remcos | 75f6fa2b6b27e284e274706113a51d756d313d7326cb515d77abf7617c4a8295

General

Target

Aaqaybpuu.exe
Size

4.9MB
MD5

a06614c188d065ad72275761891c0f00
SHA1

dfe7e3037ea5ea699c6491988b09e207818a3793
SHA256

75f6fa2b6b27e284e274706113a51d756d313d7326cb515d77abf7617c4a8295
SHA512

c79445dbf40f71673cf5950450b6001ab51a43383d5dd3319343b5e45517d6ea46c4f61f361f3c560bc5851afbf2024dab248a90b22dba9f6abe29727946df06
SSDEEP

24576:8ahlMa/PkO7hTqcaIqZUFUMIzsqZXr46240TNdv3pPZmypz:

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Version

2.7.1 Pro

Botnet

RemoteHost

C2

79.142.69.160:24103

127.0.0.1:24103

10.9.239.161:24103

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-RQ9NAF
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

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	Aaqaybpuu.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Xrhfmjp = "\"C:\\Users\\Admin\\AppData\\Roaming\\Qjovnqqka\\Xrhfmjp.exe\""	Aaqaybpuu.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4664 set thread context of 2780	4664	Aaqaybpuu.exe	93

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1132	powershell.exe
1132	powershell.exe
3444	powershell.exe
3444	powershell.exe
4664	Aaqaybpuu.exe
4664	Aaqaybpuu.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4664	Aaqaybpuu.exe
Token: SeDebugPrivilege	1132	powershell.exe
Token: SeDebugPrivilege	3444	powershell.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 1132	4664	Aaqaybpuu.exe	81
PID 4664 wrote to memory of 1132	4664	Aaqaybpuu.exe	81
PID 4664 wrote to memory of 1132	4664	Aaqaybpuu.exe	81
PID 4664 wrote to memory of 1868	4664	Aaqaybpuu.exe	89
PID 4664 wrote to memory of 1868	4664	Aaqaybpuu.exe	89
PID 4664 wrote to memory of 1868	4664	Aaqaybpuu.exe	89
PID 1868 wrote to memory of 3444	1868	cmd.exe	91
PID 1868 wrote to memory of 3444	1868	cmd.exe	91
PID 1868 wrote to memory of 3444	1868	cmd.exe	91
PID 4664 wrote to memory of 2276	4664	Aaqaybpuu.exe	92
PID 4664 wrote to memory of 2276	4664	Aaqaybpuu.exe	92
PID 4664 wrote to memory of 2276	4664	Aaqaybpuu.exe	92
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93
PID 4664 wrote to memory of 2780	4664	Aaqaybpuu.exe	93

C:\Users\Admin\AppData\Local\Temp\Aaqaybpuu.exe
"C:\Users\Admin\AppData\Local\Temp\Aaqaybpuu.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1132
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1868
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -ENC cwBlAHQALQBtAHAAcAByAGUAZgBlAHIAZQBuAGMAZQAgAC0AZQB4AGMAbAB1AHMAaQBvAG4AcABhAHQAaAAgAEMAOgBcAA==
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3444
- C:\Users\Admin\AppData\Local\Temp\Aaqaybpuu.exe
  C:\Users\Admin\AppData\Local\Temp\Aaqaybpuu.exe
  2⤵
  PID:2276
- C:\Users\Admin\AppData\Local\Temp\Aaqaybpuu.exe
  C:\Users\Admin\AppData\Local\Temp\Aaqaybpuu.exe
  2⤵
  PID:2780

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
4280e36a29fa31c01e4d8b2ba726a0d8

SHA1
c485c2c9ce0a99747b18d899b71dfa9a64dabe32

SHA256
e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

SHA512
494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
9f6d18a12a625e33d8575a4ff5324e83

SHA1
92bce377ecd0fb12ab3ed84c90048aac9a8744cc

SHA256
7bb2322ed183d05117cc45a70831bde6c649746c4e7d9b1230eeba1311b4a7bf

SHA512
be4a457ec29015526bb2e2b72809fe7e8d5e5fd17f1fce8283ec64d0ba2548682dc006bdf13cc0865c91f97fe867418fb215a79896b94626bf2758a63d2f766a

Download Submit
memory/1132-135-0x0000000003350000-0x0000000003386000-memory.dmp

Filesize
216KB

Download
memory/1132-136-0x0000000005B20000-0x0000000006148000-memory.dmp

Filesize
6.2MB

Download
memory/1132-137-0x0000000006250000-0x00000000062B6000-memory.dmp

Filesize
408KB

Download
memory/1132-138-0x0000000006330000-0x0000000006396000-memory.dmp

Filesize
408KB

Download
memory/1132-139-0x0000000006940000-0x000000000695E000-memory.dmp

Filesize
120KB

Download
memory/1132-140-0x0000000007F90000-0x000000000860A000-memory.dmp

Filesize
6.5MB

Download
memory/1132-141-0x0000000006E40000-0x0000000006E5A000-memory.dmp

Filesize
104KB

Download
memory/2780-151-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2780-161-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2780-148-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/2780-150-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/3444-154-0x0000000070630000-0x000000007067C000-memory.dmp

Filesize
304KB

Download
memory/3444-153-0x0000000006C70000-0x0000000006CA2000-memory.dmp

Filesize
200KB

Download
memory/3444-155-0x0000000005F40000-0x0000000005F5E000-memory.dmp

Filesize
120KB

Download
memory/3444-156-0x0000000006DC0000-0x0000000006DCA000-memory.dmp

Filesize
40KB

Download
memory/3444-157-0x0000000007010000-0x00000000070A6000-memory.dmp

Filesize
600KB

Download
memory/3444-158-0x00000000053B0000-0x00000000053BE000-memory.dmp

Filesize
56KB

Download
memory/3444-159-0x0000000006F70000-0x0000000006F8A000-memory.dmp

Filesize
104KB

Download
memory/3444-160-0x0000000006F50000-0x0000000006F58000-memory.dmp

Filesize
32KB

Download
memory/4664-133-0x0000000006A80000-0x0000000006AA2000-memory.dmp

Filesize
136KB

Download
memory/4664-132-0x0000000000790000-0x0000000000C76000-memory.dmp

Filesize
4.9MB

Download

Analysis

Sharing