Resubmissions
10/03/2023, 22:01
230310-1xerdshc7x714/02/2023, 16:10
230214-tmg1faee72731/01/2023, 07:47
230131-jmw49afe541026/12/2022, 21:03
221226-zv36jaha4x1024/12/2022, 19:27
221224-x6gessdf7z1013/12/2022, 03:51
221213-eenexsgc4v1012/12/2022, 11:33
221212-npbnjsbc281006/12/2022, 06:29
221206-g8658sca54805/12/2022, 06:17
221205-g19ldsgh7x10General
- Target RustExternal_nls.exe
- Size 658KB
- Sample221212-npbnjsbc28
- SHA256 c6dda31fa6cb4ce140f62c9ce604672fa4a9ba5d1792f2d77f3cfcb43b3227ac
- MD5 1ab8dbca5e2bba39723f00907d266de7
- SHA1 729cb808637568f20ac886b3fac5f3cf5ff01dee
- SHA512 d1a31848eb9b683793afd36031ef8078ff962c2526272782cf2fca8db11afb71643a46b9ad6bce3ba8dba1b638672205726f6e96c7dd3e887228a2368ec08081
- SSDEEP 12288:3oSO5i2eVUIvybKcEz4MM7S9HdKINesX7j6p9PI8GS0oN2:3ouTVUIvtH4H7aLeO23gRoY
- MD5 SHA1 SHA512 SSDEEP
Static task
static1
Behavioral task
behavioral1
Sample
RustExternal_nls.exe
Resource
win7-20221111-en
7 signatures
150 seconds
Behavioral task
behavioral2
Sample
RustExternal_nls.exe
Resource
win10v2004-20220901-en
17 signatures
150 seconds
Malware Config
Extracted
Family
-
asyncrat
Version
-
0.5.7B
Botnet
-
System Guard Runtime
C2
-
85.105.88.221:2531
Mutex
-
System Guard Runtime
Attributes
-
delay
3
-
install
false
-
install_file
System Guard Runtime
-
install_folder
%AppData%
aes.plain
Extracted
Family
-
asyncrat
Version
-
0.5.7B
Botnet
-
DefenderSmartScren
C2
-
217.64.31.3:8437
Mutex
-
DefenderSmartScren
Attributes
-
delay
3
-
install
false
-
install_file
SecurityHealtheurvice.exe
-
install_folder
%AppData%
aes.plain
Targets
-
- Target RustExternal_nls.exe
- Size 658KB
- SHA256 c6dda31fa6cb4ce140f62c9ce604672fa4a9ba5d1792f2d77f3cfcb43b3227ac
- MD5 1ab8dbca5e2bba39723f00907d266de7
- SHA1 729cb808637568f20ac886b3fac5f3cf5ff01dee
- SHA512 d1a31848eb9b683793afd36031ef8078ff962c2526272782cf2fca8db11afb71643a46b9ad6bce3ba8dba1b638672205726f6e96c7dd3e887228a2368ec08081
- SSDEEP 12288:3oSO5i2eVUIvybKcEz4MM7S9HdKINesX7j6p9PI8GS0oN2:3ouTVUIvtH4H7aLeO23gRoY
- MD5 SHA1 SHA512 SSDEEP
-
Async RAT payload
-
Blocklisted process makes network request
-
Downloads MZ/PE file
-
Executes dropped EXE
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Loads dropped DLL
-
Adds Run key to start application
-
Suspicious use of SetThreadContext