41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6

General

Target

41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
Size

135KB
MD5

0819d577537dc12fbd00cae353e628e0
SHA1

891b6e530bb37cc128b9a48181f2bdd74e568de2
SHA256

41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6
SHA512

d70a0968361bd3ec5fa95e6c3156b772944c9e1ccf415cbf93ee508fc5fe9b0e640977c8a32b11aa07d3d545fd1b5bb54574bb3edd363cd6a0b4b98b9bba09c5
SSDEEP

3072:GPMInrhifUPb1WpXVxAaGBvbNvNbNJkvmhyPQbaDTUXGIDbwKDqCtrwdAxaVTtVC:+JPoIDbByGPMsMP

Score

10^/10

evasion persistence

Malware Config

Signatures

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

Processes:

yusem.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	yusem.exe

Executes dropped EXE 1 IoCs

Processes:

yusem.exe

pid process

688 yusem.exe

Loads dropped DLL 2 IoCs

Processes:

41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe

pid	process
2044	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
2044	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

yusem.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Run\	yusem.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-575491160-2295418218-1540667289-1000\Software\Microsoft\Windows\CurrentVersion\Run\yusem = "C:\\Users\\Admin\\yusem.exe"	yusem.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

yusem.exe

pid	process
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe
688	yusem.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exeyusem.exe

pid process

2044 41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
688 yusem.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exeyusem.exe

description	pid	process	target process
PID 2044 wrote to memory of 688	2044	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe	yusem.exe
PID 2044 wrote to memory of 688	2044	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe	yusem.exe
PID 2044 wrote to memory of 688	2044	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe	yusem.exe
PID 2044 wrote to memory of 688	2044	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe	yusem.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
PID 688 wrote to memory of 2044	688	yusem.exe	41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe

C:\Users\Admin\AppData\Local\Temp\41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe
"C:\Users\Admin\AppData\Local\Temp\41dd6e857ceb556d4b9040f539f08d93fc930c3a40d6ae213725dfc90f27d9f6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2044

C:\Users\Admin\yusem.exe
"C:\Users\Admin\yusem.exe"
2⤵
- Modifies visiblity of hidden/system files in Explorer
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:688

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

1

T1158

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\yusem.exe

Filesize
135KB

MD5
e182897866a60ef82c9a5b9dc66b719b

SHA1
289fd6adb68a86d2ae7ea503e842666f4ed2d9ce

SHA256
70abc22354113acb850306fb1fcb732844e6976053664789e13b14837e348dcd

SHA512
448ddfd5183c4e7d1777fff7cc340f5ee7884f0c91e5301fa4fe4d7a08b7b2919247c0a90e11ca23dd49805346e74a600545bc914172a82786e36023ca4c4e72

Download Submit
C:\Users\Admin\yusem.exe

Filesize
135KB

MD5
e182897866a60ef82c9a5b9dc66b719b

SHA1
289fd6adb68a86d2ae7ea503e842666f4ed2d9ce

SHA256
70abc22354113acb850306fb1fcb732844e6976053664789e13b14837e348dcd

SHA512
448ddfd5183c4e7d1777fff7cc340f5ee7884f0c91e5301fa4fe4d7a08b7b2919247c0a90e11ca23dd49805346e74a600545bc914172a82786e36023ca4c4e72

Download Submit
\Users\Admin\yusem.exe

Filesize
135KB

MD5
e182897866a60ef82c9a5b9dc66b719b

SHA1
289fd6adb68a86d2ae7ea503e842666f4ed2d9ce

SHA256
70abc22354113acb850306fb1fcb732844e6976053664789e13b14837e348dcd

SHA512
448ddfd5183c4e7d1777fff7cc340f5ee7884f0c91e5301fa4fe4d7a08b7b2919247c0a90e11ca23dd49805346e74a600545bc914172a82786e36023ca4c4e72

Download Submit
\Users\Admin\yusem.exe

Filesize
135KB

MD5
e182897866a60ef82c9a5b9dc66b719b

SHA1
289fd6adb68a86d2ae7ea503e842666f4ed2d9ce

SHA256
70abc22354113acb850306fb1fcb732844e6976053664789e13b14837e348dcd

SHA512
448ddfd5183c4e7d1777fff7cc340f5ee7884f0c91e5301fa4fe4d7a08b7b2919247c0a90e11ca23dd49805346e74a600545bc914172a82786e36023ca4c4e72

Download Submit
memory/688-59-0x0000000000000000-mapping.dmp

Download
memory/2044-56-0x0000000076221000-0x0000000076223000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads