remcos | a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958

General

Target

25860926414bf43383246f7c773a8d6c.exe
Size

4.6MB
MD5

25860926414bf43383246f7c773a8d6c
SHA1

760390a4a14df085f4c841067f52c79409cdc93e
SHA256

a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958
SHA512

61825ef1b03f5516f2820faae3dad01911054debb714b2162fd28cdc7c26199eb6174eddb3e48a4b200c350a083a561a58bd2724496fcb71e87d4492e2ec5a07
SSDEEP

98304:+pbYDHaUeRG/GnYDievJRVrQo4QGB0s53+sTH7/93veWGLRHHk:+pbu9e+qYDiQf1hfGWsBVb/rGLhE

Score

10^/10

remcos back-september discovery rat

Malware Config

Extracted

Family

remcos

Botnet

Back-September

C2

fullimmersion777.com:8090

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
hello.exe
copy_folder
windw
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
rimcsl-94LESJ
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

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	25860926414bf43383246f7c773a8d6c.exe

Executes dropped EXE 2 IoCs

pid	Process
4460	DZIPR.exe
1116	DZIPR.exe

Loads dropped DLL 2 IoCs

pid	Process
4460	DZIPR.exe
1116	DZIPR.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1116 set thread context of 1584	1116	DZIPR.exe	91

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\lnfast_x64.job	cmd.exe

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 5 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	25860926414bf43383246f7c773a8d6c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.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
4460	DZIPR.exe
1116	DZIPR.exe
1116	DZIPR.exe
1584	cmd.exe
1584	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1116	DZIPR.exe
1584	cmd.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 4460	2232	25860926414bf43383246f7c773a8d6c.exe	89
PID 2232 wrote to memory of 4460	2232	25860926414bf43383246f7c773a8d6c.exe	89
PID 2232 wrote to memory of 4460	2232	25860926414bf43383246f7c773a8d6c.exe	89
PID 4460 wrote to memory of 1116	4460	DZIPR.exe	90
PID 4460 wrote to memory of 1116	4460	DZIPR.exe	90
PID 4460 wrote to memory of 1116	4460	DZIPR.exe	90
PID 1116 wrote to memory of 1584	1116	DZIPR.exe	91
PID 1116 wrote to memory of 1584	1116	DZIPR.exe	91
PID 1116 wrote to memory of 1584	1116	DZIPR.exe	91
PID 1116 wrote to memory of 1584	1116	DZIPR.exe	91
PID 1584 wrote to memory of 4088	1584	cmd.exe	102
PID 1584 wrote to memory of 4088	1584	cmd.exe	102
PID 1584 wrote to memory of 4088	1584	cmd.exe	102
PID 1584 wrote to memory of 4088	1584	cmd.exe	102
PID 1584 wrote to memory of 4088	1584	cmd.exe	102

C:\Users\Admin\AppData\Local\Temp\25860926414bf43383246f7c773a8d6c.exe
"C:\Users\Admin\AppData\Local\Temp\25860926414bf43383246f7c773a8d6c.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\DZIPR.exe
  "C:\Users\Admin\DZIPR.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:4460
- - C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
    C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
    3⤵
    - 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:1116
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\SysWOW64\cmd.exe
      4⤵
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:1584
    - - C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4088

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4336,i,16316361669272684588,6171287487746154806,262144 --variations-seed-version --mojo-platform-channel-handle=4328 /prefetch:8
1⤵
PID:4680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\512aa202

Filesize
1.2MB

MD5
2222dddb8a736d079b2112b5390cb77e

SHA1
9b24839a23225a0b0dff3b2f19041d52f31d4f38

SHA256
1b6c59b9275ac1acc086862d2dada1f259d16f5d62c7103d28fa9f854f260b34

SHA512
cf1a7a91e6b98581e9918df6e9c1a857f27d91adb4c1e575f7b90472e94cb70d0d74e1aa051475b8bdfeb481dc25667627242eff0e2aa803f9a1b8a5768b5e0b

