nymaim | fbc6bc45a7fed79f3d44c4d2f3d0e2c469ae4ef24243bc0f5a3ae7eb6f395824

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
29/09/2022, 02:03

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General

Target
file.exe
Size 359KB
Sample220929-cgppnaafar
SHA256 fbc6bc45a7fed79f3d44c4d2f3d0e2c469ae4ef24243bc0f5a3ae7eb6f395824
MD5 586ba7b420923c1ea0d16600753993b1
SHA1 b4e13d100b5cd04c0c7f2e39c92fae9a1bdd65ba
SHA512 041496a91d8365eb32c00903b4e8439751153e293134a4b753b8839ed7ca730d3bc2e537b3cc5fc726e23730b0b6789bd8758e49a378e871ce7bbcb311debb9a
SSDEEP 6144:S/S+o4MBvzU7cD97Vtu88BRyC+lKHpeFwfiga3wVfg:S5MBY7cDc1BsQ43p
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
864	Cleaner.exe

Deletes itself 1 IoCs

pid	Process
572	cmd.exe

Loads dropped DLL 1 IoCs

pid	Process
2040	cmd.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 1 IoCs

pid	pid_target	Process	procid_target
760	864	WerFault.exe	32

Kills process with taskkill 1 IoCs

evasion

pid	Process
1940	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1972	file.exe
1972	file.exe
1972	file.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	864	Cleaner.exe
Token: SeDebugPrivilege	1940	taskkill.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1972 wrote to memory of 2040	1972	file.exe	30
PID 1972 wrote to memory of 2040	1972	file.exe	30
PID 1972 wrote to memory of 2040	1972	file.exe	30
PID 1972 wrote to memory of 2040	1972	file.exe	30
PID 2040 wrote to memory of 864	2040	cmd.exe	32
PID 2040 wrote to memory of 864	2040	cmd.exe	32
PID 2040 wrote to memory of 864	2040	cmd.exe	32
PID 2040 wrote to memory of 864	2040	cmd.exe	32
PID 864 wrote to memory of 760	864	Cleaner.exe	34
PID 864 wrote to memory of 760	864	Cleaner.exe	34
PID 864 wrote to memory of 760	864	Cleaner.exe	34
PID 1972 wrote to memory of 572	1972	file.exe	35
PID 1972 wrote to memory of 572	1972	file.exe	35
PID 1972 wrote to memory of 572	1972	file.exe	35
PID 1972 wrote to memory of 572	1972	file.exe	35
PID 572 wrote to memory of 1940	572	cmd.exe	37
PID 572 wrote to memory of 1940	572	cmd.exe	37
PID 572 wrote to memory of 1940	572	cmd.exe	37
PID 572 wrote to memory of 1940	572	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1972
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c start /I "" "C:\Users\Admin\AppData\Local\Temp\9EUQJDpHaha\Cleaner.exe"
  2⤵
  - Loads dropped DLL
  - Suspicious use of WriteProcessMemory
  PID:2040
- - C:\Users\Admin\AppData\Local\Temp\9EUQJDpHaha\Cleaner.exe
    "C:\Users\Admin\AppData\Local\Temp\9EUQJDpHaha\Cleaner.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:864
  - - C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 864 -s 1144
      4⤵
      Program crash
      PID:760
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:572
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1940

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Web Service

T1102

Credential Access

Discovery

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\9EUQJDpHaha\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\9EUQJDpHaha\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path C:\Users\Admin\AppData\Local\Temp\9EUQJDpHaha\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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Cleaner.exe

Path \Users\Admin\AppData\Local\Temp\9EUQJDpHaha\Cleaner.exe
Size 4.0MB
SHA256 f349739486dcb45f7cd39440784224c66a5d2c4bd2a47c48606e2f481a0fabe7
MD5 a1a19faf0af29841daeeaad999d899bd
SHA1 f67b9afdab167d5bcc544358b0e7fd2858784508
SHA512 a66ec486262e797bafd4fa032a719e499217993479fa78938e43db13289fe6fefc0ef3c3359e3cacb6223134396852be7cc9122c46ae74db3e9842d7f4fe65a8
SSDEEP 49152:M/PD/DL/D9CuZrr2h60qPGPD/jL/jdCuZrL2BaUKPmPD/jL/jdCuZrL2BaUKPs:M3D///UUrP6D/f/UULPaD/f/UULPs
MD5 SHA1 SHA512 SSDEEP

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memory/864-65-0x000007FEFBD21000-0x000007FEFBD23000-memory.dmp

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memory/864-67-0x00000000004D0000-0x0000000000512000-memory.dmp

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memory/864-64-0x0000000000EF0000-0x0000000001048000-memory.dmp

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memory/1972-69-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1972-58-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1972-68-0x0000000000528000-0x000000000054F000-memory.dmp

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memory/1972-54-0x0000000000528000-0x000000000054F000-memory.dmp

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memory/1972-56-0x0000000000528000-0x000000000054F000-memory.dmp

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memory/1972-71-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1972-57-0x0000000000220000-0x000000000025F000-memory.dmp

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memory/1972-76-0x0000000000528000-0x000000000054F000-memory.dmp

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memory/1972-77-0x0000000000400000-0x000000000045F000-memory.dmp

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memory/1972-55-0x0000000075501000-0x0000000075503000-memory.dmp

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