Analysis
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max time kernel
44s -
max time network
120s -
platform
windows7_x64 -
resource
win7v20201028 -
submitted
19-01-2021 06:41
Static task
static1
Behavioral task
behavioral1
Sample
IMG_53771.pdf.exe
Resource
win7v20201028
Behavioral task
behavioral2
Sample
IMG_53771.pdf.exe
Resource
win10v20201028
General
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Target
IMG_53771.pdf.exe
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Size
1.6MB
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MD5
86b54654ac95dc27eb76c8dce196d3b8
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SHA1
d3f800c5cd196e72365de73c3b0f3b76d0540aef
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SHA256
2109e18f96cf5f627351d52a48eecc483b67e02fd3f1a0e58088f615afc3737f
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SHA512
a17e47307b1fe307138ea0cdb5d084d53b2cd41b08d602fe2a740ea1b77f66624d92ca46fe72fb494a8835caa4a45219b196a434f095c7372732e0821f4a2006
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/1824-12-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger behavioral1/memory/1824-13-0x000000000046370E-mapping.dmp family_snakekeylogger behavioral1/memory/1824-17-0x0000000000400000-0x0000000000468000-memory.dmp family_snakekeylogger -
Executes dropped EXE 1 IoCs
Processes:
InstallUtil.exepid process 1824 InstallUtil.exe -
Loads dropped DLL 1 IoCs
Processes:
IMG_53771.pdf.exepid process 2008 IMG_53771.pdf.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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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 11 freegeoip.app 12 freegeoip.app 6 checkip.dyndns.org -
Suspicious use of SetThreadContext 1 IoCs
Processes:
IMG_53771.pdf.exedescription pid process target process PID 2008 set thread context of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe -
Suspicious behavior: EnumeratesProcesses 9 IoCs
Processes:
IMG_53771.pdf.exeInstallUtil.exepid process 2008 IMG_53771.pdf.exe 2008 IMG_53771.pdf.exe 1824 InstallUtil.exe 1824 InstallUtil.exe 1824 InstallUtil.exe 1824 InstallUtil.exe 1824 InstallUtil.exe 1824 InstallUtil.exe 1824 InstallUtil.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
IMG_53771.pdf.exeInstallUtil.exedescription pid process Token: SeDebugPrivilege 2008 IMG_53771.pdf.exe Token: SeDebugPrivilege 1824 InstallUtil.exe -
Suspicious use of WriteProcessMemory 12 IoCs
Processes:
IMG_53771.pdf.exedescription pid process target process PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe PID 2008 wrote to memory of 1824 2008 IMG_53771.pdf.exe InstallUtil.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\IMG_53771.pdf.exe"C:\Users\Admin\AppData\Local\Temp\IMG_53771.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/1824-12-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1824-19-0x0000000000CB0000-0x0000000000CB1000-memory.dmpFilesize
4KB
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memory/1824-17-0x0000000000400000-0x0000000000468000-memory.dmpFilesize
416KB
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memory/1824-16-0x0000000074BA0000-0x000000007528E000-memory.dmpFilesize
6.9MB
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memory/1824-13-0x000000000046370E-mapping.dmp
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memory/2008-7-0x00000000048A0000-0x00000000048A1000-memory.dmpFilesize
4KB
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memory/2008-11-0x00000000048A1000-0x00000000048A2000-memory.dmpFilesize
4KB
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memory/2008-9-0x0000000000880000-0x0000000000881000-memory.dmpFilesize
4KB
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memory/2008-8-0x00000000004A0000-0x00000000004AB000-memory.dmpFilesize
44KB
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memory/2008-2-0x0000000074BA0000-0x000000007528E000-memory.dmpFilesize
6.9MB
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memory/2008-6-0x00000000003A0000-0x00000000003A1000-memory.dmpFilesize
4KB
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memory/2008-5-0x0000000000470000-0x000000000048E000-memory.dmpFilesize
120KB
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memory/2008-3-0x0000000000890000-0x0000000000891000-memory.dmpFilesize
4KB