Analysis
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max time kernel
21s -
max time network
120s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
21-01-2021 05:26
Static task
static1
Behavioral task
behavioral1
Sample
IMG_57880.pdf.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
IMG_57880.pdf.exe
Resource
win10v20201028
General
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Target
IMG_57880.pdf.exe
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Size
1.4MB
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MD5
ff2ca3254245c648cbc0dab62e230948
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SHA1
43f165fd6c8eb008618ada459ea02c87d9f6e33e
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SHA256
b303d3f820da914a39a9a859de14c201515377f31f6631c7e0384dbe44fca53c
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SHA512
378fe5ff61c80c8b9b704b7d061587e1bec1fa76ec07383cc3eeae25d44345da17e88c7350d518b2da262d182f74ba7e07fe4699ff18667bd4e81f3d26f38db2
Malware Config
Signatures
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1688-12-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger behavioral1/memory/1688-13-0x000000000046364E-mapping.dmp family_snakekeylogger behavioral1/memory/1688-17-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger -
Executes dropped EXE 1 IoCs
Processes:
InstallUtil.exepid process 1688 InstallUtil.exe -
Loads dropped DLL 1 IoCs
Processes:
IMG_57880.pdf.exepid process 1632 IMG_57880.pdf.exe -
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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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 5 checkip.dyndns.org 10 freegeoip.app 11 freegeoip.app -
Suspicious use of SetThreadContext 1 IoCs
Processes:
IMG_57880.pdf.exedescription pid process target process PID 1632 set thread context of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
IMG_57880.pdf.exeInstallUtil.exepid process 1632 IMG_57880.pdf.exe 1632 IMG_57880.pdf.exe 1688 InstallUtil.exe 1688 InstallUtil.exe 1688 InstallUtil.exe 1688 InstallUtil.exe 1688 InstallUtil.exe 1688 InstallUtil.exe 1688 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
IMG_57880.pdf.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 1632 IMG_57880.pdf.exe Token: SeDebugPrivilege 1688 InstallUtil.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
IMG_57880.pdf.exedescription pid process target process PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe PID 1632 wrote to memory of 1688 1632 IMG_57880.pdf.exe InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\IMG_57880.pdf.exe"C:\Users\Admin\AppData\Local\Temp\IMG_57880.pdf.exe"1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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C:\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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\Users\Admin\AppData\Local\Temp\InstallUtil.exeMD5
91c9ae9c9a17a9db5e08b120e668c74c
SHA150770954c1ceb0bb6f1d5d3f2de2a0a065773723
SHA256e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f
SHA512ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e
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memory/1632-7-0x0000000004CA0000-0x0000000004CA1000-memory.dmpFilesize
4KB
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memory/1632-2-0x00000000745C0000-0x0000000074CAE000-memory.dmpFilesize
6.9MB
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memory/1632-8-0x00000000006E0000-0x00000000006EB000-memory.dmpFilesize
44KB
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memory/1632-9-0x0000000000AB0000-0x0000000000AB1000-memory.dmpFilesize
4KB
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memory/1632-6-0x00000000002B0000-0x00000000002B1000-memory.dmpFilesize
4KB
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memory/1632-11-0x0000000004CA1000-0x0000000004CA2000-memory.dmpFilesize
4KB
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memory/1632-5-0x0000000000280000-0x000000000029E000-memory.dmpFilesize
120KB
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memory/1632-3-0x0000000000E10000-0x0000000000E11000-memory.dmpFilesize
4KB
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memory/1688-12-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1688-13-0x000000000046364E-mapping.dmp
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memory/1688-16-0x00000000745C0000-0x0000000074CAE000-memory.dmpFilesize
6.9MB
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memory/1688-17-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1688-19-0x0000000004870000-0x0000000004871000-memory.dmpFilesize
4KB