e26d98ab1e3a5bb2b637dedd02182856e6320e26df0beadc155f986be838c16b

Analysis

max time kernel
11s
max time network
140s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
27-09-2022 11:29

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General

Target

9.27USDT·ַʵ.exe
Size

36KB
MD5

f03f5610257f8dd2968b516d74621b78
SHA1

3da92c0ccbe7a331e1dfa7b870f2ad945aaa2045
SHA256

fec33611d9bc68875811e7bbac111b2682512e16e4ca6ae0b2db774623978cf2
SHA512

fed52e5ad9388fbf4c813801bce31f1f9adf39572ec970871d36b92836e27a62329af3b277e58c815a19460bbfaef3c4f45cb70d6aefe798c660cdc803ef142b
SSDEEP

192:600maRBUda7n9JlU2g1jJMOEyKbIYymt5XTtEyKihoynKwHLHTgH9N2tpgRmd8MS:609Bdq9JGqO+NxhjAdN2tpgwd5ASc

Score

10^/10

evasion trojan

Malware Config

Signatures

UAC bypass 3 TTPs 6 IoCs

evasion trojan

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

9.27USDT·ַʵ.exe9.27USDT·ַʵ.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	9.27USDT·ַʵ.exe

Downloads MZ/PE file
Executes dropped EXE 4 IoCs

Processes:

k4.exek4.exek4.exek4.exe

pid process

1468 k4.exe
1484 k4.exe
1468 k4.exe
1484 k4.exe

pid	process
1468	k4.exe
1484	k4.exe
1468	k4.exe
1484	k4.exe

Loads dropped DLL 4 IoCs

Processes:

9.27USDT·ַʵ.exe9.27USDT·ַʵ.exe

pid	process
1980	9.27USDT·ַʵ.exe
1980	9.27USDT·ַʵ.exe
1980	9.27USDT·ַʵ.exe
1980	9.27USDT·ַʵ.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

9.27USDT·ַʵ.exe9.27USDT·ַʵ.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9.27USDT·ַʵ.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

k4.exek4.exe

description pid process

Token: SeLoadDriverPrivilege 1484 k4.exe
Token: SeLoadDriverPrivilege 1484 k4.exe

description	pid	process
Token: SeLoadDriverPrivilege	1484	k4.exe
Token: SeLoadDriverPrivilege	1484	k4.exe

Suspicious use of SetWindowsHookEx 4 IoCs

Processes:

9.27USDT·ַʵ.exe9.27USDT·ַʵ.exe

pid	process
1980	9.27USDT·ַʵ.exe
1980	9.27USDT·ַʵ.exe
1980	9.27USDT·ַʵ.exe
1980	9.27USDT·ַʵ.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

9.27USDT·ַʵ.exe9.27USDT·ַʵ.exe

description	pid	process	target process
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1468	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe
PID 1980 wrote to memory of 1484	1980	9.27USDT·ַʵ.exe	k4.exe

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

T1112

Processes:

9.27USDT·ַʵ.exe9.27USDT·ַʵ.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	9.27USDT·ַʵ.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	9.27USDT·ַʵ.exe

C:\Users\Admin\AppData\Local\Temp\9.27USDT·ַʵ.exe
"C:\Users\Admin\AppData\Local\Temp\9.27USDT·ַʵ.exe"
1⤵
- UAC bypass
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1980

C:\Users\Public\Documents\k4.exe
C:/Users/Public/Documents/k4.exe
2⤵
- Executes dropped EXE
PID:1468

C:\Users\Public\Documents\k4.exe
C:/Users/Public/Documents/k4.exe /D
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1484

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c taskkill /f /t /im k4.exe
2⤵
PID:1036

C:\Users\Admin\AppData\Local\Temp\9.27USDT·ַʵ.exe
"C:\Users\Admin\AppData\Local\Temp\9.27USDT·ַʵ.exe"
1⤵
- UAC bypass
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1980

C:\Users\Public\Documents\k4.exe
C:/Users/Public/Documents/k4.exe
2⤵
- Executes dropped EXE
PID:1468

C:\Users\Public\Documents\k4.exe
C:/Users/Public/Documents/k4.exe /D
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:1484

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c taskkill /f /t /im k4.exe
2⤵
PID:1036

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
C:\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
C:\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
C:\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
C:\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
C:\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
\Users\Public\Documents\RDSv1.dll
Filesize
24KB

MD5
c68a7ddbed2cd20279b87e733c9008db

SHA1
eef926d0069c9b54e609302b64267d4721f8ea7a

SHA256
7e05127f15bb1967ca4598d9fa8a4c7867b1658b684e50874a9513e4ff23ee53

SHA512
db21961744b62f0a772c7bd309592898630deeb1a18e79c3b289e5d187521cfdcc37e4a6a18149a697ddff7c121ec6f73685a8dce8e1181552558947d13e83bf

Download Submit
\Users\Public\Documents\RDSv1.dll
Filesize
24KB

MD5
c68a7ddbed2cd20279b87e733c9008db

SHA1
eef926d0069c9b54e609302b64267d4721f8ea7a

SHA256
7e05127f15bb1967ca4598d9fa8a4c7867b1658b684e50874a9513e4ff23ee53

SHA512
db21961744b62f0a772c7bd309592898630deeb1a18e79c3b289e5d187521cfdcc37e4a6a18149a697ddff7c121ec6f73685a8dce8e1181552558947d13e83bf

Download Submit
\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
\Users\Public\Documents\k4.exe
Filesize
892KB

MD5
33e29221e2825001d32f78632217d250

SHA1
9122127fc91790a1edb78003e9b58a9b00355ed5

SHA256
65d0b20a4dc4911fbb91683eb6488d3d3493fa4584bbdfb4e942f203bef0030d

SHA512
01d5c6ded3a83d81371e94fefb1debabb1d003c86ab3cf7145d28fb15fcfd4f8b763f6711f99c5afd9bf90f02a7af993efa5945d4f8bb6a3649b5fd86414ae93

Download Submit
memory/1468-59-0x000007FEFC2C1000-0x000007FEFC2C3000-memory.dmp

Filesize
8KB

Download
memory/1468-57-0x0000000000000000-mapping.dmp

Download
memory/1468-59-0x000007FEFC2C1000-0x000007FEFC2C3000-memory.dmp

Filesize
8KB

Download
memory/1468-57-0x0000000000000000-mapping.dmp

Download
memory/1484-61-0x0000000000000000-mapping.dmp

Download
memory/1484-61-0x0000000000000000-mapping.dmp

Download
memory/1980-54-0x00000000756B1000-0x00000000756B3000-memory.dmp

Filesize
8KB

Download
memory/1980-54-0x00000000756B1000-0x00000000756B3000-memory.dmp

Filesize
8KB

Download