nymaim | 8272b177a75a185528fd65ab8159e238b4616f1783a8da674160fd0f207dd521

Analysis

max time kernel
52s
max time network
53s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
11/01/2023, 06:32

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General

Target
file.exe
Size 1.3MB
Sample230111-hamvdaed5z
SHA256 8272b177a75a185528fd65ab8159e238b4616f1783a8da674160fd0f207dd521
MD5 d73bb80569a1f4ffd799a90be2ddc70f
SHA1 cd3c38a80a440ae3149ad9f068eef14094184316
SHA512 cb7c45d2a29b7321cc012af7ca374c3de84cd5c192eb7ae2b56ec2de98b26546a71d382a4423d9fc50562685903f88a29d671c45a599df025e763359e11a4c2c
SSDEEP 24576:q20IJRAG3Dq305OIyLrzi0HaABu8YMRo6JfJyTpE5FnAjOtOagXC75ld1qSVpk:q2YGG3PZHlBJYko6RY65FAKOed1qapk
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
1668	file.tmp
520	LitFiles137.exe
916	7RlEFSBrMZm4cm.exe

Loads dropped DLL 6 IoCs

pid	Process
1540	file.exe
1668	file.tmp
1668	file.tmp
1668	file.tmp
1668	file.tmp
520	LitFiles137.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-8VTU8.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-Q3CQG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JEVST.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-N9IJ6.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-53OLT.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-S4AFK.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-AGE68.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-VCA3N.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3R8A0.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-5PPQH.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-UTJGQ.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\LitFiles137.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-J76SG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KNLB4.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-SKEDB.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
756	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
520	LitFiles137.exe
520	LitFiles137.exe
520	LitFiles137.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	756	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1540 wrote to memory of 1668	1540	file.exe	28
PID 1668 wrote to memory of 520	1668	file.tmp	29
PID 1668 wrote to memory of 520	1668	file.tmp	29
PID 1668 wrote to memory of 520	1668	file.tmp	29
PID 1668 wrote to memory of 520	1668	file.tmp	29
PID 520 wrote to memory of 916	520	LitFiles137.exe	30
PID 520 wrote to memory of 916	520	LitFiles137.exe	30
PID 520 wrote to memory of 916	520	LitFiles137.exe	30
PID 520 wrote to memory of 916	520	LitFiles137.exe	30
PID 520 wrote to memory of 1652	520	LitFiles137.exe	33
PID 520 wrote to memory of 1652	520	LitFiles137.exe	33
PID 520 wrote to memory of 1652	520	LitFiles137.exe	33
PID 520 wrote to memory of 1652	520	LitFiles137.exe	33
PID 1652 wrote to memory of 756	1652	cmd.exe	35
PID 1652 wrote to memory of 756	1652	cmd.exe	35
PID 1652 wrote to memory of 756	1652	cmd.exe	35
PID 1652 wrote to memory of 756	1652	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:1540
- C:\Users\Admin\AppData\Local\Temp\is-16TJR.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-16TJR.tmp\file.tmp" /SL5="$8012C,1080796,212992,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:1668
- - C:\Program Files (x86)\Split Files\LitFiles137.exe
    "C:\Program Files (x86)\Split Files\LitFiles137.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:520
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\7RlEFSBrMZm4cm.exe
      4⤵
      Executes dropped EXE
      PID:916
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "LitFiles137.exe" /f & erase "C:\Program Files (x86)\Split Files\LitFiles137.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1652
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles137.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:756

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

LitFiles137.exe

Path C:\Program Files (x86)\Split Files\LitFiles137.exe
Size 1.8MB
SHA256 d3df6a66435cd02a50fa91eda47dea72870c3fdaf0e895c6ebe8ea8bce641367
MD5 82d68d39a36436828068679b64b0c2f2
SHA1 3a2a56b948a40d83cb0038214f9ae065002f4e83
SHA512 a36b63d23771cb750d2f77606724a07fb4e0f4152299d1f3d4431d005f9d7a2e3bea7dda454608359e688122842e3bb7074a32f914c110ea4f1b38dd526cb242
SSDEEP 24576:K6/kBKMdZBggSjOJS0B48IYR6I8oxvkVvs4B+UKkxNO3/r4Xt+zIRS:S7dZBggSjOJ1487xvkxPC/T
MD5 SHA1 SHA512 SSDEEP

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LitFiles137.exe

Path C:\Program Files (x86)\Split Files\LitFiles137.exe
Size 1.8MB
SHA256 d3df6a66435cd02a50fa91eda47dea72870c3fdaf0e895c6ebe8ea8bce641367
MD5 82d68d39a36436828068679b64b0c2f2
SHA1 3a2a56b948a40d83cb0038214f9ae065002f4e83
SHA512 a36b63d23771cb750d2f77606724a07fb4e0f4152299d1f3d4431d005f9d7a2e3bea7dda454608359e688122842e3bb7074a32f914c110ea4f1b38dd526cb242
SSDEEP 24576:K6/kBKMdZBggSjOJS0B48IYR6I8oxvkVvs4B+UKkxNO3/r4Xt+zIRS:S7dZBggSjOJ1487xvkxPC/T
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-16TJR.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-16TJR.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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7RlEFSBrMZm4cm.exe

Path C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\7RlEFSBrMZm4cm.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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LitFiles137.exe

Path \Program Files (x86)\Split Files\LitFiles137.exe
Size 1.8MB
SHA256 d3df6a66435cd02a50fa91eda47dea72870c3fdaf0e895c6ebe8ea8bce641367
MD5 82d68d39a36436828068679b64b0c2f2
SHA1 3a2a56b948a40d83cb0038214f9ae065002f4e83
SHA512 a36b63d23771cb750d2f77606724a07fb4e0f4152299d1f3d4431d005f9d7a2e3bea7dda454608359e688122842e3bb7074a32f914c110ea4f1b38dd526cb242
SSDEEP 24576:K6/kBKMdZBggSjOJS0B48IYR6I8oxvkVvs4B+UKkxNO3/r4Xt+zIRS:S7dZBggSjOJ1487xvkxPC/T
MD5 SHA1 SHA512 SSDEEP

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file.tmp

Path \Users\Admin\AppData\Local\Temp\is-16TJR.tmp\file.tmp
Size 695KB
SHA256 f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734
MD5 415533bb40980951c966665cff9e2fe7
SHA1 fce396c8fa01876dd008f22c8be9a9b706f4aaec
SHA512 3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae
SSDEEP 12288:zuA/ac4cUrPN37qzHxA6bA7xfmL+weNERfJbkrNZcRgJmuxffDkNQXExyc:zN/ac4cUrPN37qzHxA6odmL+tNE70tmZ
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path \Users\Admin\AppData\Local\Temp\is-79KTD.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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_shfoldr.dll

Path \Users\Admin\AppData\Local\Temp\is-79KTD.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-79KTD.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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7RlEFSBrMZm4cm.exe

Path \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\7RlEFSBrMZm4cm.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/520-81-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/520-70-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/520-71-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/520-73-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/520-84-0x0000000000400000-0x00000000013C2000-memory.dmp

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memory/520-77-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1540-54-0x0000000075931000-0x0000000075933000-memory.dmp

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memory/1540-68-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/1540-85-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/1540-55-0x0000000000400000-0x000000000043B000-memory.dmp

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memory/1668-69-0x0000000003610000-0x00000000045D2000-memory.dmp

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