nymaim | 6c93bbb8e13c7e08dca24fc0edfe562a3a92637116deadcc5df2c1c97164b791

Analysis

max time kernel
53s
max time network
54s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
07/01/2023, 06:02

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General

Target
file.exe
Size 1.9MB
Sample230107-grflyscg98
SHA256 6c93bbb8e13c7e08dca24fc0edfe562a3a92637116deadcc5df2c1c97164b791
MD5 f9d3786ff39800172becfc5f293d3fba
SHA1 f6f80738e3dab03e6bcc2ecd7372234414703ff9
SHA512 2525de7e24434b1555cc7165466b19b1b687bd7c806824dd8bf1db63a8d6d37fa89fa716cde92619941ec6f447a06c5ca8a5a6222c66248ac71f9653f0fb15f0
SSDEEP 49152:z2ULLK61qQb2/RjNZ0mdi19pheDqcNCjC8OV3Y11C:6ULLIHjj5kbpEDqcNGCZVo1k
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
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 3 IoCs

pid	Process
1976	file.tmp
1552	LitFiles133.exe
876	oqmjO.exe

Loads dropped DLL 6 IoCs

pid	Process
2012	file.exe
1976	file.tmp
1976	file.tmp
1976	file.tmp
1976	file.tmp
1552	LitFiles133.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

Drops file in Program Files directory 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-V8CGV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-S0L8G.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\LitFiles133.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-U6BUN.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-2EB7F.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CKHPF.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-RTVMN.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MDOT5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-K2RVH.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-AKUVR.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-QI7OD.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-C6OH8.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-57NST.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-GDQRL.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-69MKD.tmp	file.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
1112	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1552	LitFiles133.exe
1552	LitFiles133.exe
1552	LitFiles133.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1112	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 2012 wrote to memory of 1976	2012	file.exe	28
PID 1976 wrote to memory of 1552	1976	file.tmp	29
PID 1976 wrote to memory of 1552	1976	file.tmp	29
PID 1976 wrote to memory of 1552	1976	file.tmp	29
PID 1976 wrote to memory of 1552	1976	file.tmp	29
PID 1552 wrote to memory of 876	1552	LitFiles133.exe	30
PID 1552 wrote to memory of 876	1552	LitFiles133.exe	30
PID 1552 wrote to memory of 876	1552	LitFiles133.exe	30
PID 1552 wrote to memory of 876	1552	LitFiles133.exe	30
PID 1552 wrote to memory of 760	1552	LitFiles133.exe	33
PID 1552 wrote to memory of 760	1552	LitFiles133.exe	33
PID 1552 wrote to memory of 760	1552	LitFiles133.exe	33
PID 1552 wrote to memory of 760	1552	LitFiles133.exe	33
PID 760 wrote to memory of 1112	760	cmd.exe	35
PID 760 wrote to memory of 1112	760	cmd.exe	35
PID 760 wrote to memory of 1112	760	cmd.exe	35
PID 760 wrote to memory of 1112	760	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Users\Admin\AppData\Local\Temp\is-TSHCC.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-TSHCC.tmp\file.tmp" /SL5="$70122,1693076,181760,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1976
- - C:\Program Files (x86)\Split Files\LitFiles133.exe
    "C:\Program Files (x86)\Split Files\LitFiles133.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1552
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\oqmjO.exe
      4⤵
      Executes dropped EXE
      PID:876
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "LitFiles133.exe" /f & erase "C:\Program Files (x86)\Split Files\LitFiles133.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:760
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles133.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1112

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

LitFiles133.exe

Path C:\Program Files (x86)\Split Files\LitFiles133.exe
Size 3.2MB
SHA256 7652a8fabaf07a1e342add851546f326da00dd40a73ac425ac40658f9c889265
MD5 d8aa5a312655c956eee7ecdc4401c02f
SHA1 251a7673db04a36f6e7361bb729be66f641229d1
SHA512 144b92d53a03c62d14ffced41f3e279678dd48f4a04389cef1893697485b46e785dd2984de81fc8a345e1a26287f4d9a766ca0c24d8c7b15731e52025e0af29b
SSDEEP 49152:RWeLvO3Z1PWkoP8jKaNmbBiq5lFxXX0Hvp:RWeLvO3Z1Pv+8jtUbBiq5lFxXX0Hvp
MD5 SHA1 SHA512 SSDEEP

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LitFiles133.exe

Path C:\Program Files (x86)\Split Files\LitFiles133.exe
Size 3.2MB
SHA256 7652a8fabaf07a1e342add851546f326da00dd40a73ac425ac40658f9c889265
MD5 d8aa5a312655c956eee7ecdc4401c02f
SHA1 251a7673db04a36f6e7361bb729be66f641229d1
SHA512 144b92d53a03c62d14ffced41f3e279678dd48f4a04389cef1893697485b46e785dd2984de81fc8a345e1a26287f4d9a766ca0c24d8c7b15731e52025e0af29b
SSDEEP 49152:RWeLvO3Z1PWkoP8jKaNmbBiq5lFxXX0Hvp:RWeLvO3Z1Pv+8jtUbBiq5lFxXX0Hvp
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-TSHCC.tmp\file.tmp
Size 820KB
SHA256 9c5872756fa6fb90c382f47a7d768237fad13c4464f0fe0996808c79ffc56e60
MD5 c918c18c921ab538c31033c0a4478e51
SHA1 cc468af59f91bac824f994361d20c90edddf0604
SHA512 fc9ced5ab7dfafc794606faf5ac426af67361ef3c30fbb6fd993c77abf2ee15cfd86f9913c89b0f36afa4b7decc748418ab18c4b72a1d885b0e8b1ab71d27c6b
SSDEEP 24576:iN/ac4cUrPN37qzHxA6odmL+tNE70tm8ffImLLyXEx9Si:iNSjrPN37qzHxA6odRkymJmLL3V
MD5 SHA1 SHA512 SSDEEP

Submit Download

file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-TSHCC.tmp\file.tmp
Size 820KB
SHA256 9c5872756fa6fb90c382f47a7d768237fad13c4464f0fe0996808c79ffc56e60
MD5 c918c18c921ab538c31033c0a4478e51
SHA1 cc468af59f91bac824f994361d20c90edddf0604
SHA512 fc9ced5ab7dfafc794606faf5ac426af67361ef3c30fbb6fd993c77abf2ee15cfd86f9913c89b0f36afa4b7decc748418ab18c4b72a1d885b0e8b1ab71d27c6b
SSDEEP 24576:iN/ac4cUrPN37qzHxA6odmL+tNE70tm8ffImLLyXEx9Si:iNSjrPN37qzHxA6odRkymJmLL3V
MD5 SHA1 SHA512 SSDEEP

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oqmjO.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\oqmjO.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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LitFiles133.exe

Path \Program Files (x86)\Split Files\LitFiles133.exe
Size 3.2MB
SHA256 7652a8fabaf07a1e342add851546f326da00dd40a73ac425ac40658f9c889265
MD5 d8aa5a312655c956eee7ecdc4401c02f
SHA1 251a7673db04a36f6e7361bb729be66f641229d1
SHA512 144b92d53a03c62d14ffced41f3e279678dd48f4a04389cef1893697485b46e785dd2984de81fc8a345e1a26287f4d9a766ca0c24d8c7b15731e52025e0af29b
SSDEEP 49152:RWeLvO3Z1PWkoP8jKaNmbBiq5lFxXX0Hvp:RWeLvO3Z1Pv+8jtUbBiq5lFxXX0Hvp
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-4VCU6.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-4VCU6.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-4VCU6.tmp\_isetup\_shfoldr.dll
Size 22KB
SHA256 9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87
MD5 92dc6ef532fbb4a5c3201469a5b5eb63
SHA1 3e89ff837147c16b4e41c30d6c796374e0b8e62c
SHA512 9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3
SSDEEP 384:+Vm08QoKkiWZ76UJuP71W55iWHHoSHigH2euwsHTGHVb+VHHmnH+aHjHqLHxmoq1:2m08QotiCjJuPGw4
MD5 SHA1 SHA512 SSDEEP

Submit Download

file.tmp

Path \Users\Admin\AppData\Local\Temp\is-TSHCC.tmp\file.tmp
Size 820KB
SHA256 9c5872756fa6fb90c382f47a7d768237fad13c4464f0fe0996808c79ffc56e60
MD5 c918c18c921ab538c31033c0a4478e51
SHA1 cc468af59f91bac824f994361d20c90edddf0604
SHA512 fc9ced5ab7dfafc794606faf5ac426af67361ef3c30fbb6fd993c77abf2ee15cfd86f9913c89b0f36afa4b7decc748418ab18c4b72a1d885b0e8b1ab71d27c6b
SSDEEP 24576:iN/ac4cUrPN37qzHxA6odmL+tNE70tm8ffImLLyXEx9Si:iNSjrPN37qzHxA6odRkymJmLL3V
MD5 SHA1 SHA512 SSDEEP

Submit Download

oqmjO.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\oqmjO.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/1552-70-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1552-71-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1552-73-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1552-85-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1552-82-0x0000000000400000-0x0000000001532000-memory.dmp

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memory/1552-77-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1976-81-0x0000000003690000-0x00000000047C2000-memory.dmp

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memory/1976-69-0x0000000003690000-0x00000000047C2000-memory.dmp

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memory/2012-68-0x0000000000400000-0x0000000000433000-memory.dmp

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memory/2012-54-0x0000000075761000-0x0000000075763000-memory.dmp

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memory/2012-86-0x0000000000400000-0x0000000000433000-memory.dmp

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memory/2012-55-0x0000000000400000-0x0000000000433000-memory.dmp

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