61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5

General

Target

61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe
Size

222KB
MD5

aea07e98196f4582a458322f673416ea
SHA1

28f4475dab7a61c9170a41a5dcc193f3e7b4cd49
SHA256

61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5
SHA512

893e6d984438b407f48000e81096a909d7a9562966b0557679a772983b2c07b7b8c3f6639d8b33bbc8de75f5e666cf465a56499acab7fa3f0554cf2655e14d53
SSDEEP

3072:PkYe6Wvtzjm2bYZoHlDJFExx1roCNvpJ32GhNvHTvoYucP0:PkYe6Wvtzjm2bsc141roCTZ2GhNfu

Score

9^/10

evasion persistence

Malware Config

Signatures

.NET Reactor proctector 2 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\exertup.exe	net_reactor
C:\Users\Admin\AppData\Local\Temp\exertup.exe	net_reactor

Executes dropped EXE 1 IoCs

Processes:

exertup.exe

pid process

4192 exertup.exe
Modifies Windows Firewall 1 TTPs 1 IoCs
evasion

Modify Existing Service
T1031

Processes:

netsh.exe

pid process

1540 netsh.exe

pid	process
1540	netsh.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

Processes:

61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe

Drops startup file 2 IoCs

Processes:

exertup.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\0541e9f86982f557b46669d188cd98d3.exe	exertup.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\0541e9f86982f557b46669d188cd98d3.exe	exertup.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

exertup.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\0541e9f86982f557b46669d188cd98d3 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\exertup.exe\" .."	exertup.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\0541e9f86982f557b46669d188cd98d3 = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\exertup.exe\" .."	exertup.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 25 IoCs

Processes:

exertup.exe

pid	process
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe
4192	exertup.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

exertup.exe

description pid process

Token: SeDebugPrivilege 4192 exertup.exe

description	pid	process
Token: SeDebugPrivilege	4192	exertup.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exeexertup.exe

description	pid	process	target process
PID 4900 wrote to memory of 4192	4900	61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe	exertup.exe
PID 4900 wrote to memory of 4192	4900	61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe	exertup.exe
PID 4900 wrote to memory of 4192	4900	61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe	exertup.exe
PID 4192 wrote to memory of 1540	4192	exertup.exe	netsh.exe
PID 4192 wrote to memory of 1540	4192	exertup.exe	netsh.exe
PID 4192 wrote to memory of 1540	4192	exertup.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe
"C:\Users\Admin\AppData\Local\Temp\61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Users\Admin\AppData\Local\Temp\exertup.exe
  "C:\Users\Admin\AppData\Local\Temp\exertup.exe"
  2⤵
  - Executes dropped EXE
  - Drops startup file
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4192
- - C:\Windows\SysWOW64\netsh.exe
    netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\exertup.exe" "exertup.exe" ENABLE
    3⤵
    - Modifies Windows Firewall
    PID:1540

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\exertup.exe

Filesize
222KB

MD5
aea07e98196f4582a458322f673416ea

SHA1
28f4475dab7a61c9170a41a5dcc193f3e7b4cd49

SHA256
61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5

SHA512
893e6d984438b407f48000e81096a909d7a9562966b0557679a772983b2c07b7b8c3f6639d8b33bbc8de75f5e666cf465a56499acab7fa3f0554cf2655e14d53

Download Submit
C:\Users\Admin\AppData\Local\Temp\exertup.exe

Filesize
222KB

MD5
aea07e98196f4582a458322f673416ea

SHA1
28f4475dab7a61c9170a41a5dcc193f3e7b4cd49

SHA256
61677ce68d9c39ff81442ff9aa41a27a7763a06764499a4f1a7ffed361df61d5

SHA512
893e6d984438b407f48000e81096a909d7a9562966b0557679a772983b2c07b7b8c3f6639d8b33bbc8de75f5e666cf465a56499acab7fa3f0554cf2655e14d53

Download Submit
memory/1540-140-0x0000000000000000-mapping.dmp

Download
memory/4192-134-0x0000000000000000-mapping.dmp

Download
memory/4192-138-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/4192-139-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/4900-132-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/4900-133-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/4900-137-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads