44caliber | c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d

Analysis

max time kernel
142s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
01/03/2022, 18:13

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General

Target
c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe
Size 793KB
Sample220301-wtyb4scfep
SHA256 c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d
MD5 f559e77721d8cc5bd97e037c4b3472cc
SHA1 f6dda6d685285301e23fd51338d0977fb5e03a6e
SHA512 64d6e8d0bc9862f9eab80d0fa95fdbb42eab44efed4a90abe1a6a0c8b1a308b5940d90740beb211dd6c375b8dd1fb1706a76f484ccf439cfc3bb2ae0aacb3dd9
MD5 SHA1 SHA512

Score

10^/10

44caliber evasion spyware stealer

Malware Config

Extracted

Family

44caliber

https://discord.com/api/webhooks/939927794656370699/MQUodH1jMxGoELXDI7vt3uVKvZAZN_FBkYRFlTiMVxHGCFnEzvPC7JNVH8-ESePeneQo

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
3548	loader_2.exe
4024	example.exe

Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489

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-1-5-21-1346565761-3498240568-4147300184-1000\Control Panel\International\Geo\Nation	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe

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

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

Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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 opened	\REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0	loader_2.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier	loader_2.exe

Kills process with taskkill 12 IoCs

evasion

pid	Process
3836	taskkill.exe
1880	taskkill.exe
1952	taskkill.exe
2588	taskkill.exe
4404	taskkill.exe
1308	taskkill.exe
4324	taskkill.exe
4612	taskkill.exe
712	taskkill.exe
3576	taskkill.exe
4700	taskkill.exe
4224	taskkill.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3548	loader_2.exe
3548	loader_2.exe
3548	loader_2.exe
3548	loader_2.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeDebugPrivilege	3548	loader_2.exe
Token: SeDebugPrivilege	712	taskkill.exe
Token: SeDebugPrivilege	1952	taskkill.exe
Token: SeDebugPrivilege	2588	taskkill.exe
Token: SeDebugPrivilege	4404	taskkill.exe
Token: SeDebugPrivilege	3576	taskkill.exe
Token: SeDebugPrivilege	4700	taskkill.exe
Token: SeDebugPrivilege	1308	taskkill.exe
Token: SeDebugPrivilege	3836	taskkill.exe
Token: SeDebugPrivilege	4224	taskkill.exe
Token: SeDebugPrivilege	1880	taskkill.exe
Token: SeDebugPrivilege	4324	taskkill.exe
Token: SeDebugPrivilege	4612	taskkill.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3744 wrote to memory of 3548	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	79
PID 3744 wrote to memory of 3548	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	79
PID 3744 wrote to memory of 4024	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	80
PID 3744 wrote to memory of 4024	3744	c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe	80
PID 4024 wrote to memory of 616	4024	example.exe	82
PID 4024 wrote to memory of 616	4024	example.exe	82
PID 616 wrote to memory of 712	616	cmd.exe	83
PID 616 wrote to memory of 712	616	cmd.exe	83
PID 4024 wrote to memory of 2028	4024	example.exe	85
PID 4024 wrote to memory of 2028	4024	example.exe	85
PID 2028 wrote to memory of 1952	2028	cmd.exe	86
PID 2028 wrote to memory of 1952	2028	cmd.exe	86
PID 4024 wrote to memory of 2360	4024	example.exe	87
PID 4024 wrote to memory of 2360	4024	example.exe	87
PID 2360 wrote to memory of 2588	2360	cmd.exe	88
PID 2360 wrote to memory of 2588	2360	cmd.exe	88
PID 4024 wrote to memory of 2804	4024	example.exe	89
PID 4024 wrote to memory of 2804	4024	example.exe	89
PID 2804 wrote to memory of 3860	2804	cmd.exe	90
PID 2804 wrote to memory of 3860	2804	cmd.exe	90
PID 4024 wrote to memory of 4808	4024	example.exe	91
PID 4024 wrote to memory of 4808	4024	example.exe	91
PID 4808 wrote to memory of 4404	4808	cmd.exe	92
PID 4808 wrote to memory of 4404	4808	cmd.exe	92
PID 4024 wrote to memory of 4368	4024	example.exe	93
PID 4024 wrote to memory of 4368	4024	example.exe	93
PID 4024 wrote to memory of 800	4024	example.exe	94
PID 4024 wrote to memory of 800	4024	example.exe	94
PID 800 wrote to memory of 3576	800	cmd.exe	95
PID 800 wrote to memory of 3576	800	cmd.exe	95
PID 4024 wrote to memory of 4288	4024	example.exe	96
PID 4024 wrote to memory of 4288	4024	example.exe	96
PID 4288 wrote to memory of 4700	4288	cmd.exe	97
PID 4288 wrote to memory of 4700	4288	cmd.exe	97
PID 4024 wrote to memory of 2312	4024	example.exe	98
PID 4024 wrote to memory of 2312	4024	example.exe	98
PID 2312 wrote to memory of 1308	2312	cmd.exe	99
PID 2312 wrote to memory of 1308	2312	cmd.exe	99
PID 4024 wrote to memory of 4604	4024	example.exe	100
PID 4024 wrote to memory of 4604	4024	example.exe	100
PID 4604 wrote to memory of 1244	4604	cmd.exe	102
PID 4604 wrote to memory of 1244	4604	cmd.exe	102
PID 4024 wrote to memory of 2700	4024	example.exe	101
PID 4024 wrote to memory of 2700	4024	example.exe	101
PID 2700 wrote to memory of 3836	2700	cmd.exe	103
PID 2700 wrote to memory of 3836	2700	cmd.exe	103
PID 4024 wrote to memory of 4948	4024	example.exe	104
PID 4024 wrote to memory of 4948	4024	example.exe	104
PID 4024 wrote to memory of 4676	4024	example.exe	108
PID 4024 wrote to memory of 4676	4024	example.exe	108
PID 4676 wrote to memory of 4224	4676	cmd.exe	109
PID 4676 wrote to memory of 4224	4676	cmd.exe	109
PID 4024 wrote to memory of 1936	4024	example.exe	110
PID 4024 wrote to memory of 1936	4024	example.exe	110
PID 1936 wrote to memory of 1880	1936	cmd.exe	111
PID 1936 wrote to memory of 1880	1936	cmd.exe	111
PID 4024 wrote to memory of 1740	4024	example.exe	112
PID 4024 wrote to memory of 1740	4024	example.exe	112
PID 1740 wrote to memory of 4324	1740	cmd.exe	113
PID 1740 wrote to memory of 4324	1740	cmd.exe	113
PID 4024 wrote to memory of 3108	4024	example.exe	114
PID 4024 wrote to memory of 3108	4024	example.exe	114
PID 3108 wrote to memory of 4500	3108	cmd.exe	115
PID 3108 wrote to memory of 4500	3108	cmd.exe	115