Download Submit
C:\Users\Admin\DZIPR.dll

Filesize
346KB

MD5
ad28d4167571382569d2384ffd7bd2a9

SHA1
efc7534bcb1645d4056702e073519f571d8db77b

SHA256
f919a8e63ec0f2f05ac01a6cab4088c13fbf14a38b071cfa9f710c9e069462eb

SHA512
8f28867b46dd7a801cbf70d8d7fe5f2bfb8654a417c40ba264faf81af8bb1a28e1a1200fdc9828a4a4c6df0a13817055290c16f9468d311b8d8049a2439348d9

Download Submit
C:\Users\Admin\DZIPR.exe

Filesize
8.4MB

MD5
ec9ce1d67f98072281015c7726fba245

SHA1
e89b16265acf4a251b527ddf22830f2650987263

SHA256
9ab4145d5525ae741b80f4e66f505abba59adcbe01868dfef84fbe4450634cc1

SHA512
21db8f3ae325021589de9c2489ab2ce6814722a17a92476a56147478aa9767ce5c4769169f287060cc08ad76019178ba547fcef32074ef1afb1926845e7158e1

Download Submit
C:\Users\Admin\ekqqtq

Filesize
952KB

MD5
4649f3a4e58c6040b07f6d486c149a71

SHA1
64f8fc631c5fb4e5f6bc20c207047d8e2b500587

SHA256
5d81ca77492946aa2cfe00349342de8cceb317d8649bedbfd95992dca885f184

SHA512
4e1b229d30403b594e992fe0893e568161c8d901fe20461093d11159ab03b5dd410d1834bc64ac4ccc39d4f6b072946703f06eeb982d79b1c9a1b773b57013b7

Download Submit
C:\Users\Admin\ipqtwm

Filesize
70KB

MD5
f125e72b3968ca233ef3c7e2f4db34e7

SHA1
4fb34044ef18cedbd3ede4272c44416d3f11735c

SHA256
ced30560c6c0fc15cbdbdbc0d480dca6b41ce3183057e43b419dd6814a33db92

SHA512
b645d1eb685a69b9ca9bbdb1f4638af8ae151ddfb9527c423f7779971246ed60f981ce26ce8af2fc7b63164e7c13e9c6e98a7f148831a1e59318e60e5a39f881

Download Submit
memory/1116-58-0x0000000072FF0000-0x000000007316B000-memory.dmp

Filesize
1.5MB

Download
memory/1116-54-0x0000000072FF0000-0x000000007316B000-memory.dmp

Filesize
1.5MB

Download
memory/1116-57-0x0000000072FF0000-0x000000007316B000-memory.dmp

Filesize
1.5MB

Download
memory/1116-56-0x0000000073003000-0x0000000073005000-memory.dmp

Filesize
8KB

Download
memory/1116-55-0x00007FFA440B0000-0x00007FFA442A5000-memory.dmp

Filesize
2.0MB

Download
memory/1116-60-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/1584-62-0x00007FFA440B0000-0x00007FFA442A5000-memory.dmp

Filesize
2.0MB

Download
memory/1584-64-0x0000000072FF0000-0x000000007316B000-memory.dmp

Filesize
1.5MB

Download
memory/1584-67-0x0000000072FF0000-0x000000007316B000-memory.dmp

Filesize
1.5MB

Download
memory/4088-73-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-74-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-80-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-69-0x00007FFA440B0000-0x00007FFA442A5000-memory.dmp

Filesize
2.0MB

Download
memory/4088-70-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-72-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-79-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-78-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-75-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-76-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4088-77-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/4460-40-0x0000000072FF0000-0x000000007316B000-memory.dmp

Filesize
1.5MB

Download
memory/4460-50-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/4460-41-0x00007FFA440B0000-0x00007FFA442A5000-memory.dmp

Filesize
2.0MB

Download

Analysis

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