18507cd6bf6a5c16c6d779ff0b04c6308bb5e6d0f28114bfd4d7b387345aab1d

General

Target

virussign.exe
Size

2.4MB
MD5

10d19f611c27e35e9d2333f992e7b140
SHA1

520a9aad58df9da7889012d36537f3acb35ac1cc
SHA256

18507cd6bf6a5c16c6d779ff0b04c6308bb5e6d0f28114bfd4d7b387345aab1d
SHA512

c7f52a92540048ceb31d4fa96fc7e679c610eb9ad51a6835c71135c54f660ac543df68739cac53950a7724ae76138f50e3e261c4ad81447c6ed5ec31f79ae047

Score

8^/10

upx

Malware Config

Signatures

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1172-56-0x0000000000840000-0x0000000000FE9000-memory.dmp	upx
behavioral1/memory/1172-57-0x0000000000840000-0x0000000000FE9000-memory.dmp	upx

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

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 5 IoCs

adware spyware

Modify Registry

T1112

Processes:

virussign.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	virussign.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main	virussign.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FeatureControl	virussign.exe
Key created	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION	virussign.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION\virussign.exe = "11001"	virussign.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

virussign.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	virussign.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	virussign.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

Processes:

virussign.exe

pid	process
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe
1172	virussign.exe

Suspicious use of AdjustPrivilegeToken 14 IoCs

Processes:

virussign.exe

description	pid	process
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe
Token: SeIncreaseQuotaPrivilege	1172	virussign.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

virussign.exe

pid process

1172 virussign.exe
1172 virussign.exe

C:\Users\Admin\AppData\Local\Temp\virussign.exe
"C:\Users\Admin\AppData\Local\Temp\virussign.exe"
1⤵
- Modifies Internet Explorer settings
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1172

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Install Root Certificate

1

T1130

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/1172-54-0x00000000755A1000-0x00000000755A3000-memory.dmp

Filesize
8KB

Download
memory/1172-55-0x00000000741D1000-0x00000000741D3000-memory.dmp

Filesize
8KB

Download
memory/1172-56-0x0000000000840000-0x0000000000FE9000-memory.dmp

Filesize
7.7MB

Download
memory/1172-57-0x0000000000840000-0x0000000000FE9000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads