nymaim | f89eeaa6aecf68d0e2e464fa2fcba98057a1cd5e96f7b586d5e3405f4006cfd2

Analysis

max time kernel
91s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/10/2022, 00:10

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General

Target
file.exe
Size 397KB
Sample221007-af2xgsbdbq
SHA256 f89eeaa6aecf68d0e2e464fa2fcba98057a1cd5e96f7b586d5e3405f4006cfd2
MD5 bdd86172c42d661392145620b407985a
SHA1 df64fa9c0764e25f6e9d8f9bda7fd1c1e30ddc96
SHA512 85e9d1cde7734de3478b5faac657b237011f3a93ced796041605fb7563922534923bf94f39e35c5450279d5d46a9c7bc941343af6a5d2415e62476c7a4033e42
SSDEEP 6144:1idIET0I/87rTERXu0NixRmwB0AiFNtKzrSuzbgwuT48ZBwVfU:1EfTL87811NiuwB0AiFHYSunn840
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

Executes dropped EXE 1 IoCs

pid	Process
1604	rFaB2.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	file.exe

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

System Information Discovery
T1082

Program crash 9 IoCs

pid	pid_target	Process	procid_target
3244	1768	WerFault.exe	80
460	1768	WerFault.exe	80
3636	1768	WerFault.exe	80
836	1768	WerFault.exe	80
3484	1768	WerFault.exe	80
1456	1768	WerFault.exe	80
3784	1768	WerFault.exe	80
4212	1768	WerFault.exe	80
2648	1768	WerFault.exe	80

Kills process with taskkill 1 IoCs

evasion

pid	Process
1536	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1768	file.exe
1768	file.exe
1768	file.exe
1768	file.exe
1768	file.exe
1768	file.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1536	taskkill.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 1604	1768	file.exe	105
PID 1768 wrote to memory of 1604	1768	file.exe	105
PID 1768 wrote to memory of 1604	1768	file.exe	105
PID 1768 wrote to memory of 1744	1768	file.exe	109
PID 1768 wrote to memory of 1744	1768	file.exe	109
PID 1768 wrote to memory of 1744	1768	file.exe	109
PID 1744 wrote to memory of 1536	1744	cmd.exe	111
PID 1744 wrote to memory of 1536	1744	cmd.exe	111
PID 1744 wrote to memory of 1536	1744	cmd.exe	111

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 use of WriteProcessMemory
PID:1768
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 452
  2⤵
  - Program crash
  PID:3244
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 768
  2⤵
  - Program crash
  PID:460
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 788
  2⤵
  - Program crash
  PID:3636
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 788
  2⤵
  - Program crash
  PID:836
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 768
  2⤵
  - Program crash
  PID:3484
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 928
  2⤵
  - Program crash
  PID:1456
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 1012
  2⤵
  - Program crash
  PID:3784
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 940
  2⤵
  - Program crash
  PID:4212
- C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\rFaB2.exe
  2⤵
  - Executes dropped EXE
  PID:1604
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1768 -s 1436
  2⤵
  - Program crash
  PID:2648
- 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:1744
- - C:\Windows\SysWOW64\taskkill.exe
    taskkill /im "file.exe" /f
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1536

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1768 -ip 1768
1⤵
PID:2716

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 1768 -ip 1768
1⤵
PID:4384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1768 -ip 1768
1⤵
PID:488

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 1768 -ip 1768
1⤵
PID:2224

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 1768 -ip 1768
1⤵
PID:3108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1768 -ip 1768
1⤵
PID:1844

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 1768 -ip 1768
1⤵
PID:948

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1768 -ip 1768
1⤵
PID:64

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 1768 -ip 1768
1⤵
PID:2240

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

rFaB2.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\rFaB2.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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rFaB2.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\rFaB2.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1768-134-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1768-138-0x000000000080D000-0x000000000083E000-memory.dmp

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memory/1768-139-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1768-140-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1768-132-0x000000000080D000-0x000000000083E000-memory.dmp

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memory/1768-145-0x000000000080D000-0x000000000083E000-memory.dmp

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memory/1768-146-0x0000000000400000-0x00000000004B0000-memory.dmp

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memory/1768-133-0x0000000000600000-0x0000000000653000-memory.dmp

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