stealc | 39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d

General

Target

JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe
Size

749.8MB
MD5

2b09d7bb9cf9886f81f103558dbefa43
SHA1

8c70736bdb52305d3e295ff54547b3387778166e
SHA256

39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d
SHA512

98b721dc222f4ac91ea63921b7c265fe67c0f7d96693a426d8fa7ce2ee0e2ff2237bae7bfac679e5735c031d45019caf450555816ac1ea948c0d668d667900b4
SSDEEP

49152:kBuZrEUPwGjLiIX1LJLJZ2iZ3vxm3c7ld:6kLPwwLTXjXvm3ch

Score

10^/10

stealc default discovery stealer

Malware Config

Extracted

Family

stealc

Botnet

default

C2

http://185.161.248.78

Attributes

url_path
/eba140b7c5f2f228.php

rc4.plain

Signatures

Detects Stealc stealer 3 IoCs

stealer

resource	yara_rule
behavioral2/memory/388-26-0x0000000000400000-0x0000000000629000-memory.dmp	family_stealc
behavioral2/memory/388-27-0x0000000000400000-0x0000000000629000-memory.dmp	family_stealc
behavioral2/memory/388-32-0x0000000000400000-0x0000000000629000-memory.dmp	family_stealc

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Stealc family
stealc

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp

Executes dropped EXE 2 IoCs

pid	Process
4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp
388	Sеtup.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4436	388	WerFault.exe	86

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	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sеtup.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp
4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1472 wrote to memory of 4932	1472	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe	83
PID 1472 wrote to memory of 4932	1472	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe	83
PID 1472 wrote to memory of 4932	1472	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe	83
PID 4932 wrote to memory of 388	4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp	86
PID 4932 wrote to memory of 388	4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp	86
PID 4932 wrote to memory of 388	4932	JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp	86

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1472
- C:\Users\Admin\AppData\Local\Temp\is-7DF78.tmp\JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-7DF78.tmp\JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp" /SL5="$60180,978165,844288,C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:4932
- - C:\Users\Admin\Data\Sеtup.exe
    "C:\Users\Admin\Data\Sеtup.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:388
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 388 -s 336
      4⤵
      Program crash
      PID:4436

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 388 -ip 388
1⤵
PID:4124

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\is-7DF78.tmp\JaffaCakes118_39a973d7341e94d962f89bf898ecb582d9798c7c8aad415551777aacbd18a90d.tmp

Filesize
3.0MB

MD5
4475e9ba18e48f121e5885a88a7f514d

SHA1
51056fcc1ab1cc5d242ef751c9a1508868b58fbb

SHA256
f51a6b0ada2b30b7ceeab020fd3718e20c6ee97619e3c19f346cb0b257a50c63

SHA512
b7fcab45d04e9397ca9590748b8b6637ff8993b4c427046e0ed7d5e01b228bb66ee27de7fe2371fecdb5b20b8f9964e5e4bc96c4aef00df208b0d1c8d3f79078

Download Submit
C:\Users\Admin\Data\Sеtup.exe

Filesize
206KB

MD5
cf6a7ae795e3dcde632ab66eee90627c

SHA1
2c0498b668d3c474207c82ee6c0b8652daac1544

SHA256
1c461f0da6e91f50fa1a22fca9c306b745669697110fa3ba71bbdf8851dd0268

SHA512
69efe2b04bb0557fa0bd1e7304f48bed40d5d29a3a5dd444bba7cddba048892a9af8c7fbd70085be3acd90c254f0f6b29d94e4df994a3330cedaf22026f46992

Download Submit
memory/388-26-0x0000000000400000-0x0000000000629000-memory.dmp

Filesize
2.2MB

Download
memory/388-27-0x0000000000400000-0x0000000000629000-memory.dmp

Filesize
2.2MB

Download
memory/388-32-0x0000000000400000-0x0000000000629000-memory.dmp

Filesize
2.2MB

Download
memory/1472-0-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/1472-2-0x0000000000401000-0x00000000004B7000-memory.dmp

Filesize
728KB

Download
memory/1472-16-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/1472-31-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/4932-6-0x0000000000400000-0x0000000000717000-memory.dmp

Filesize
3.1MB

Download
memory/4932-25-0x0000000000400000-0x0000000000717000-memory.dmp

Filesize
3.1MB

Download
memory/4932-30-0x0000000000400000-0x0000000000717000-memory.dmp

Filesize
3.1MB

Download

Analysis

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