d487e9695e8f00c11fbe76975e9dc772ee1b0781ebe27565cb744382a5d368d7

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
28-05-2024 16:26

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General

Target

virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe
Size

83KB
MD5

efae3517dd2317a9b8d8b22f88f9fd10
SHA1

7cdb382f6114c863c83f6a02140a1a1bd149513f
SHA256

d487e9695e8f00c11fbe76975e9dc772ee1b0781ebe27565cb744382a5d368d7
SHA512

a15a6fad6dd8f54aef00d9670f8e55e459c779368ccfa09c873edce698397cc7335ae1b2fcecf26d71541eac1edfab35a56a1e1e913b221951f01cc506907cad
SSDEEP

1536:yr3Z5IfQmv81a7pP1xF3yX2tM/jTEwwwEiiiiJ:WJOfQm01q9X3yX2q/jTQ

Score

8^/10

evasion upx

Malware Config

Signatures

Sets file to hidden 1 TTPs 1 IoCs

Modifies file attributes to stop it showing in Explorer etc.

evasion

Hidden Files and Directories

T1564.001

pid	Process
3696	attrib.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe

Executes dropped EXE 1 IoCs

pid	Process
4000	uyghost.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2292-0-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/files/0x0006000000023308-3.dat	upx
behavioral2/memory/4000-5-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral2/memory/4000-6-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\Debug\uyghost.exe	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe
File opened for modification	C:\Windows\Debug\uyghost.exe	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe
File opened for modification	C:\Windows\Debug\uyghost.exe	attrib.exe

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	uyghost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	uyghost.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeIncBasePriorityPrivilege	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 3696	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe	82
PID 2292 wrote to memory of 3696	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe	82
PID 2292 wrote to memory of 3696	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe	82
PID 2292 wrote to memory of 2992	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe	88
PID 2292 wrote to memory of 2992	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe	88
PID 2292 wrote to memory of 2992	2292	virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe	88

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3696	attrib.exe

C:\Users\Admin\AppData\Local\Temp\virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe
"C:\Users\Admin\AppData\Local\Temp\virussign.com_efae3517dd2317a9b8d8b22f88f9fd10.exe"
1⤵
- Checks computer location settings
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\SysWOW64\attrib.exe
  attrib +a +s +h +r C:\Windows\Debug\uyghost.exe
  2⤵
  - Sets file to hidden
  - Drops file in Windows directory
  - Views/modifies file attributes
  PID:3696
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\VIRUSS~1.EXE > nul
  2⤵
  PID:2992

C:\Windows\Debug\uyghost.exe
C:\Windows\Debug\uyghost.exe
1⤵
- Executes dropped EXE
- Checks processor information in registry
PID:4000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\debug\uyghost.exe

Filesize
83KB

MD5
76ca20229af0c95c2dbca2417ef449cb

SHA1
d6699bb9a3c13ae9a3bead9d66f46f775be56a9a

SHA256
b522761587d6e9aa6e3019f8b5efc6d24a9e08105e4c15cd6d1c3ccbf6553672

SHA512
f6f5df6e4d649c4975e4f7dee1b894204a9ab803a092f50671651d4f30d9db608aef7953159035649dbadb4a0dd842e53b44203ce92ada80302f51a70230f8e6

Download Submit
memory/2292-0-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4000-5-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/4000-6-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads