remcos | 20a6b7999fb3ff90688026a1c27ba38b36a2b164f949fc340373832388abf727

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/01/2024, 14:56

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General

Target

a4b8aa74ad2cbd0637fde253fe274e83.exe
Size

1.3MB
MD5

a4b8aa74ad2cbd0637fde253fe274e83
SHA1

33fcb9720d1995b44b04851ef407e6ad0e50a268
SHA256

20a6b7999fb3ff90688026a1c27ba38b36a2b164f949fc340373832388abf727
SHA512

82ee46fc2122fae3d168e06f0fdb39090135d6a5464072fa7ba74799a2bd18a98eb68f7e1b34b23f46641322e930e10f5cde38a956672f3d0f1ee09e17c181d3
SSDEEP

24576:BAHnh+eWsN3skA4RV1Hom2KXMmHadTm8wSntzVmaziyUqtkRzUhUzLqtkg5:Yh+ZkldoPK8YadHw812BjRzUhwLqtT

Score

10^/10

remcos remotehost collection rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

107.175.229.139:8087

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
5
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
yes.png
keylog_flag
false
keylog_folder
aka
keylog_path
%AppData%
mouse_option
false
mutex
jhudguiytgu-AAHEXC
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

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3404-60-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView
behavioral2/memory/3404-56-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4132-50-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4132-65-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 6 IoCs

resource	yara_rule
behavioral2/memory/4132-50-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3404-60-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/3404-56-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral2/memory/3360-63-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3360-62-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4132-65-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\name.vbs	name.exe

Executes dropped EXE 4 IoCs

pid	Process
4824	name.exe
4132	name.exe
3404	name.exe
3360	name.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	name.exe

AutoIT Executable 5 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x0003000000022718-13.dat	autoit_exe
behavioral2/files/0x0003000000022718-14.dat	autoit_exe
behavioral2/files/0x0003000000022718-42.dat	autoit_exe
behavioral2/files/0x0003000000022718-45.dat	autoit_exe
behavioral2/files/0x0003000000022718-52.dat	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4824 set thread context of 4132	4824	name.exe	97
PID 4824 set thread context of 3404	4824	name.exe	98
PID 4824 set thread context of 3360	4824	name.exe	99

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4132	name.exe
4132	name.exe
3360	name.exe
3360	name.exe
4132	name.exe
4132	name.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
4824	name.exe
4824	name.exe
4824	name.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3360	name.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4808 wrote to memory of 4824	4808	a4b8aa74ad2cbd0637fde253fe274e83.exe	94
PID 4808 wrote to memory of 4824	4808	a4b8aa74ad2cbd0637fde253fe274e83.exe	94
PID 4808 wrote to memory of 4824	4808	a4b8aa74ad2cbd0637fde253fe274e83.exe	94
PID 4824 wrote to memory of 4132	4824	name.exe	97
PID 4824 wrote to memory of 4132	4824	name.exe	97
PID 4824 wrote to memory of 4132	4824	name.exe	97
PID 4824 wrote to memory of 4132	4824	name.exe	97
PID 4824 wrote to memory of 3404	4824	name.exe	98
PID 4824 wrote to memory of 3404	4824	name.exe	98
PID 4824 wrote to memory of 3404	4824	name.exe	98
PID 4824 wrote to memory of 3404	4824	name.exe	98
PID 4824 wrote to memory of 3360	4824	name.exe	99
PID 4824 wrote to memory of 3360	4824	name.exe	99
PID 4824 wrote to memory of 3360	4824	name.exe	99
PID 4824 wrote to memory of 3360	4824	name.exe	99

C:\Users\Admin\AppData\Local\Temp\a4b8aa74ad2cbd0637fde253fe274e83.exe
"C:\Users\Admin\AppData\Local\Temp\a4b8aa74ad2cbd0637fde253fe274e83.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4808
- C:\Users\Admin\AppData\Local\directory\name.exe
  "C:\Users\Admin\AppData\Local\Temp\a4b8aa74ad2cbd0637fde253fe274e83.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4824
- - C:\Users\Admin\AppData\Local\directory\name.exe
    C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\deyvhradngjjnjushnaxrblmowwmdwjgn"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    PID:4132
- - C:\Users\Admin\AppData\Local\directory\name.exe
    C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\fgdgi"
    3⤵
    - Executes dropped EXE
    - Accesses Microsoft Outlook accounts
    PID:3404
- - C:\Users\Admin\AppData\Local\directory\name.exe
    C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\qajzacezp"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
4KB

MD5
fdaa8866c905accc6ed1cb0f204b0f2c

SHA1
cf3a1f2d3841e3d52f3875df2bc1ff667ba8c774

SHA256
96db24a652541fb09e22d3dc23495c0475a4dbd2bd2dd6bb4d2aa98b1ae591ad

SHA512
02fae866918ca0250be91c2b85baf1a65d5cb295e6f995f0814c0a20ad1192a78f44b8a456bf1b52c9e202d523e7685157cbd2930bec483481463b7926309f2f

Download Submit
C:\Users\Admin\AppData\Local\Temp\underbalanced

Filesize
29KB

MD5
6095b3a6322d084d755577894297de0f

SHA1
b8c97c4350364e2157376b90f0b66a40e9bfbbea

SHA256
bfd80df7b9ce9e3299227cbb03fa95142bed451d842b50a0523bcaa532ae7a06

SHA512
7700d0090e812b3c195246df71901c51383c810b962aafd94f006caa7e3353a83308fb905c3800488ed1300d4c7cd49602696f1871db9fa20bb7efe8d9940427

Download Submit
C:\Users\Admin\AppData\Local\directory\name.exe

Filesize
2.4MB

MD5
92be7bd812e3d1dbef1a35f9b3a24b84

SHA1
0b94f227f832e8f98a1e1aca7db721c945551281

SHA256
c22fad63b760a3223c66be5445096bdbef8e892a82d4e4e339f95b3167a3ae3e

SHA512
d0285ba2ed99bf4e0d790454303d18ca710eac1e7bfada9cdb4f323fc8326596ea115123a45b5287f84f9cac9373e55073eaaa54034221eb856527c67dc5fcef

Download Submit
C:\Users\Admin\AppData\Local\directory\name.exe

Filesize
2.8MB

MD5
38df23fb5a7b5503528422147e32fee1

SHA1
b610459e6cf42496543ccb99a76d5cf5d7804cbb

SHA256
c71fc5add23095cb8cd59d5e8904ceabcba45a2915da7381a06b6fea51bb7b5c

SHA512
06c015df97209972077822c33043793e1c378b7b241b05f30932d707baf2cfbf890e72a30a9c2c2cde910305647fe055e7cb6180c536ae7cfcf692ea55db9fe4

Download Submit
C:\Users\Admin\AppData\Local\directory\name.exe

Filesize
2.2MB

MD5
6f8de56d2037c8ad8084f3dfc35741eb

SHA1
8b7f81ed658a3730aa4e6fb10a4ee3c67f64471e

SHA256
b2270175eff35604d9267bd213ba72aff27bc2c534a647f172c91f508b675865

SHA512
04efe6c3033506a291b573200d03297721917a087f6a5a81c3caf9b9a08d987ee97ad1694d6998c20d30ab0a6ef21bb017bc7bd4f594762d6f57740bd8269142

Download Submit
C:\Users\Admin\AppData\Local\directory\name.exe

Filesize
2.5MB

MD5
7d3924e7f4e69e0d134eefac59e982ac

SHA1
6ac759af10077e4f9caa206848594336f00a15be

SHA256
a0bc5b0408958a0c356be56fc653642e7ab5b68688423c6b0e332becdb36a473

SHA512
920d8cd2c09a00adb472a4ae84be9a50573698cd81394a635e6813c7b615727005f4deeb823b921071068abb635be72c34bc3fc74488d825328ee3620b05b1c8

Download Submit
C:\Users\Admin\AppData\Local\directory\name.exe

Filesize
2.6MB

MD5
3dca99b930dce4d5fb1ecc3e64e77123

SHA1
0a56b07a43d774011e1be9901e73ed60d25b3c78

SHA256
c0b5876fc17699e8e648f84af3a70dcb28dcaec4586f3b612f681fe249824796

SHA512
6af2239144f1949728d6f3553bc5b96a39c2e6d4753d03edbfa2547e006b3814c4a46aecf7fbd054c180192ba928c6c447b9a2d99983b567cd5ba1906c10e737

Download Submit
C:\Users\Admin\AppData\Roaming\aka\yes.png

Filesize
144B

MD5
ab60012bdc08732d712b655c641e5a5c

SHA1
88d1fd4548fc3d37a0465e7f90abf8a0600ca90a

SHA256
10ee1b7ba14408c421130b3b589f185c2a8fca4a7e490283d5ffca0145bb4c94

SHA512
d4ca93c37a94f476e66e34a65de86aa931f9fb5a7a48d283243e6c12ad68a64d3b3aaa824a398ded3a707323a45762658fac93ae0aa738eabe6442e3f5c05cdc

Download Submit
memory/3360-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3360-62-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3360-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3360-63-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3404-48-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3404-60-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3404-56-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3404-43-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/3404-54-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/4132-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4132-65-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4132-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4132-50-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4808-10-0x0000000000C70000-0x0000000000C74000-memory.dmp

Filesize
16KB

Download
memory/4824-36-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-38-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-35-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-34-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-67-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4824-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-72-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4824-40-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-71-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4824-70-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4824-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-82-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/4824-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4824-104-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download