remcos | 8f395dc9ca7802646cec0791fa6272449371c9ec9867448a004067f2a243d8ce

Analysis

max time kernel
297s
max time network
295s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
24-05-2024 14:28

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General

Target

msimg32.dll
Size

45.1MB
MD5

2b0cd6422137c4f1c4496305467b95c4
SHA1

a4ede1255abdda3fc27347fc46a0b3b9fd963972
SHA256

d9ffb32f33d1f16ca20346890449d410edb025a631f40b277c692474ba0c0318
SHA512

b1e8e238ccabf4be29d862d49191345a52310be178b1eb3b305cb2277877f948c14860a9fb95df1b93b6a01bb234217cc7cddedbd3ebdcd1e92b7ff05dd1a0a6
SSDEEP

786432:oUP7GCGO7t0Srkx/tC0SzIdSwh/WxbpNHQD3trzRp2:oUP7GCG6iSrkx1hSzYsHQD3t/RY

Score

10^/10

remcos remotehost rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

deytrycooldown.duckdns.org:7070

Attributes

audio_folder
MicRecords
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
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-TYSCJG
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2072	regsvr32.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000_Classes\Local Settings	rundll32.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: 33	1212	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1212	AUDIODG.EXE
Token: 33	1212	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1212	AUDIODG.EXE

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2500	AcroRd32.exe
2500	AcroRd32.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 788 wrote to memory of 2072	788	regsvr32.exe	28
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 2072 wrote to memory of 2064	2072	regsvr32.exe	29
PID 3004 wrote to memory of 2500	3004	rundll32.exe	39
PID 3004 wrote to memory of 2500	3004	rundll32.exe	39
PID 3004 wrote to memory of 2500	3004	rundll32.exe	39
PID 3004 wrote to memory of 2500	3004	rundll32.exe	39

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\msimg32.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:788
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\msimg32.dll
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of WriteProcessMemory
  PID:2072
- - C:\Windows\SysWOW64\regsvr32.exe
    "C:\Windows\SysWOW64\regsvr32.exe"
    3⤵
    PID:2064

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:576

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x1ac
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1212

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\msimg32.dll
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
  "C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\msimg32.dll"
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:2500

C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\msimg32.dll"
1⤵
PID:2536

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Adobe\Acrobat\9.0\SharedDataEvents

Filesize
3KB

MD5
59f17a591bb6c2cea06b4cb8f8217514

SHA1
10b750980f262d5959322a485bf7df602ed5b498

SHA256
2de50b24f0789eabd838b4a28e03f3c26584524cd8cf125c2661b697ef69eb82

SHA512
2067253b7477a2e14ddf8d0d7f4e8e2ebd9a0ebd6c2a540ced3a3fc13bc616f761e778a46fee797d38c5dbb0bb5f17c1363b3a050c452bcc7811206723159259

Download Submit
memory/2064-23-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-42-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-64-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-63-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-61-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-15-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-24-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-43-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-41-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-6-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/2064-5-0x0000000000090000-0x0000000000091000-memory.dmp

Filesize
4KB

Download
memory/2064-3-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2064-2-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-18-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-40-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-20-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-38-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-22-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-36-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-16-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-21-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-26-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-27-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-28-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-37-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-30-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-32-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-33-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2064-34-0x0000000000150000-0x00000000001D2000-memory.dmp

Filesize
520KB

Download
memory/2072-29-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2072-10-0x0000000012D71000-0x0000000012D75000-memory.dmp

Filesize
16KB

Download
memory/2072-19-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2072-0-0x0000000010000000-0x0000000012DD5000-memory.dmp

Filesize
45.8MB

Download
memory/2072-8-0x0000000012D66000-0x0000000012D6E000-memory.dmp

Filesize
32KB

Download
memory/2072-1-0x00000000102E6000-0x0000000010300000-memory.dmp

Filesize
104KB

Download
memory/2072-9-0x0000000012D6E000-0x0000000012D75000-memory.dmp

Filesize
28KB

Download
memory/2072-11-0x0000000012D76000-0x0000000012D7A000-memory.dmp

Filesize
16KB

Download
memory/2072-12-0x0000000012D7A000-0x0000000012DA7000-memory.dmp

Filesize
180KB

Download
memory/2072-13-0x0000000012D7E000-0x0000000012DA7000-memory.dmp

Filesize
164KB

Download
memory/2072-14-0x0000000012DA8000-0x0000000012DD5000-memory.dmp

Filesize
180KB

Download