44caliber | 4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b

General

Target

4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe
Size

646KB
MD5

2eddb25910e24b0aec14096ec42cd9c8
SHA1

8f7a1c205e3b9447d3a433ff5712e0fdd95b7b26
SHA256

4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b
SHA512

986c09949f1c1dad7a57ef95e02f47f58e954ff42d1728fae4ee054fe70d9a45504f78654304307b8c0e1c9e98a97302bd6c2f7b581ed11aa40f9d4e81bdc09a
SSDEEP

12288:pxb63VILe4Ni8zGQa13Rsatd36JBH2YQeQd6m24AWtuzJNvAMNyaS/h:pxe3VIS4N9zGQaJRsUYznXjSiCiy

Score

10^/10

44caliber spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/1120478623254708224/cU4HxqyVDvr-lsj-hl3z5Ir-g2JNSHG6NQxON392Hdg4s-byv9nMxsyir7Kylc5QEWVh

Signatures

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

Checks computer location settings 2 TTPs 2 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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	Windows (2).exe

Executes dropped EXE 2 IoCs

pid	Process
3048	Windows (2).exe
3812	Windows.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
5	freegeoip.app
8	freegeoip.app

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

System Information Discovery
T1082

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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	Windows.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	Windows.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3812	Windows.exe
3812	Windows.exe
3812	Windows.exe
3812	Windows.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3812	Windows.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 532 wrote to memory of 3048	532	4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe	83
PID 532 wrote to memory of 3048	532	4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe	83
PID 3048 wrote to memory of 3812	3048	Windows (2).exe	84
PID 3048 wrote to memory of 3812	3048	Windows (2).exe	84

C:\Users\Admin\AppData\Local\Temp\4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe
"C:\Users\Admin\AppData\Local\Temp\4b1765e35f418e7a5698fd5709c11b98c6c4aff2637db48a7ad7b59a14b67b8b.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:532
- C:\Users\Admin\AppData\Local\Temp\Windows (2).exe
  "C:\Users\Admin\AppData\Local\Temp\Windows (2).exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:3048
- - C:\Users\Admin\AppData\Local\Temp\Windows.exe
    "C:\Users\Admin\AppData\Local\Temp\Windows.exe"
    3⤵
    - Executes dropped EXE
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3812

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

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\44\Process.txt

Filesize
548B

MD5
4c546752960f34c5e10b21c92957f625

SHA1
3e680f17bd8ff8c946d4f5dd503b6a230345714e

SHA256
0b8129695068c5a276ee40770e26af1ee8f09b45890eb257f7ccbfa5236d7dc7

SHA512
8f803d369ba9226cd770be8872ad67ea88b3a99cd2fb2a285336e12040a479025e6de92832ee362c254f2aa667536c6c5c404627b99dc346e8cb83dc5640f0d5

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

Filesize
764B

MD5
97579a0e07607bbfda7d98137276a6a4

SHA1
5e58a07f3c293a770f2b903e4bd68c8397aeda2a

SHA256
13e16059272e24249b1c00b889049ee50ff7a886a3f37039d182ac14cfc59442

SHA512
be509b379699fb9e8ff9cbeca17055e2760da43690bf8fd1b0df24953ea48bdbe358b59c5fbbb1acfd9daeb2be387c7b6d8c433c58aece6cffc0288deaa9517f

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

Filesize
1000B

MD5
7fc767288adccc59615311855a8e36be

SHA1
8784fef700c1cdf9b3ac7419c7ad0e7dfb508c9e

SHA256
23c8dfb302ebb4a4bba00faba33750bed64a62a4949903c6562a13f0f32d88dc

SHA512
61ce8e52084479d72b687bdbd8dfa2de9649d8535f66558e3f0c9d146a314a749ce3a58b4959241cf4f6829cade641b87429dfc2bac382818d7b2ee238d55133

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

Filesize
1KB

MD5
b5142382ba8b82d40496be280f75daf8

SHA1
c0cd61a6c9573c668eb00c5e350be95614da726e

SHA256
a8d31aabb3436eb04f4a3178df9d82215993a73a5b194d8e8a7471df6d10c334

SHA512
5d85a445eb0432a444db60a7d6435b2d4b4fa5a60231d230573d34bedd3e76f6151ab6312530d2aab0c8b70b3edc7d8526ed0f90e2c1f2bd1e102aa613566290

Download Submit
C:\Users\Admin\AppData\Local\Temp\Windows (2).exe

Filesize
540KB

MD5
ff406dfb1d83072ed678d823b5bc263c

SHA1
25f025bfc7297253817997db50b0970d863095e3

SHA256
dd1612a4bcd13f52a832f4759cfc0b6905b617445dbf36cde4495db5c647d178

SHA512
e9217f9c8b3167309b7f9dcc62f97140ee6791b7850dd1b27874df1d021c7cb7afe2bee7e5d41d33731e6dde7bc004cee092e1fa007d76af910806fa678804d2

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

Filesize
274KB

MD5
4fc218b2cfdb1ad177f035002cdcaddd

SHA1
e0ccc3dcac93a0c9e14799217bc5dff557d5079b

SHA256
c1996926fd51f8418e9095057b145e173b2b182c33c12aebd36500446ef0c55d

SHA512
d114ec692399ee7b9b5cd8b7e88e6e6c0a70569d910a2ba7ef8ec3c56aa23267a60d991dca33a66ece270ae882c65735c1a144a65bebd0d7c618262f4569e5ef

Download Submit
memory/532-3-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp

Filesize
10.8MB

Download
memory/532-39-0x00007FFB40EF0000-0x00007FFB419B1000-memory.dmp

Filesize
10.8MB

Download
memory/532-4-0x00000000034A0000-0x0000000003530000-memory.dmp

Filesize
576KB

Download
memory/532-0-0x00007FFB40EF3000-0x00007FFB40EF5000-memory.dmp

Filesize
8KB

Download
memory/532-2-0x000000001C430000-0x000000001C504000-memory.dmp

Filesize
848KB

Download
memory/532-1-0x0000000000860000-0x0000000000906000-memory.dmp

Filesize
664KB

Download
memory/3812-52-0x000001DA172D0000-0x000001DA1731A000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads