44caliber | 448967b377216a712b478014c50cd629c0206d2dd92ab9c0dae06a7664a5319e

General

Target

JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe
Size

584KB
MD5

77b51b8a444051c06b2c3ab6c8007918
SHA1

b30f9b6c953fcda79d55a6b543b06cd74fede024
SHA256

448967b377216a712b478014c50cd629c0206d2dd92ab9c0dae06a7664a5319e
SHA512

07942e91af9dc7b08095af6da7c2adb918f68901605db55bed10acc6f336db9860390fd57e99231dbbce7b6ec694651689e4fdf996d80f69649822c5a0662981
SSDEEP

12288:EzxzTDWikLSb4NS7ET+tG1XIOwfeunRAa3iZKl7LaXckptdq:CDWHSb4NhuO3cRAaSZKl7ZkptU

Score

10^/10

44caliber discovery spyware stealer

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/898882176861499423/G8KdTLkgIFoIqay3cr06uUQESE6aJK-HhfEEQTfxaofinc_qsYiGOih8kKR3fXHbXjKJ

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
3020	.gmx82.sfx.exe
2820	.gmx82.exe

Loads dropped DLL 2 IoCs

pid	Process
1840	cmd.exe
3020	.gmx82.sfx.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
4	freegeoip.app
5	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 3 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	.gmx82.sfx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.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	.gmx82.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	.gmx82.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2820	.gmx82.exe
2820	.gmx82.exe
2820	.gmx82.exe
2820	.gmx82.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2820	.gmx82.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 1840	1624	JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe	30
PID 1624 wrote to memory of 1840	1624	JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe	30
PID 1624 wrote to memory of 1840	1624	JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe	30
PID 1624 wrote to memory of 1840	1624	JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe	30
PID 1840 wrote to memory of 3020	1840	cmd.exe	32
PID 1840 wrote to memory of 3020	1840	cmd.exe	32
PID 1840 wrote to memory of 3020	1840	cmd.exe	32
PID 1840 wrote to memory of 3020	1840	cmd.exe	32
PID 3020 wrote to memory of 2820	3020	.gmx82.sfx.exe	33
PID 3020 wrote to memory of 2820	3020	.gmx82.sfx.exe	33
PID 3020 wrote to memory of 2820	3020	.gmx82.sfx.exe	33
PID 3020 wrote to memory of 2820	3020	.gmx82.sfx.exe	33

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_77b51b8a444051c06b2c3ab6c8007918.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat" "
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1840
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\.gmx82.sfx.exe
    .gmx82.sfx.exe -pflappy
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3020
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\.gmx82.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\.gmx82.exe"
      4⤵
      Executes dropped EXE
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2820

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

1

T1012

System Information Discovery

2

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

Replay Monitor

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Downloads

C:\ProgramData\44\Process.txt

Filesize
489B

MD5
7f3d46ca3a83724bbd2b7adac7892e9d

SHA1
28770fec069d6bd593a20a239b828ea68875e9de

SHA256
8f785d648a53cb11f25f8538be56e226b588afed56c1654f1c3340c7e8a43bac

SHA512
ef761ff8bab0173426b3abce99dac16217410bd3ff1475c98abd20e726628f38346e832e6bf3e08734e48d7ba9a2f83a62434add55875715ab59baf1c737fa13

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.bat

Filesize
41B

MD5
64eff6d2b142b317bce7f7c6e465784b

SHA1
30d2c8fc5b3d0f4538773a0c1f885f1db077c1f9

SHA256
63d20ca0dc949919cd5460e869afc5d88969b35abf4a4da70f9127da84d7e182

SHA512
77a3f408ccaac401cf85eae6f550963526817b1aaa06c2db249f32605cb32b393715488b8fcba8540396c65c5586a1bbe3b5ad90d7e65f17454f5cab9b693710

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX0\.gmx82.sfx.exe

Filesize
412KB

MD5
3110f66f74c2e14d9e2d87c8a059c3d7

SHA1
42932a17f44d054bd836c42c0f87487bf9a4b5b0

SHA256
60cf564175a7b34526ebfab6a4fb98b7e45ae3a4aa3bd6019cffbfbc6420d0e1

SHA512
3c6b65f5be96eca313090e842e6c5e3d9cc81083f88e02df7fa18eb561a6996b95241e6b2b391e5df886c1405150feb8c0af4fd03ee18c18c3704df200366348

Download Submit
\Users\Admin\AppData\Local\Temp\RarSFX1\.gmx82.exe

Filesize
274KB

MD5
6f547c22113f9bf60d1171ba870cb004

SHA1
0111cf1bdfe4638d10339b0598998c3767d73506

SHA256
562476c6db9fec7e82c157619625f2dc46122eb45203f2fdbd11ac7b3f9ac16f

SHA512
4abdedb1771d496283107dda73fb1b902339316f708426d287794aa8915e677ba3de445ebcc8db08eabcd9ea3f90c863e040e90d36e0aa1daeee61aa797e33af

Download Submit
memory/2820-29-0x0000000001240000-0x000000000128A000-memory.dmp

Filesize
296KB

Download

Analysis

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