f9d9d00a974b259b747217d021d95c7902c8a8807539db0bbf43939be972e281

Analysis

max time kernel
146s
max time network
159s
platform
windows10_x64
resource
win10v20210408
submitted
16-07-2021 17:35

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General

Target

037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe

Score

8^/10

persistence upx

Malware Config

Signatures

UPX packed file 1 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/3384-115-0x0000000013140000-0x0000000013CEB000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\mjykxsaprxubdyztvlkg = "C:\\Users\\Admin\\AppData\\Roaming\\mjykxsaprxubdyztvlkg\\mjykxsaprxubdyztvlkg.exe"	iexplore.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe

description	pid	process	target process
PID 3492 set thread context of 3384	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 set thread context of 204	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 set thread context of 1364	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 set thread context of 3760	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.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 2 IoCs

Processes:

iexplore.exe

pid process

3384 iexplore.exe
3384 iexplore.exe

pid	process
3384	iexplore.exe
3384	iexplore.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe

description	pid	process	target process
PID 3492 wrote to memory of 3384	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3384	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3384	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3384	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3384	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 204	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 204	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 204	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 204	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 204	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 1364	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 1364	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 1364	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 1364	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 1364	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3760	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3760	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3760	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3760	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe
PID 3492 wrote to memory of 3760	3492	037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe	iexplore.exe

C:\Users\Admin\AppData\Local\Temp\037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe
"C:\Users\Admin\AppData\Local\Temp\037ff659cb188100251c228a1babe2cd3bc3aaa43e0039555e12c232a8b9f38f.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3492

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
PID:3384

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
2⤵
- Adds Run key to start application
PID:204

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
2⤵
PID:1364

C:\Program Files (x86)\Internet Explorer\iexplore.exe
"C:\Program Files (x86)\Internet Explorer\iexplore.exe"
2⤵
PID:3760

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

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

memory/204-118-0x0000000013C8F890-mapping.dmp

Download
memory/1364-120-0x0000000013C8F890-mapping.dmp

Download
memory/3384-115-0x0000000013140000-0x0000000013CEB000-memory.dmp

Filesize
11.7MB

Download
memory/3384-116-0x0000000013C8F890-mapping.dmp

Download
memory/3492-114-0x0000000000630000-0x0000000000631000-memory.dmp

Filesize
4KB

Download
memory/3760-122-0x0000000013C8F890-mapping.dmp

Download