nymaim | f4338611e8a7c457d5dcf3b2186cdfd07639368b173528e5dbb3a2e244bb49ee

Analysis

max time kernel
109s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
28/09/2022, 05:39

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General

Target
file.exe
Size 414KB
Sample220928-gb96mafbb6
SHA256 f4338611e8a7c457d5dcf3b2186cdfd07639368b173528e5dbb3a2e244bb49ee
MD5 6d5de8fa3117116353eb394b93f0ac07
SHA1 705c91353d5f9bf26ecb4a3edc1e2a80c4b40f09
SHA512 3735b4dd6a93cf446fe0a9c7c97f7a47cf7a73e390feb4dbf012189b9dfd06ceac8aa04ac5e274ec8112e08d69f32489513351a2748d3fd5293cef1b1124b4f1
SSDEEP 6144:mQb9LhIzhwA+KVMtZ+6puD6SaFxQT0/jNnigabwVfs:mQbluzhw/K0+0uD6SwB5iB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim trojan

Malware Config

Extracted

Family

nymaim

208.67.104.97
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim
Downloads MZ/PE file

Executes dropped EXE 1 IoCs

pid	Process
1060	Cleaner.exe

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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	file.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 11 IoCs

pid	pid_target	Process	procid_target
528	3804	WerFault.exe	82
368	3804	WerFault.exe	82
2368	3804	WerFault.exe	82
5116	3804	WerFault.exe	82
2096	3804	WerFault.exe	82
1296	3804	WerFault.exe	82
1100	3804	WerFault.exe	82
2356	3804	WerFault.exe	82
2368	3804	WerFault.exe	82
4964	3804	WerFault.exe	82
4944	3804	WerFault.exe	82

Kills process with taskkill 1 IoCs

evasion

pid	Process
1812	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3804	file.exe
3804	file.exe
3804	file.exe
3804	file.exe
3804	file.exe
3804	file.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3804	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1060	Cleaner.exe
Token: SeDebugPrivilege	1812	taskkill.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3804 wrote to memory of 4584	3804	file.exe	107
PID 3804 wrote to memory of 4584	3804	file.exe	107
PID 3804 wrote to memory of 4584	3804	file.exe	107
PID 4584 wrote to memory of 1060	4584	cmd.exe	109
PID 4584 wrote to memory of 1060	4584	cmd.exe	109
PID 3804 wrote to memory of 4544	3804	file.exe	126
PID 3804 wrote to memory of 4544	3804	file.exe	126
PID 3804 wrote to memory of 4544	3804	file.exe	126
PID 4544 wrote to memory of 1812	4544	cmd.exe	130
PID 4544 wrote to memory of 1812	4544	cmd.exe	130
PID 4544 wrote to memory of 1812	4544	cmd.exe	130

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:3804
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 460
  2⤵
  - Program crash
  PID:528
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 772
  2⤵
  - Program crash
  PID:368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 808
  2⤵
  - Program crash
  PID:2368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 808
  2⤵
  - Program crash
  PID:5116
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 772
  2⤵
  - Program crash
  PID:2096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 944
  2⤵
  - Program crash
  PID:1296
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 1000
  2⤵
  - Program crash
  PID:1100
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 1168
  2⤵
  - Program crash
  PID:2356
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\50MbSVu5b7P1s8wI\Cleaner.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4584
- - C:\Users\Admin\AppData\Local\Temp\50MbSVu5b7P1s8wI\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\50MbSVu5b7P1s8wI\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:1060
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 1340
  2⤵
  - Program crash
  PID:2368
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 1816
  2⤵
  - Program crash
  PID:4964
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c taskkill /im "file.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4544
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1812
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3804 -s 1800
  2⤵
  - Program crash
  PID:4944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3804 -ip 3804
1⤵
PID:4820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3804 -ip 3804
1⤵
PID:2376

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3804 -ip 3804
1⤵
PID:2948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 3804 -ip 3804
1⤵
PID:2276

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 3804 -ip 3804
1⤵
PID:1308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3804 -ip 3804
1⤵
PID:4120

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 3804 -ip 3804
1⤵
PID:4556

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 588 -p 3804 -ip 3804
1⤵
PID:4316

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3804 -ip 3804
1⤵
PID:1664

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 3804 -ip 3804
1⤵
PID:4360

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3804 -ip 3804
1⤵
PID:4316

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

Bunifu_UI_v1.5.3.dll

Path C:\Users\Admin\AppData\Local\Temp\50MbSVu5b7P1s8wI\Bunifu_UI_v1.5.3.dll
Size 236KB
SHA256 f1b3e0f2750a9103e46a6a4a34f1cf9d17779725f98042cc2475ec66484801cf
MD5 2ecb51ab00c5f340380ecf849291dbcf
SHA1 1a4dffbce2a4ce65495ed79eab42a4da3b660931
SHA512 e241a48eafcaf99187035f0870d24d74ae97fe84aaadd2591cceea9f64b8223d77cfb17a038a58eadd3b822c5201a6f7494f26eea6f77d95f77f6c668d088e6b
SSDEEP 6144:SIQpxILDXGGMO7Ice9C5kQw2hWHcHTykhb:SIQpxILDXGGlET9n/cHG
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\50MbSVu5b7P1s8wI\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\50MbSVu5b7P1s8wI\Cleaner.exe
Size 4.2MB
SHA256 663a353b45ed8f3acd4abc429f519635c1cf1294e3b9af98ffe6b1d4937c0e8f
MD5 e89589df13ac2783f322449f63547468
SHA1 bd938f596e09e2ed04c3bc0f0ac68de71e04bcf6
SHA512 9e0126975b32d022b6fe89d4681981e57ef1a3c6375ee2df131ce3527a3ad91c795d75302b78c8fc59651e9e20cebfd177b3278a87f45f8174f9e4ec09fc9cc6
SSDEEP 98304:B3D///UUrPV0vER7ehER7ehER7ehER7ehER7ehER7ehER7ehER7eG:Zacfffffffb
MD5 SHA1 SHA512 SSDEEP

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memory/1060-144-0x000001DF30720000-0x000001DF30762000-memory.dmp

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memory/1060-145-0x00007FFCA9C20000-0x00007FFCAA6E1000-memory.dmp

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memory/1060-142-0x00007FFCA9C20000-0x00007FFCAA6E1000-memory.dmp

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memory/1060-141-0x000001DF2E7D0000-0x000001DF2E952000-memory.dmp

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memory/3804-140-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/3804-139-0x0000000000543000-0x0000000000569000-memory.dmp

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memory/3804-134-0x0000000000400000-0x000000000046C000-memory.dmp

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memory/3804-133-0x00000000004F0000-0x000000000052F000-memory.dmp

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memory/3804-132-0x0000000000543000-0x0000000000569000-memory.dmp

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memory/3804-146-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/3804-152-0x0000000000543000-0x0000000000569000-memory.dmp

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memory/3804-153-0x0000000000400000-0x000000000046C000-memory.dmp

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