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

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

pid	Process
852	PWUCL9PRV.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 696 wrote to memory of 852	696	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe	96
PID 696 wrote to memory of 852	696	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe	96
PID 696 wrote to memory of 852	696	b7737850b4f9843c60a23ca39b81fecdb60a04fbcd5839326f854f0a092f95c5.exe	96

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 Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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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