marsstealer | b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5

Analysis

max time kernel
142s
max time network
163s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
05-04-2024 01:39

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General

Target

b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe
Size

668KB
MD5

1ff8f5b71d19c4faffa31dfdc21fd263
SHA1

cb42386f7fd958812ffcfff9b0c107158eca5994
SHA256

b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5
SHA512

74a1e83bc9a03ffadf78c18a7bb056724c17b6dce3e85ed214282ca38adb47d52a3f8c48c82a1b9c25014c7739f4dcd18faf3a6b81bf90247f6d3086d16698fa
SSDEEP

12288:jkZbvRx3JGXdvLI/tt5AzzCRlr+RGc6xyArqg5GnD8LVduHRvBHnVr7MHWrgcli7:xRWy68/ghD7q

Score

10^/10

marsstealer default stealer

Malware Config

Extracted

Family

marsstealer

Botnet

Default

Signatures

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

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:

b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe

Executes dropped EXE 1 IoCs

Processes:

PWUCL9PRV.exe

pid process

852 PWUCL9PRV.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
852	PWUCL9PRV.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe

description	pid	process	target process
PID 696 wrote to memory of 852	696	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe	PWUCL9PRV.exe
PID 696 wrote to memory of 852	696	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe	PWUCL9PRV.exe
PID 696 wrote to memory of 852	696	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe	PWUCL9PRV.exe

C:\Users\Admin\AppData\Local\Temp\b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe
"C:\Users\Admin\AppData\Local\Temp\b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:696

C:\Users\Admin\AppData\Local\Temp\PWUCL9PRV.exe
"C:\Users\Admin\AppData\Local\Temp\PWUCL9PRV.exe"
2⤵
- Executes dropped EXE
PID:852

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3776 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8
1⤵
PID:1360

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\PWUCL9PRV.exe
Filesize
159KB

MD5
92302995a9204718c11d721b3b8b3edd

SHA1
f018ecd683ba6cb7e3aa075b4eb92c1ba4b8a2a9

SHA256
8a09643eaff0b5e8fb553b92282ec01baa9c9f6a2990ae7f7cdb11db6216b098

SHA512
f862bd8f745ec016a63de3d59e31a97186229244c851c38a4b5abfab32535b3817f35afdcd0b082c4ff4de1e64d9f44c83f9daec212ec7c8614c59dec97598e5

Download Submit
memory/696-0-0x0000000074F00000-0x00000000756B0000-memory.dmp

Filesize
7.7MB

Download
memory/696-1-0x00000000006D0000-0x000000000077C000-memory.dmp

Filesize
688KB

Download
memory/696-2-0x0000000005210000-0x0000000005220000-memory.dmp

Filesize
64KB

Download
memory/696-13-0x0000000074F00000-0x00000000756B0000-memory.dmp

Filesize
7.7MB

Download
memory/852-11-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download