0264a3c84d3a268983747939a9345ccdd32e2614133e362803cc992e0aaf6897

General

Target

cuentas.exe
Size

703KB
MD5

4257c31396f2298a0ff642464ea2de68
SHA1

cb2ac642f5743533b79fef9bd4e97da0b1c18aef
SHA256

0264a3c84d3a268983747939a9345ccdd32e2614133e362803cc992e0aaf6897
SHA512

daf209fb4abe928c974d2ddef6dd40b2b29a02cf9c6b66b386a0a6b240fafd9a285ceb3eee04466fbe8e59ce1d91856b26a22ea8e71d66343673b9bed5f2933f

Score

8^/10

spyware

Malware Config

Signatures

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

3 checkip.dyndns.org

flow	ioc
3	checkip.dyndns.org

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

cuentas.exe

description	pid	process	target process
PID 1296 wrote to memory of 1128	1296	cuentas.exe	cuentas.exe
PID 1296 wrote to memory of 1128	1296	cuentas.exe	cuentas.exe
PID 1296 wrote to memory of 1128	1296	cuentas.exe	cuentas.exe
PID 1296 wrote to memory of 1128	1296	cuentas.exe	cuentas.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

cuentas.exe

pid process

1296 cuentas.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

cuentas.exe

description pid process target process

PID 1296 set thread context of 1128 1296 cuentas.exe cuentas.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

cuentas.exe

description pid process

Token: SeDebugPrivilege 1128 cuentas.exe

pid	process
1296	cuentas.exe

description	pid	process	target process
PID 1296 set thread context of 1128	1296	cuentas.exe	cuentas.exe

description	pid	process
Token: SeDebugPrivilege	1128	cuentas.exe

UPX packed file 3 IoCs

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

Processes:

resource	yara_rule
behavioral1/memory/1128-0-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral1/memory/1128-2-0x0000000000400000-0x0000000000450000-memory.dmp	upx
behavioral1/memory/1128-3-0x0000000000400000-0x0000000000450000-memory.dmp	upx

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

cuentas.execuentas.exe

pid process

1296 cuentas.exe
1128 cuentas.exe
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware

Data from Local System
T1005

Credentials in Files
T1081

pid	process
1296	cuentas.exe
1128	cuentas.exe

C:\Users\Admin\AppData\Local\Temp\cuentas.exe
"C:\Users\Admin\AppData\Local\Temp\cuentas.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
PID:1296

C:\Users\Admin\AppData\Local\Temp\cuentas.exe
"C:\Users\Admin\AppData\Local\Temp\cuentas.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious behavior: EnumeratesProcesses
PID:1128

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

3

T1081

Discovery

Lateral Movement

Collection

Data from Local System

3

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1128-0-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1128-1-0x000000000044E440-mapping.dmp

Download
memory/1128-2-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1128-3-0x0000000000400000-0x0000000000450000-memory.dmp

Filesize
320KB

Download
memory/1128-4-0x0000000000270000-0x0000000000292000-memory.dmp

Filesize
136KB

Download
memory/1128-5-0x0000000001F52000-0x0000000001F53000-memory.dmp

Filesize
4KB

Download
memory/1128-6-0x0000000000220000-0x000000000023C000-memory.dmp

Filesize
112KB

Download

Analysis

Sharing