strela | 5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605

Analysis

max time kernel
118s
max time network
123s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
11-10-2023 22:37

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General

Target

5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605_JC.js
Size

4.9MB
MD5

64ac20e66888256f82b39f5da285dbdb
SHA1

30f70383bce411d3c786609ff3743fd46ffd9183
SHA256

5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605
SHA512

bed46026e831ac1f1edcf51be4b3e3f6643121a791a809543642e2864f7ca55b9dfc34c13ff1f0380204ad7af9b7ccdc0cdc514cc71bc972df218030598f281a
SSDEEP

24576:F4gLbd4/jdgj6XF83IVmQqbNMpFokXb8hDr2wxvJzX5BGdzJhTfSrDyQgPQMXQLc:B4hv1c5ipfYBrnzmPbSqEhcvbUbU1

Score

10^/10

strela stealer

Malware Config

Extracted

Family

strela

193.109.85.77

Signatures

Strela
An info stealer targeting mail credentials first seen in late 2022.
stealer strela

Loads dropped DLL 1 IoCs

pid	Process
2608	regsvr32.exe

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

System Information Discovery
T1082

Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs

pid	Process
2608	regsvr32.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 1812	2968	wscript.exe	28
PID 2968 wrote to memory of 1812	2968	wscript.exe	28
PID 2968 wrote to memory of 1812	2968	wscript.exe	28
PID 1812 wrote to memory of 1672	1812	cmd.exe	30
PID 1812 wrote to memory of 1672	1812	cmd.exe	30
PID 1812 wrote to memory of 1672	1812	cmd.exe	30
PID 1812 wrote to memory of 2188	1812	cmd.exe	31
PID 1812 wrote to memory of 2188	1812	cmd.exe	31
PID 1812 wrote to memory of 2188	1812	cmd.exe	31
PID 1812 wrote to memory of 2608	1812	cmd.exe	34
PID 1812 wrote to memory of 2608	1812	cmd.exe	34
PID 1812 wrote to memory of 2608	1812	cmd.exe	34
PID 1812 wrote to memory of 2608	1812	cmd.exe	34
PID 1812 wrote to memory of 2608	1812	cmd.exe	34

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605_JC.js
1⤵
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /k copy "C:\Users\Admin\AppData\Local\Temp\5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605_JC.js" "C:\Users\Admin\AppData\Local\Temp\\twounequal.bat" && "C:\Users\Admin\AppData\Local\Temp\\twounequal.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1812
- - C:\Windows\system32\findstr.exe
    findstr /V stripedmiss ""C:\Users\Admin\AppData\Local\Temp\\twounequal.bat""
    3⤵
    PID:1672
- - C:\Windows\system32\certutil.exe
    certutil -f -decode tanmelt berrystay.dll
    3⤵
    PID:2188
- - C:\Windows\system32\regsvr32.exe
    regsvr32 berrystay.dll
    3⤵
    - Loads dropped DLL
    - Suspicious behavior: CmdExeWriteProcessMemorySpam
    PID:2608

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\berrystay.dll

Filesize
3.6MB

MD5
96ae03eb73981e451551d0c31ae4803c

SHA1
6c5b6f72c62258447c511872425391a82f5697c5

SHA256
b1cbd8f32f55f2fe15050d01952b9389dd9170834d7b5cc8d3d095be486b5a9f

SHA512
b97e192bf48de3b0d7c678533c5ffa1f855546c59d2475ce384b068db47a85737f2bfb4d15280504e6a87cdf8f2780a02bdeef507658b98b9d4d0f045db767f7

Download Submit
C:\Users\Admin\AppData\Local\Temp\tanmelt

Filesize
4.8MB

MD5
deb7e822e5488b548790341780d9d9ce

SHA1
41936997a78c800cee2b77869dc6e96e179fadc2

SHA256
ae7fb5cf6139d26becb7b663139636513d69c8a539062a8e6c2ac254f5f14eff

SHA512
613378883e16a514a8ff1d86a2bdfdc61435853a44a46fd671d9faf96bea45d9295d660e2a5697ea83863e636adc7fc67c06ca06d75a5e3e63a75e92355713d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\twounequal.bat

Filesize
4.9MB

MD5
64ac20e66888256f82b39f5da285dbdb

SHA1
30f70383bce411d3c786609ff3743fd46ffd9183

SHA256
5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605

SHA512
bed46026e831ac1f1edcf51be4b3e3f6643121a791a809543642e2864f7ca55b9dfc34c13ff1f0380204ad7af9b7ccdc0cdc514cc71bc972df218030598f281a

Download Submit
C:\Users\Admin\AppData\Local\Temp\twounequal.bat

Filesize
4.9MB

MD5
64ac20e66888256f82b39f5da285dbdb

SHA1
30f70383bce411d3c786609ff3743fd46ffd9183

SHA256
5c3eb5b07a659a40a9ae64ff894a99ba28e37396025e79ae5ac69da610b00605

SHA512
bed46026e831ac1f1edcf51be4b3e3f6643121a791a809543642e2864f7ca55b9dfc34c13ff1f0380204ad7af9b7ccdc0cdc514cc71bc972df218030598f281a

Download Submit
\Users\Admin\AppData\Local\Temp\berrystay.dll

Filesize
3.6MB

MD5
96ae03eb73981e451551d0c31ae4803c

SHA1
6c5b6f72c62258447c511872425391a82f5697c5

SHA256
b1cbd8f32f55f2fe15050d01952b9389dd9170834d7b5cc8d3d095be486b5a9f

SHA512
b97e192bf48de3b0d7c678533c5ffa1f855546c59d2475ce384b068db47a85737f2bfb4d15280504e6a87cdf8f2780a02bdeef507658b98b9d4d0f045db767f7

Download Submit
memory/2608-5676-0x000000006D7C0000-0x000000006DB65000-memory.dmp

Filesize
3.6MB

Download
memory/2608-5675-0x0000000000120000-0x0000000000141000-memory.dmp

Filesize
132KB

Download
memory/2608-5677-0x0000000000120000-0x0000000000141000-memory.dmp

Filesize
132KB

Download