marsstealer | bfac17bf9afcd4c29cf1ec35afea82c57aaa0507528b61dd1ee0e2e272512e19

General

Target

0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe
Size

6.8MB
MD5

9df2be3860081eb963d028592fb998f6
SHA1

9e93f1f4201ceba6cf7346856acda50fe50bed15
SHA256

0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1
SHA512

a3bee2c1825fae431c8a3d547cfbf927628a5ef9f7570ffa277c72bc4368dbebc3ae9a3b3af6401e85c70d62d91bd58524030f75ccaabb080ea2b75ea663a936
SSDEEP

12288:StZqbqjCnunwzLipJX3MJxOWM+XnYd3RrnADA+uom/YeBL:StDwUJ8SpoE/YeBL

Score

10^/10

marsstealer default spyware stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

Signatures

Mars Stealer
An infostealer written in C++ based on other infostealers.
stealer marsstealer

Executes dropped EXE 1 IoCs

pid	Process
2248	DRZM83HG5K.exe

Loads dropped DLL 5 IoCs

pid	Process
1056	0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe
1056	0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe
1792	WerFault.exe
1792	WerFault.exe
1792	WerFault.exe

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1792	2248	WerFault.exe	28

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1553.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8	DRZM83HG5K.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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	DRZM83HG5K.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1056 wrote to memory of 2248	1056	0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe	28
PID 1056 wrote to memory of 2248	1056	0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe	28
PID 1056 wrote to memory of 2248	1056	0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe	28
PID 1056 wrote to memory of 2248	1056	0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe	28
PID 2248 wrote to memory of 1792	2248	DRZM83HG5K.exe	30
PID 2248 wrote to memory of 1792	2248	DRZM83HG5K.exe	30
PID 2248 wrote to memory of 1792	2248	DRZM83HG5K.exe	30
PID 2248 wrote to memory of 1792	2248	DRZM83HG5K.exe	30

C:\Users\Admin\AppData\Local\Temp\0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe
"C:\Users\Admin\AppData\Local\Temp\0ea66c4bb51415da1cd18fb935dbf3f5e8cf671310b9fa9a1f847fdcb6cc46b1.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1056
- C:\ProgramData\DRZM83HG5K.exe
  "C:\ProgramData\DRZM83HG5K.exe"
  2⤵
  - Executes dropped EXE
  - Modifies system certificate store
  - Suspicious use of WriteProcessMemory
  PID:2248
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 1408
    3⤵
    - Loads dropped DLL
    - Program crash
    PID:1792

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Subvert Trust Controls

1

T1553

Install Root Certificate

1

T1553.004

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\ProgramData\DRZM83HG5K.exe

Filesize
159KB

MD5
ad89890757c177d7d05e2fbea0547772

SHA1
da871536caff869ea4a35f351b2fb90c6645b555

SHA256
1109fc5e54190e0b50cdc3c455af86887566968cdfb6df59c2bfb566ddb295af

SHA512
829584a81473350e2ace4a9ca1f25e3b63e2f7d376e0ff30846f97c91d805df35ff251431956d932d16f60e42846702ae8e53dea6f4bf2175d860983008eed49

Download Submit
memory/1056-0-0x0000000000DD0000-0x0000000000E68000-memory.dmp

Filesize
608KB

Download
memory/1056-1-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/1056-2-0x0000000000C30000-0x0000000000C70000-memory.dmp

Filesize
256KB

Download
memory/1056-12-0x0000000000BF0000-0x0000000000C2D000-memory.dmp

Filesize
244KB

Download
memory/1056-13-0x0000000000BF0000-0x0000000000C2D000-memory.dmp

Filesize
244KB

Download
memory/1056-15-0x0000000074890000-0x0000000074F7E000-memory.dmp

Filesize
6.9MB

Download
memory/2248-14-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download

Analysis

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