0acd167b4b07ca846877f194af78abcf4528246358947c12dffad914df3df5cd

General

Target

rnr.exe
Size

483KB
MD5

1b747f895701f3ac238a13c789206144
SHA1

a20cffd281aa161ee519da9902ab2a998e013e5e
SHA256

0acd167b4b07ca846877f194af78abcf4528246358947c12dffad914df3df5cd
SHA512

1fd89f37ca4831132776a27275207e241a2c55042fd4b87beb6e629219fbb209448b363741b503a03729a76041dd9a3d79562db1a376f4d73103b6bdfefe6a7e
SSDEEP

6144:kXIktXfM8Lv86r9uVWAa2je4Z5zl4hgDHQQs4NTQjoHFsAOZZoAX0cNm5Gv:kX7tPMK8ctGe4Dzl4h2QnuPs/ZoXcv

Score

9^/10

collection credential_access discovery spyware stealer

Malware Config

Signatures

Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 10 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral1/memory/2188-11-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2860-10-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2760-17-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2760-16-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2188-9-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2188-8-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2860-7-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2760-19-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2860-24-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2188-29-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 4 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2188-11-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2188-9-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2188-8-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2188-29-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2860-10-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2860-7-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2860-24-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

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

Data from Local System
T1005

Credentials In Files
T1552.001

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	rnr.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2092 set thread context of 2860	2092	rnr.exe	31
PID 2092 set thread context of 2188	2092	rnr.exe	32
PID 2092 set thread context of 2760	2092	rnr.exe	33

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rnr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rnr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rnr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rnr.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2860	rnr.exe
2860	rnr.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
2092	rnr.exe
2092	rnr.exe
2092	rnr.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2760	rnr.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2860	2092	rnr.exe	31
PID 2092 wrote to memory of 2860	2092	rnr.exe	31
PID 2092 wrote to memory of 2860	2092	rnr.exe	31
PID 2092 wrote to memory of 2860	2092	rnr.exe	31
PID 2092 wrote to memory of 2188	2092	rnr.exe	32
PID 2092 wrote to memory of 2188	2092	rnr.exe	32
PID 2092 wrote to memory of 2188	2092	rnr.exe	32
PID 2092 wrote to memory of 2188	2092	rnr.exe	32
PID 2092 wrote to memory of 2760	2092	rnr.exe	33
PID 2092 wrote to memory of 2760	2092	rnr.exe	33
PID 2092 wrote to memory of 2760	2092	rnr.exe	33
PID 2092 wrote to memory of 2760	2092	rnr.exe	33

C:\Users\Admin\AppData\Local\Temp\rnr.exe
"C:\Users\Admin\AppData\Local\Temp\rnr.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Users\Admin\AppData\Local\Temp\rnr.exe
  C:\Users\Admin\AppData\Local\Temp\rnr.exe /stext "C:\Users\Admin\AppData\Local\Temp\dunfjkk"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  PID:2860
- C:\Users\Admin\AppData\Local\Temp\rnr.exe
  C:\Users\Admin\AppData\Local\Temp\rnr.exe /stext "C:\Users\Admin\AppData\Local\Temp\nosyjdvkvd"
  2⤵
  - Accesses Microsoft Outlook accounts
  - System Location Discovery: System Language Discovery
  PID:2188
- C:\Users\Admin\AppData\Local\Temp\rnr.exe
  C:\Users\Admin\AppData\Local\Temp\rnr.exe /stext "C:\Users\Admin\AppData\Local\Temp\pqyrkvfdrldtg"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\dunfjkk

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/2092-34-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2092-33-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2092-30-0x0000000010000000-0x0000000010019000-memory.dmp

Filesize
100KB

Download
memory/2188-11-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2188-9-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2188-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2188-6-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2188-2-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2188-8-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2760-16-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-15-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-19-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-17-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2760-13-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2860-7-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2860-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2860-10-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2860-4-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2860-1-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download

Analysis

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