1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672

General

Target

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Size

33KB
MD5

4c9cef23f592a028cee6534b90801b6b
SHA1

509b191b8f762bdc247096c120d09e79fae96e83
SHA256

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672
SHA512

d548b5d9aa95cdb3a1e7f732950e80e81f23b0bc79ee7103d0e46e903d860dedf8d6c660c3d8ff6b5af3f0e51a19235c2f9fbff34017c8a42dfba28f206697f4
SSDEEP

384:I1rO/m6JuAa26QtdZmsmfU/eAri+DngqDUbhCD2SlAI9LiNvLp+Cw:xJu/MZmFArKqPD2S64LIlT

Score

10^/10

evasion trojan upx

Malware Config

Signatures

UAC bypass 3 TTPs 6 IoCs

evasion trojan

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

Downloads MZ/PE file
Executes dropped EXE 4 IoCs

Processes:

k4.exek4.exek4.exek4.exe

pid process

956 k4.exe
580 k4.exe
956 k4.exe
580 k4.exe

pid	process
956	k4.exe
580	k4.exe
956	k4.exe
580	k4.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral1/memory/1980-55-0x0000000000400000-0x0000000000418000-memory.dmp	upx
behavioral1/memory/1980-55-0x0000000000400000-0x0000000000418000-memory.dmp	upx

Loads dropped DLL 2 IoCs

Processes:

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

pid	process
1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

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

System Information Discovery
T1082
Kills process with taskkill 2 IoCs
evasion

Processes:

taskkill.exetaskkill.exe

pid process

1164 taskkill.exe
1164 taskkill.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

k4.exek4.exe

description pid process

Token: SeLoadDriverPrivilege 580 k4.exe
Token: SeLoadDriverPrivilege 580 k4.exe

pid	process
1164	taskkill.exe
1164	taskkill.exe

description	pid	process
Token: SeLoadDriverPrivilege	580	k4.exe
Token: SeLoadDriverPrivilege	580	k4.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

pid	process
1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

Suspicious use of WriteProcessMemory 32 IoCs

Processes:

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.execmd.exe1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.execmd.exe

description	pid	process	target process
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 956	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 580	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	k4.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 1980 wrote to memory of 916	1980	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe	cmd.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe
PID 916 wrote to memory of 1164	916	cmd.exe	taskkill.exe

System policy modification 1 TTPs 6 IoCs

evasion

Modify Registry

T1112

Processes:

1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe

C:\Users\Admin\AppData\Local\Temp\1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
"C:\Users\Admin\AppData\Local\Temp\1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.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:956

C:\Users\Public\Documents\k4.exe
C:/Users/Public/Documents/k4.exe /D
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:580

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c taskkill /f /t /im k4.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:916

C:\Windows\SysWOW64\taskkill.exe
taskkill /f /t /im k4.exe
3⤵
- Kills process with taskkill
PID:1164

C:\Users\Admin\AppData\Local\Temp\1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.exe
"C:\Users\Admin\AppData\Local\Temp\1c7f436f831d5f4b12ed0e74e60d1535ec802d9812a6121a3d56ec0897f9f672.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:956

C:\Users\Public\Documents\k4.exe
C:/Users/Public/Documents/k4.exe /D
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:580

C:\Windows\SysWOW64\cmd.exe
cmd.exe /c taskkill /f /t /im k4.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:916

C:\Windows\SysWOW64\taskkill.exe
taskkill /f /t /im k4.exe
3⤵
- Kills process with taskkill
PID:1164

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

1

T1089

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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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\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/580-61-0x0000000000000000-mapping.dmp

Download
memory/580-61-0x0000000000000000-mapping.dmp

Download
memory/916-64-0x0000000000000000-mapping.dmp

Download
memory/916-64-0x0000000000000000-mapping.dmp

Download
memory/956-59-0x000007FEFB831000-0x000007FEFB833000-memory.dmp

Filesize
8KB

Download
memory/956-57-0x0000000000000000-mapping.dmp

Download
memory/956-59-0x000007FEFB831000-0x000007FEFB833000-memory.dmp

Filesize
8KB

Download
memory/956-57-0x0000000000000000-mapping.dmp

Download
memory/1164-65-0x0000000000000000-mapping.dmp

Download
memory/1164-65-0x0000000000000000-mapping.dmp

Download
memory/1980-55-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1980-54-0x0000000076031000-0x0000000076033000-memory.dmp

Filesize
8KB

Download
memory/1980-54-0x0000000076031000-0x0000000076033000-memory.dmp

Filesize
8KB

Download
memory/1980-55-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads