Analysis
-
max time kernel
120s -
max time network
145s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
20-01-2021 06:32
Static task
static1
Behavioral task
behavioral1
Sample
IMG_40317.pdf.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
IMG_40317.pdf.exe
Resource
win10v20201028
General
-
Target
IMG_40317.pdf.exe
-
Size
1.4MB
-
MD5
9da79ca571b3427fbd82003b94ee08d2
-
SHA1
3e00a65e6f87ffe3d210e41fe0fef1017be59d9b
-
SHA256
ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04
-
SHA512
033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945
Malware Config
Signatures
-
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
-
Snake Keylogger Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/956-24-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger behavioral1/memory/956-25-0x000000000046240E-mapping.dmp family_snakekeylogger behavioral1/memory/956-28-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger -
Executes dropped EXE 2 IoCs
Processes:
bsys.exeInstallUtil.exepid process 608 bsys.exe 956 InstallUtil.exe -
Drops startup file 1 IoCs
Processes:
IMG_40317.pdf.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\bsys.lnk IMG_40317.pdf.exe -
Loads dropped DLL 2 IoCs
Processes:
IMG_40317.pdf.exebsys.exepid process 1864 IMG_40317.pdf.exe 608 bsys.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
-
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
-
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 11 freegeoip.app 12 freegeoip.app 6 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
bsys.exedescription pid process target process PID 608 set thread context of 956 608 bsys.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 8 IoCs
Processes:
IMG_40317.pdf.exebsys.exeInstallUtil.exepid process 1864 IMG_40317.pdf.exe 1864 IMG_40317.pdf.exe 1864 IMG_40317.pdf.exe 1864 IMG_40317.pdf.exe 1864 IMG_40317.pdf.exe 608 bsys.exe 608 bsys.exe 956 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
Processes:
IMG_40317.pdf.exebsys.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 1864 IMG_40317.pdf.exe Token: SeDebugPrivilege 608 bsys.exe Token: SeDebugPrivilege 956 InstallUtil.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
IMG_40317.pdf.exebsys.exedescription pid process target process PID 1864 wrote to memory of 608 1864 IMG_40317.pdf.exe bsys.exe PID 1864 wrote to memory of 608 1864 IMG_40317.pdf.exe bsys.exe PID 1864 wrote to memory of 608 1864 IMG_40317.pdf.exe bsys.exe PID 1864 wrote to memory of 608 1864 IMG_40317.pdf.exe bsys.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe PID 608 wrote to memory of 956 608 bsys.exe InstallUtil.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\IMG_40317.pdf.exe"C:\Users\Admin\AppData\Local\Temp\IMG_40317.pdf.exe"1⤵
- Drops startup file
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\bsys.exe"C:\Users\Admin\bsys.exe"2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
-
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
-
C:\Users\Admin\bsys.exeMD5
9da79ca571b3427fbd82003b94ee08d2
SHA13e00a65e6f87ffe3d210e41fe0fef1017be59d9b
SHA256ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04
SHA512033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945
-
C:\Users\Admin\bsys.exeMD5
9da79ca571b3427fbd82003b94ee08d2
SHA13e00a65e6f87ffe3d210e41fe0fef1017be59d9b
SHA256ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04
SHA512033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945
-
\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
-
\Users\Admin\bsys.exeMD5
9da79ca571b3427fbd82003b94ee08d2
SHA13e00a65e6f87ffe3d210e41fe0fef1017be59d9b
SHA256ae33318e53652eda0917a4f856ecf0041d8f57b73bf82bc6322921ea16654a04
SHA512033edcb711c8c38de1f0acdbca86d1e624602c4c052773a06bb5145ec80f77a42407b072d2c36454878b6f6e1a026d0ce5cca0e5f7e2688ee2e5c9d3918fb945
-
memory/608-18-0x0000000004D50000-0x0000000004D51000-memory.dmpFilesize
4KB
-
memory/608-19-0x00000000004A0000-0x00000000004AB000-memory.dmpFilesize
44KB
-
memory/608-10-0x0000000000000000-mapping.dmp
-
memory/608-23-0x0000000004D51000-0x0000000004D52000-memory.dmpFilesize
4KB
-
memory/608-13-0x00000000743D0000-0x0000000074ABE000-memory.dmpFilesize
6.9MB
-
memory/608-14-0x0000000000F50000-0x0000000000F51000-memory.dmpFilesize
4KB
-
memory/608-20-0x00000000004B0000-0x00000000004B1000-memory.dmpFilesize
4KB
-
memory/956-25-0x000000000046240E-mapping.dmp
-
memory/956-24-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
-
memory/956-27-0x00000000743D0000-0x0000000074ABE000-memory.dmpFilesize
6.9MB
-
memory/956-28-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
-
memory/956-30-0x0000000004A80000-0x0000000004A81000-memory.dmpFilesize
4KB
-
memory/1864-2-0x00000000743D0000-0x0000000074ABE000-memory.dmpFilesize
6.9MB
-
memory/1864-6-0x0000000000500000-0x0000000000501000-memory.dmpFilesize
4KB
-
memory/1864-5-0x0000000000490000-0x00000000004AE000-memory.dmpFilesize
120KB
-
memory/1864-7-0x0000000004BA0000-0x0000000004BA1000-memory.dmpFilesize
4KB
-
memory/1864-8-0x0000000004BA1000-0x0000000004BA2000-memory.dmpFilesize
4KB
-
memory/1864-3-0x0000000000B20000-0x0000000000B21000-memory.dmpFilesize
4KB