redline | 4905ecda46a5a03e0d6c5a8144ec47063109fc2eb5fbb5e06722080e63eb7394

General

Target

Chron.exe
Size

490KB
MD5

f87135178fe6abd26406c9a9d026894a
SHA1

dfcea258c1e56097601f7a5e7fb4e4f9a6aec3eb
SHA256

4905ecda46a5a03e0d6c5a8144ec47063109fc2eb5fbb5e06722080e63eb7394
SHA512

885ec3c0a56ec5247579f85ae83d909c43264c4466dfeab24bb7d2d388f1a3f2abce0136303726384c2c91b2a398d84e8ec09c21ef81c70e74157d21f9c7b251
SSDEEP

6144:FLXU3QBk29LvIY28arOtXNt25Qd9lxtPoCFbfgKrcwny2BHaxK7:5U3yu9WQQT9oCFKwn7B6i

Score

10^/10

redline ytstealer crypt_mastif_v1 infostealer spyware stealer upx

Malware Config

Extracted

Family

redline

Botnet

Crypt_Mastif_V1

C2

194.36.177.60:81

Attributes

auth_value
140a3d1ac14114893f898a1e7e4ba24f

Signatures

RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

RedLine payload 2 IoCs

resource	yara_rule
behavioral2/memory/2740-134-0x0000000000400000-0x0000000000428000-memory.dmp	family_redline
behavioral2/memory/2740-135-0x0000000000422206-mapping.dmp	family_redline

YTStealer
YTStealer is a malware designed to steal YouTube authentication cookies.
stealer ytstealer

YTStealer payload 2 IoCs

resource	yara_rule
behavioral2/memory/4944-153-0x0000000000F50000-0x0000000001D62000-memory.dmp	family_ytstealer
behavioral2/memory/4944-157-0x0000000000F50000-0x0000000001D62000-memory.dmp	family_ytstealer

Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
4944	22windows_64.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x0001000000022e02-150.dat	upx
behavioral2/files/0x0001000000022e02-151.dat	upx
behavioral2/memory/4944-152-0x0000000000F50000-0x0000000001D62000-memory.dmp	upx
behavioral2/memory/4944-153-0x0000000000F50000-0x0000000001D62000-memory.dmp	upx
behavioral2/memory/4944-157-0x0000000000F50000-0x0000000001D62000-memory.dmp	upx

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
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3752 set thread context of 2740	3752	Chron.exe	87

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3752	Chron.exe
3752	Chron.exe
3752	Chron.exe
3752	Chron.exe
3752	Chron.exe
3752	Chron.exe
2740	InstallUtil.exe
2740	InstallUtil.exe
3584	powershell.exe
3584	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3752	Chron.exe
Token: SeDebugPrivilege	2740	InstallUtil.exe
Token: SeDebugPrivilege	3584	powershell.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3752 wrote to memory of 3616	3752	Chron.exe	84
PID 3752 wrote to memory of 3616	3752	Chron.exe	84
PID 3752 wrote to memory of 3616	3752	Chron.exe	84
PID 3752 wrote to memory of 5040	3752	Chron.exe	85
PID 3752 wrote to memory of 5040	3752	Chron.exe	85
PID 3752 wrote to memory of 5040	3752	Chron.exe	85
PID 3752 wrote to memory of 4168	3752	Chron.exe	86
PID 3752 wrote to memory of 4168	3752	Chron.exe	86
PID 3752 wrote to memory of 4168	3752	Chron.exe	86
PID 3752 wrote to memory of 4168	3752	Chron.exe	86
PID 3752 wrote to memory of 4168	3752	Chron.exe	86
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 3752 wrote to memory of 2740	3752	Chron.exe	87
PID 2740 wrote to memory of 4944	2740	InstallUtil.exe	94
PID 2740 wrote to memory of 4944	2740	InstallUtil.exe	94
PID 4944 wrote to memory of 3584	4944	22windows_64.exe	96
PID 4944 wrote to memory of 3584	4944	22windows_64.exe	96

