Analysis
- max time kernel
95s - max time network
99s - platform
windows7_x64 - resource
win7-20220812-en - resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system - submitted
05/10/2022, 11:04
Static task
static1
Behavioral task
behavioral1
Sample
a6c3eaa47e2d0922063f85495282b1e3.exe
Resource
win7-20220812-en
18 signatures
150 seconds
Behavioral task
behavioral2
Sample
a6c3eaa47e2d0922063f85495282b1e3.exe
Resource
win10v2004-20220901-en
18 signatures
150 seconds
General
- Target a6c3eaa47e2d0922063f85495282b1e3.exe
- Size 380KB
- Sample221005-m591lsedan
- SHA256 30e2e162c2da2940451688e73c7797bde2d9ee6806df5d68ebefa35812423d40
- MD5 a6c3eaa47e2d0922063f85495282b1e3
- SHA1 5fa0211414a8b535c4db767cb2f417264b0d3628
- SHA512 30c35fc4c95b6c9bb60ef7f4d00ed72d49c0601dc63d63db35cff1ecbc293e731ffd2f54d37c63e5aff26b898fe9cd01b81259e5b8574d7151e65466f22f7f5a
- SSDEEP 6144:2qaFH+9LrEb6qlZokYZvVaxh7kY4TNryt5x+NAPskxrlIsNq1kCPIsQlw3OeAK6U:25IQrvY4LvxgAPskYb1XIDlw+zK6U
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
description ioc Process File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe a6c3eaa47e2d0922063f85495282b1e3.exe File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe a6c3eaa47e2d0922063f85495282b1e3.exe - Loads dropped DLL 1 IoCs
pid Process 1424 a6c3eaa47e2d0922063f85495282b1e3.exe - Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook a6c3eaa47e2d0922063f85495282b1e3.exe Key opened \REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook a6c3eaa47e2d0922063f85495282b1e3.exe Key opened \REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook a6c3eaa47e2d0922063f85495282b1e3.exe - Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
pid Process 1252 a6c3eaa47e2d0922063f85495282b1e3.exe 1252 a6c3eaa47e2d0922063f85495282b1e3.exe - Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
pid Process 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 1252 a6c3eaa47e2d0922063f85495282b1e3.exe - Suspicious use of SetThreadContext 1 IoCs
description pid Process procid_target PID 1424 set thread context of 1252 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 26 - Drops file in Program Files directory 1 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Common Files\Cydon.Pre a6c3eaa47e2d0922063f85495282b1e3.exe - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Suspicious behavior: MapViewOfSection 1 IoCs
pid Process 1424 a6c3eaa47e2d0922063f85495282b1e3.exe - Suspicious behavior: RenamesItself 1 IoCs
pid Process 1252 a6c3eaa47e2d0922063f85495282b1e3.exe - Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1252 a6c3eaa47e2d0922063f85495282b1e3.exe - Suspicious use of WriteProcessMemory 5 IoCs
description pid Process procid_target PID 1424 wrote to memory of 1252 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 26 PID 1424 wrote to memory of 1252 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 26 PID 1424 wrote to memory of 1252 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 26 PID 1424 wrote to memory of 1252 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 26 PID 1424 wrote to memory of 1252 1424 a6c3eaa47e2d0922063f85495282b1e3.exe 26 - outlook_office_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook a6c3eaa47e2d0922063f85495282b1e3.exe - outlook_win_path 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook a6c3eaa47e2d0922063f85495282b1e3.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\a6c3eaa47e2d0922063f85495282b1e3.exe"C:\Users\Admin\AppData\Local\Temp\a6c3eaa47e2d0922063f85495282b1e3.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1424 -
C:\Users\Admin\AppData\Local\Temp\a6c3eaa47e2d0922063f85495282b1e3.exe"C:\Users\Admin\AppData\Local\Temp\a6c3eaa47e2d0922063f85495282b1e3.exe"2⤵
- Checks QEMU agent file
- Accesses Microsoft Outlook profiles
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1252
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
- Path \Users\Admin\AppData\Local\Temp\nsj5A14.tmp\System.dll
- Size 11KB
- SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
- MD5 ee260c45e97b62a5e42f17460d406068
- SHA1 df35f6300a03c4d3d3bd69752574426296b78695
- SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3
- SSDEEP 192:eF24sihno00Wfl97nH6T2enXwWobpWBTU4VtHT7dmN35Ol9Sl:h8QIl975eXqlWBrz7YLOl9
- MD5 SHA1 SHA512 SSDEEP