Analysis
-
max time kernel
149s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
14/03/2024, 17:20
Static task
static1
Behavioral task
behavioral1
Sample
0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe
Resource
win10v2004-20240226-en
General
-
Target
0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe
-
Size
3.1MB
-
MD5
c1c31b17d6e0308357a0769ad7e3baf2
-
SHA1
dcbf8e23e5ab27f5f8f2c94591aff7d1ec521066
-
SHA256
0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920
-
SHA512
d69079f8b7728b72e7815c4445e53109f5a1a4af457ea27fd57dba280762c9bbd3987379ab16505beca45eb8bd5434a2bb7c165d5e93ef2b65163b7b4a71d171
-
SSDEEP
98304:tHpPDOLrWUJIIrwRbK8X6lLB0L8SLbAEbFrh23K7P:tJPaLSUrYKu6liNskC6j
Malware Config
Extracted
quasar
1.4.1
Remote Client
pentestpenguin-56392.portmap.host:56392
306c98fa-c4cf-4571-bb65-8a72448e6e31
-
encryption_key
6C5CE66574BEE45DBBB983F92C7715A2F771327F
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
-
Quasar payload 1 IoCs
resource yara_rule behavioral2/memory/4120-11-0x0000000000400000-0x0000000000724000-memory.dmp family_quasar -
Detects .NET executables utilizing NyanX-CAT C# Loader 1 IoCs
resource yara_rule behavioral2/memory/3128-1-0x00000000007D0000-0x0000000000AF8000-memory.dmp INDICATOR_EXE_Packed_NyanXCat_CSharpLoader -
Detects Windows executables referencing non-Windows User-Agents 1 IoCs
resource yara_rule behavioral2/memory/4120-11-0x0000000000400000-0x0000000000724000-memory.dmp INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA -
Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
resource yara_rule behavioral2/memory/4120-11-0x0000000000400000-0x0000000000724000-memory.dmp INDICATOR_SUSPICIOUS_Binary_References_Browsers -
Detects executables containing common artifacts observed in infostealers 1 IoCs
resource yara_rule behavioral2/memory/4120-11-0x0000000000400000-0x0000000000724000-memory.dmp INDICATOR_SUSPICIOUS_GENInfoStealer -
Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 3128 set thread context of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe Token: SeDebugPrivilege 4120 RegAsm.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
pid Process 4120 RegAsm.exe -
Suspicious use of SendNotifyMessage 1 IoCs
pid Process 4120 RegAsm.exe -
Suspicious use of WriteProcessMemory 11 IoCs
description pid Process procid_target PID 3128 wrote to memory of 3928 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 100 PID 3128 wrote to memory of 3928 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 100 PID 3128 wrote to memory of 3928 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 100 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101 PID 3128 wrote to memory of 4120 3128 0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe 101
Processes
-
C:\Users\Admin\AppData\Local\Temp\0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe"C:\Users\Admin\AppData\Local\Temp\0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3128 -
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵PID:3928
-
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4120
-