C:\Users\Admin\AppData\Local\Temp\Chron.exe
"C:\Users\Admin\AppData\Local\Temp\Chron.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3752
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:3616
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:5040
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:4168
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Users\Admin\AppData\Local\Temp\22windows_64.exe
    "C:\Users\Admin\AppData\Local\Temp\22windows_64.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:4944
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell "" "Get-WmiObject Win32_PortConnector"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3584

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\22windows_64.exe

Filesize
4.0MB

MD5
eaaad4f36853f423ee62272e125708ff

SHA1
71c045b6a66fef5dd1f20faefbce8df88c890788

SHA256
1901ae31080f9b8f7c419290eab011086a00355a0451e9f634f545f771753901

SHA512
05292ae056faf45359b62d8feb6926c1144623e997df0893b9a74e423b84761f2ab6e3786c7fc5d7784e3ae9bff7c2e21166cbb7723f6315538357e674587431

Download Submit
C:\Users\Admin\AppData\Local\Temp\22windows_64.exe

Filesize
4.0MB

MD5
eaaad4f36853f423ee62272e125708ff

SHA1
71c045b6a66fef5dd1f20faefbce8df88c890788

SHA256
1901ae31080f9b8f7c419290eab011086a00355a0451e9f634f545f771753901

SHA512
05292ae056faf45359b62d8feb6926c1144623e997df0893b9a74e423b84761f2ab6e3786c7fc5d7784e3ae9bff7c2e21166cbb7723f6315538357e674587431

Download Submit
memory/2740-138-0x0000000005EC0000-0x00000000064D8000-memory.dmp

Filesize
6.1MB

Download
memory/2740-134-0x0000000000400000-0x0000000000428000-memory.dmp

Filesize
160KB

Download
memory/2740-144-0x00000000086E0000-0x0000000008746000-memory.dmp

Filesize
408KB

Download
memory/2740-145-0x0000000009E20000-0x0000000009FE2000-memory.dmp

Filesize
1.8MB

Download
memory/2740-139-0x0000000007740000-0x000000000784A000-memory.dmp

Filesize
1.0MB

Download
memory/2740-140-0x0000000005DF0000-0x0000000005E02000-memory.dmp

Filesize
72KB

Download
memory/2740-141-0x00000000078D0000-0x000000000790C000-memory.dmp

Filesize
240KB

Download
memory/2740-142-0x0000000008BF0000-0x0000000009194000-memory.dmp

Filesize
5.6MB

Download
memory/2740-143-0x0000000008640000-0x00000000086D2000-memory.dmp

Filesize
584KB

Download
memory/2740-146-0x000000000A520000-0x000000000AA4C000-memory.dmp

Filesize
5.2MB

Download
memory/2740-147-0x0000000009370000-0x00000000093E6000-memory.dmp

Filesize
472KB

Download
memory/2740-148-0x00000000093F0000-0x0000000009440000-memory.dmp

Filesize
320KB

Download
memory/3584-155-0x0000014EF99D0000-0x0000014EF99F2000-memory.dmp

Filesize
136KB

Download
memory/3584-156-0x00007FFAB68B0000-0x00007FFAB7371000-memory.dmp

Filesize
10.8MB

Download
memory/3752-132-0x000001CD2B140000-0x000001CD2B1C0000-memory.dmp

Filesize
512KB

Download
memory/3752-133-0x00007FFAB7130000-0x00007FFAB7BF1000-memory.dmp

Filesize
10.8MB

Download
memory/3752-137-0x00007FFAD6610000-0x00007FFAD6805000-memory.dmp

Filesize
2.0MB

Download
memory/3752-136-0x00007FFAB7130000-0x00007FFAB7BF1000-memory.dmp

Filesize
10.8MB

Download
memory/4944-157-0x0000000000F50000-0x0000000001D62000-memory.dmp

Filesize
14.1MB

Download
memory/4944-152-0x0000000000F50000-0x0000000001D62000-memory.dmp

Filesize
14.1MB

Download
memory/4944-153-0x0000000000F50000-0x0000000001D62000-memory.dmp

Filesize
14.1MB

Download

Analysis

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