-0-0x0000000000CE0000-0x0000000000D3A000-memory.dmp

Filesize
360KB

Download
memory/4652-1-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/4652-18-0x0000000074AC0000-0x0000000075270000-memory.dmp

Filesize
7.7MB

Download
memory/4652-2-0x0000000005CC0000-0x0000000006264000-memory.dmp

Filesize
5.6MB

Download
memory/4652-8-0x0000000006370000-0x000000000640C000-memory.dmp

Filesize
624KB

Download
memory/4652-7-0x0000000005A80000-0x0000000005AAC000-memory.dmp

Filesize
176KB

Download
memory/4652-6-0x0000000005730000-0x0000000005738000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads