remcos | 92af5439d1fc0172fcd8068957d132fb89256ab1d93457120e7b4f1a1910e757

General

Target

scr_previw.exe
Size

2.2MB
MD5

d9530ecee42acccfd3871672a511bc9e
SHA1

89b4d2406f1294bd699ef231a4def5f495f12778
SHA256

81e04f9a131534acc0e9de08718c062d3d74c80c7f168ec7e699cd4b2bd0f280
SHA512

d5f048ea995affdf9893ec4c5ac5eb188b6714f5b6712e0b5a316702033421b145b8ee6a62d303eb4576bf8f57273ff35c5d675807563a31157136f79d8a9980
SSDEEP

49152:rHOut2Bf0ajIM8XEEN6N0rE/I/vqn7krQEQusd5F:VbaMbXbE/I/SnwrQEQusd/

Score

10^/10

remcos stalagg discovery rat

Malware Config

Extracted

Family

remcos

Botnet

stalagg

C2

5.181.156.117:8576

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-5TL39W
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

Executes dropped EXE 1 IoCs

pid	Process
2752	scr_previw.exe

Loads dropped DLL 3 IoCs

pid	Process
2432	scr_previw.exe
2752	scr_previw.exe
2564	cmd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2752 set thread context of 2564	2752	scr_previw.exe	32

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scr_previw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scr_previw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2432	scr_previw.exe
2752	scr_previw.exe
2752	scr_previw.exe
2564	cmd.exe
2564	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2752	scr_previw.exe
2564	cmd.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2432 wrote to memory of 2752	2432	scr_previw.exe	31
PID 2432 wrote to memory of 2752	2432	scr_previw.exe	31
PID 2432 wrote to memory of 2752	2432	scr_previw.exe	31
PID 2432 wrote to memory of 2752	2432	scr_previw.exe	31
PID 2752 wrote to memory of 2564	2752	scr_previw.exe	32
PID 2752 wrote to memory of 2564	2752	scr_previw.exe	32
PID 2752 wrote to memory of 2564	2752	scr_previw.exe	32
PID 2752 wrote to memory of 2564	2752	scr_previw.exe	32
PID 2752 wrote to memory of 2564	2752	scr_previw.exe	32
PID 2564 wrote to memory of 1800	2564	cmd.exe	34
PID 2564 wrote to memory of 1800	2564	cmd.exe	34
PID 2564 wrote to memory of 1800	2564	cmd.exe	34
PID 2564 wrote to memory of 1800	2564	cmd.exe	34
PID 2564 wrote to memory of 1800	2564	cmd.exe	34
PID 2564 wrote to memory of 1800	2564	cmd.exe	34

C:\Users\Admin\AppData\Local\Temp\scr_previw.exe
"C:\Users\Admin\AppData\Local\Temp\scr_previw.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2432
- C:\Users\Admin\AppData\Roaming\SuperSync_test\scr_previw.exe
  C:\Users\Admin\AppData\Roaming\SuperSync_test\scr_previw.exe
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\SysWOW64\cmd.exe
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2564
  - - C:\Windows\SysWOW64\explorer.exe
      C:\Windows\SysWOW64\explorer.exe
      4⤵
      System Location Discovery: System Language Discovery
      PID:1800

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\e36d3442

Filesize
1.2MB

MD5
273ce3c65b67f3809e8668f83a7e10c9

SHA1
e6fc0c02d7a09eb5fd0bddadd7130e3e29cf7cb2

SHA256
a22f25657fc4d0bd2fc1bf8b377210d14ae6d8f32000407ca5eb20f84446d865

SHA512
59046f21f51f6952a465691d915e6ac1e7c4299869570db91df6e15f3f9317b830abd353f95a578bb4015225f2dd154304885ee55146efc40f8db55060cc6559

Download Submit
C:\Users\Admin\AppData\Roaming\SuperSync_test\d3dx9_43.dll

Filesize
1.9MB

MD5
46e435aecb557fcb16ae2ea3b22ab7fd

SHA1
5290156599fd9575c4401c80949ad5672fe64da5

SHA256
70e0b720bb461503acbd947a8355fb629d703b8d7f99ddfbb09a0c71886861da

SHA512
621010aa44868062361c6dbb670f8664c370ddcb0afbb5835765470522c03bb5ac779e86236cfffdcf343cbc582f81beacd2a7108d78c90d4dfc4c38e7d23bb3

Download Submit
C:\Users\Admin\AppData\Roaming\SuperSync_test\rnyt

Filesize
1.0MB

MD5
289d2d639e058b63ebe16bd8d543115d

SHA1
969736e5f6a2c416f556e2f73358020573486afc

SHA256
f21bf56c8d15824dc1cf4108725f73154b88a89ab23f00a7f8dbb2d2de8e2568

SHA512
7adf83c9795d9705c4c1345422d17ad26b6d4f27a8242674f44b2d2a05080e532d9a64c43803164bf25c4e9eb5cac7a0d3789d71e9f34b46b5b9c6203fad65aa

Download Submit
C:\Users\Admin\AppData\Roaming\SuperSync_test\scr_previw.exe

Filesize
2.2MB

MD5
d9530ecee42acccfd3871672a511bc9e

SHA1
89b4d2406f1294bd699ef231a4def5f495f12778

SHA256
81e04f9a131534acc0e9de08718c062d3d74c80c7f168ec7e699cd4b2bd0f280

SHA512
d5f048ea995affdf9893ec4c5ac5eb188b6714f5b6712e0b5a316702033421b145b8ee6a62d303eb4576bf8f57273ff35c5d675807563a31157136f79d8a9980

Download Submit
C:\Users\Admin\AppData\Roaming\SuperSync_test\tkjm

Filesize
80KB

MD5
cae9827c507632c4a1980479c21a42a2

SHA1
d9a1c5900a93066645bf8fb7c79dacf56f3eaa3e

SHA256
efeec4c2f612130ec81f3796bba26471e14dcf97b0e22247b7c7f40ad2eba0cf

SHA512
441fb631ed26bfe5b84c4fd267a43fbacc64e0adae0e90d0d8e11a248fa2ab47d43a54f1cc3903532943d158d87a2e236976830834545b0d13471731b6f61768

Download Submit
memory/1800-82-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-71-0x00000000770C0000-0x0000000077269000-memory.dmp

Filesize
1.7MB

Download
memory/1800-85-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-84-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-83-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-78-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-81-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-77-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-80-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-79-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-86-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-72-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1800-75-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2432-0-0x00000000743A0000-0x0000000074514000-memory.dmp

Filesize
1.5MB

Download
memory/2432-1-0x00000000770C0000-0x0000000077269000-memory.dmp

Filesize
1.7MB

Download
memory/2564-69-0x0000000074380000-0x00000000744F4000-memory.dmp

Filesize
1.5MB

Download
memory/2564-76-0x0000000074380000-0x00000000744F4000-memory.dmp

Filesize
1.5MB

Download
memory/2564-23-0x00000000770C0000-0x0000000077269000-memory.dmp

Filesize
1.7MB

Download
memory/2564-21-0x0000000074380000-0x00000000744F4000-memory.dmp

Filesize
1.5MB

Download
memory/2752-19-0x0000000074380000-0x00000000744F4000-memory.dmp

Filesize
1.5MB

Download
memory/2752-17-0x0000000074393000-0x0000000074395000-memory.dmp

Filesize
8KB

Download
memory/2752-18-0x0000000074380000-0x00000000744F4000-memory.dmp

Filesize
1.5MB

Download
memory/2752-16-0x00000000770C0000-0x0000000077269000-memory.dmp

Filesize
1.7MB

Download
memory/2752-15-0x0000000074380000-0x00000000744F4000-memory.dmp

Filesize
1.5MB

Download

Analysis

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