C:\Users\Admin\AppData\Local\Temp\c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe
"C:\Users\Admin\AppData\Local\Temp\c6181c98720e7976fdf7356503ae8ec501136ca26028796fee8e666813bd5e5d.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3744
- C:\Users\Admin\AppData\Local\Temp\loader_2.exe
  "C:\Users\Admin\AppData\Local\Temp\loader_2.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3548
- C:\Users\Admin\AppData\Local\Temp\example.exe
  "C:\Users\Admin\AppData\Local\Temp\example.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:4024
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:616
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:712
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2028
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:1952
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2360
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2588
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c sc stop HTTPDebuggerPro >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2804
  - - C:\Windows\system32\sc.exe
      sc stop HTTPDebuggerPro
      4⤵
      PID:3860
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /IM HTTPDebuggerSvc.exe /F >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4808
  - - C:\Windows\system32\taskkill.exe
      taskkill /IM HTTPDebuggerSvc.exe /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4404
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c @RD /S /Q "C:\Users\%username%\AppData\Local\Microsoft\Windows\INetCache\IE" >nul 2>&1
    3⤵
    PID:4368
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:800
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3576
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4288
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4700
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2312
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:1308
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c sc stop HTTPDebuggerPro >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4604
  - - C:\Windows\system32\sc.exe
      sc stop HTTPDebuggerPro
      4⤵
      PID:1244
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /IM HTTPDebuggerSvc.exe /F >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2700
  - - C:\Windows\system32\taskkill.exe
      taskkill /IM HTTPDebuggerSvc.exe /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3836
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c @RD /S /Q "C:\Users\%username%\AppData\Local\Microsoft\Windows\INetCache\IE" >nul 2>&1
    3⤵
    PID:4948
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4676
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq fiddler*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4224
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1936
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq wireshark*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:1880
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1740
  - - C:\Windows\system32\taskkill.exe
      taskkill /FI "IMAGENAME eq httpdebugger*" /IM * /F /T
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4324
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c sc stop HTTPDebuggerPro >nul 2>&1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3108
  - - C:\Windows\system32\sc.exe
      sc stop HTTPDebuggerPro
      4⤵
      PID:4500
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c taskkill /IM HTTPDebuggerSvc.exe /F >nul 2>&1
    3⤵
    PID:4508
  - - C:\Windows\system32\taskkill.exe
      taskkill /IM HTTPDebuggerSvc.exe /F
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4612
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c @RD /S /Q "C:\Users\%username%\AppData\Local\Microsoft\Windows\INetCache\IE" >nul 2>&1
    3⤵
    PID:3192

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

Impair Defenses

T1562

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

memory/3548-132-0x0000000000310000-0x000000000035A000-memory.dmp

Download

memory/3548-135-0x00007FFC86943000-0x00007FFC86945000-memory.dmp

Download

memory/3548-136-0x00000000024D0000-0x00000000024D2000-memory.dmp

Download