44caliber | e20f2a6dcc54524c456a339dc0d4d6d943f115980ae3959f83c6796becdce8cd

General

Target

Release.exe
Size

586KB
MD5

5baa2d8574f45208fcefb8eef68733f5
SHA1

15fe222ddfebc44946f39be2aaf06ca1eb2f76f7
SHA256

e20f2a6dcc54524c456a339dc0d4d6d943f115980ae3959f83c6796becdce8cd
SHA512

40457ddb05cbd5bae8d8dce7dfcb5fe5e482cfe591a9cc9455a7f8c406a4c887b21fbb71ab27b1eaa1e112392f61bdb6a6729d6203c7977eaa99770c630f27c8
SSDEEP

12288:eKry2/qZXzmLT+tGHAioNRwhEGATZNjwgRcnSR/iCo2SgQ:5ry2uXzmDgio4hE3j/NR/iCjLQ

Score

10^/10

44caliber discovery spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/903397681865576489/e3jD3bth-gH8swR6V0ji8YeJKHIkIb51ywNDwlXFWkBcrhriQYmNx8D7F0Dm0HBXsodO

Signatures

44Caliber
An open source infostealer written in C#.
stealer 44caliber
44Caliber family
44caliber

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-1-5-21-805952410-2104024357-1716932545-1000\Control Panel\International\Geo\Nation	Release.exe

Executes dropped EXE 1 IoCs

pid	Process
1784	Insidious.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials In Files
T1552.001

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
6	freegeoip.app
7	freegeoip.app

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Release.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Insidious.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Insidious.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1784	Insidious.exe
1784	Insidious.exe
1784	Insidious.exe
1784	Insidious.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1784	Insidious.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 1784	3980	Release.exe	87
PID 3980 wrote to memory of 1784	3980	Release.exe	87

C:\Users\Admin\AppData\Local\Temp\Release.exe
"C:\Users\Admin\AppData\Local\Temp\Release.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Insidious.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Insidious.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1784

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

2

T1552

Credentials In Files

2

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\Insidious.exe

Filesize
274KB

MD5
8b472b5e0ecbe83650a22e51a202c343

SHA1
030c10259d7f0ec0400e87d8b6e1aa05adf80329

SHA256
78b08796b0a6cdc6a1bebeac9daeb51c76884a6e4d27a817ca2e9ac74c3d8a98

SHA512
7bfbf18d41ce5aeb8ce0df1df5c4b5b861ee55bade07a3277909f06da6d9950ba57ee79d6e7440edc327832e9b8a0b5c5c84889a829f9212c728999062efdade

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Insidious.pdb

Filesize
865KB

MD5
8119ea02b8fbb3200391d5410f68c00b

SHA1
e163d5a3860b47444e8220f9729eefea50311504

SHA256
85a36abd25f0f94f888e05d35e60537efddc87126a49436a5dd8df09b4e92380

SHA512
18ad7d38eafb2aba37788901807e4c9c3209bfb16ebbc26b73adc0e5eb89e93a27753c8d6a4ee9fcee115c007ee2fdeaf269c68bb4f2d0b3c6bca56779a419e8

Download Submit
C:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
1KB

MD5
f14f90e05fd48fdfc17f18cd8ae30c1d

SHA1
eaf8e2bc0c5eb6a01fd2ee91a02b8ebfd9134fbe

SHA256
c73e4fca6aace30b793a414276d32010ff5a0da0c977251b4422eed90e2ad719

SHA512
a8fc54b3248f589f22e097ffa81a9ca462e74beb1d9000049015546ac86ff6835d700edd46d787b80f8c2bdb626ae254a147a524f0a6a63f7352aeb217e051aa

Download Submit
C:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
1KB

MD5
6ef10d77b7683d2926dc8c76f92708dd

SHA1
10b10b80b7efcc73e9cc40c7257d6e39278b670b

SHA256
cfc05dd1812dcc3bddc56e4ac5534d45e69c8c0c4d1b361b3d7c3c7e2d551f09

SHA512
dab704cff0d9639da121a6e88a093481d5bd3cbe6c434e30a8f26b4649385b77d29624ad537a2067f67df155cce6144e782baa11384dba079b2b0dad33a07590

Download Submit
C:\Users\Admin\AppData\Roaming\44\Process.txt

Filesize
755B

MD5
6f89ca62fb45e895d4ad6d82ede072f9

SHA1
dcd2a30872bd1d70e1f34cd8a7ffa304631f14b2

SHA256
958d8f5e3a20d236636f225f501b628a367d2948a889f110f9f9631a16a5fca2

SHA512
b77bbbd6e8c00af32d7d0a6a2b810b4ae6b864013ea749b94e13626b8c32af86111d6c7650ca8c627da5b0894d4aa2f8acec57d8b62e07010c271cd3bd5866f1

Download Submit
memory/1784-22-0x00007FFA59893000-0x00007FFA59895000-memory.dmp

Filesize
8KB

Download
memory/1784-23-0x0000000000DF0000-0x0000000000E3A000-memory.dmp

Filesize
296KB

Download
memory/1784-50-0x00007FFA59890000-0x00007FFA5A351000-memory.dmp

Filesize
10.8MB

Download
memory/1784-142-0x00007FFA59890000-0x00007FFA5A351000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads