snakekeylogger | 26a2b448dc82400ef64b88557b9443731bf994f0539ccb147b14a9a89c0283d1

Analysis

max time kernel
151s
max time network
136s
platform
windows7_x64
resource
win7v20201028
submitted
18-01-2021 07:16

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General

Target

IMG_13791.doc
Size

623KB
MD5

f07ba9823647515d52c35fdc53936c2e
SHA1

2072b8921e48ffc0cfe1560e989cf63957b4343a
SHA256

26a2b448dc82400ef64b88557b9443731bf994f0539ccb147b14a9a89c0283d1
SHA512

87d3007aace763d6181b5c098fac1f28e58f6dfa74fb8375c08f190c129b2abb46068dabb115834e0287cbf8600fd08a05e4a9be47ba9248edf66456e4b5478f

Score

10^/10

snakekeylogger keylogger persistence spyware stealer

Malware Config

Signatures

Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger Payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1380-38-0x000000000046251E-mapping.dmp	family_snakekeylogger
behavioral1/memory/1380-40-0x0000000000090000-0x00000000000F8000-memory.dmp	family_snakekeylogger

Blocklisted process makes network request 5 IoCs

Processes:

EQNEDT32.EXE

flow pid process

7 1732 EQNEDT32.EXE
9 1732 EQNEDT32.EXE
10 1732 EQNEDT32.EXE
12 1732 EQNEDT32.EXE
14 1732 EQNEDT32.EXE
Executes dropped EXE 3 IoCs

Processes:

69577.exescis.exeInstallUtil.exe

pid process

1452 69577.exe
1104 scis.exe
1380 InstallUtil.exe
Loads dropped DLL 3 IoCs

Processes:

EQNEDT32.EXE69577.exescis.exe

pid process

1732 EQNEDT32.EXE
1452 69577.exe
1104 scis.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081

flow	pid	process
7	1732	EQNEDT32.EXE
9	1732	EQNEDT32.EXE
10	1732	EQNEDT32.EXE
12	1732	EQNEDT32.EXE
14	1732	EQNEDT32.EXE

pid	process
1452	69577.exe
1104	scis.exe
1380	InstallUtil.exe

pid	process
1732	EQNEDT32.EXE
1452	69577.exe
1104	scis.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\not = "C:\\Users\\Admin\\scis.exe"	reg.exe

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

15 checkip.dyndns.org
18 freegeoip.app
19 freegeoip.app
Suspicious use of SetThreadContext 1 IoCs

Processes:

scis.exe

description pid process target process

PID 1104 set thread context of 1380 1104 scis.exe InstallUtil.exe
Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description ioc process

File opened for modification C:\Windows\Debug\WIA\wiatrace.log WINWORD.EXE
Office loads VBA resources, possible macro or embedded object present
Launches Equation Editor 1 TTPs 1 IoCs
Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.
exploit

Exploitation for Client Execution
T1203

Processes:

EQNEDT32.EXE

pid process

1732 EQNEDT32.EXE

flow	ioc
15	checkip.dyndns.org
18	freegeoip.app
19	freegeoip.app

description	pid	process	target process
PID 1104 set thread context of 1380	1104	scis.exe	InstallUtil.exe

description	ioc	process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.EXE

pid	process
1732	EQNEDT32.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

WINWORD.EXE

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	WINWORD.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	WINWORD.EXE
Key created	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	WINWORD.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	WINWORD.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid process

1964 WINWORD.EXE
Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

69577.exescis.exeInstallUtil.exe

pid process

1452 69577.exe
1452 69577.exe
1452 69577.exe
1452 69577.exe
1452 69577.exe
1104 scis.exe
1104 scis.exe
1380 InstallUtil.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

69577.exescis.exeInstallUtil.exe

description pid process

Token: SeDebugPrivilege 1452 69577.exe
Token: SeDebugPrivilege 1104 scis.exe
Token: SeDebugPrivilege 1380 InstallUtil.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid process

1964 WINWORD.EXE
1964 WINWORD.EXE

pid	process
1964	WINWORD.EXE

pid	process
1452	69577.exe
1452	69577.exe
1452	69577.exe
1452	69577.exe
1452	69577.exe
1104	scis.exe
1104	scis.exe
1380	InstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	1452	69577.exe
Token: SeDebugPrivilege	1104	scis.exe
Token: SeDebugPrivilege	1380	InstallUtil.exe

pid	process
1964	WINWORD.EXE
1964	WINWORD.EXE

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

WINWORD.EXEEQNEDT32.EXE69577.execmd.exescis.exe

description	pid	process	target process
PID 1964 wrote to memory of 1952	1964	WINWORD.EXE	splwow64.exe
PID 1964 wrote to memory of 1952	1964	WINWORD.EXE	splwow64.exe
PID 1964 wrote to memory of 1952	1964	WINWORD.EXE	splwow64.exe
PID 1964 wrote to memory of 1952	1964	WINWORD.EXE	splwow64.exe
PID 1732 wrote to memory of 1452	1732	EQNEDT32.EXE	69577.exe
PID 1732 wrote to memory of 1452	1732	EQNEDT32.EXE	69577.exe
PID 1732 wrote to memory of 1452	1732	EQNEDT32.EXE	69577.exe
PID 1732 wrote to memory of 1452	1732	EQNEDT32.EXE	69577.exe
PID 1452 wrote to memory of 1840	1452	69577.exe	cmd.exe
PID 1452 wrote to memory of 1840	1452	69577.exe	cmd.exe
PID 1452 wrote to memory of 1840	1452	69577.exe	cmd.exe
PID 1452 wrote to memory of 1840	1452	69577.exe	cmd.exe
PID 1840 wrote to memory of 1820	1840	cmd.exe	reg.exe
PID 1840 wrote to memory of 1820	1840	cmd.exe	reg.exe
PID 1840 wrote to memory of 1820	1840	cmd.exe	reg.exe
PID 1840 wrote to memory of 1820	1840	cmd.exe	reg.exe
PID 1452 wrote to memory of 1104	1452	69577.exe	scis.exe
PID 1452 wrote to memory of 1104	1452	69577.exe	scis.exe
PID 1452 wrote to memory of 1104	1452	69577.exe	scis.exe
PID 1452 wrote to memory of 1104	1452	69577.exe	scis.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe
PID 1104 wrote to memory of 1380	1104	scis.exe	InstallUtil.exe

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\IMG_13791.doc"
1⤵
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1964

C:\Windows\splwow64.exe
C:\Windows\splwow64.exe 12288
2⤵
PID:1952

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:1732

C:\Users\Public\69577.exe
"C:\Users\Public\69577.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1452

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "not" /t REG_SZ /d "C:\Users\Admin\scis.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:1840

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "not" /t REG_SZ /d "C:\Users\Admin\scis.exe"
4⤵
- Adds Run key to start application
PID:1820

C:\Users\Admin\scis.exe
"C:\Users\Admin\scis.exe"
3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1104

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
"C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1380

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Exploitation for Client Execution

T1203

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials in Files

T1081

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\V84I7BUN.txt
MD5
826f9a380c5041676822fc65de52466e

SHA1
9f87407fced2b39124d049519d44587c2c4f869c

SHA256
995f5115bdddb8879510dad9fc20d70f31d66535638957617ffb26675b5c1dda

SHA512
1da239475c794ee7c24747cee20249c2e7b7264bd253554248b0202771fb3b5349302965b9c34843bf814d4f40fe0327989f38a87430bc410e1bb655ae44827a

Download Submit
C:\Users\Admin\scis.exe
MD5
52254e42523afbd28c7377c6b7f82cc0

SHA1
bc9fdf2d59e3b3c54c4dc1cdea9c5954ceebc32e

SHA256
db0b892ea1b776ac1324cdb701d9d5fe49e4817259e93cedf8249ed3f9983664

SHA512
0a88462bdefb64e98e93737580a0a0ad212c2e3e0fe6ed9448b67271ece6edf379bc3404d4f622016fe3b0779c39dc4600340a2693d78313421efcf47db5398c

Download Submit
C:\Users\Admin\scis.exe
MD5
52254e42523afbd28c7377c6b7f82cc0

SHA1
bc9fdf2d59e3b3c54c4dc1cdea9c5954ceebc32e

SHA256
db0b892ea1b776ac1324cdb701d9d5fe49e4817259e93cedf8249ed3f9983664

SHA512
0a88462bdefb64e98e93737580a0a0ad212c2e3e0fe6ed9448b67271ece6edf379bc3404d4f622016fe3b0779c39dc4600340a2693d78313421efcf47db5398c

Download Submit
C:\Users\Public\69577.exe
MD5
52254e42523afbd28c7377c6b7f82cc0

SHA1
bc9fdf2d59e3b3c54c4dc1cdea9c5954ceebc32e

SHA256
db0b892ea1b776ac1324cdb701d9d5fe49e4817259e93cedf8249ed3f9983664

SHA512
0a88462bdefb64e98e93737580a0a0ad212c2e3e0fe6ed9448b67271ece6edf379bc3404d4f622016fe3b0779c39dc4600340a2693d78313421efcf47db5398c

Download Submit
C:\Users\Public\69577.exe
MD5
52254e42523afbd28c7377c6b7f82cc0

SHA1
bc9fdf2d59e3b3c54c4dc1cdea9c5954ceebc32e

SHA256
db0b892ea1b776ac1324cdb701d9d5fe49e4817259e93cedf8249ed3f9983664

SHA512
0a88462bdefb64e98e93737580a0a0ad212c2e3e0fe6ed9448b67271ece6edf379bc3404d4f622016fe3b0779c39dc4600340a2693d78313421efcf47db5398c

Download Submit
\Users\Admin\AppData\Local\Temp\InstallUtil.exe
MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
\Users\Admin\scis.exe
MD5
52254e42523afbd28c7377c6b7f82cc0

SHA1
bc9fdf2d59e3b3c54c4dc1cdea9c5954ceebc32e

SHA256
db0b892ea1b776ac1324cdb701d9d5fe49e4817259e93cedf8249ed3f9983664

SHA512
0a88462bdefb64e98e93737580a0a0ad212c2e3e0fe6ed9448b67271ece6edf379bc3404d4f622016fe3b0779c39dc4600340a2693d78313421efcf47db5398c

Download Submit
\Users\Public\69577.exe
MD5
52254e42523afbd28c7377c6b7f82cc0

SHA1
bc9fdf2d59e3b3c54c4dc1cdea9c5954ceebc32e

SHA256
db0b892ea1b776ac1324cdb701d9d5fe49e4817259e93cedf8249ed3f9983664

SHA512
0a88462bdefb64e98e93737580a0a0ad212c2e3e0fe6ed9448b67271ece6edf379bc3404d4f622016fe3b0779c39dc4600340a2693d78313421efcf47db5398c

Download Submit
memory/328-8-0x000007FEF5E90000-0x000007FEF610A000-memory.dmp

Filesize
2.5MB

Download
memory/1104-33-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download
memory/1104-36-0x0000000004B31000-0x0000000004B32000-memory.dmp

Filesize
4KB

Download
memory/1104-32-0x0000000000580000-0x000000000058B000-memory.dmp

Filesize
44KB

Download
memory/1104-31-0x0000000004B30000-0x0000000004B31000-memory.dmp

Filesize
4KB

Download
memory/1104-27-0x00000000011C0000-0x00000000011C1000-memory.dmp

Filesize
4KB

Download
memory/1104-26-0x000000006ADF0000-0x000000006B4DE000-memory.dmp

Filesize
6.9MB

Download
memory/1104-23-0x0000000000000000-mapping.dmp

Download
memory/1380-40-0x0000000000090000-0x00000000000F8000-memory.dmp

Filesize
416KB

Download
memory/1380-38-0x000000000046251E-mapping.dmp

Download
memory/1380-41-0x000000006ADF0000-0x000000006B4DE000-memory.dmp

Filesize
6.9MB

Download
memory/1380-42-0x0000000000090000-0x0000000000092000-memory.dmp

Filesize
8KB

Download
memory/1380-45-0x0000000000620000-0x0000000000621000-memory.dmp

Filesize
4KB

Download
memory/1452-18-0x0000000004A80000-0x0000000004A81000-memory.dmp

Filesize
4KB

Download
memory/1452-21-0x0000000004A81000-0x0000000004A82000-memory.dmp

Filesize
4KB

Download
memory/1452-17-0x0000000000350000-0x0000000000351000-memory.dmp

Filesize
4KB

Download
memory/1452-16-0x00000000002F0000-0x000000000030E000-memory.dmp

Filesize
120KB

Download
memory/1452-10-0x0000000000000000-mapping.dmp

Download
memory/1452-14-0x00000000010E0000-0x00000000010E1000-memory.dmp

Filesize
4KB

Download
memory/1452-13-0x000000006ADF0000-0x000000006B4DE000-memory.dmp

Filesize
6.9MB

Download
memory/1732-7-0x0000000075ED1000-0x0000000075ED3000-memory.dmp

Filesize
8KB

Download
memory/1820-20-0x0000000000000000-mapping.dmp

Download
memory/1840-19-0x0000000000000000-mapping.dmp

Download
memory/1952-5-0x0000000000000000-mapping.dmp

Download
memory/1952-6-0x000007FEFB831000-0x000007FEFB833000-memory.dmp

Filesize
8KB

Download
memory/1964-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1964-3-0x000000006FDB1000-0x000000006FDB3000-memory.dmp

Filesize
8KB

Download
memory/1964-2-0x0000000072331000-0x0000000072334000-memory.dmp

Filesize
12KB

Download